CN103296673A

CN103296673A - Debugging method for +/- 800 kV ultra-high voltage direct-current transmission project system

Info

Publication number: CN103296673A
Application number: CN2013101696966A
Authority: CN
Inventors: 杨万开; 印永华; 曾南超; 班连庚; 王华伟; 李新年; 谢国平; 王明新; 蒋卫平; 王亮; 刘耀; 孙栩; 杨鹏; 雷霄; 张晋华; 朱艺颖; 陈凌芳; 杨超
Original assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Current assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2013-05-09
Filing date: 2013-05-09
Publication date: 2013-09-11
Anticipated expiration: 2033-05-09
Also published as: CN103296673B

Abstract

The invention relates to a debugging method for a +/- 800 kV ultra-high voltage direct-current transmission project system. The system comprises convertor stations at two ends and a direct-current transmission line. The debugging method for the +/- 800 kV ultra-high voltage direct-current transmission project system comprises the following steps that (I) the +/- 800 kV ultra-high voltage direct-current transmission project system is subjected to calculation and analysis; (II) a debugging scheme for the +/- 800 kV ultra-high voltage direct-current transmission project system is formed; (III) a debugging plan for the +/- 800 kV ultra-high voltage direct-current transmission project system is made; (IV) the +/- 800 kV ultra-high voltage direct-current transmission project system is subjected to a field debugging test; (V) the +/- 800 kV ultra-high voltage direct-current transmission project system is subjected to a pilot run; (VI) the +/- 800 kV ultra-high voltage direct-current transmission project system is subjected to a debugging summary. According to the debugging method for the +/- 800 kV ultra-high voltage direct-current transmission project system, a single current converter and a monopolar and bipolar system debugging test are combined for the first time, therefore, the efficiency of a system debugging test is improved, the system debugging speed is increased, good conditions are created for finishing system debugging in advance, and experience and reference are provided for the debugging of a direct-current transmission project system in future.

Description

A kind of ± 800kV extra-high voltage direct-current transmission engineering system adjustment method

Technical field

The present invention relates to the extra-high voltage direct-current transmission field, be specifically related to a kind of ± 800kV extra-high voltage direct-current transmission engineering system and adjustment method thereof.

Background technology

± 800kV extra-high voltage direct-current transmission engineering is with galvanic mode electric energy transmitting, with ± 500kV DC transmission engineering relatively, characteristics are that the capacity of transmitting electric power is big, distance, reach that 2000km is above, major loop wiring operational mode is many, system configuration complexity etc.The debugging of extra-high voltage DC transmission system is a very complicated system engineering, relate to DC engineering once with secondary device than ± the 500kV DC transmission engineering is many, pilot project is many, also relate to the operational mode of AC system, need carry out careful examination and check, the combine closely characteristics of extra-high voltage direct-current transmission engineering of system debug, carry out the simulation calculation of DC engineering sending end and receiving-end system trend and stability Calculation and direct current system debug-item, formulate system debug scheme and test plan scheme, finish to safe and efficient high-quality debug-item, for the acceptance of work provides technical basis, guarantee that engineering puts into operation on time, by the upwards system debug research of extra-high voltage direct-current transmission engineering and the practice of engineering, formed a whole set of ± method of 800kV extra-high voltage direct-current transmission engineering system debugging.

Do not see the similarly open report of relevant ± 800kV ultra high voltage HVDC (High Voltage Direct Current) transmission system adjustment method at present both at home and abroad as yet.

Summary of the invention

At the deficiencies in the prior art, the purpose of this invention is to provide a kind of ± 800kV extra-high voltage direct-current transmission engineering system, the adjustment method of a kind of ± 800kV extra-high voltage direct-current transmission engineering system that another purpose provides, extra-high voltage direct-current transmission engineering operation voltage height, transmission power is big, transmission distance is far away, requires higher to equipment and systematic function.The system debug of engineering is the check to whole direct current system performance, so extra-high voltage direct-current system debug method ratio ± 500kV high voltage direct current transmission project is more detailed, content is abundanter, make the debugging scheme more comprehensively, careful debugging scheme and the test plan formulated, finish to safe and efficient high-quality debug-item, for the acceptance of work provides technical basis.

The objective of the invention is to adopt following technical proposals to realize:

A kind of ± 800kV extra-high voltage direct-current transmission engineering system, its improvements are that described system comprises two ends current conversion station and DC power transmission line, and described two ends current conversion station connects by DC power transmission line; The two ends current conversion station all adopts bipolar converter, and every utmost point converter comprises 12 pulse conversion devices of 2 series connection, and series voltage is pressed ± (400+400) kV series connection;

Single-ended current conversion station direct current one pole normally moves direct voltage, and single 12-pulse conversion device operation direct voltage is 400kV.

Preferably, ± the major loop mode of connection of 800kV extra-high voltage direct-current transmission engineering system comprises:

＜1〉the single converter mode of connection: comprise that the one pole metal returns half and presses 400kV operation and one pole the earth to return half pressure 400kV operation;

＜2〉the one pole double converter mode of connection: comprise that the one pole metal returns total head 800kV operation and the one pole the earth returns total head 800kV operation;

＜3〉the bipolar mode of connection: comprise bipolar ± 800kV total head operation, bipolar uneven mixed-voltage operation and bipolar half voltage ± 400kV operation;

＜4〉ice-melt mode of connection operation.

The present invention is based on the adjustment method of a kind of ± 800kV extra-high voltage direct-current transmission engineering system that another purpose provides, its improvements are that described method comprises the steps:

(1) ± computational analysis of 800kV extra-high voltage direct-current transmission engineering system;

(2) establishment ± 800kV extra-high voltage direct-current transmission engineering system debugging scheme;

(3) formulation ± 800kV extra-high voltage direct-current transmission engineering system debugging plan;

(4) field adjustable that carries out of right ± 800kV extra-high voltage direct-current transmission engineering system is tested;

(5) ± trial run of 800kV extra-high voltage direct-current transmission engineering system;

(6) ± 800kV extra-high voltage direct-current transmission engineering system debugging summary.

Preferably, in the described step (), described ± 800kV extra-high voltage direct-current transmission engineering system computational analysis comprises:

(1) generates the data file that confession ± 800kV extra-high voltage direct-current transmission engineering system debugging computational analysis is used;

(2) ± the 800kV extra-high voltage direct-current transmission engineering system debugging computational analysis of operational mode;

(3) ± computational analysis of 800kV extra-high voltage direct-current transmission engineering system debug-item;

(4) ± safety and stability computational analysis and accident prevention measures analysis under the 800kV extra-high voltage direct-current transmission engineering system debud mode;

(5) ± calculating of 800kV extra-high voltage direct-current transmission engineering system electromagnetic transient overvoltage.

Preferably, in described (5), the electromagnetism steady-state overvoltage comprises the overvoltage that the overvoltage of stopping transport overvoltage that the ac bus single-phase earthing causes, overvoltage that the converter valve pulse-losing causes, overvoltage, current conversion station DC side that DC line fault causes the overvoltage that causes, the online switching of overvoltage, single converter that the Inverter Station load rejection causes causing and the conversion of one pole the earth metallic return cause.

Preferably, in the described step (), the technical supervision of current conversion station subsystem is carried out at the scene, understands content and the pilot project of current conversion station subsystem debugging, and result of the test and the technical report of the debugging of examination subsystem are reported subsystem technical supervision result to the engineering owner.

Preferably, in the described step (two), formulate described ± 800kV extra-high voltage direct-current transmission engineering system debugging scheme according to the major loop mode of connection of single converter system, one pole double converter system, bipolar DC system and the online fling-cut system of single converter, comprising:

＜1〉the debugging scheme of single converter system;

＜2〉the debugging scheme of one pole double converter system;

＜3〉bipolar DC system debugging scheme;

＜4〉ice-melt mode of connection debugging scheme.

Preferably, described＜1〉in, the major loop mode of connection of one pole single converter is divided into the basic mode of connection and converter improved cross connect mode, and the basic mode of connection comprises: utmost point I low side converter wiring mode, the high-end converter wiring mode of utmost point I, utmost point II low side converter wiring mode and the high-end converter wiring mode of utmost point II; The improved cross connect mode comprises: rectification side pole I low side converter is connected with the high-end converter of inversion side, the high-end converter of rectification side pole I is connected with inversion side low side converter, rectification side pole II low side converter is connected with the high-end converter of inversion side is connected with inversion side low side converter with the high-end converter of rectification side pole I;

The debugging scheme of described single converter comprises the debugging scheme of the basic mode of connection and the debugging scheme of converter improved cross connect mode.

Preferably, the debugging scheme of the described basic mode of connection comprises:

1) starting under the earth/metal connection mode/stoppage in transit test: being used for affirmation ± 800kV extra-high voltage direct-current transmission engineering system starts/and the stoppage in transit function is normal, and the safety of realization ± 800kV extra-high voltage direct-current transmission engineering system test is carried out;

2) protection trip test: it is normal to be used for affirmation ± 800kV extra-high voltage direct-current transmission engineering system protection tripping operation action, the safety of assurance ± 800kV extra-high voltage direct-current transmission engineering system and equipment;

3) steady-state behaviour and operation, control model test: be used for confirming that the function of various operations, control model and conversion thereof are normal;

4) direct current mode of connection conversion: be used for the big earthed return of one pole/metallic return translation function is tested;

5) controller parameter optimization test: by the method for step test, DC transmission engineering system controller parameter is tested;

6) Reactive Power Control test: be used for check current conversion station Reactive Power Control performance and whether satisfy code requirement (the Reactive Power Control test that refers to is the functional verification test of current conversion station Reactive Power Control, checks current conversion station Reactive Power Control function whether to satisfy demand of technical standard by test);

7) converter is lost trigger impulse/commutation failure test: be used for the disturbance rejection performance of check two ends current conversion station DC control protection system, see whether satisfy code requirement;

8) single converter operation DC line fault test: be used for checking DC line protection performance, fault to restart order and FLU Fault Location Unit precision, see whether satisfy demand of technical standard;

9) loss of auxiliary power, redundance unit and liaison test: be used for confirming whether action and the handoff functionality of accessory power supply, redundance unit and liaison device be normal, for the high-power test of DC transmission engineering system is prepared;

10) with the test of direct current system power modulation function: the classification that is used for the check direct current power promotes with returning falls function and direct current power modulation to strengthening the effect of system damping;

11) rated power steady-state behaviour and operation, control model transfer test: be used for confirming that when transmission was high-power, the function of various operations, control model and conversion thereof were normal;

Comprise: the conversion of the direct current mode of connection: be used for the big earthed return of single converter/metallic return translation function is tested; Converter transformer shunting switch control test;

12) rated power and overload trial: be used for the temperature rise of test DC transmission engineering system equipment, check the through-current capability of whole DC transmission engineering system; Earth electrode test, harmonic wave, noise and radio interference test are carried out at this moment;

13) Reactive Power Control test: be used for check current conversion station Reactive Power Control performance and whether satisfy demand of technical standard;

The debugging scheme of described converter improved cross connect mode comprises:

Starting under I, the earth/metal connection mode/stoppage in transit test: being used for affirmation ± 800kV extra-high voltage direct-current transmission engineering system starts/and the stoppage in transit function is normal, carries out with the safety that guarantees system test;

II, steady-state behaviour and operation test: be used for confirming that the function of power/current lifting, control system switching is normal.

Preferably, described＜2〉in, the major loop mode of connection of one pole double converter system is divided into utmost point I and the utmost point II mode of connection;

The debugging scheme of described one pole double converter system comprises:

Starting under A, the earth/metal connection mode/stoppage in transit test: being used for the affirmation system starts/and the stoppage in transit function is normal, carries out with the safety that guarantees system test;

B, protection trip test: be used for confirming that system protection tripping operation action is normal, with the safety of assurance system and equipment;

C, steady-state behaviour and operation, control model test: be used for confirming that the function of various operations, control model and conversion thereof are normal;

D, the conversion of the direct current mode of connection: be used for the big earthed return of one pole/metallic return translation function is tested;

E, controller parameter optimization test: by the method for step test, controller parameter is tested;

F, Reactive Power Control test: be used for check current conversion station Reactive Power Control performance and whether satisfy code requirement;

G, the test of one pole operation DC line fault: be used for checking DC line protection performance, fault to restart order and FLU Fault Location Unit precision, see whether satisfy code requirement;

H, loss of auxiliary power, redundance unit and liaison test: all should be normal for functions such as the action of confirming these devices and equipment and switchings, for the high-power test of direct current system is got ready;

I, the test relevant with direct current system power modulation function: the classification that is used for the check direct current power promotes with returning falls function and direct current power modulation to strengthening the effect of system damping;

J, rated power steady-state behaviour and operation, control model transfer test: be used for confirming that when transmission was high-power, the function of various operations, control model and conversion thereof were normal;

Comprise: the conversion of the direct current mode of connection: be used for the big earthed return of one pole/functions such as metallic return conversion are tested;

K, rated power and overload trial: be used for the temperature rise of test equipment, the through-current capability of check one pole direct current system; Alternating current-direct current harmonic wave, noise and radio interference test are carried out at this moment;

L, Reactive Power Control test: be used for check current conversion station Reactive Power Control performance and whether satisfy code requirement.

Preferably, described＜3〉in, the major loop mode of connection of bipolar DC system is divided into the bipolar double converter mode of connection, two uneven converter wiring mode and the bipolar single converter mode of connection;

The debugging scheme of described bipolar DC system comprises: the debugging scheme of the debugging scheme of the bipolar double converter mode of connection, the debugging scheme of two uneven converter wiring modes and the bipolar single converter mode of connection.

Preferably, the debugging scheme of the described bipolar double converter mode of connection comprises:

1. bipolar double converter direct current system plays/stops test:

The function of starting, stoppage in transit and protection action stoppage in transit when being used for normal and the no communication of the bipolar double converter direct current system of checking;

2. utmost point tripping operation, the power transfer test:

To bipolar operation, utmost point tripping operation locking, power transfer function to another utmost point is checked;

3. power control test:

Be used for checking direct current system normal starting and stable operation under power control mode;

4. brownout operation test:

Whether be used for the bipolar brownout operation control of checking function normal;

5. upset test: be used for checking that the auxiliary AC power of current conversion station switches, whether dc fields neutral bus Region control defencive function satisfies demand of technical standard;

6. alternating current circuit Test to Failure:

Be used for the check fault in ac transmission system to the influence of direct current system operation;

7. Reactive Power Control test:

The function of Reactive Power Control and alternating voltage control when moving for the bipolar double converter of checking;

8. stable device uniting and adjustment and with the test of stable device direct current debugging: the lifting of check direct current power is fallen function, direct current power modulation to the effect of enhancings ± 800kV extra-high voltage direct-current transmission engineering system damping with returning, and stable device and DC control system interface are tested;

9. rated power and overload trial:

Be used for the steady operation performance that the examination direct current is carried rated power, brownout operation, and various overladen ability; Alternating current-direct current harmonic wave, noise and radio interference are tested, check whether satisfy demand of technical standard; (demand of technical standard proposes in project engineering stage, comprises main performance and the parameter selection of primary equipment, the function of secondary control protection system etc.Standard proposes is the research of the voltage according to DC engineering, specified transmission power, rated current and two ends AC system and definite.）

The debugging scheme of described two uneven converter wiring modes comprises:

One) bipolar uneven converter direct current system plays/stops test:

The function of starting, stoppage in transit and protection action stoppage in transit when being used for normal and the no communication of checking bipolar DC system;

Two) utmost point tripping operation, the power transfer test:

To bipolar uneven converter operation, utmost point tripping operation locking, power transfer function to another utmost point is checked;

Three) power control test:

Four) Reactive Power Control test:

The function of Reactive Power Control and alternating voltage control when moving for bipolar 3 converters of checking;

Five) stable device uniting and adjustment and with the test of stable device direct current debugging: the lifting of check direct current power is fallen function, direct current power modulation to strengthening the effect of system damping with returning, and the test of stable device and DC control system interface;

The debugging scheme of the described bipolar single converter mode of connection comprises:

I, bipolar single converter direct current system play/stop test:

Ii, utmost point tripping operation, the power transfer test:

Iii, power control test:

But be used for checking direct current system normal starting and stable operation under power control mode.

Iv, stable device uniting and adjustment and with the test of stable device direct current debugging: the lifting of check direct current power is fallen function, direct current power modulation to strengthening the effect of system damping with returning, and the various tests of stable device and DC control system interface.

Preferably, in the described step (four), organize DC engineering system for field debugging test; The tracking computational analysis of field adjustable testing program; The result analyzes to debugging test, and the DC transmission engineering Technical properties of plant is provided evaluation.

Preferably, in the described step (six), the field adjustable data is put in order, filed; Right ± 800kV extra-high voltage direct-current transmission engineering system debug results is analyzed, is concluded; Write ± report of 800kV extra-high voltage direct-current transmission engineering system debugging technique, debug results and conclusion are analyzed and researched, provide the system debug conclusion.

Compared with the prior art, the beneficial effect that reaches of the present invention is:

Compare with 500kV high voltage direct current transmission project system debug method, extra-high voltage direct-current transmission engineering system adjustment method has following advantage:

(1) ± and 800kV extra-high voltage direct-current engineering major loop has 46 kinds of modes of connection, and ± 500kV high voltage direct current transmission project major loop has 5 kinds of modes of connection.In the engineering system debug process, equipment performance under each mode of connection and function all will be tested, so extra-high voltage direct-current transmission engineering system debugging test project than ± 500kV high voltage direct current transmission project system test project is many, make that the debugging scope is more comprehensive, provide foundation for equipment puts into operation.

(2) extra-high voltage direct-current transmission engineering operation voltage height, transmission power is big, and transmission distance is far away, requires higher to equipment and systematic function.The system debug of engineering is the check to whole direct current system performance, so extra-high voltage direct-current system debug method ratio ± 500kV high voltage direct current transmission project is more detailed, content is abundanter.

(3) extra-high voltage direct-current engineering system debug-item is many, and the system debug cycle is long, and it is particularly important that the system debug plan just seems.In order to finish the system debug task high-quality and efficiently, the system debug project is optimized combination, guarantee that equipment performance and control defencive function are fully verified.

(4) extra-high voltage direct-current transmission engineering transmission distance is far away, can be transported to developed area, region following the line of the sea, east to the water power in China western part, alleviate coastal region in east China power shortage situation effectively, effectively promoted the economic development of western and eastern region.

(5) extra-high voltage direct-current engineering major loop equipment is many, and the system debug participant is more, and cooperatively interacting between each ginseng accent unit is extremely important.Owing to be charged the test, personal safety, device security and system safety problem are more outstanding, must strengthen cooperation and link up, and the assurance system debug is carried out putting into operation with engineering smoothly on schedule.

(6) the present invention combines single converter, one pole and bipolar DC system debugging test first, improved the system debug test efficiency, accelerated the speed of system debug, created good condition for fulfiling system debug ahead of schedule, for DC transmission engineering system debug from now on provides experience reference and reference.

(7) the present invention has proposed for the first time with above-mentioned concrete system debug outline, and the system debug scheme is formulated in the system-computed analysis, organizes step such as fielded system debugging test to combine, and forms the adjustment method of extra-high voltage direct-current transmission engineering system.This method has systematically solved various technical problems in the extra-high voltage direct-current transmission engineering system debug process, the technology path that provides according to this method, solved preferably in the DC engineering system debug process each participate between construction engineering units, with the engineering owner between cooperation, technically with finishing smoothly that tissue has guaranteed that the extra-high voltage direct-current engineering system debugs.

(8) the present invention by to tame dam-Shanghai, the system debug of silk screen-southern Jiangsu extra-high voltage direct-current transmission engineering, formed method and the technology path of a whole set of extra-high voltage direct-current transmission engineering system debugging, debugging for the extra-high voltage direct-current transmission engineering system of follow-up construction provides experience to use for reference and technology path.

Description of drawings

Fig. 1 is provided by the invention ± 800kV extra-high voltage direct-current transmission engineering major loop winding diagram;

Fig. 2 is the big earthed return mode of the high-end converter of utmost point I provided by the invention figure;

Fig. 3 is the high-end converter of utmost point I rectification side provided by the invention, the big earthed return mode of inversion side low side converter figure;

Fig. 4 is utmost point I rectification side low side converter provided by the invention, the big earthed return mode of the high-end converter of inversion side figure;

Fig. 5 is the big earthed return mode of utmost point I low side converter provided by the invention figure;

Fig. 6 is the big earthed return mode of utmost point II low side converter provided by the invention figure;

Fig. 7 is utmost point II rectification side low side converter provided by the invention, the big earthed return mode of the high-end converter of inversion side figure;

Fig. 8 is the high-end converter of utmost point II rectification side provided by the invention, the big earthed return mode of inversion side low side converter figure;

Fig. 9 is the big earthed return mode of the high-end converter of utmost point II provided by the invention figure;

Figure 10 is the high-end converter metallic return of utmost point I provided by the invention mode figure;

Figure 11 is the high-end converter of utmost point I rectification side provided by the invention, inversion side low side converter metallic return mode figure;

Figure 12 is utmost point I rectification side low side converter provided by the invention, the high-end converter metallic return of inversion side mode figure;

Figure 13 is utmost point I low side converter metallic return mode figure provided by the invention;

Figure 14 is utmost point II low side converter metallic return mode figure provided by the invention;

Figure 15 is utmost point II rectification side low side provided by the invention, the high-end single converter metallic return of inversion side mode figure;

Figure 16 is that utmost point II rectification side provided by the invention is high-end, inversion side low side single converter metallic return mode figure;

Figure 17 is the high-end single converter metallic return of utmost point II provided by the invention mode figure;

Figure 18 is utmost point I double converter provided by the invention wiring, big earthed return figure;

Figure 19 is utmost point II double converter provided by the invention wiring, big earthed return figure;

Figure 20 is utmost point I double converter provided by the invention wiring, metallic return figure;

Figure 21 is utmost point I double converter provided by the invention wiring, metallic return figure;

Figure 22 is bipolar double converter mode of connection figure provided by the invention;

Figure 23 is utmost point II double converter provided by the invention wiring, the high-end converter wiring figure of utmost point I;

Figure 24 is utmost point II double converter provided by the invention, the high-end converter of rectification side pole I, inversion side low side converter wiring figure;

Figure 25 is utmost point II double converter provided by the invention, rectification side pole I low side converter, the high-end converter wiring figure of inversion side;

Figure 26 is utmost point II double converter provided by the invention, utmost point I low side converter wiring figure;

Figure 27 is utmost point I double converter provided by the invention, utmost point II low side converter wiring figure;

Figure 28 is utmost point I double converter provided by the invention, rectification side pole II low side converter, the high-end converter wiring figure of inversion side pole II;

Figure 29 is utmost point I double converter provided by the invention, the high-end converter of rectification side pole II, inversion side pole II low side converter wiring figure;

Figure 30 is utmost point I double converter provided by the invention, the high-end converter wiring figure of utmost point II;

Figure 31 is the high-end converter of rectification side pole I provided by the invention, utmost point II low side converter, the high-end converter of inversion side pole I, utmost point II low side converter wiring figure;

Figure 32 is inversion side low side converter provided by the invention, rectification side pole II low side converter, the high-end converter wiring figure of utmost point I;

Figure 33 is rectification side low side converter provided by the invention, inversion side pole II low side converter, the high-end converter wiring figure of utmost point I;

Figure 34 is bipolar low side converter wiring figure provided by the invention;

Figure 35 is the high-end converter of inversion side provided by the invention, rectification side pole II low side converter, the high-end converter wiring of utmost point I

Figure 36 is the high-end converter of rectification side pole I provided by the invention, utmost point II low side converter, inversion side pole I low side converter, the high-end converter wiring figure of utmost point II;

Figure 37 is rectification side low side converter provided by the invention, the high-end converter wiring figure of inversion side;

Figure 38 is rectification side low side converter provided by the invention, inversion side pole I low side converter, the high-end converter wiring figure of utmost point II;

Figure 39 is the high-end converter of rectification side provided by the invention, inversion side pole II low side converter, the high-end converter wiring figure of utmost point I;

Figure 40 is the high-end converter of rectification side provided by the invention, inversion side low side converter wiring figure;

Figure 41 is rectification side pole I low side converter provided by the invention, the high-end converter of utmost point II, the high-end converter of inversion side pole I, utmost point II low side converter wiring figure;

Figure 42 is inversion side low side converter provided by the invention, rectification side pole I low side converter, the high-end converter wiring figure of utmost point II;

Figure 43 is bipolar high-end converter wiring figure provided by the invention;

Figure 44 is the high-end converter of rectification side provided by the invention, inversion side pole I low side converter, the high-end converter wiring figure of utmost point II;

Figure 45 is the high-end converter of inversion side provided by the invention, rectification side pole I low side converter, the high-end converter wiring figure of utmost point II;

Figure 46 is rectification side pole 1 low side converter provided by the invention, the utmost point 2 high-end converters, inversion side pole 1 low side converter, the utmost point 2 high-end converter wiring figure;

Figure 47 is ice-melt mode of connection figure provided by the invention;

Figure 48 is the flow chart of the adjustment method of provided by the invention ± 800kV extra-high voltage direct-current transmission engineering system.

Embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.

The invention provides a kind of ± 800kV extra-high voltage direct-current transmission engineering system, described system comprises two ends current conversion station and DC power transmission line, and the two ends current conversion station connects by DC power transmission line; The two ends current conversion station all adopts bipolar converter, and every utmost point converter comprises 12 pulse conversion devices of 2 series connection, and series voltage is pressed ± (400+400) kV series connection;

Single-ended current conversion station direct current one pole normally moves direct voltage, and single 12-pulse conversion device operation direct voltage is 400kV.Provided by the invention ± 800kV extra-high voltage direct-current transmission engineering major loop winding diagram is as shown in Figure 1.

According to ± 800kV extra-high voltage direct-current transmission The Principle of Engineering Design, its major loop has the following 8 class modes of connection.

(1) bipolar ± 800kV total head operation;

(2) bipolar uneven mixed-voltage operation (utmost point double converter operation 800kV, utmost point single converter operation 400kV);

(3) bipolar half voltage ± 400kV operation (converter operation of every utmost point);

(4) the one pole metal returns total head 800kV operation;

(5) the one pole metal returns half and presses 400kV operation (having only a converter operation);

(6) the one pole the earth returns total head 800kV operation;

(7) the one pole the earth returns half and presses 400kV operation (having only a converter operation);

(8) ice-melt mode of connection operation (the high-end converter parallel running of the high-end converter of utmost point I and utmost point II).

In ± 800kV extra-high voltage direct-current transmission engineering debug process, the above-mentioned major loop mode of connection is divided into four types, comprising:

＜4〉ice-melt mode of connection operation.

Wherein: single converter has 16 kinds of modes of connection, total following 16 kinds of modes of connection:

The big earthed return mode of the high-end converter of utmost point I, its winding diagram as shown in Figure 2.

The high-end converter of utmost point I rectification side, the big earthed return mode of inversion side low side converter, its winding diagram as shown in Figure 3.

Utmost point I rectification side low side converter, the big earthed return mode of the high-end converter of inversion side, its winding diagram as shown in Figure 4.

The big earthed return mode of utmost point I low side converter, its winding diagram as shown in Figure 5.

The big earthed return mode of utmost point II low side converter, its winding diagram as shown in Figure 6.

Utmost point II rectification side low side converter, the big earthed return mode of the high-end converter of inversion side, its winding diagram as shown in Figure 7.

The high-end converter of utmost point II rectification side, the big earthed return mode of inversion side low side converter, its winding diagram as shown in Figure 8.

The big earthed return mode of the high-end converter of utmost point II, its winding diagram as shown in Figure 9.

The high-end converter metallic return of utmost point I mode, its winding diagram as shown in figure 10.

The high-end converter of utmost point I rectification side, inversion side low side converter metallic return mode, its winding diagram as shown in figure 11.

Utmost point I rectification side low side converter, the high-end converter metallic return of inversion side mode, its winding diagram as shown in figure 12.

Utmost point I low side converter metallic return mode, its winding diagram as shown in figure 13.

Utmost point II low side converter metallic return mode, its winding diagram as shown in figure 14.

Utmost point II rectification side low side, the high-end single converter metallic return of inversion side mode, its winding diagram as shown in figure 15.

Utmost point II rectification side is high-end, inversion side low side single converter metallic return mode, and its winding diagram as shown in figure 16.

The high-end single converter metallic return of utmost point II mode, its winding diagram as shown in figure 17.

In the above single converter mode of connection, Fig. 2, Fig. 5, Fig. 6, Fig. 9 are the basic mode of connection of the big earthed return of single converter, Figure 13, and Figure 14, Figure 10, Figure 17 are the basic mode of connection of single converter metallic return; Fig. 3, Fig. 4, Fig. 7, Fig. 8, Figure 11, Figure 12, Figure 15, Figure 16 are single converter improved cross connect mode.

Wherein, the one pole double converter mode of connection, total following 4 kinds of modes of connection:

The wiring of utmost point I double converter, big earthed return (C26), winding diagram is as shown in figure 18.

The wiring of utmost point II double converter, big earthed return (C27), winding diagram is as shown in figure 19.

The wiring of utmost point I double converter, metallic return (C36), winding diagram is as shown in figure 20.

The wiring of utmost point I double converter, metallic return (C37), winding diagram is as shown in figure 21.

Wherein, the bipolar mode of connection comprises bipolar ± 800kV total head (bipolar double converter) mode of connection, and bipolar uneven mixed-voltage operation (the bipolar uneven mode of connection) and bipolar half voltage ± 400kV moves (the bipolar single converter mode of connection).

The bipolar double converter mode of connection has only a kind of mode of connection, and winding diagram as shown in figure 22.

The bipolar uneven mode of connection has following 8 kinds of modes of connection:

The wiring of utmost point II double converter, the high-end converter wiring of utmost point I (C18), winding diagram is as shown in figure 23.

Utmost point II double converter, the high-end converter of rectification side pole I, inversion side low side converter wiring (C19), winding diagram is as shown in figure 24.

Utmost point II double converter, rectification side pole I low side converter, the high-end converter wiring of inversion side (C20), winding diagram is as shown in figure 25.

Utmost point II double converter, utmost point I low side converter wiring (C21), winding diagram is as shown in figure 26.

Utmost point I double converter, utmost point II low side converter wiring (C22), winding diagram is as shown in figure 27.

Utmost point I double converter, rectification side pole II low side converter, the high-end converter wiring of inversion side pole II (C23), winding diagram is as shown in figure 28.

Utmost point I double converter, the high-end converter of rectification side pole II, inversion side pole II low side converter wiring (C24), winding diagram is as shown in figure 29.

Utmost point I double converter, the high-end converter wiring of utmost point II (C25), winding diagram is as shown in figure 30.

In bipolar uneven converter wiring mode, Figure 27 is the basic mode of connection of bipolar uneven converter, and Figure 23, Figure 24, Figure 25, Figure 26, Figure 28, Figure 29, Figure 30 are bipolar uneven converter improved cross connect mode.

The bipolar single converter mode of connection, total following 16 kinds of modes of connection:

The high-end converter of rectification side pole I, utmost point II low side converter, the high-end converter of inversion side pole I, utmost point II low side converter wiring (C02), winding diagram is as shown in figure 31.

Inversion side low side converter, rectification side pole II low side converter, the high-end converter wiring of utmost point I (C03), winding diagram is shown in figure 32.

Rectification side low side converter, inversion side pole II low side converter, the high-end converter wiring of utmost point I (C04), winding diagram is as shown in figure 33.

Bipolar low side converter wiring (C05), winding diagram as shown in figure 34.

The high-end converter of inversion side, rectification side pole II low side converter, the high-end converter wiring of utmost point I (C06), winding diagram is as shown in figure 35.

The high-end converter of rectification side pole I, utmost point II low side converter, inversion side pole I low side converter, the high-end converter wiring of utmost point II (C07), winding diagram is as shown in figure 36.

Rectification side low side converter, the high-end converter wiring of inversion side (C08), winding diagram as shown in figure 37.

Rectification side low side converter, inversion side pole I low side converter, the high-end converter wiring of utmost point II (C09), winding diagram is as shown in figure 38.

The high-end converter of rectification side, inversion side pole II low side converter, the high-end converter wiring of utmost point I (C10), winding diagram is as shown in figure 39.

The high-end converter of rectification side, inversion side low side converter wiring (C11), winding diagram as shown in figure 40.

Rectification side pole I low side converter, the high-end converter of utmost point II, the high-end converter of inversion side pole I, utmost point II low side converter wiring (C12), winding diagram is as shown in figure 41.

Inversion side low side converter, rectification side pole I low side converter, the high-end converter wiring of utmost point II (C13), winding diagram is as shown in figure 42.

Bipolar high-end converter wiring (C14), winding diagram as shown in figure 43.

The high-end converter of rectification side, inversion side pole I low side converter, the high-end converter wiring of utmost point II (C15), winding diagram is as shown in figure 44.

The high-end converter of inversion side, rectification side pole I low side converter, the high-end converter wiring of utmost point II (C16), winding diagram is as shown in figure 45.

Rectification side pole 1 low side converter, the utmost point 2 high-end converters, inversion side pole 1 low side converter, the utmost point 2 high-end converter wirings (C17), winding diagram is as shown in figure 46.

In the bipolar single converter mode of connection, Figure 34 is the basic mode of connection of bipolar single converter, Figure 31, and Figure 32, Figure 33, Figure 35, Figure 36, Figure 37, Figure 38, Figure 39, Figure 40, Figure 41, Figure 42, Figure 43, Figure 44, Figure 45, Figure 46 are bipolar single converter improved cross connect mode.

The online switching of single converter is the distinctive a kind of mode of operation of extra-high voltage direct-current transmission engineering.Each current conversion station of extra-high voltage direct-current engineering has four converters, and each single converter can independent operating according to the single converter mode of connection.Under one pole double converter, bipolar uneven converter and the bipolar double converter mode of connection, can onlinely drop into/withdraw from single converter operation.

The ice-melt mode of connection has only a kind of, adopts the high-end converter of utmost point I to be connected with the high-end converter parallel way of utmost point II, and its winding diagram as shown in figure 47.

The invention provides a kind of ± 800kV extra-high voltage direct-current transmission engineering system adjustment method flow process as shown in figure 48, comprise the steps:

L) collection of computational analysis data and arrangement: generate every data file of using for DC transmission engineering system debug computational analysis;

2) the system debug computational analysis of operational mode: in the operation level year during at system debug, various typical operation modes and the trend thereof that should consider and adopt when research and the system debug of proposition DC transmission engineering distribute;

The computational analysis of 3) system debug project: the system debug project of intending carrying out is done computational analysis, can understanding debug-item to the influence of system's operation and device security, determine to provide technical basis for DC transmission engineering system debug project;

4) the safety and stability computational analysis under the system debug mode and accident prevention Study on Measures: the various typical operation modes of intending consideration during at the DC transmission engineering system debug, by the safety and stability computational analysis, find out the weak link and the accident potential that exist in the DC transmission engineering system; And the security and stability when guaranteeing system debug, study every safety and stability measure and cooperation thereof, work up the safety and stability measure scheme that each debug-item should be equipped with;

5) electromagnetic transient overvoltage calculates

Calculate content:

The overvoltage that the ac bus single-phase earthing causes;

The overvoltage that the converter valve pulse-losing causes;

The overvoltage that DC line fault causes;

The overvoltage that the current conversion station DC side is stopped transport and caused;

The overvoltage that the Inverter Station load rejection causes;

The overvoltage that the online switching of single converter causes;

The overvoltage that the conversion of one pole the earth metallic return causes.

Result of calculation:

A) under current conversion station both sides AC system generation single-phase earthing situation, the overvoltage level of equipment and lightning arrester energy consumption should be in tolerance intervals.

B) converter valve is lost under the 100ms trigger impulse situation continuously, and the overvoltage level of all devices should be in allowed band, and all lightning arrester energy consumptions should be in tolerance interval.

C) take place under the single-phase shorted to earth situation on the DC line, all lightning arrester energy consumptions all should be in tolerance interval, and the overvoltage level of all devices is in allowed band;

D) during the direct current emergency outage, all lightning arrester energy consumptions all should be in tolerance interval, and the overvoltage level of all devices is in allowed band;

When e) Inverter Station taking place in the DC transmission system get rid of whole AC load, the overvoltage of all devices and lightning arrester energy consumption all should be in allowed bands;

F) energy consumption of the overvoltage amplitude that produces in the one pole the earth metallic return transfer process and lightning arrester all should be in allowed limits.

G) overvoltage that produces in the online input of single converter/process out of service can not cause that another converter normally moves in allowed limits.

The basic mode of connection system debug of single converter project:

1) starting under the earth/metal connection mode/stoppage in transit test: the affirmation system starts/and the stoppage in transit function is normal, carries out with the safety that guarantees system test.

2) protection trip test: confirm that system protection tripping operation action is normal, with the safety of assurance system and equipment.

3) steady-state behaviour and operation, control model test: confirm that the function of various operations, control model and conversion thereof are normal.

4) direct current mode of connection conversion: the big earthed return of one pole/functions such as metallic return conversion are tested.

5) controller parameter optimization test: by the method for step test, controller parameter is tested.

6) Reactive Power Control test: whether check current conversion station Reactive Power Control performance satisfies code requirement.

7) converter is lost trigger impulse/commutation failure test: the disturbance rejection performance of check DC control protection system, see whether satisfy code requirement.

8) single converter operation DC line fault test: check DC line protection performance, fault are restarted order and FLU Fault Location Unit precision, see whether satisfy code requirement.When being short-circuited earth fault as DC line, by DC line protection and DC line longitudinal difference protection detection failure, DC line protection is correct, the warm boot success.

9) loss of auxiliary power, redundance unit and liaison test: confirm that functions such as the action of these devices and equipment and switching all should be normal, for the high-power test of direct current system is got ready.

10) test relevant with direct current system power modulation function: the classification of check direct current power promotes with returning falls function and direct current power modulation to strengthening the effect of system damping.

11) rated power steady-state behaviour and operation, control model transfer test: confirm that when transmission was high-power, the function of various operations, control model and conversion thereof were normal.

Comprise: direct current mode of connection conversion: the big earthed return of single converter/functions such as metallic return conversion are tested; Converter transformer shunting switch control test.

12) rated power and overload trial: test the equipment temperature rise, check the through-current capability of whole direct current system.Tests such as earth electrode test, harmonic wave, noise and radio interference also can be arranged in to be carried out this moment.

13) Reactive Power Control test: whether check current conversion station Reactive Power Control performance satisfies code requirement.

Single converter cross-connection system system debug project:

The debugging scheme of described one pole double converter system comprises:

The major loop mode of connection of bipolar DC system is divided into the bipolar double converter mode of connection, two uneven converter wiring mode and the bipolar single converter mode of connection;

The debugging scheme of bipolar DC system comprises: the debugging scheme of the debugging scheme of the bipolar double converter mode of connection, the debugging scheme of two uneven converter wiring modes and the bipolar single converter mode of connection.

The debugging scheme of the bipolar double converter mode of connection comprises:

1. bipolar double converter direct current system plays/stops test:

2. utmost point tripping operation, the power transfer test:

3. power control test:

4. brownout operation test:

6. alternating current circuit Test to Failure:

7. Reactive Power Control test:

9. rated power and overload trial:

The debugging scheme of two uneven converter wiring modes comprises:

One) bipolar uneven converter direct current system plays/stops test:

Two) utmost point tripping operation, the power transfer test:

Three) power control test:

Four) Reactive Power Control test:

The debugging scheme of the bipolar single converter mode of connection comprises:

I, bipolar single converter direct current system play/stop test:

Ii, utmost point tripping operation, the power transfer test:

Iii, power control test:

(3) formulation ± 800kV extra-high voltage direct-current transmission engineering system debugging plan:

According to the on-the-spot current conversion station of DC engineering once with the concrete condition of secondary device performance, combine with computational analysis, and fully understand the characteristics of engineering and grasp on-the-spot actual conditions, build stage by stage according to engineering, formulate engineering system debugging scheme stage by stage.The system debug scheme is divided into system's single converter system debug project, monopolar DC system debugging and bipolar DC system debug-item; Be divided into low-power test project and high-power test project from direct current transmission power level; the low-power test project is mainly examined control protection and some other ilities of direct current system, the high-power test project mainly examine direct current system once with the secondary device performance.

(4) field adjustable that carries out of right ± 800kV extra-high voltage direct-current transmission engineering system is tested:

Organize DC engineering fielded system debugging test; The tracking computational analysis of field adjustable pilot project; The result analyzes to debugging test; Solve the various technical problems that occur in the test, the DC transmission engineering Technical properties of plant is provided evaluation.

(5) ± trial run of 800kV extra-high voltage direct-current transmission engineering system:

After the debugging of extra-high voltage direct-current engineering system is finished, assist the owner to write direct current system trial run scheme, for the owner provides direct current system trial run technological service, the problem of assisting the engineering owner that the trial run stage is occurred is analyzed, and solves the problem that occurs between trial run period.

(6) ± 800kV extra-high voltage direct-current transmission engineering system debugging summary:

The field adjustable data is put in order, filed; Extra-high voltage direct-current transmission engineering system debug results is analyzed, concluded; The report of system for writing and compiling debugging technique is analyzed and researched to debug results and conclusion, provides extra-high voltage direct-current transmission engineering system debugging conclusion.

Below with to tame dam to Shanghai ± 800kV extra-high voltage direct-current transmission engineering is example, extra-high voltage direct-current transmission engineering system adjustment method is described.

To tame dam-Shanghai ± 800kV extra-high voltage direct-current transmission engineering is China's article one ± 800kV ultra high voltage, high-capacity direct current power transmission engineering project.To tame dam-Shanghai ± the specified transmission power of 800kV extra-high voltage direct-current transmission engineering is 6400MW, direct current rated direct voltage ± 800kV; Rated direct current 4000A.This project is near the multiple imperial current conversion station Yibin, Sichuan Province, by way of Sichuan, Chongqing, Hubei, Hunan, Anhui, Jiangsu, Zhejiang and Shanghai eight provinces and cities, and the Fengxian current conversion station to the east of suburb, urban district, Shanghai, DC power transmission line total length 1907km.

Formulating to tame dam-will absorb during Shanghai extra-high voltage direct-current transmission engineering debug outline the experience of DC transmission engineering debugging such as Three Gorges-Changzhou, Three Gorges-Guangdong, and the characteristics of the Xiang Jiaba that combines closely-Shanghai DC transmission engineering, to guarantee satisfactorily finishing of engineering debug work.

Concrete steps are as follows:

1. write Xiang Jiaba-Shanghai DC transmission engineering system debug outline:

According to DC transmission engineering direct current major loop, secondary control protection equipment and alternating current equipment project organization and performance, determine the system debug content of DC transmission engineering and the framework of method; Frame content according to system debug, use for reference the experience of DC transmission engineering system debug in the past, system for writing and compiling debugging outline is determined the plan of system debug milestone, carry out the preceding preparation of system debug, data and engineering design technology standard and the research report of collecting connecting system.

2. the technology before the system debug is prepared:

2.1 the system safety stability analysis is calculated

2.1.1 study condition

(1) research level year and networking mode

The latest developments situation that the upwards direct current that provides according to the ultra high voltage Ministry of Construction is built estimated for the end of the year 2009, will finish the debugging of one pole station, will go into operation bipolar in 2010.Calculated data according to Electric Power Network Planning, has made up the simulation calculation data of North China～Central China～East China Power Grid in 2010 based on management and running in the end of the year 2009 mode data that state accent center provides.

The northeast electrical network links to each other with the North China electrical network back-to-back by high mountain range, and North China 1500MW is sent in northeast; Northwest Grid links to each other with Central China Power Grid by Lingbao City's direct current, Lingbao City's second phase, the precious direct current of moral, and Lingbao City's direct current send electric 1100MW altogether, and the precious direct current plan of moral send electrical power to be: the wet season is sent and send Central China 3000MW in northwest 1500MW, dry season.

North China and Central China Power Grid link to each other by ultra high voltage Changzhi～Nanyang～Jingmen Flow Line of singly backcrossing.

Central China and East China by Ge Nan, imperial political affairs, should link to each other by 3 times direct currents of China, East China 7200MW is sent in Central China.

(2) operational mode and load level

According to electrical network practical operation situation in 2009, consider 110kV and following small power supply and regional load balance after, determined North China in 2010, Central China, East China Power Grid stability Calculation analysis load level.

2010, North China electrical network calculated load was 113460MW, and the Central China Power Grid calculated load is 109450MW, and East China Power Grid is 132350MW; Sichuan Electric Power Network is 14500MW, and Shanghai Power Network is 20310MW.

In the calculating, the load level of waist mode and little mode calculated data is considered according to 75%, 50% of big mode respectively.

(3) stability Calculation main element model

1) generator excitation, speed governing, PSS model

Generator adopts detailed model, considers the influence of excitation system, governing system, and crucial unit installs the PSS device additional.Plan operation unit uses design parameter.

2) load model

Each component ratio of each network load model is as shown in table 1 below, and in the load model, the stator leakage reactance of induction motor adopts 0.18pu.

Each electrical network computational analysis of table 1 is with load model-look at table

(4) the fault clearance time

1) 500kV circuit three-phase permanent short fault: 0 second circuit generation three-phase permanent short fault, 0.09 second tripping fault side threephase switch, 0.1 second tripping offside threephase switch;

2) be total to stringing road N-2 fault with bar: 0 second circuit generation three-phase permanent short fault, 0.09 second tripping fault side threephase switch, 0.1 second tripping offside threephase switch is jumped another loop line simultaneously.

(5) stability criterion

The power system stability criterion is divided into angle stability, stable, three aspects of frequency stabilization of voltage.During computational analysis, if the three can both keep stable, then think system stability, if there is one can not stablize, then think system's instability, wherein when judging angle stability, if only the relative major network of indivedual little units loses synchronously, then still think system stability.Concrete criterion is as follows:

Angle stability: any two the unit relative angle swing curves after the system failure in same system are synchronous convergent oscillation;

Voltage is stable: after the fault clearance, the busbar voltage of main load-center substation can return to the operation allowed band, and the duration that the 500kV busbar voltage is lower than 0.75p.u. is no more than 1.0 seconds;

Frequency stabilization: system frequency continues operation near returning to rated frequency rapidly, not occurrence frequency collapse, and the system frequency after the accident can not be suspended in a certain too high or too low numerical value for a long time.

(6) computational tool

Adopt the PSD of China Electric Power Research Institute electric power system Software tool (PSD Power Tools) to finish, mainly contain:

1) PSD-BPA trend program

2) PSD-BPA transient stability program

2.1.2 research contents

According to direct current debugging scheme upwards, and coordinate debugging trend stability analysis experience in conjunction with the direct current of having gone into operation such as imperial political affairs, Jiang Cheng, the technical problem underlying that faces in the direct current debug system process has:

● the electric power tissue of the big load method of direct current and dissolving

● the voltage control under the little mode during direct current release

● system safety and mode during the direct current high-power test are arranged (conveying capacity)

● (temporarily) that need between limber up period to take pacifies control means

Estimate that Central China, East China Power Grid load will be above 100,000,000 kilowatts, and Chongqing of Sichuan, Shanghai Power Network scale also will be above 2,000 ten thousand kilowatts, possess stronger power supply tissue and the load ability of dissolving, direct current high-power test mode is only arranged 2～6 hour time.In general, select suitable opportunity and fit system arrangement by two big regional power grids, the electric power tissue can meet the demands, and principal contradiction will concentrate on network restriction and conveying capacity does not meet the demands.Because upwards the supporting power supply of direct current can not build up, it is very outstanding that this problem will become, and this report mainly conducts a research to this.

2.1.3 result of calculation:

To tame dam-Shanghai ± plan of 800kV extra-high voltage direct-current transmission demonstration project built up in 2010 and puts into operation, but supporting 500kV rack and all can not go into operation the same period to tame dam Hydropower Unit, near region grid structure weakness, this brings certain difficulty to engineering system debugging, needs to be equipped with automatic safety device, rationally arranges operational mode.By computational analysis, draw as drawing a conclusion and advising:

1) under tame dam not operation of unit condition, be that 10.9kA, capacity of short circuit are 9881MVA to tame dam current conversion station short circuit current,

Effectively short circuit ratio is 2.6; Nanhui current conversion station short circuit current is 50.4kA, and capacity of short circuit is 47640MVA, and effectively short circuit ratio is 14.4.The debugging of extra-high voltage direct-current engineering system can be carried out, but will pay close attention to the voltage stability of sending.

2) under the big load of one pole makes progress direct current 3200MW mode, answer and answer imperial change of current busbar voltage decline 7kV after imperial current conversion station excises one group of filter, voltage change ratio is 1.36%; Little load makes progress under the direct current 320MW mode, and multiple imperial current conversion station drops into multiple imperial change of current busbar voltage rising 10.2kV behind one group of filter, and voltage change ratio is near 2%, and voltage fluctuation is bigger, need arouse attention.

3) Shanghai and East China major network electrical link are tight, and transmission distance is short, and level of stability is higher, one pole locking failure system takes place during ultra high voltage one pole high-power test can keep synchronism stability; But Shanghai receiving end line voltage is on the low side.For guaranteeing carrying out smoothly of high-power test, suggestion is arranged in the waist mode and carries out; East China Power Grid should keep normal spinning reserve, improves electrical network and resists the fault ability.

4) make progress dry season during the full-load test of direct current one pole, take all factors into consideration factors such as electric power tissue, system stability level, reactive power, power 1000MW is sent in suggestion extra-high-voltage alternating current experiment and demonstration Job Scheduling south, Sichuan Electric Power Network is subjected to the about 1500MW of electricity from Central China major network, arranges the precious direct current of moral to send Sichuan 1500MW.

5) wet season makes progress during the full-load test of direct current one pole, and control Chongqing of Sichuan section is sent power outside in 3000MW, and avoids Chongqing of Sichuan section and the E Yu section mode that liquidates as far as possible; For avoiding because the security control device tripping causes extra-high-voltage alternating current experiment and demonstration engineering off-the-line, can consider to arrange in short-term extra-high-voltage alternating current experiment and demonstration engineering NORTEL south to send; The precious direct current of moral can send by the transaction plan.

6) upwards during the full-load test of direct current one pole, two units of mesa are completely sent out, and multiple imperial current conversion station drops into 9 groups of filter/capacitors.Studies show that the reactive voltage regulating measure of Sichuan Electric Power Network can satisfy the upwards pressure regulation requirement of direct current full-load test.

7) for guaranteeing upwards carrying out smoothly of direct current one pole full-load test, the peace control means that multiple imperial current conversion station near region need increase newly has:

● after the direct current one pole locking fault, excise two beaches, waterfall ditch power station 4～5 units altogether, parallel connection is cut Luzhou-multiple imperial sky and is filled circuit.

● after Great Gulch-Luzhou double loop N-1 fault, reduce making progress direct current power to 2500MW fast.

● after Great Gulch-Luzhou double loop N-2 fault, the locking direct current that makes progress, and unit of excision mesa.

● after Luzhou-multiple imperial three loop line N-2 faults, reduce making progress direct current power to 2000MW fast.

2.2 electromagnetic transient overvoltage calculates

Calculate content:

＜1〉DC side fault in the current conversion station comprises the overvoltage that current conversion station outlet and DC line middle part cause neutral bus fault, change of current change secondary side single phase ground fault etc. earth fault, high-low pressure valve Room high-pressure side exchange rheology secondary side lead wire fault, high-low pressure valve Room high-pressure side earth fault, high-low pressure valve Room high-pressure side.

＜2〉inversion side is lost the overvoltage that trigger impulse causes.

＜3〉drop into alternating current filter and capacitor group overvoltage.

＜4〉transient recovery voltage of alternating current filter and capacitor group circuit breaker fracture.

Alternating current-direct current side overvoltage when＜5〉current conversion station exchanges outlet earth fault.

＜6〉close the ac bus overvoltage that converter transformer causes.

＜7〉overvoltage that causes of Inverter Station load rejection.

Result of calculation (be example with Xiang Jiaba-Shanghai ± 800kV ultra high voltage high voltage direct current transmission project):

(1) under the DC bipolar operational mode, the overvoltage during DC line mid point generation earth fault on the DC line is the most serious, and the highest overvoltage appears at middle part, non-fault polar curve road along the line, and its amplitude is 1395kV; The overvoltage amplitude decreases when considering the overhead line structures earth resistance, and the overvoltage amplitude of corresponding 10 Ω earth resistances is 1359kV.

Except the overvoltage of DC line middle part, even more serious when current conversion station each point overvoltage level and lightning arrester energy consumption all are short-circuited fault with one pole metallic return operational mode.

(2) the bipolar or one pole emergency outage of direct current system, if control protection can correct operation, i.e. it is right that rectification sidesway phase inversion side is thrown bypass, and then both sides current conversion station alternating current-direct current side each point does not have obvious overvoltage during the converting plant emergency outage, and lightning arrester is action all; During inversion side emergency outage, only Inverter Station neutral bus lightning arrester action, both sides other each point of current conversion station alternating current-direct current side does not all have obvious overvoltage, and corresponding lightning arrester is not action also.

(3) converter valve is lost under the 100ms trigger impulse situation continuously, and all in allowed band, all lightning arrester energy consumptions are all in tolerance interval for the overvoltage level of all devices.

(4) inversion side is not thrown bypass to very little to the influence of rectification side emergency outage, can not produce obvious overvoltage in the alternating current-direct current side, and each lightning arrester also can not move.The inversion side is not thrown bypass to bigger to the influence of inversion side emergency outage.Do not throw under the situation of bypass to the normal phase shift of rectification side in the inversion side, the outlet of inversion side direct current, valve top and neutral bus valve side all higher overvoltage can occur, and corresponding lightning arrester energy consumption is also very big.

When (5) dropping into alternating current filter and capacitor group, if phase selection device regular event, can limit the impact that making process produces at filter or each element of capacitor group, and can reduce closing operation to the disturbance of system, the lightning arrester in the making process on each filter and the capacitor group is not action all.

(6) if the phase selection device is failed regular event, namely quite adopting at random, the combined floodgate mode drops into filter or capacitor group, switching overvoltage is up to 1.54p.u. (p.u. is perunit value) on the current conversion station 500kV bus of both sides, and filter bus lightning arrester is not action all; The relevant lightning arrester action of filter or capacitor group, but energy consumption level is all not high.

(7) normally move at direct current, under the different operating conditions such as bipolar emergency outage, both sides current conversion stations excision big group filter or excise each group's filter respectively and capacitor group process in, the fracture transient recovery voltage maximum of circuit breaker is lower than 1500kV, and the fracture recovery voltage steepness maximum of circuit breaker is lower than 0.4kV/ μ s.

(8) all drop into as each filter and capacitor group, the steady-state current that flows through each big group of circuit breaker has all surpassed the 700A(effective value), and the maximum capacitive electric current that present 500kV AC circuit breaker can be cut-off only is the 500A(effective value), therefore should not be by big group of circuit breaker action surgical filtering device and capacitor group.

(9) multiple dragon or Fengxian current conversion station drop into one group of filter before the direct current release, current conversion station ac bus line voltage rise respectively about 11kV or 3.5kV.For guaranteeing that current conversion station ac bus voltage is no more than the 550kV setting, drop into the preceding multiple dragon of filter or Fengxian current conversion station ac bus voltage and should control respectively at 535kV or below the 540kV.

Multiple dragon or Fengxian current conversion station drop into one group of filter during the operation of direct current one pole, current conversion station ac bus line voltage rise respectively about 6kV or 2.5kV, for guaranteeing that current conversion station ac bus voltage is no more than the 550kV setting, both sides current conversion station ac bus voltage should be controlled below 540kV.

(10) the corresponding alternating current filter of excision behind direct current one pole or the bipolar emergency outage 100ms, Fengxian current conversion station ac bus line voltage is lower than 550kV, and multiple imperial current conversion station ac bus line voltage will be regulated by the sending end electrical network and be down to below the 550kV.

(11) current conversion station 500kV in both sides resonance overvoltage all do not occur after exchanging outlet single-phase earthing and fault clearance.Overvoltage amplitude and lightning arrester energy consumption that single phase ground fault causes at both sides 500kV change of current bus, multiple dragon is respectively 1.81p.u. and 1937kJ, and the Fengxian side is respectively 1.68p.u. and 66kJ.

Single phase ground fault is at multiple imperial current conversion station HP3 filter capacity C ₁And inductance L ₁The temporary overvoltage that two ends cause height during than input coefficient reaches 1024kV(2.28p.u. respectively) and 448kV(1.00p.u.); Overvoltage amplitude on other filter, each element of capacitor group is close with the numerical value in their input processes or slightly high.

Current conversion station exchanges the outlet single phase ground fault can produce the very high overvoltage of amplitude at the converter valve two ends, and multiple dragon is respectively 422kV and 378kV with the Fengxian side, and the lightning arrester maximum energy consumption is respectively 3328kJ and 529kJ.

Do not occur tangible resonance overvoltage when (12) multiple dragon and Fengxian current conversion station close converter transformer, current conversion station 500kV ac bus lightning arrester is not action all.Direct current one pole when operation, big when dropping into overvoltage that an other utmost point converter transformer produces and magnetizing inrush current amplitude than the DC bipolar locking, but do not cause direct current normally to move utmost point generation commutation failure.

2.3 system for writing and compiling debugging computational analysis report

According to the system-computed result, system for writing and compiling debugging computational analysis report is as the technical foundation of system for writing and compiling debugging scheme and executive system debug-item.

The main contents of 3, system debug scheme: the end-to-end system debugging is divided into single converter, one pole double converter system debug project and bipolar DC system debugging.

± 800kV extra-high voltage direct-current transmission engineering system debugging scheme is divided into one pole single converter system debug scheme, one pole double converter system debug scheme and bipolar DC system debugging scheme.When establishment fielded system debugging embodiment, system debug scheme and pilot project under 3 types the wiring operational mode considering to propose previously.Because all the system debug pilot projects under 3 types the wiring operational mode are more, so, when arranging the fielded system debugging test, will be optimized combination research to pilot project, establishment fielded system debugging implementation plan.

3.1 single converter system debug

3.1.1 single converter system debug project

(1) initial launch test, power just send/counter sending.The initial launch test comprises that power is just sending pilot project and anti-power delivery pilot project.

1) power is just sending pilot project to be:

The initialization operation test, big earthed return operation.

Converter rises/stops, manual block.

The control system manual switchover.

The emergency outage test.

The analog quantity input signal checks:

Converter control, utmost point control and bipolar control analog quantity input signal check;

DC side protection analog quantity input signal checks;

Exchanging side protection analog quantity input signal checks.

The initialization operation test, metallic return operation: repeat above content of the test.

2) the anti-power delivery pilot project is:

The utmost point rises/stops.

The emergency outage test.

There is not communication, the emergency outage test.

The analog quantity input signal checks.

Utmost point control analog quantity input signal checks.

The initialization operation test, anti-power delivery, metallic return.

Repeat above pilot project.

The purpose of such test be power just giving and the anti-condition of giving a present under, under the different modes of connection, carry out converter starting/stoppage in transit, control system manual switchover, emergency outage, the inspection of analog quantity input signal.Be noted that especially in test: the polarity of check protection and definite value cooperate; Confirm the emergency outage function, in order in debug process, in case of emergency can guarantee the person and device security immediately with DC system locking.This type of test can be carried out under underload.

(2) power just send, the protection trip test.The protection trip test comprises that power is just sending pilot project and anti-power delivery pilot project.

1) power is just sending pilot project to be:

Communication is arranged, converting plant analog valve short trouble protection tripping operation locking;

Communication is arranged, and converting plant simulation converter valve detects protection tripping operation locking;

Communication is arranged, converting plant simulation converter overcurrent protection tripping operation locking;

Communication is arranged, converting plant simulation converter differential protection tripping operation locking;

Do not have communication, trigger impulse protection tripping operation locking is lost in the converting plant simulation;

There is not communication, converting plant simulation wide-angle monitor protection tripping operation locking;

Communication is arranged, Inverter Station analog DC overvoltage protection tripping operation locking;

Communication is arranged, and Inverter Station simulation converter valve detects protection tripping operation locking;

Communication is arranged, Inverter Station simulation overcurrent protection tripping operation locking;

Communication is arranged, Inverter Station simulation converter differential protection tripping operation locking;

There is not communication, Inverter Station analog valve short-circuit protection tripping operation locking;

There is not communication, Inverter Station simulation converter overcurrent protection tripping operation locking;

Rectification side valve cooling system failure starting tripping operation;

Inversion side valve cooling system failure starting tripping operation;

The purpose of protection trip test is under direct current power is just being given condition a present; dc system protection function, sequential control function are verified; and exchange energising and the physical processes such as outage, converter deblocking and locking of side by converter; monitoring has or not the operating condition of overvoltage, overcurrent phenomenon and surveillance equipment, verifies the correctness of system's start-stop process under various DC control patterns and the operational mode and the correctness of dc system protection function.

(3) steady operation, power just send.

1) system monitoring function test project:

The effective system power failure;

Analog DC line fault (only in converting plant);

Simulation framework cpu fault and the test of detection host CPU load factor.

2) data/address bus fault.

3) control bus fault.

The purpose of this test is the requirement whether monitoring function of check direct current system satisfies the functional specification book.

(4) steady operation, the associating Current Control, power just send.Steady operation, the test of associating Current Control comprises that power is just sending pilot project.

1) power is just sending pilot project to be:

Electric current lifting/lowering and stop lifting/lowering;

Control system is switched in the electric current lifting/lowering process;

Master station/select from the control station;

Change of current variation connects switch control, manually changes position of tapping switch;

The test of current-order step;

The voltage instruction step;

Close the angle of rupture (γ) step;

The control model conversion, inverter control electric current and current-order step.

(5) normal operation, joint Power control, power just send.Low-power is normally moved, and joint Power control test comprises that power is just sending pilot project.

1) power is just sending pilot project to be:

Converter starting/stop transport;

The power lifting/lowering;

In the power lifting process, carry out system and switch;

The power instruction step;

During communication failure, carry out the test of power lifting/lowering;

The pattern conversion, inversion side control electric current;

Be transformed into the associating Current Control.

Low-power steady operation, power just send, the purpose of joint Power control test is the performance of check direct current system control system under power control mode, comprise the check of control performances such as utmost point start-stop, power lifting, control system switching, control model conversion, dynamic performance and automatic trend counter-rotating.

3) high-power operation, power just send, and joint Power control pilot project is: utmost point starting, utmost point power control operation, change of current variation connects switch control, manual adjustments shunting switch.The purpose of this test is whether the start-stop of the check utmost point, direct current system power lifting process when high-power operation have disturbance, is to primary equipment and the test of secondary control protection equipment.

(6) low power run, power just send/counter sending, and carry out separate current control test during communication failure.Normal operation, power just send, carry out independent Current Control test during communication failure comprises that power is just sending pilot project.

1) power is just sending pilot project to be:

Converter starting/stop transport;

The emergency outage test;

The electric current lifting/lowering;

In the electric current lifting process, carry out system and switch;

Be transformed into and jointly control/power control.

The purpose that low power run, power just send, carry out independent Current Control test during communication failure is the check direct current system in communication failure, the performance of control protection system under the current control mode separately, comprises that utmost point start-stop, emergency outage, electric current lifting, control system switchings, control model conversion etc. control the check of protective values.

(7) Reactive Power Control.The Reactive Power Control test is divided into low-power test project and high-power test project.The low-power test project is checking Reactive Power Control performance.

1) the low-power test project is:

The manual switching filter;

The filter demand;

Filter switches;

Idle control;

Voltage control.

The high-power test project is divided into again that power just send, Reactive Power Control and anti-power delivery, Reactive Power Control pilot project.The purpose of these tests are checking direct current systems power just giving and the anti-condition of giving a present under, whether reactive power and alternating current filter switching order satisfies the requirement of functional specification book.

2) the high-power test project is:

Reactive Power Control, big earthed return;

Idle control, metallic return;

Idle control, metallic return, brownout operation;

Voltage control, big earthed return;

Voltage control, metallic return;

Voltage control, metallic return, brownout operation.

3) Reactive Power Control, anti-power delivery (high-power test) pilot project is:

Big earthed return mode, Reactive Power Control;

The metallic return mode, Reactive Power Control;

Reactive Power Control, metallic return and brownout operation.

(8) the earth/metallic return transfer test.The earth/metallic return transfer test is divided into low-power test project and high-power test project.

The purpose of low-power test project is that the checking direct current is transformed into metallic return and is transformed into earth electrode from metallic return from earth electrode; whether direct current system is moved normally, and checks metallic return change over switch (MRTB) and whether the switching sequence operation is normal, whether check valve protection loop works is normal.

The purpose of high-power test project be except check whether the operation of metallic return change over switch (MRTB) and switching sequence normal, check valve protection loop works whether normal, mainly be the ability of check metallic return change over switch (MRTB) and oscillation circuit thereof blocking direct current, comprise: the earth/metallic return conversion (low-power); The earth/metallic return conversion (middle power); Metallic return, ground network ground connection operation test in the Inverter Station utilization station; The earth/metallic return conversion (rated current or rated power).

(9) pulse-losing test, power just send/counter sending.Pulse-losing test, power just send/and instead send test to comprise that power is just sending pilot project and anti-power delivery pilot project.

1) power is just sending pilot project to be:

Big earthed return, the inversion side is lost individual pulse;

Big earthed return, the inversion side is lost a plurality of pulses (greater than 5);

Metallic return, the inversion side is lost individual pulse;

Metallic return, inversion side are lost a plurality of pulses (greater than 5);

Metallic return, the rectification side is lost individual pulse;

Metallic return, rectification side are lost a plurality of pulses (greater than 5);

Metallic return, inversion side are lost a plurality of pulses (greater than 5), do not have communication;

Metallic return, rectification side are lost a plurality of pulses (greater than 5), do not have communication.

2) the anti-power delivery pilot project is:

Big earthed return, the inversion side is lost individual pulse;

Metallic return, the inversion side is lost individual pulse;

Metallic return, inversion side are lost a plurality of pulses (greater than 5).

The purpose of test is the stability of access control system between the trigger impulse age at failure, checks that direct current system contingency is in resonance or near under the fundamental resonance situation, control can not amplified vibration.Can the continuous commutation failure protection of test valve and fundamental frequency, second harmonic protection simultaneously correct operation, and checks whether other protection misoperation tripping operation is arranged, and whether direct current system satisfies demand of technical standard recovery time behind commutation failure.

(10) upset test, power just send.Upset test, power are just sending pilot project to comprise:

The DC line fault test.

Earth electrode line fault.

The interchange accessory power supply switches.

The dc auxiliary supply fault:

Direct current system A110V/220V power failure;

Direct current system B110V/220V power failure;

Direct current system C110V/220V power supply switches.

The purpose of DC line fault test is check route protection sequential, and the temporary transient loss of observation direct current power is to the influence of AC system, simultaneously according to recovery time behind the technical specification book verification dc system fault, verification DC line fault position indicator.

The purpose of simulation neutral bus Test to Failure is whether the check neutral bus protects correct operation, and the monitoring neutral bus has or not the operating condition of overvoltage, overcurrent phenomenon and surveillance equipment.

The purpose that loses the redundance unit test is that the switching of checking redundant element is steady, to the no big disturbance of direct current power transmission.

The purpose of earth electrode line fault test is the performance of verification earth electrode pilot protection.

Two the ground electrode circuit protective functions that it should be noted that upwards extra-high voltage direct-current engineering design, one be the earth electrode impedance protection, its energy protective earthing polar curve road total length; Another is earth electrode line current unbalance protection (earth electrode circuit transverse differential protection), 1/2～2/3 of its energy protective earthing polar curve road total length.The purpose of earth electrode line fault test is that can these two protections of check the correct operation alarm.

The purpose of charged switching DC filter test is whether the charged switching DC filter of check is influential to the direct current system operation.

(11) the additional control test of direct current system.The additional control of direct current system pilot project comprises:

Power ascension and power return and fall test;

Simulate abnormal alternating voltage and FREQUENCY CONTROL;

Analog-modulated control;

It is that the check direct current system can change through-put power by predefined power definite value and elevation rate that power ascension and power return the purpose of falling test, in order to cooperate with system stable device in the future.

The purpose of simulating unusual alternating voltage and frequency change control test is that check direct current system transmission power can respond to the voltage of AC system and the ANOMALOUS VARIATIONS of frequency.Can utilize this function to suppress the possible voltage of AC system and frequency change.

The test of simulated power modulation function is whether the check direct current system changes corresponding with the polarity of modulation signal variation to external modulation signal respond and direct current power.

(12) operating operation test on this locality/distant place control conversion and the reserve face.The operation pilot project comprises on this locality/distant place control conversion and the reserve face:

1) this locality/distant place control transfer test:

Test is controlled/is stopped in a distant place;

The test of distant place control one pole power lifting/lowering.

2) operate at the reserve face:

Converter plays/stops test;

The test of single converter power lifting/lowering.

The purpose of this test is whether the start-stop of check a distant place control (control centre) and standby face (PCP rack) the operation utmost point, electric current (power) lifting be normal.

(13) hot operation test.Hot operation test and overload trial project comprise:

1) project that in hot operation test process, will measure:

Equivalent disturbing current (Ieq) detects;

AC harmonic (THFF) detects;

Radio interference is measured;

Audible noise measuring;

The auxiliary system of standing power loss is measured;

The earth electrode test.

2) power is the hot operation test of 1.00p.u, big earthed return, and standby cooling does not put into operation.

3) tap control is manually controlled tap and is changed.

4) power is the hot operation test of 1.00p.u, metallic return, and standby cooling does not put into operation.

5) power 1.10p.u running overload test.

3.1.2 single converter cross connect system debugging scheme

(1) initial launch test, power just send.

The initialization operation test, big earthed return operation.

Converter rises/stops, manual block.

The control system manual switchover.

The emergency outage test.

The analog quantity input signal checks:

DC side protection analog quantity input signal checks;

Exchanging side protection analog quantity input signal checks.

(2) initialization operation test, the metallic return operation.

Repeat above content of the test.

The purpose of such test is under power is just being given condition a present, carries out converter starting/stoppage in transit, control system manual switchover, emergency outage, the inspection of analog quantity input signal under the different modes of connection.Be noted that especially in test: the polarity of check protection and definite value cooperate; Confirm the emergency outage function, in order in debug process, in case of emergency can guarantee the person and device security immediately with DC system locking.This type of test can be carried out under underload.

3.1.3 single converter system debug test event

In system debug, the main test event that need carry out has:

(1) test of direct current system running status amount.Whether the various operation conditionss of checking direct current system meet code requirement.

(2) test of AC system running status amount.Under various direct current debugging working condition, current conversion station is exchanged side critical quantity such as alternating voltage, alternating current, meritorious and reactive power, frequency etc. monitor, observe direct current system to the influence of AC system.

(3) overvoltage test, whether checking current conversion station and the design of DC line insulation coordination meet code requirement.

(4) alternating current-direct current harmonic wave test, whether checking alternating current-direct current harmonic performance meets code requirement.

(5) noise and electromagnetic environment influence test, whether the verification environment influence meets code requirement.

(6) earth electrode test, whether the distribution of checking grounding electrode electric current, step voltage, touch voltage and earth electrode conductor temperature meet code requirement.

3.2 one pole double converter system debug

3.2.1 one pole double converter system debug project

1) power is just sending pilot project to be:

The initialization operation test, big earthed return operation.

One pole rises/stops, manual block.

The control system manual switchover.

The emergency outage test.

The analog quantity input signal checks:

Utmost point control analog quantity input signal checks;

DC side protection analog quantity input signal checks;

Exchanging side protection analog quantity input signal checks.

2) the anti-power delivery pilot project is:

The utmost point rises/stops.

The emergency outage test.

There is not communication, the emergency outage test.

The analog quantity input signal checks.

Utmost point control analog quantity input signal checks.

The initialization operation test, anti-power delivery, metallic return.

Repeat above pilot project.

The purpose of such test be power just giving and the anti-condition of giving a present under, under the different modes of connection, carry out utmost point starting/stoppage in transit, control system manual switchover, emergency outage, the inspection of analog quantity input signal.Be noted that especially in test: the polarity of check protection and definite value cooperate; Confirm the emergency outage function, in order in debug process, in case of emergency can guarantee the person and device security immediately with DC system locking.This type of test can be carried out under underload.

(2) power just send, the protection trip test.

1) power is just sending pilot project to be:

Communication is arranged, converting plant analog DC overvoltage protection tripping operation locking;

Communication is arranged, converting plant ground electrode circuit protective tripping operation locking;

Communication is arranged, the analog DC utmost point bus differential protecting tripping operation Z of converting plant locking;

Communication is arranged, the moving protection tripping operation of converting plant analog DC extreme difference locking;

There is not communication, converting plant simulation alternating current-direct current short protection tripping operation locking;

There is not communication, the moving protection tripping operation of converting plant analog DC extreme difference locking;

Communication is arranged, Inverter Station analog DC harmonic protection tripping operation locking;

Communication is arranged, Inverter Station simulation converter connecting line differential protection tripping operation locking;

There is not communication, the protection tripping operation locking of Inverter Station analogue ground polar curve road;

There is not communication, Inverter Station analog DC utmost point bus differential protecting tripping operation locking;

Communication is arranged, simulate high-end converter valve short-circuit protection, converting plant utmost point protection tripping operation locking;

Communication is arranged, and converting plant simulation bypass is to the overload protection locking of tripping;

Communication is arranged, and high-end converter bypass cock protection tripping operation locking is simulated by converting plant;

Communication is arranged, and high-end converter differential protection is simulated by converting plant, utmost point protection tripping operation locking;

(3) steady operation, power just send.

1) system monitoring function test project:

The effective system power failure;

Analog DC line fault (only in converting plant);

Simulation framework cpu fault and the test of detection host CPU load factor.

2) data/address bus fault.

3) control bus fault.

(4) steady operation, the associating Current Control, power just send.

1) power is just sending pilot project to be:

Electric current lifting/lowering and stop lifting/lowering;

Control system is switched in the electric current lifting/lowering process;

Master station/select from the control station;

The test of current-order step;

The voltage instruction step;

Close the angle of rupture (γ) step;

Above pilot project is carried out when low power run.In addition, this type of test also comprises following high-power test project.

1) power is just sending pilot project to be:

Utmost point starting/stop transport;

The power lifting/lowering;

In the power lifting process, carry out system and switch;

The power instruction step;

During communication failure, carry out the test of power lifting/lowering;

The pattern conversion, inversion side control electric current;

Be transformed into the associating Current Control.

Low-power steady operation, power just send, the purpose of joint Power control test is the performance of check direct current system control system under power control mode, comprise the check of control performances such as utmost point start-stop, power lifting, control system switching, control model conversion, dynamic performance.

3) high-power operation, power just send, and joint Power control pilot project is: utmost point starting and utmost point power control operation.The purpose of this test is whether the start-stop of the check utmost point, direct current system power lifting process when high-power operation have disturbance, is to primary equipment and the test of secondary control protection equipment.

(6) low power run, power just send, and carries out separate current control test during communication failure.Normal operation, power just send, carry out independent Current Control test during communication failure comprises that power is just sending pilot project.

1) power is just sending pilot project to be:

Utmost point starting/stop transport;

The emergency outage test;

The electric current lifting/lowering;

In the electric current lifting process, carry out system and switch;

Be transformed into and jointly control/power control.

(7) low-power, normal voltage/brownout operation, power just send.

1) power is just sending pilot project to be:

Manually with protection starting drop test;

The power/current lifting;

Sub-connecting switch of transformer control manually changes position of tapping switch;

The power instruction step;

Communication failure;

Be transformed into the associating Current Control;

The current-order step.

The reason of design DC decompression operation function is in order to continue operation under DC line insulator contamination situation.Brownout operation can be by the control of DC line fault processing sequence or by operations staff's manual starting.

Low-power is just sent; the purpose of normal voltage/brownout operation test is the check direct current system is controlled protection system under the brownout operation mode performance, comprises that manual starting and protection starting step-down, change of current variation connect the check of control protective values such as switch control, direct current power/electric current lifting, control model conversion, communication failure disturbance and dynamic performance.

3) high-power operation, total head/brownout operation, power are just sending pilot project to be: manually with protection starting drop test.

Power just send; the purpose of normal voltage/brownout operation test is that direct current system is when high-power operation; check manual starting and protection starting step-down control protective value and system have or not overvoltage and overcurrent phenomenon to occur with the impact of very high speed step-down to primary equipment.

The brownout operation test should be able to have not have under the dual mode of communicating by letter between communication and station between standing to be carried out.

(8) Reactive Power Control.The Reactive Power Control test is divided into low-power test project and high-power test project.The low-power test project is checking Reactive Power Control performance.

1) the low-power test project is:

The filter demand;

Filter switches;

Idle control;

Voltage control.

The high-power test project is divided into again that power just send, the Reactive Power Control pilot project.The purpose of these tests is to verify direct current system under power is just being given condition a present, and whether reactive power and alternating current filter switching order satisfy the requirement of functional specification book.

2) the high-power test project is:

Reactive Power Control, big earthed return;

Idle control, metallic return;

Idle control, metallic return, brownout operation;

Voltage control, big earthed return;

Voltage control, metallic return;

Voltage control, metallic return, brownout operation.

(9) pulse-losing test, power just send.

1) power is just sending pilot project to be:

Big earthed return, the inversion side is lost individual pulse;

Metallic return, the inversion side is lost individual pulse;

Metallic return, the rectification side is lost individual pulse;

(10) upset test, power just send.

The DC line fault test.

The interchange accessory power supply switches.

The DC filter switching.

The dc auxiliary supply fault:

Direct current system A110V/220V power failure;

Direct current system B110V/220V power failure;

Direct current system C110V/220V power supply switching tests.

Power ascension and power return and fall test;

Simulate abnormal alternating voltage and FREQUENCY CONTROL;

Analog-modulated control;

1) this locality/distant place control transfer test:

Test is controlled/is stopped in a distant place;

The test of distant place control one pole power lifting/lowering.

2) operate at the reserve face:

Rise/stop test;

The test of one pole power lifting/lowering.

(13) hot operation test.Hot operation test and overload trial project comprise:

1) project that in hot operation test process, will measure:

Equivalent disturbing current (Ieq) detects;

AC harmonic (THFF) detects;

Radio interference is measured;

Audible noise measuring;

The auxiliary system of standing power loss is measured;

3) power is the hot operation test of 1.00p.u, metallic return, and standby cooling does not put into operation.

3.2.2 monopolar DC system debugging test event

In system debug, the main test event that need carry out has:

3.3 bipolar DC system debugging

Before carrying out bipolar low power system test, the corresponding single converter in two stations and one pole test should all be finished.

3.3.1 bipolar double converter system debug project

(1) initialization operation, power just send/counter sending.Initialization operation, power just send/and instead send test to comprise following pilot project:

Bipolarly rise simultaneously/stop, manual block, power just send;

Rectification side manual emergency is stopped transport, and power just send;

Inversion side manual emergency is stopped transport, and power just send;

Bipolarly rise simultaneously/stop, manual block, anti-power delivery;

Rectification side manual emergency is stopped transport, anti-power delivery;

Inversion side manual emergency is stopped transport, anti-power delivery.

The function that the starting of checking bipolar DC system and stoppage in transit and protection action are stopped transport.

The purpose of this test is the basic start-stop function of checking direct current system when normal and no communication, and direct current system sequential control function verified, check the emergency outage function, in order in debug process, in case of emergency can guarantee the person and device security immediately with DC system locking.

This test is carried out under bipolar low power run situation.

(2) utmost point compensation, ownership shifts, and power just send.This test mainly be checking under electric current, power control mode with have or not that direct current system can normally rise/stop and stable operation when communicating by letter, performances such as utmost point power back-off, extremely charged and grounding electrode electric current balance.

This project can together be verified grounding electrode electric current balance quality in (5).

(3) automatic/hand control, power just send.Manually control direct current power lifting test is that can direct current power and electric current finish power, electric current lifting according to preestablishing power, current ration and rate of change under the checking DC bipolar operational mode.

Automatically the purpose of control direct current power lifting test is that can direct current power and electric current change according to predefined power change curve (comprising preset value and rate of change) under the check DC bipolar operational mode.

This pilot project is also carried out under bipolar high-power operational mode except carrying out under bipolar low power run.Whether checking power lifting process and steady operation have disturbance, also are the examinations to secondary device control performance and primary equipment performance.

When testing, manually the lifting of control power is finished in other test, so in this project test, only control direct current power lifting test automatically, consider that this test mainly is the performance of checking DC control system, so can consider only under bipolar low power run mode, to carry out this test.

(4) utmost point tripping operation, power back-off, power just send.This test had both comprised that bipolar low-power test also comprised bipolar high-power test project, the purpose of test is the steady operation of checking DC bipolar, an one pole emergency outage, direct current power should be transferred to an other utmost point, and the power transfer time should be satisfied the 80ms of demand of technical standard.

Consider that this test mainly is the performance of checking DC control system, so can consider only under bipolar low power run mode, to carry out this test.

(5) earth electrode balance.The purpose of this test checks direct current system exactly under bipolar operational mode, and grounding electrode electric current should be checked in direct current system under bipolar operational mode simultaneously less than 40A, and whether two stations utilize the interior ground network ground connection start-stop in station and move normal.This test comprises following pilot project: the earth electrode balance test; Ground network ground connection start-stop test in converting plant and the Inverter Station utilization station.

The earth electrode balance test is finished with (2).

According to the configuring condition of the configuration of the dc fields switch of converting plant and Inverter Station and earth electrode, can utilize between turn(a)round at earth electrode that earthed switch ground connection keeps bipolar steady operation in the current conversion station.

(6) brownout operation, power just send.This test had both comprised that bipolar low-power test also comprised bipolar high-power test project, and the purpose of test mainly is in order to continue operation under DC line insulator contamination situation.Brownout operation can be by the protection starting or by operations staff's manual starting.

The bipolar brownout operation characteristic of brownout operation test check.When direct current system under brownout operation control, during direct voltage instruction lifting, check reactive power or alternating voltage control action situation.

The high-power operation of direct current system, the brownout operation pilot project is as follows: the utmost point 1 brownout operation; The utmost point 2 brownout operations.

Whether the control protective value of bipolar low-power brownout operation main test direct current system satisfies the requirement of technical specification book.Bipolar high-power brownout operation is mainly verified secondary device control performance and primary equipment performance, and verification exchanges the switching order of reactive-load compensation equipment, and examines a utmost point brownout operation, another utmost point overload characteristic.

(7) upset test, power just send.

Rectification side joint earth polar line fault;

Inversion side joint earth polar line fault;

Analogue ground polar curve road open circuit, utmost point trip test;

The alternating current circuit fault.

Earth electrode circuit open circuit, two functions of utmost point trip test main test, the one, the bipolar operation of direct current system, analog DC earth electrode circuit open circuit, earthed switch NBGS can be correct closed in standing; The 2nd, under the earthed switch NBGS ground state, the one pole fault trip is simulated in bipolar starting in the station, and another utmost point is tripping operation thereupon also.

The purpose of alternating current circuit earth fault test mainly is after checking is broken down, the response condition of DC control protection system, and can direct current transmission power recover in official hour reposefully.In the time of simultaneously can examining fault in ac transmission system, AC system relaying protection performance, the operation stability of whole ac and dc systems after the understanding AC system breaks down.

(8) the additional control test of direct current system.Bipolar operation, power just send, and the additional control of direct current system pilot project is as follows:

Power ascension/power returns and falls;

Simulation AC system exception FREQUENCY CONTROL;

(simulated power modulation control) modulus signal additional control function test.

Bipolar operation, the purpose of the additional control test of direct current system is identical when moving with the direct current system one pole, just the difference of one pole operation and bipolar operation.

(9) this locality/far-end control conversion and operating operation test of reserve face, power just send.

1) this locality/distant place control transfer test:

Rise/stop test;

The test of bipolar power lifting/lowering.

2) operate at the reserve face:

Rise/stop test;

The test of bipolar power lifting/lowering.

Bipolar operation, this locality/identical when distant place control conversion moves with the direct current system one pole with the purpose of reserve face operating operation test, the just difference of one pole operation and bipolar operation.

(10) Reactive Power Control.Bipolar operation, power just send, and the Reactive Power Control pilot project is as follows:

1) power just send, Reactive Power Control:

The Q-pattern;

The U-pattern.

Test objective is to check direct current system under high-power ruuning situation, the performance of reactive power and voltage control control and the switching order of filter.By high-power test, verified the Reactive Power Control performance.

(11) the hot operation test of rated power.

1) project that in hot operation test process, will measure:

I _EqCheck;

THFF checks;

Interferometry;

Audible noise checks;

The auxiliary equipment of standing power loss is measured.

2) hot operation test:

Bipolar heat operation;

Bipolar 1.0p.u. rated load operation test;

The Reactive Power Control test.

3) brownout operation, hot operation test.

Check the ability to transmit electricity of equipment under the hot running status of bipolar rated power, comprise direct current conveying rated load, brownout operation and direct current system capability of overload.

It is longer that big duration of load application is kept in this test, tests the equipment temperature rise, checks the through-current capability of whole direct current system; Check the stable state parameter (Ud, Id, Pd, Q, α, β, the change of current become tap position, alternating current filter input group number etc.) of whole direct current system, the temperature of test valve cooling water, capital equipment and bus contact should be carried out the alternating current-direct current harmonic measure simultaneously at this duration of test simultaneously; Audible noise measuring, test of electromagnetic disturbance.Check it whether to satisfy code requirement.

Before and after hot operation test, the oil in reply change of current change, smoothing reactor (oil immersed type) and the sleeve pipe (oil-filled type) thereof carries out chromatography, the variation of gas contents such as monitoring acetylene.

3.3.2 bipolar uneven inverter system debug-item

Bipolarly rise simultaneously/stop, manual block, power just send;

Rectification side manual emergency is stopped transport, and power just send;

Inversion side manual emergency is stopped transport, and power just send;

Bipolarly rise simultaneously/stop, manual block, anti-power delivery;

Rectification side manual emergency is stopped transport, anti-power delivery;

Inversion side manual emergency is stopped transport, anti-power delivery.

This test is carried out under bipolar low power run situation.

(2) utmost point compensation, ownership shifts, and power just send.This test mainly be checking under electric current, power control mode and when having or not communication direct current system can normally rise/stop and stable operation, performances such as utmost point power back-off, extremely charged and grounding electrode electric current balance.

(3) utmost point tripping operation, power back-off, power just send.This test comprises bipolar low-power test pilot project, and the purpose of test is the steady operation of checking DC bipolar, an one pole emergency outage, and direct current power should be transferred to an other utmost point, and the power transfer time should be satisfied the 80ms of demand of technical standard.

(4) earth electrode balance.The purpose of this test checks direct current system exactly under bipolar operational mode, and grounding electrode electric current should be checked in direct current system under bipolar operational mode simultaneously less than 40A, and whether two stations utilize the interior ground network ground connection start-stop in station and move normal.This test comprises following pilot project: the earth electrode balance test; Ground network ground connection start-stop test in converting plant and the Inverter Station utilization station.

(5) the additional control test of direct current system.Bipolar operation, power just send, and the additional control of direct current system pilot project is as follows:

Power ascension/power returns and falls;

3.3.3 bipolar single converter system debug project

Bipolarly rise simultaneously/stop, manual block, power just send;

Rectification side manual emergency is stopped transport, and power just send;

Inversion side manual emergency is stopped transport, and power just send;

Bipolarly rise simultaneously/stop, manual block, anti-power delivery;

Rectification side manual emergency is stopped transport, anti-power delivery;

Inversion side manual emergency is stopped transport, anti-power delivery.

This test is carried out under bipolar low power run situation.

(3) utmost point tripping operation, power back-off, power just send.This test comprises bipolar low-power test, and the purpose of test is the steady operation of checking DC bipolar, an one pole emergency outage, and direct current power should be transferred to an other utmost point, and the power transfer time should be satisfied the 80ms of demand of technical standard.

(5) upset test, power just send.Power is just sending pilot project as follows:

Rectification side joint earth polar line fault;

Inversion side joint earth polar line fault;

The alternating current circuit fault.

(6) the additional control test of direct current system.Bipolar operation, power just send, and the additional control of direct current system pilot project is as follows:

Power ascension/power returns and falls;

Simulation AC system exception FREQUENCY CONTROL;

(7) this locality/far-end control conversion and operating operation test of reserve face, power just send.This locality/distant place control conversion and reserve face operating operation test project are as follows:

1) this locality/distant place control transfer test:

Rise/stop test;

The test of bipolar power lifting/lowering.

2) operate at the reserve face:

Rise/stop test;

The test of bipolar power lifting/lowering.

(8) the hot operation test of rated power.

1) project that in hot operation test process, will measure:

I _EqCheck;

THFF checks;

Interferometry;

Audible noise checks;

The auxiliary equipment of standing power loss is measured.

2) hot operation test:

Bipolar single converter 1.0p.u. rated load operation test;

The Reactive Power Control test.

3.3.4 bipolar DC system debugging test event

The system debug test event can be in conjunction with carrying out after said system debug-item or the system debug.The main test event that need carry out has:

(1) test of direct current system running status amount, whether checking direct current system operation conditions meets code requirement.

(2) test of AC system running status amount is tested to the runnability of AC system.

(3) overvoltage test, whether the design of checking current conversion station insulation coordination meets code requirement.

(4) harmonic wave test, whether the checking harmonic performance meets code requirement.

(5) electromagnetic environment and noise testing, whether the verifying electromagnetic environmental impact meets code requirement.

3.4 the online fling-cut system debugging of single converter

The online fling-cut system debugging test of single converter, power just send.The purpose of test is the switching performance that checking checks single converter under bipolar operational mode, the bipolar uneven mode of connection and the one pole mode of connection, and to the influence of another utmost point operation; And whether the temporary overvoltage level that produces satisfies demand of technical standard.

3.4.1 bipolar operation, single converter drop into/withdraw from test

(1) bipolar operation, the online excision of single converter/input test

Bipolar operation, the test out of service of rectification side pole 1 high-end converter;

Bipolar operation, the rectification side pole 1 high-end converter test that puts into operation;

Bipolar operation, the test out of service of rectification side pole 2 high-end converters;

Bipolar operation, the rectification side pole 2 high-end converters test that puts into operation;

Bipolar operation, the test out of service of rectification side pole 1 low side converter;

Bipolar operation, the rectification side pole 1 low side converter test that puts into operation;

Bipolar operation, the test out of service of rectification side pole 2 low side converters;

Bipolar operation, the rectification side pole 2 low side converters test that puts into operation;

Bipolar operation, the test out of service of inversion side pole 1 high-end converter;

Bipolar operation, the inversion side pole 1 high-end converter test that puts into operation;

Bipolar operation, the test out of service of inversion side pole 2 high-end converters;

Bipolar operation, the inversion side pole 2 high-end converters test that puts into operation;

Bipolar operation, the test out of service of inversion side pole 1 low side converter;

Bipolar operation, the inversion side pole 1 low side converter test that puts into operation;

Bipolar operation, the test out of service of inversion side pole 2 low side converters;

Bipolar operation, the inversion side pole 2 low side converters test that puts into operation;

Bipolar operation does not have communication, the test out of service of rectification side pole 1 high-end converter;

Bipolar operation does not have communication, the test that puts into operation of rectification side pole 1 high-end converter;

Bipolar operation does not have communication, the test out of service of rectification side pole 2 high-end converters;

Bipolar operation does not have communication, the test that puts into operation of rectification side pole 2 high-end converters;

Bipolar operation does not have communication, the test out of service of rectification side pole 1 low side converter;

Bipolar operation does not have communication, the test that puts into operation of rectification side pole 1 low side converter;

Bipolar operation does not have communication, the test out of service of rectification side pole 2 low side converters;

Bipolar operation does not have communication, the test that puts into operation of rectification side pole 2 low side converters;

Bipolar operation does not have communication, the test out of service of inversion side pole 1 high-end converter;

Bipolar operation does not have communication, the test that puts into operation of inversion side pole 1 low side converter;

Bipolar operation does not have communication, the test out of service of inversion side pole 2 high-end converters;

Bipolar operation does not have communication, the test that puts into operation of inversion side pole 2 high-end converters;

Bipolar operation does not have communication, the test out of service of inversion side pole 1 low side converter;

Bipolar operation does not have communication, the test out of service of inversion side pole 2 low side converters;

Bipolar operation does not have communication, and the inversion side pole is 2 high-end, rectification side pole 2 low side converters put test into operation;

Bipolar operation does not have communication, the test that puts into operation of inversion side pole 2 low sides, rectification side pole 2 high-end converters;

Bipolar operation does not have communication, and the inversion side pole is 1 high-end, rectification side pole 1 low side converter puts test into operation;

Bipolar operation does not have communication, the test that puts into operation of inversion side pole 1 low side, rectification side pole 1 high-end converter.

3.4.2 bipolar converter unbalanced operation, the online excision of single converter/input test

Bipolar operation does not have communication, the test that puts into operation of inversion side pole 1 low side, rectification side pole 1 high-end converter;

Bipolar operation does not have communication, the test that puts into operation of inversion side pole 2 low sides, rectification side pole 2 high-end converters.

3.4.3 the one pole operation, single converter drops into/withdraws from test

The one pole operation, the test out of service of inversion side pole 1 high-end converter;

One pole operation, the rectification side pole 1 high-end converter test that puts into operation;

The one pole operation, the test out of service of inversion side pole 1 low side converter;

One pole operation, the inversion side pole 1 low side converter test that puts into operation;

The one pole operation, the test out of service of rectification side pole 1 low side converter;

One pole operation, the rectification side pole 1 low side converter test that puts into operation;

The one pole operation, the test out of service of side pole 2 high-end converters;

One pole operation, the inversion side pole 2 high-end converters test that puts into operation.

3.4.4 the online fling-cut system debugging of single converter test event

3.5 ice-melt mode of connection system debug

The ice-melt mode of connection is with utmost point I and the high-end converter parallel running of utmost point II, direct current system adopts mixes multiterminal DC control pattern, its objective is the check direct current system under the ice-melt mode of connection, function and the performance of primary equipment and the switching performance of filter of direct current system control.By the test of the ice-melt mode of connection, the heating situation of checking DC line.

3.5.1 ice-melt mode of connection system debug project

Power just send, the test of the ice-melt mode of connection, direct current release/locking test;

Power just send, the test of the ice-melt mode of connection, and control system is switched;

Power just send, the test of the ice-melt mode of connection, direct current lifting test.

4. fielded system debugging brief summary

4.1 system debug performance

Finished 597 of whole direct current system single converters, one pole and bipolar low-power and high-power test planning items to tame dam-Shanghai extra-high voltage direct-current system debug, all pilot projects all satisfy the requirement of technical specification book.

(1) overview

To tame dam-Shanghai ± system debug of 800kV extra-high voltage direct-current transmission demonstration project is that China carries out extra-high voltage direct-current transmission engineering debug work first.Open in engineering under the unified leadership of committee's meeting, by the extra-high voltage direct-current transmission engineering characteristic of combining closely, the science of carrying out is calculated and l-G simulation test, careful debugging scheme, test plan and the safety measure formulated, and attend the commissioning staff in body and work extra shifts or extra hours and work hard, July 2 in 2010 the good day overall height imitate high-quality ground and overfulfiled 46 kinds of modes of connection, 14 big classes, 597 pilot projects.

(1) utmost point 1 low side or high-end single converter pilot project are 121;

(2) utmost point 2 low sides or high-end single converter pilot project are 98;

(3) utmost point 1 double converter pilot project is 72;

(4) utmost point 2 double converter pilot projects are 53;

(5) bipolar double converter pilot project is 54;

(6) AC and DC line fault pilot project is 21;

(7) bipolar single converter pilot project is 44;

(8) bipolar uneven pilot project is 28;

(9) single converter interconnection pilot project is 51;

(10) the high and low end converter of switching pilot project is 37;

(11) distant place control pilot project is 4;

(12) the interior chain pilot project of switch of string is 7;

(13) 1 of ice-melt mode of connection pilot project.

(14) bipolar large load operation test is 6.

(2) system debug performance

Start the implementation plan of the approval of confirmation committee according to engineering, upwards the engineering system debugging is divided into and is following three phases:

Phase I: on February 23rd, 2010 was to March 5.This stage realized on 800 kilovolts of charged bases, the utmost point 1 all fronts on December 26th, 2009, mainly finish and give the utmost point 1 low side and the cross matching relevant with the Fengxian utmost point 1 high-end converter again, finish 75 of pilot projects altogether, realized that the utmost point 1 single converter send the target of electricity to Shanghai.

Second stage: April 20 was to May 12.Mainly finish the test of giving the various modes of connection of the utmost point 2 low sides and the Fengxian utmost point 2 high-end converters input backs again, finished item is 147 altogether, has realized that bipolar single converter send the target of electricity to Shanghai.

Phase III: finish 369 of pilot projects since the phase III system debug on June 15, being divided into for two steps carries out, and the first step was finished 123 of system debug projects after the utmost point 1 high-end converter in multiple dragon station drops in 20 days from June 15 to June; In second from June 24 to the July 2 days step, finish 238 of system debug projects after the multiple dragon station utmost point 2 high-end converters drop into.So far, Yu Ding system debug project is all finished.

Finish 6 of the bipolar rated power operation tests of system debug.

More than all debugging test results show: the control defencive function of bipolar DC system has all obtained checking, and all debug-items have all satisfied the requirement of engineering legislation book, can drop into bipolar large load operation.

The present invention proposes ± 800kV extra-high voltage direct-current transmission engineering system debug-item first, and in Xiang Jiaba-Shanghai ± 800kV extra-high voltage direct-current transmission engineering, obtained application, the system that guaranteed puts into operation on schedule, for extra-high voltage direct-current transmission engineering system debugging from now on provides experience reference and reference.

Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. one kind ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, described system comprises two ends current conversion station and DC power transmission line, and described two ends current conversion station connects by DC power transmission line; The two ends current conversion station all adopts bipolar converter, and every utmost point converter comprises 12 pulse conversion devices of 2 series connection, and series voltage is pressed ± (400+400) kV series connection;

2. as claimed in claim 1 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, the major loop mode of connection of ± 800kV extra-high voltage direct-current transmission engineering system comprises:

＜4〉the ice-melt mode of connection.

3. the adjustment method of one kind ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, described method comprises the steps:

4. the adjustment method of as claimed in claim 3 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, in the described step (), described ± 800kV extra-high voltage direct-current transmission engineering system computational analysis comprises:

5. the adjustment method of as claimed in claim 4 ± 800kV extra-high voltage direct-current transmission engineering system, it is characterized in that, in described (5), the electromagnetism steady-state overvoltage comprises the overvoltage that the overvoltage of stopping transport overvoltage that the ac bus single-phase earthing causes, overvoltage that the converter valve pulse-losing causes, overvoltage, current conversion station DC side that DC line fault causes the overvoltage that causes, the online switching of overvoltage, single converter that the Inverter Station load rejection causes causing and the conversion of one pole the earth metallic return cause.

6. the adjustment method of as claimed in claim 4 ± 800kV extra-high voltage direct-current transmission engineering system, it is characterized in that, in the described step (), the technical supervision of current conversion station subsystem is carried out at the scene, understand content and the pilot project of the debugging of current conversion station subsystem, result of the test and the technical report of the debugging of examination subsystem are reported subsystem technical supervision result to the engineering owner.

7. the adjustment method of as claimed in claim 3 ± 800kV extra-high voltage direct-current transmission engineering system, it is characterized in that, in the described step (two), formulate described ± 800kV extra-high voltage direct-current transmission engineering system debugging scheme according to the major loop mode of connection of single converter system, one pole double converter system, bipolar DC system and the online fling-cut system of single converter, comprising:

＜1〉the debugging scheme of single converter system;

＜2〉the debugging scheme of one pole double converter system;

＜3〉bipolar DC system debugging scheme;

＜4〉ice-melt mode of connection debugging scheme.

8. the adjustment method of as claimed in claim 7 ± 800kV extra-high voltage direct-current transmission engineering system, it is characterized in that, described＜1〉in, the major loop mode of connection of one pole single converter is divided into the basic mode of connection and converter improved cross connect mode, and the basic mode of connection comprises: utmost point I low side converter wiring mode, the high-end converter wiring mode of utmost point I, utmost point II low side converter wiring mode and the high-end converter wiring mode of utmost point II; The improved cross connect mode comprises: rectification side pole I low side converter is connected with the high-end converter of inversion side, the high-end converter of rectification side pole I is connected with inversion side low side converter, rectification side pole II low side converter is connected with the high-end converter of inversion side is connected with inversion side low side converter with the high-end converter of rectification side pole I;

9. the adjustment method of as claimed in claim 8 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, the debugging scheme of the described basic mode of connection comprises:

6) Reactive Power Control test: be used for check current conversion station Reactive Power Control performance and whether satisfy code requirement;

10. the adjustment method of as claimed in claim 7 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that described＜2〉in, the major loop mode of connection of one pole double converter system is divided into utmost point I and the utmost point II mode of connection;

The debugging scheme of described one pole double converter system comprises:

11. the adjustment method of as claimed in claim 7 ± 800kV extra-high voltage direct-current transmission engineering system, it is characterized in that, described＜3〉in, the major loop mode of connection of bipolar DC system is divided into the bipolar double converter mode of connection, two uneven converter wiring mode and the bipolar single converter mode of connection;

12. the adjustment method of as claimed in claim 11 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, the debugging scheme of the described bipolar double converter mode of connection comprises:

1. bipolar double converter direct current system plays/stops test:

2. utmost point tripping operation, the power transfer test:

3. power control test:

4. brownout operation test:

6. alternating current circuit Test to Failure:

7. Reactive Power Control test:

9. rated power and overload trial:

Be used for the steady operation performance that the examination direct current is carried rated power, brownout operation, and various overladen ability; Alternating current-direct current harmonic wave, noise and radio interference are tested, check whether satisfy demand of technical standard;

The debugging scheme of described two uneven converter wiring modes comprises:

One) bipolar uneven converter direct current system plays/stops test:

Two) utmost point tripping operation, the power transfer test:

Three) power control test:

Four) Reactive Power Control test:

I, bipolar single converter direct current system play/stop test:

Ii, utmost point tripping operation, the power transfer test:

Iii, power control test:

13. the adjustment method of as claimed in claim 3 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, in the described step (four), organizes DC engineering system for field debugging test; The tracking computational analysis of field adjustable testing program; The result analyzes to debugging test, and the DC transmission engineering Technical properties of plant is provided evaluation.

14. the adjustment method of as claimed in claim 3 ± 800kV extra-high voltage direct-current transmission engineering system is characterized in that, in the described step (six), the field adjustable data is put in order, is filed; Right ± 800kV extra-high voltage direct-current transmission engineering system debug results is analyzed, is concluded; Write ± report of 800kV extra-high voltage direct-current transmission engineering system debugging technique, debug results and conclusion are analyzed and researched, provide the system debug conclusion.