CN103187727B - A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof - Google Patents
A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof Download PDFInfo
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- CN103187727B CN103187727B CN201310058053.4A CN201310058053A CN103187727B CN 103187727 B CN103187727 B CN 103187727B CN 201310058053 A CN201310058053 A CN 201310058053A CN 103187727 B CN103187727 B CN 103187727B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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Abstract
The present invention is a kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof, and every phase ultra-high/extra-high voltage circuit comprises two groups of switches, is arranged at electrical network respectively by side and electrical network sending end side; Often organize isolating switch I, circuit breaker I and isolating switch II that switch comprises series connection; The present invention arranges controllable phase shifter between two groups of switches of every phase; Controllable phase shifter comprises series transformer, excitation transformer, thyristor controlled series compensation and by-pass switch; Series transformer is connected on every phase ultra-high/extra-high voltage circuit, and is connected with excitation transformer; By-pass switch is in parallel with series transformer; Thyristor controlled series compensation is in parallel with excitation transformer.The present invention realizes utilizing phase shifter carry out flexible controllable adjustment to transmission line trend and do not change line voltage distribution amplitude by controlling controllable phase shifter; and meet after circuit installing controllable phase shifter normally charged, have a power failure and mode of operation, system and phase shifter self overvoltage protection requirement under the different operating mode such as fault, for practical implementation provides solution.
Description
Technical field
The invention belongs to field of power, be specifically related to a kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof.
Background technology
In the last few years, the marketization of modern industry to the requirement of electric energy and electric power required to regulate and control flexibly the ruuning situation of some circuits in electric power system; The FACTS (flexible AC transmitting system) of develop rapidly simultaneously also makes it to become possibility.For transmission system, circuit transmission power can be expressed from the next:
U1, U2 are respectively the amplitude of circuit sending end, receiving end voltage phasor, and δ 1, δ 2 are respectively the phase angle of both end voltage phasor.As can be seen from the above equation, by controlling the voltage of transmission line, impedance and phase angle just can change the power of line transmission.Phase shifter is the adjustment by regulating phase angle to realize line transmission active power.Fig. 1 is the schematic diagram after phase shifter connecting system, and its solid line represents original power, and dotted line represents the power after adjustment.
Assuming that the phase-angle regulator in figure only changes the phase angle of system voltage phasor and does not change the size of voltage, and the voltage phasor equal and opposite in direction of receiving-end system and sending, namely
And U
seff=U
δ=U
σ=U(formula 3)
The load angle characteristic that therefore can obtain system shown in Figure 2 is:
The power-angle curve of phase shifter can be obtained, as shown in Figure 2 by formula above.Visible, after installing phase shifter in system, its load angle characteristic has following features: 1) system can not change the numerical value of maximum transmitted active power after installing phase shifter; 2) the merit angle that after system installs phase shifter, its maximum transmission power is corresponding can change within certain scope.
Because phase shifter has the load angle characteristic shown in Fig. 2, therefore may be used for the flow direction etc. of trend on the transient stability limit of raising system, damping system vibration, control power transmission line when the system failure.
From phase angle regulative mode, phase shifter is divided into mechanical type phase shifter (MPS, MechanicalPhaseShifter) and controllable phase shifter (TCPS, ThyristorControlledPhaseShifter).Mechanical type phase shifter adjusts phase angle by mechanical tap or switch, and controllable phase shifter then realizes phase angle by control thyristor delayed trigger angle or thyristor valve switching and regulates, and wherein the former is continuous control, and the latter is grading control type.
Multiple stage phase shifter is applied in some areas in 110 ~ 500kV extra-high voltage voltage electric grid at present, and is mechanical type phase shifter.
Continuous control type controllable phase shifter, by controlling thyristor delayed trigger angle, makes bucking voltage amplitude consecutive variations, thus realizes regulating the continuously smooth of phase angle, and its schematic diagram as shown in Figure 3.
Thyristor valve classification switching type controllable phase shifter refers to thyristor controlled series compensation to be classification diverter switch, each thyristor controlled series compensation is made up of the parallel connected in reverse phase thyristor of one or more pairs of serial connection, by controlling conducting, the discrete control of shutoff realization to bucking voltage, phase angle of thyristor controlled series compensation.It is 1:3:9 that current excitation transformer secondary side winding often adopts the mode of connection to be n level windings in series or turn ratio ... 3
nwindings in series mode.Both compare, if realize same adjustment progression, the thyristor quantity that the former uses is many; The thyristor valve that the latter uses then is compared less, the thyristor valve quantity difference that its every grade winding is corresponding, can realize 3 by conducting, the shutoff controlling each thyristor controlled series compensation
n+1individual differential classification regulates.As shown in Figure 4 and Figure 5.
From the regulating effect aspect of voltage magnitude and phase angle, phase shifter can be divided into longitudinally, laterally and oblique three kinds.Longitudinal phase shifter seals in the additional potential identical or anti-phase with input voltage in the line, and to increase or to reduce the amplitude of voltage, its schematic diagram as shown in Figure 6; Horizontal phase shifter is then seal in the line in phase place, differ ± the additional potential of 90 ° with input voltage, and can realize the adjustment to voltage magnitude and phase place, its schematic diagram as shown in Figure 7 simultaneously; Oblique phase shifter seals in the line to be not equal to 0 °, ± 90 °, ± additional potential of 180 ° with input voltage phase difference, and being characterized in can the size of regulation voltage and phase place neatly, and accomplish the flexible control to voltage, its schematic diagram as shown in Figure 8.
With regard to phase shifter self, current mechanical type phase shifter has the following disadvantages:
(1) mechanical type phase shifter structure is simple, and cost is low, but responsiveness is slow, the control to trend can only be realized, cannot to raising power system transient stability, suppress power oscillation play a role, and due to the consumption of mechanical contact loss and immersion oil, line service amount is large, maintenance cost is high.
(2) there are following three shortcomings in the continuous control type controllable phase shifter controlling thyristor delayed trigger angle: 1) has phase difference between the fundametal compoment of bucking voltage and AC power; 2) there is harmonic problem, need to install output filtering device additional, improve equipment manufacturing cost; 3) IGBT group angle and load characteristic closely related, control relative complex.The controllable phase shifter of thyristor valve switching mode can realize the classification adjustment of phase shift angle, controls relatively simple, can not introduce harmonic wave or phase shift, without the need to installing filter additional, shortcoming be classification more time, the thyristor quantity of needs is more, and the complexity of thyristor valve structure and cost increase a lot.Therefore consider from practical implementation angle, correlative study both at home and abroad at present all recommends controllable phase shifter to adopt thyristor classification switching mode.
(3) compared with oblique phase shifter, horizontal phase shifter both can the size of regulation voltage also can the phase place of regulation voltage, but the same with longitudinal phase shifter, its bucking voltage only has one degree of freedom, regulates also underaction in some cases.If only need to change the phase place of voltage and do not wish to change the size of voltage, transverse adjustment is just difficult to accomplish.
Summary of the invention
For the deficiencies in the prior art; the present invention proposes a kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof; realization utilizes phase shifter carry out flexible controllable adjustment to transmission line trend and do not change line voltage distribution amplitude; and meet after circuit installing controllable phase shifter normally charged, have a power failure and mode of operation, system and phase shifter self overvoltage protection requirement under the different operating mode such as fault, for practical implementation provides solution.
A kind of controllable phase shifter for ultra-high/extra-high voltage circuit provided by the invention, three-phase ultra-high/extra-high voltage connection by between side and sending end side, every phase ultra-high/extra-high voltage circuit comprises two groups of switches in electrical network, is arranged at electrical network respectively by side and electrical network sending end side; Often organize isolating switch I, circuit breaker I and isolating switch II that switch comprises series connection; Its improvements are, between two groups of switches of every phase, arrange controllable phase shifter;
Described controllable phase shifter comprises series transformer, excitation transformer, thyristor controlled series compensation and by-pass switch; Described series transformer is connected on every phase ultra-high/extra-high voltage circuit, and is connected with described excitation transformer; Described thyristor controlled series compensation is in parallel with described excitation transformer.
Described by-pass switch is in parallel with described series transformer.Wherein, the first side winding of described series transformer is divided into two sections, is connected on ultra-high/extra-high voltage circuit, and centre tap is connected with the first side winding of the described excitation transformer on homophase ultra-high/extra-high voltage circuit; The secondary side winding of the series transformer on secondary side winding and all the other two ultra-high/extra-high voltage circuits of described series transformer is triangular in shape to be connected.
Wherein, the first side winding of the excitation transformer on the first side winding of described excitation transformer and all the other two-phase ultra-high/extra-high voltage circuits is Y-connection; The secondary side winding of described excitation transformer is Y-connection by the secondary side winding of the excitation transformer on thyristor controlled series compensation and all the other two-phase ultra-high/extra-high voltage circuits.
Wherein, described excitation transformer secondary side adopts turn ratio to be K
nwindings in series mode, or adopt equal difference/Geometric Sequence number of turn windings in series.
Wherein, every grade of winding two ends of described excitation transformer secondary side are all arranged in parallel thyristor controlled series compensation.
Wherein, the described four groups of thyristor modules often organized thyristor valve and comprise H bridge construction;
Often organize thyristor module and comprise antiparallel thyristor;
In the thyristor module of winding parallel at different levels, the number of thyristor is than being K
n, or become equal difference/geometric ratio relation.
Wherein, described controllable phase shifter comprises a circuit breaker II isolating switch III and isolating switch IV, for phase shifter power transmission with exit;
Circuit breaker II and isolating switch III is connected on the line side of controllable phase shifter series transformer, and isolating switch IV is connected on the bus bar side of series transformer;
Controllable phase shifter normally exit or because of fault exit time, equal cut-off breaker II, isolating switch III and isolating switch IV.
Wherein, described controllable phase shifter comprises by-pass switch, for outside controllable phase shifter district, troubles inside the sample space backed off after random or maintenance time isolation;
During normal operation, by-pass switch is in a point position, and when needing isolation controllable phase shifter, by-pass switch closes.
Wherein, described controllable phase shifter comprises lightning arrester, for limiting line voltage distribution.
Wherein, described lightning arrester is separately positioned on excitation transformer primary side high-pressure side, secondary side high-pressure side and circuit breaker II both sides.
Wherein, the primary side of described series transformer and the equal ground connection of the neutral point of secondary side;
The primary side of described excitation transformer and the equal ground connection of the neutral point of secondary side.
The present invention is based on the method for operation of a kind of controllable phase shifter for ultra-high/extra-high voltage circuit that another object provides, its improvements are, described method comprises the steps:
(1) combined floodgate controllable phase shifter bus bar side circuit breaker, charges to unloaded phase shifter;
(2) the opposite side circuit breaker of combined floodgate controllable phase shifter place circuit, charges to nonloaded line;
(3) the circuit breaker II of combined floodgate controllable phase shifter, carries out the cyclization same period, controllable phase shifter place circuit band phase shifter Electromagnetic coupling.
(4) Control protection system Real-Time Monitoring controllable phase shifter, when a failure occurs, carries out detecting and eliminates fault step;
(5), when controllable phase shifter is exited in user's setting, disconnect controllable phase shifter circuit breaker II, circuit band phase shifter unlinks;
(6) controllable phase shifter place circuit opposite side circuit breaker is disconnected, excision nonloaded line;
(7) disconnect controllable phase shifter bus bar side circuit breaker, excise unloaded phase shifter.
Wherein, step (4) described detection eliminate fault step and comprise:
1) described Control protection system failure judgement region and fault type;
2) corresponding actions is carried out according to fault zone and fault type.
Wherein, fault zone described in step 1) comprises troubles inside the sample space and external area error;
Described troubles inside the sample space refers to the fault comprising controllable phase shifter body and controllable phase shifter bus bar side circuit breaker line side and occur to circuit breaker II scope;
Described external area error refers to the fault that region outside controllable phase shifter bus bar side circuit breaker and circuit breaker II occurs, and comprises circuit, situation that two side bus, adjacent lines break down.
Wherein, for external area error, comprising:
A) when controllable phase shifter place circuit or adjacent lines generation external area error, controllable phase shifter circuit breaker II is failure to actuate, and excises fault by the line-breaker action of circuit both sides, phase shifter place;
B) outside controllable phase shifter place circuit generating region during single wink fault, the by-pass switch of controllable phase shifter of closing, and tripping line fault phase both sides circuit breaker; Or/and
C) outside controllable phase shifter place circuit generating region when single fault or heterogeneous fault forever, the by-pass switch of controllable phase shifter of closing, and tripping circuit both sides three-phase breaker.
Wherein, during step b) generation single-phase fault, the by-pass switch of controllable phase shifter of closing, and tripping line fault phase both sides circuit breaker, then controllable phase shifter carries out the single-pole reclosing operation of circuit both sides circuit breaker, and action logic when method of operation and the circuit of both sides circuit breaker do not install controllable phase shifter is consistent.
Wherein, for troubles inside the sample space, comprising:
During the internal fault of circuit generating region, controllable phase shifter place, the by-pass switch of controllable phase shifter of closing, and controllable phase shifter bus bar side circuit breaker and the equal three-phase tripping operation of circuit breaker II, by failure removal.
Compared with the prior art, beneficial effect of the present invention is:
1, the present invention may be used for carrying out flexible discrete controllable adjustment to ultra-high/extra-high voltage transmission line trend, and does not change the Expected Results of line voltage distribution; By controlling the conducting of excitation transformer secondary side winding at different levels thyristor controlled series compensation, shutoff order can realize to phase shift angle positive and negative twocouese classification discrete adjustment, and governing speed is fast, and can not produce harmonic problem.
2, in normal charged, power failure operation operating mode when the present invention meets ultra-high/extra-high voltage transmission line installing controllable phase shifter, and there is simple operation under dissimilar fault condition and overvoltage protection demand in phase shifter circuit.
3, the present invention can reduce circuit installing controllable phase shifter after mode of operation complexity, and the complex operations adverse effect that the normal power transmission of circuit is caused reduced after circuit installing phase shifter, guarantee the security of operation of transmission system and controllable phase shifter body, solve engineer applied demand during installing controllable phase shifter.
4, the present invention only increases circuit breaker II, isolating switch III, isolating switch IV and by-pass switch, and sets its position, and number of devices is few, and engineering equipment investment is low, good economy performance, saves cost.
5, operating procedure of the present invention is simple, and manipulation flexibly.
6, thyristor of the present invention adopts progressive operation, the grading control to phase shift angle can be realized, meet the power flow regulating requirement of different amplitude, and the control method of classification switching mode is simple, harmonic wave or phase shift can not be introduced, without the need to installing filter additional, cost saving, is convenient to practical engineering application.
Accompanying drawing explanation
Fig. 1 is the schematic diagram after phase-angle regulator connecting system.
Fig. 2 is the power-angle curve of phase shifter.
Fig. 3 is that thyristor continuous control type phase shifter simplifies winding diagram.
Fig. 4 is that thyristor classification switching control type phase shifter simplifies winding diagram one, and wherein phase shifter is the controllable phase shifter of n level series connection.
Fig. 5 is that thyristor classification switching control type phase shifter simplifies winding diagram two, and wherein phase shifter is 3
nthe controllable phase shifter of level series connection.
Fig. 6 is the schematic diagram of longitudinal phase shift.
Fig. 7 is the schematic diagram of horizontal phase shift.
Fig. 8 is the schematic diagram of oblique phase shift.
Fig. 9 is ultra-high/extra-high voltage electrical network thyristor valve switching type controllable phase shifter main circuit structure schematic diagram provided by the invention.
Figure 10 is controllable phase shifter thyristor controlled series compensation structural representation one provided by the invention, and it is 3
nthyristor controlled series compensation structure (k=3) under winding method.
Figure 11 is controllable phase shifter thyristor controlled series compensation structural representation two provided by the invention, and it is 3
nthyristor controlled series compensation structure (n=2) under winding method.
Figure 12 is in ultra-high/extra-high voltage controllable phase shifter district provided by the invention, external area error scope schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
The controllable phase shifter main circuit structure of the present embodiment and the design of operation strategy design as follows:
(1) based on the com-parison and analysis of the performance to different adjustment effect, different debud mode phase shifter, determine to take the oblique controllable phase shifter of thyristor valve switching type, propose the mode of connection that phase shifter adds series transformer, excitation transformer;
(2) the K value in Kn is determined according to the classification quantitative requirement of controllable phase shifter, the excitation transformer secondary side winding number of turn when thyristor controlled series compensation structure namely clearly adopted;
(3) according to the installation position of controllable phase shifter installation position determination circuit breaker II and two isolating switch on the line and the installation position of each protection MOA;
(4) main circuit structure of ultra-high/extra-high voltage circuit controllable phase shifter is determined according to (1) ~ (3);
(5) in the district according to controllable phase shifter installation position determination controllable phase shifter on the line, external area error regional extent;
(6) according to the circuit that may occur after circuit being installed controllable phase shifter and controllable phase shifter is charged, power failure normal running operating mode, and contingent line fault, propose to controllable phase shifter place route protection and both sides circuit breaker under different operating mode, and the operation strategy of the switch element such as the circuit breaker II of controllable phase shifter and isolating switch thereof;
(7) based on (5) ~ (6), overall operational strategy ultra-high/extra-high voltage circuit being installed controllable phase shifter is proposed.
The present embodiment is realize above-mentioned scheme, a kind of controllable phase shifter for ultra-high/extra-high voltage circuit proposed, as shown in Figure 9, three-phase ultra-high/extra-high voltage connection is between electrical network sending end and the receiving end, every phase ultra-high/extra-high voltage circuit comprises two groups of switches, is arranged at electrical network respectively by side and electrical network sending end side; Described switch comprises isolating switch I, circuit breaker I and the isolating switch II of series connection; Its circuit sending end installs a thyristor valve switching type controllable phase shifter, is the main circuit structure schematic diagram of controllable phase shifter in figure shown in square frame.
As shown in Figure 9, controllable phase shifter main element comprises series transformer, excitation transformer, thyristor controlled series compensation, circuit breaker II and isolating switch, by-pass switch, lightning arrester.Situation and the function of each element are as follows:
1, series transformer: the first side winding of series transformer is divided into two sections, is connected on ultra-high/extra-high voltage circuit, and centre tap is connected with the first side winding of the described excitation transformer on homophase ultra-high/extra-high voltage circuit; The secondary side winding of the series transformer on secondary side winding and all the other two ultra-high/extra-high voltage circuits of described series transformer is triangular in shape to be connected.The equal ground connection of neutral point of its primary side and secondary side.
2, excitation transformer: the first side winding of the excitation transformer on the first side winding of excitation transformer and all the other two-phase ultra-high/extra-high voltage circuits is Y-connection; The secondary side winding of described excitation transformer is Y-connection by the secondary side winding of the excitation transformer on thyristor controlled series compensation and all the other two-phase ultra-high/extra-high voltage circuits.The primary side of excitation transformer and the equal ground connection of the neutral point of secondary side.The secondary side of excitation transformer adopts turn ratio to be K
n(K be greater than 1 positive integer) windings in series mode or odd ratio number of turn winding.
3, thyristor controlled series compensation: thyristor controlled series compensation is connected in parallel on every layer of winding two ends of excitation transformer secondary side, realizes the phase shift in multistage and positive and negative two directions by control turn on thyristors and shutoff mode.Often organize four groups of thyristor modules that thyristor valve comprises H bridge construction; Often organize thyristor module and comprise antiparallel thyristor, wherein in every layer of thyristor module arranged, the number ratio of thyristor is K
n(K be greater than 1 positive integer, n=1,2,3 ...Figure 10 shows that k=3, thyristor valve structural representation during n=2, the thyristor controlled series compensation structure when thyristor valve quantity of winding at different levels is corresponding k=2, n=3 shown in 1:3:9, Figure 11, the thyristor valve quantity of winding at different levels is 1:2:4:8.
On ultra-high/extra-high voltage transmission line, 220kV ~ 765kV is superhigh pressure; when more than 765kV is for ultra high voltage installing controllable phase shifter; because phase shifter is connected in the line; therefore the normal throwing, retreating in conjunction with controllable phase shifter and place circuit thereof and dissimilar fault is needed; formulate rational mode of operation and overvoltage protection strategy, solve engineer applied demand during installing controllable phase shifter.
4, circuit breaker II and isolating switch thereof: every phase controllable phase shifter comprises a circuit breaker II and two isolating switch III and IV, for controllable phase shifter power transmission with exit.A circuit breaker II and isolating switch III is installed in the line side of controllable phase shifter series transformer, and another isolating switch IV is installed in the bus bar side of series transformer.During normal operation, circuit breaker II and two isolating switch in co-bit, controllable phase shifter normally exit or because of body fault exit time, all need to be realized by cut-off breaker II and two isolating switch; Circuit breaker II is also for Loop Closing Operation during controllable phase shifter circuit power transmission;
5, lightning arrester: install ET three phases winding at primary side high-pressure side, secondary side winding high voltage end at different levels respectively, and circuit breaker II both sides, for limiting the switching overvoltage in each position.
6, by-pass switch: for outside controllable phase shifter district, troubles inside the sample space backed off after random or maintenance time isolation, normal when running by-pass switch in a point position, when needing isolation controllable phase shifter when breaking down or overhaul, closes bypass switch.The by-pass switch of the present embodiment is in parallel with series transformer and circuit breaker II on the ultra-high/extra-high voltage circuit of any phase, and it can adopt circuit breaker to realize.
Corresponding, the present embodiment proposes when circuit sending end installing controllable phase shifter, and its sending end line-breaker need be used for performing the operation to controllable phase shifter under different operating mode.
The method of operation of the ultra-high/extra-high voltage controllable phase shifter that the present embodiment proposes, comprises normal and fault two type operating mode:
(1) nominal situation: be divided into normal hot line job and normal power failure operation.
For normal hot line job, according to following strategy execution:
1) combined floodgate controllable phase shifter bus bar side circuit breaker, charges to unloaded controllable phase shifter (no-load transformer);
2) the opposite side circuit breaker of combined floodgate controllable phase shifter place circuit, charges to nonloaded line;
3) combined floodgate controllable phase shifter circuit breaker II, carries out the cyclization same period, controllable phase shifter place circuit band phase shifter Electromagnetic coupling.(it needs to detect the voltage difference of circuit breaker Loop Closing Operation point both sides, whether phase angle difference meets the ring device setting value requirement same period that circuit breaker is installed, if meet, can normally close a floodgate, make circuit cyclization bringing onto load trend, if do not meet, then circuit breaker does not close a floodgate)
For normal power failure operation, according to following strategy execution:
1) disconnect controllable phase shifter circuit breaker II, circuit band controllable phase shifter is unlinked;
2) controllable phase shifter place circuit opposite side circuit breaker is disconnected, excision nonloaded line;
3) disconnect controllable phase shifter bus bar side circuit breaker, excise unloaded controllable phase shifter (no-load transformer).
(2) fault condition: fault condition is divided into troubles inside the sample space and external area error.Troubles inside the sample space refers to the fault comprising controllable phase shifter body and controllable phase shifter bus bar side circuit breaker line side and occur to circuit breaker II scope; External area error refers to the fault that region outside controllable phase shifter bus bar side circuit breaker and circuit breaker II occurs, and comprises circuit, situation that two side bus, adjacent lines break down, as shown in figure 12.
1) external area error
A) when controllable phase shifter place circuit or adjacent lines generation external area error, controllable phase shifter circuit breaker II is failure to actuate, the by-pass switch of controllable phase shifter of closing, and excise fault by the line-breaker action of circuit both sides, controllable phase shifter place, identical when the protection act logical AND of controllable phase shifter place circuit does not install phase shifter;
B) outside controllable phase shifter place circuit generating region during single wink fault, the by-pass switch of controllable phase shifter of closing, and tripping line fault phase both sides circuit breaker, also band controllable phase shifter can be allowed to carry out circuit both sides circuit breaker single-pole reclosing, identical with action logic when not installing phase shifter, reduce number of operations;
C) outside controllable phase shifter place circuit generating region when single fault or heterogeneous fault forever, the by-pass switch of controllable phase shifter of closing, and tripping circuit both sides three-phase breaker.
2) troubles inside the sample space: during the internal fault of circuit generating region, phase shifter place, the by-pass switch of controllable phase shifter of closing, and controllable phase shifter bus bar side circuit breaker and the equal three-phase tripping operation of circuit breaker II, by failure removal, and the by-pass switch of controllable phase shifter of closing.
The Control protection system that the present embodiment is configured by controllable phase shifter carries out implementing monitoring controllable phase shifter.Control protection system belongs to the control section of controllable phase shifter device, primary responsibility is measured, monitoring, protection and the transmission of control strategy and execution.
Finally should be noted that: 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 to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (14)
1. for a method of operation for the controllable phase shifter of ultra-high/extra-high voltage circuit, three-phase ultra-high/extra-high voltage connection by between side and sending end side, every phase ultra-high/extra-high voltage circuit comprises two groups of switches in electrical network, is arranged at electrical network respectively by side and electrical network sending end side; Often organize isolating switch I, circuit breaker I and isolating switch II that switch comprises series connection; Between two groups of switches of every phase, controllable phase shifter is set;
Described controllable phase shifter comprises series transformer, excitation transformer, thyristor controlled series compensation and by-pass switch; Described series transformer is connected on every phase ultra-high/extra-high voltage circuit, and is connected with described excitation transformer; Described thyristor controlled series compensation is in parallel with described excitation transformer; Described by-pass switch is in parallel with described series transformer;
It is characterized in that, described method comprises the steps:
(1) combined floodgate controllable phase shifter bus bar side circuit breaker, charges to unloaded phase shifter;
(2) the opposite side circuit breaker of combined floodgate controllable phase shifter place circuit, charges to nonloaded line;
(3) the circuit breaker II of combined floodgate controllable phase shifter, carries out the cyclization same period, controllable phase shifter place circuit band phase shifter Electromagnetic coupling;
(4) Control protection system Real-Time Monitoring controllable phase shifter, when a failure occurs, carries out detecting and eliminates fault step;
(5), when controllable phase shifter is exited in user's setting, disconnect controllable phase shifter circuit breaker II, circuit band phase shifter unlinks;
(6) controllable phase shifter place circuit opposite side circuit breaker is disconnected, excision nonloaded line;
(7) disconnect controllable phase shifter bus bar side circuit breaker, excise unloaded phase shifter;
Step (4) described detection is also eliminated fault step and is comprised:
1) described Control protection system failure judgement region and fault type;
2) corresponding actions is carried out according to fault zone and fault type;
Step 1) described fault zone comprises troubles inside the sample space and external area error;
Described troubles inside the sample space refers to the fault comprising controllable phase shifter body and controllable phase shifter bus bar side circuit breaker line side and occur to circuit breaker II scope;
Described external area error refers to the fault that region outside controllable phase shifter bus bar side circuit breaker and circuit breaker II occurs, and comprises circuit, situation that two side bus, adjacent lines break down.
2. method of operation as claimed in claim 1, it is characterized in that, the first side winding of described series transformer is divided into two sections, is connected on ultra-high/extra-high voltage circuit, and centre tap is connected with the first side winding of the described excitation transformer on homophase ultra-high/extra-high voltage circuit; The secondary side winding of described series transformer is connected with the secondary side winding of the series transformer on all the other two-phase ultra-high/extra-high voltage circuits is triangular in shape.
3. method of operation as claimed in claim 1, is characterized in that, the first side winding of the excitation transformer on the first side winding of described excitation transformer and all the other two-phase ultra-high/extra-high voltage circuits is Y-connection; The secondary side winding of described excitation transformer is Y-connection by the secondary side winding of the excitation transformer on thyristor controlled series compensation and all the other two-phase ultra-high/extra-high voltage circuits.
4. method of operation as claimed in claim 3, is characterized in that, described excitation transformer secondary side adopts turn ratio to be K
nwindings in series mode, or adopt equal difference/Geometric Sequence number of turn windings in series.
5. method of operation as claimed in claim 4, it is characterized in that, every grade of winding two ends of described excitation transformer secondary side are all arranged in parallel thyristor controlled series compensation.
6. the method for operation as described in claim 3 or 5, is characterized in that, the described four groups of thyristor modules often organized thyristor valve and comprise H bridge construction;
Often organize thyristor module and comprise antiparallel thyristor;
In the thyristor module of winding parallel at different levels, the number of thyristor is than being K
n, or become equal difference/geometric ratio relation.
7. method of operation as claimed in claim 1, it is characterized in that, described controllable phase shifter comprises a circuit breaker II isolating switch III and isolating switch IV, for phase shifter power transmission with exit;
Circuit breaker II and isolating switch III is connected on the line side of controllable phase shifter series transformer, and isolating switch IV is connected on the bus bar side of series transformer;
Controllable phase shifter normally exit or because of fault exit time, equal cut-off breaker II, isolating switch III and isolating switch IV.
8. method of operation as claimed in claim 1, it is characterized in that, described controllable phase shifter comprises by-pass switch, in controllable phase shifter the district outside, troubles inside the sample space backed off after random or isolation when overhauling;
During normal operation, by-pass switch is in a point position, and when needing isolation controllable phase shifter, by-pass switch closes.
9. method of operation as claimed in claim 1, it is characterized in that, described controllable phase shifter comprises lightning arrester, for limiting line voltage distribution.
10. method of operation as claimed in claim 9, it is characterized in that, described lightning arrester is separately positioned on excitation transformer primary side high-pressure side, secondary side high-pressure side and circuit breaker II both sides.
11. methods of operation as claimed in claim 1, is characterized in that, the primary side of described series transformer and the equal ground connection of the neutral point of secondary side;
The primary side of described excitation transformer and the equal ground connection of the neutral point of secondary side.
12. methods of operation as claimed in claim 1, is characterized in that, for external area error, comprising:
A) when controllable phase shifter place circuit or adjacent lines generation external area error, controllable phase shifter circuit breaker II is failure to actuate, and excises fault by the line-breaker action of circuit both sides, phase shifter place;
B) outside controllable phase shifter place circuit generating region during single wink fault, the by-pass switch of controllable phase shifter of closing, and tripping line fault phase both sides circuit breaker; Or/and
C) outside controllable phase shifter place circuit generating region when single fault or heterogeneous fault forever, the by-pass switch of controllable phase shifter of closing, and tripping circuit both sides three-phase breaker.
13. methods of operation as claimed in claim 12, it is characterized in that, step b) when there is single-phase fault, the by-pass switch of controllable phase shifter of closing, and tripping line fault phase both sides circuit breaker, then controllable phase shifter carries out the single-pole reclosing operation of circuit both sides circuit breaker, and action logic when method of operation and the circuit of both sides circuit breaker do not install controllable phase shifter is consistent.
14. methods of operation as claimed in claim 1, is characterized in that, for troubles inside the sample space, comprising:
During the internal fault of circuit generating region, controllable phase shifter place, the by-pass switch of controllable phase shifter of closing, and controllable phase shifter bus bar side circuit breaker and the equal three-phase tripping operation of circuit breaker II, by failure removal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310058053.4A CN103187727B (en) | 2013-02-25 | 2013-02-25 | A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof |
| PCT/CN2013/089372 WO2014127664A1 (en) | 2013-02-25 | 2013-12-13 | Controllable phase shifter for extra/ultra high voltage line and operating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310058053.4A CN103187727B (en) | 2013-02-25 | 2013-02-25 | A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof |
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| Publication Number | Publication Date |
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| CN103187727A CN103187727A (en) | 2013-07-03 |
| CN103187727B true CN103187727B (en) | 2016-04-20 |
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| Country | Link |
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| CN (1) | CN103187727B (en) |
| WO (1) | WO2014127664A1 (en) |
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| CN103187727B (en) * | 2013-02-25 | 2016-04-20 | 中国电力科学研究院 | A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof |
| CN103490395B (en) * | 2013-09-09 | 2016-02-24 | 西安交通大学 | Twin-core controllable phase shifter is utilized to limit the method for line short circuit current |
| CN103680863A (en) * | 2013-12-25 | 2014-03-26 | 保定天威保变电气股份有限公司 | Quadrature booster wiring method |
| CN104934974A (en) * | 2015-07-01 | 2015-09-23 | 国网智能电网研究院 | Controllable phase shifter with short-circuit current limiting function |
| CN105004951A (en) * | 2015-07-08 | 2015-10-28 | 上海南自科技股份有限公司 | Voltage drop generation device |
| CN107134780A (en) * | 2017-06-29 | 2017-09-05 | 西安交通大学 | A kind of flexible multimode switch topology in port of Modularized medium-voltage three |
| CN107492891B (en) * | 2017-08-25 | 2023-04-28 | 国网安徽省电力公司安庆供电公司 | Mobile intelligent ring closing device and use method thereof |
| CN108023336A (en) * | 2017-12-18 | 2018-05-11 | 安徽伊格瑞德电气设备有限公司 | A kind of holding meanss based on explosive bridge FSR busbar residual voltages |
| CN109412176A (en) * | 2018-09-19 | 2019-03-01 | 华北电力大学 | It is a kind of for improving the control method of stability of power system |
| CN109995005B (en) * | 2019-04-30 | 2021-02-19 | 华南理工大学 | Direct-current transmission line pilot protection method based on trigger angle change rate mean value |
| CN111555289A (en) * | 2020-05-12 | 2020-08-18 | 国网山西省电力公司吕梁供电公司 | Phase compensation based online restraining method for closed-loop circulation of power distribution network |
| CN111952970B (en) * | 2020-08-17 | 2024-03-19 | 云南电网有限责任公司电力科学研究院 | Method and device for closing loop and regulating electricity of power distribution network |
| CN112803407B (en) * | 2021-03-12 | 2023-01-03 | 广东电网有限责任公司广州供电局 | Low-voltage distribution network seamless loop-closing power transfer method and system based on parallel converters |
| CN113629732A (en) * | 2021-08-25 | 2021-11-09 | 国网江苏省电力有限公司电力科学研究院 | Subsynchronous oscillation suppression method, system, device and verification method |
| CN113937887A (en) * | 2021-10-12 | 2022-01-14 | 西安热工研究院有限公司 | Phase shifter loop closing thermal inversion control method and system |
| CN115377974B (en) * | 2022-10-21 | 2022-12-23 | 国网江苏省电力有限公司电力科学研究院 | Phase shifter multi-working-condition self-adaptive control method |
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| CN103187727B (en) * | 2013-02-25 | 2016-04-20 | 中国电力科学研究院 | A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and method of operation thereof |
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| US5166597A (en) * | 1991-08-08 | 1992-11-24 | Electric Power Research Institute | Phase-shifting transformer system |
| US5461300A (en) * | 1993-03-30 | 1995-10-24 | Electric Power Research Institute, Inc. | Phase angle regulating transformer with a single core per phase |
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| CN103187727A (en) | 2013-07-03 |
| WO2014127664A1 (en) | 2014-08-28 |
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