CN104124689B - For the flexible direct current active power controller method of hybrid AC/DC power transmission systems - Google Patents
For the flexible direct current active power controller method of hybrid AC/DC power transmission systems Download PDFInfo
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- CN104124689B CN104124689B CN201410329502.9A CN201410329502A CN104124689B CN 104124689 B CN104124689 B CN 104124689B CN 201410329502 A CN201410329502 A CN 201410329502A CN 104124689 B CN104124689 B CN 104124689B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001276 controlling effect Effects 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 12
- 238000004088 simulation Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
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- 230000010363 phase shift Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The present invention relates to a kind of flexible direct current active power controller method for hybrid AC/DC power transmission systems, it is characterized in that: transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; During normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by automatically regulating the active power of flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending.The present invention can meet the active power controller requirement of soft straight device, and controlling unit is simple, and all adopt Linear Control, easily realize in engineering, control stability is good.
Description
Technical field
The present invention relates to the flexible DC power transmission (VoltageSourceConverterbasedHighVoltageDirectCurrent in electric power system field of power transmission, VSC-HVDC) technical field, especially a kind of flexible direct current active power controller method for hybrid AC/DC power transmission systems.
Background technology
Flexible DC power transmission is a kind of high voltage dc transmission technology starting the nineties in 20th century to develop, and it has active power and reactive power and independently controls fast, the advantage such as can to power to passive network.Existing tens flexible direct current engineerings put into operation in the world at present, and China's first flexible direct current engineering Shanghai Nanhui flexible DC power transmission engineering also put into operation in 2011.
In the engineering of going into operation, not yet occur interchange-flexible direct current hybrid power system as depicted in figs. 1 and 2, but exchanging at present shown in existing Fig. 1 with Fig. 2-flexible direct current hybrid power system is being built.In hybrid AC/DC power transmission systems main circuit diagram as shown in Figure 3, when the design of flexible direct current circuit rated power, usually depend on workload demand Pload under the large mode of receiving end electrical network.When operation of power networks is in large mode, AC system power P ac and flexible direct current line power Pdc all flows to receiving end electrical network from sending end electrical network.And when receiving end operation of power networks is in little mode, may occur that the burden with power Pload of receiving end electrical network is less than the situation of flexible direct current line power transmission power Pdc, now Pdc cannot dissolve completely at receiving end network, sending end network will be sent back to by alternating current circuit, occur load bypass, namely AC system power P ac flows back to sending end electrical network by receiving end electrical network.When there is this operational mode, the power additionally carried by DC line will produce unnecessary line loss in DC line, the AC power of simultaneously sending receiving end network back to by alternating current circuit also will produce line loss, obvious this kind of mode increases the network loss of transmission system, both unreasonable also uneconomical.
Based on the problems referred to above, by predicting load in advance, the active power set point adjusting flexible direct current device active power controller end in advance reduces the transmission power of flexible direct current circuit, thus prevents alternating current circuit power from occurring sending.But when load increases, need again again to adjust.The method of this artificial adjustment can not realize real-time adjustment, causes difficulty to operation.Therefore a kind of control method must be needed automatically to regulate the transmission power of soft straight device, to solve the problem.
Summary of the invention
In view of this, the object of this invention is to provide a kind of flexible direct current active power controller method for hybrid AC/DC power transmission systems, by introducing the active power feedback of alternating current circuit in the active power link of soft straight device, soft straight device active power delivery value is automatically adjusted, thus prevents alternating current circuit emergent power reverse.
The present invention adopts following scheme to realize: a kind of flexible direct current active power controller method for hybrid AC/DC power transmission systems, it is characterized in that: transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; During normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by automatically regulating the active power of flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending.
In an embodiment of the present invention, the active power of described adjustment flexible DC power transmission circuit comprises the following steps:
S01: obtain alternating current circuit active power value P
ac, described alternating current circuit active power value P
actaking from alternating current circuit by substation bus bar place, side, obtaining by measuring, be just to inject receiving end electrical network, and value imported into the control system of flexible direct current converter valve by communication mode;
S02: obtain flexible DC power transmission circuit active power value P
dc, described flexible DC power transmission circuit active power value P
dctaking from the change of current of flexible DC power transmission circuit receiving end inverter side and become exit, obtaining by measuring, be just to inject receiving end electrical network, and value imported into the control system of flexible direct current converter valve by communication mode;
S03: obtain active power bid value; By the alternating current circuit active power value P that described step S01 and step S02 obtains
acwith flexible DC power transmission circuit active power value P
dccarry out algebraically superposition, the value P of gained
addto send in comparator and with the active power reference value P of soft straight device
refcompare, described P
addwith P
refin smaller value be active power bid value P
ord, flexible DC power transmission circuit active power value P
dcwill by P
ordcontrol; Therefore, P is worked as
acfor timing, P
addbe greater than P
ref, now P
ordget P
ref, have P
dc=P
ref; Work as P
acfor time negative, P
addbe less than P
ref, now P
ordget P
add, have P
dc=P
add;
S04: realize active power controller; By the active power bid value P obtained in described step S03
ordactive power controller target in controlling as soft straight device outer shroud, makes the active power of soft straight line path reach bid value by controlling the direct axis component of alternating current.
In an embodiment of the present invention, the concrete grammar of described step S04 is: first by described P
ordwith P
dctry to achieve wattful power rate variance P
error, then by described wattful power rate variance P
errorafter FEEDBACK CONTROL link, obtain the reference value i of the alternating current direct axis component after converter valve inversion
dref, by i
drefsend in the interior ring controller of flexible direct current device, by inner ring control, dq inverse transformation and modulation strategy link, obtain converter valve trigger impulse, by rectification and the inversion of converter valve, thus make flexible DC power transmission circuit active-power P
dcvalue reaches active power bid value P
ord.
In an embodiment of the present invention, described FEEDBACK CONTROL link is linear PI controlling unit.
The present invention can meet the active power controller requirement of soft straight device, and controlling unit is simple, and all adopt Linear Control, easily realize in engineering, control stability is good.
Accompanying drawing explanation
Fig. 1 is interchange-flexible direct current hybrid power system in prior art.
Fig. 2 is the stream hybrid AC/DC power transmission systems arranged side by side with single time flexible direct current that typically singly backcross.
Fig. 3 is hybrid AC/DC power transmission systems equivalence main circuit diagram in prior art.
Fig. 4 is inverter side novel flexible direct current active power controller theory diagram in the present invention.
Fig. 5 is that in the present invention, inverter side determines ac bus voltage control theory diagram.
Fig. 6 is rectification side constant DC voltage control theory diagram in the present invention.
Fig. 7 is that in the present invention, rectification side determines ac bus voltage control theory diagram.
Fig. 8 is flexible direct current control system inner ring control principle block diagram in the present invention.
Fig. 9 is oscillogram when load is 1100MW in the present invention.
Figure 10 be in the present invention load be 1100MW transition to 900MW time, then by 900MW transition to oscillogram during 1100MW.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, below by specific embodiment and relevant drawings, the present invention will be described in further detail.
Hybrid AC/DC power transmission systems adopts alternating current circuit and flexible direct current circuit side by side to receiving end mains supply, when receiving end causes alternating current circuit to occur that backward power is carried because of reasons such as load reductions, this method by introducing alternating current circuit Feedback of Power and controlling unit in soft straight device active power controller link, the transmission power of soft straight line path is automatically adjusted, and then it is reverse to eliminate the power that alternating current circuit arranged side by side with it occurs, thus solve trend irrational distribution that hybrid AC/DC power transmission systems occurs, problem that network loss increases.
The present embodiment provides a kind of flexible direct current active power controller method for hybrid AC/DC power transmission systems, and transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; During normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by automatically regulating the active power of flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending.
The control method of the active power of described adjustment flexible DC power transmission circuit, can independently apply in each time flexible direct current circuit, introduce alternating current circuit Feedback of Power and controlling unit, when all passive to receiving end from the sending end electrical network electrical network conveying of one or more rounds alternating current circuit power, power when flexible direct current line power runs by rated power or setting normal controls, when occurring when there being alternating current circuit power sending from receiving end electrical network sending end to sending end electrical network, flexible direct current line power reduces, set by close to the performance number needed for actual load, prevent alternating current circuit emergent power reverse, as shown in Figure 4, specifically comprise the following steps:
S01: obtain alternating current circuit active power value P
ac, described alternating current circuit active power value P
actaking from alternating current circuit by substation bus bar place, side, obtaining by measuring, be just to inject receiving end electrical network, and value imported into the control system of flexible direct current converter valve by communication mode;
S02: obtain flexible DC power transmission circuit active power value P
dc, described flexible DC power transmission circuit active power value P
dctaking from the change of current of flexible DC power transmission circuit receiving end inverter side and become exit, obtaining by measuring, be just to inject receiving end electrical network, and value imported into the control system of flexible direct current converter valve by communication mode;
S03: obtain active power bid value; By the alternating current circuit active power value P that described step S01 and step S02 obtains
acwith flexible DC power transmission circuit active power value P
dccarry out algebraically superposition, the value P of gained
addto send in comparator and with the active power reference value P of soft straight device
refcompare, described P
addwith P
refin smaller value be active power bid value P
ord, flexible DC power transmission circuit active power value P
dcwill by P
ordcontrol; Therefore, P is worked as
acfor timing, P
addbe greater than P
ref, now P
ordget P
ref, have P
dc=P
ref; Work as P
acfor time negative, P
addbe less than P
ref, now P
ordget P
add, have P
dc=P
add;
S04: realize active power controller; By the active power bid value P obtained in described step S03
ordactive power controller target in controlling as soft straight device outer shroud, makes the active power of soft straight line path reach bid value by controlling the direct axis component of alternating current.
Preferably, the concrete grammar of described step S04 is: first by described P
ordwith P
dctry to achieve wattful power rate variance P
error, then by described wattful power rate variance P
errorafter FEEDBACK CONTROL link, obtain the reference value i of the alternating current direct axis component after converter valve inversion
dref, by i
drefsend in the interior ring controller of flexible direct current device, by links such as inner ring control, dq inverse transformation and modulation strategies, obtain converter valve trigger impulse, by rectification and the inversion of converter valve, thus make flexible DC power transmission circuit active-power P
dcvalue reaches active power bid value P
ord.
Preferably, described FEEDBACK CONTROL link is linear PI controlling unit.
Below in conjunction with example, the present invention will be described in detail.
Be described for Fig. 2 stream hybrid AC/DC power transmission systems arranged side by side with single time direct current that typically singly backcross, specifically comprise the following steps:
1. emulate the foundation of main circuit.The hybrid AC/DC power transmission systems of analysis chart 2, can obtain the emulation main circuit diagram shown in Fig. 3: sending end electrical network adopts infinitely great ideal source G to carry out equivalence, circuit sending end bus rated voltage V
1for 230kV; Receiving end electrical network is passive network, adopts load model to carry out equivalence, circuit receiving end busbar voltage V
2for 230kV.Flexible direct current main circuit structure adopts traditional pseudo-bipolar flexible direct current main circuit structure, and DC side rated voltage is+320kV.Power in DC line is P
dc, power on alternating current circuit is P
ac.System parameters is chosen by table 1.
Table 1 simulation example system parameters
2. the control of inverter side.Inverter side outer shroud controls, and adopt the novel flexible direct current active power controller of the present invention's proposition and determine ac bus voltage control link, control principle block diagram as shown in Figures 4 and 5.Control principle block diagram shown in Fig. 4 is innovative point of the present invention, by the active power reference value P of soft straight device setting
refwith alternating current-direct current bus power superposition value P
addcompare, get the active power bid value P of smaller value as soft straight device
ord.P
ordwith P
dcafter difference passes through PI controlling unit, generation current direct axis component reference value i
drefsend into inner ring control system.
3. the control of rectification side.Rectification side outer shroud controls, and adopt constant DC voltage control and determine ac bus voltage control link, control principle block diagram as shown in Figure 6 and Figure 7.
4. inner ring controls.The inner ring of rectification side and inverter side controls all to adopt dq shaft current uneoupled control, and control principle block diagram as shown in Figure 8.I in figure
drefand i
qreffor the electric current d-axis that produced by outer shroud control system and quadrature axis component reference value, i
dand i
qfor converter transformer valve side electric current converts the electric current d-axis and quadrature axis component produced by dq, the bridge arm voltage modulating wave ac-dc axis component after being controlled by inner ring needed for generation system, generates modulating wave by dq inverse transformation, feeding valve Triggering Control System.
5. valve trigging control.After producing modulating wave by inner ring control system, valve Triggering Control System adopts phase shift carrier wave to modulate, and triggers after producing trigger impulse to the IGBT in converter valve.
6. simulation process.Carry out simulating, verifying according to step 1 ~ 5 controlling unit, simulation result is as shown in Fig. 9 ~ Figure 10.Supposing the system is initially 1100MW by end load, and during 0.4s, flexible direct current circuit drops into, and significantly vibrates for avoiding producing, initial active power reference value P
refbe set to 0, alternating current circuit power is still 1100MW; P during 0.5s
refbe set to rated power 1000MW, flexible direct current line power is promoted to 1000MW rapidly, and alternating current circuit power reduces to 100MW; 900MW is reduced to by end load during 1.1s, if now DC line power remains unchanged, then alternating current circuit power is-100MW, but owing to have employed the novel flexible direct current active power controller strategy that the present invention proposes, DC line power reduces to 900MW rapidly, alternating current circuit power reduces to 0, prevents condition of giving a present, and system load flow is more reasonable.Increase to 1100MW by end load when 1.3, now DC line power returns to rapidly rated power 1000MW, alternating current circuit power 100MW.
The above simulation results show feasibility of control strategy of the present invention.
Exemplary embodiment is only illustrative, instead of the restriction to scope of the present invention, and scope of the present invention is defined by appended claim.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1., for a flexible direct current active power controller method for hybrid AC/DC power transmission systems, it is characterized in that:
Transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; During normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by automatically regulating the active power of flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending;
The active power of described adjustment flexible DC power transmission circuit comprises the following steps:
S01: obtain alternating current circuit active power value P
ac, described alternating current circuit active power value P
actaking from alternating current circuit by substation bus bar place, side, obtaining by measuring, be just to inject receiving end electrical network, and value imported into the control system of flexible direct current converter valve by communication mode;
S02: obtain flexible DC power transmission circuit active power value P
dc, described flexible DC power transmission circuit active power value P
dctaking from the change of current of flexible DC power transmission circuit receiving end inverter side and become exit, obtaining by measuring, be just to inject receiving end electrical network, and value imported into the control system of flexible direct current converter valve by communication mode;
S03: obtain active power bid value; By the alternating current circuit active power value P that described step S01 and step S02 obtains
acwith flexible DC power transmission circuit active power value P
dccarry out algebraically superposition, the value P of gained
addto send in comparator and with the active power reference value P of soft straight device
refcompare, described P
addwith P
refin smaller value be active power bid value P
ord, flexible DC power transmission circuit active power value P
dcwill by P
ordcontrol; Therefore, P is worked as
acfor timing, P
addbe greater than P
ref, now P
ordget P
ref, have P
dc=P
ref; Work as P
acfor time negative, P
addbe less than P
ref, now P
ordget P
add, have P
dc=P
add;
S04: realize active power controller; By the active power bid value P obtained in described step S03
ordactive power controller target in controlling as soft straight device outer shroud, makes the active power of soft straight device reach bid value by controlling the direct axis component of alternating current.
2. the flexible direct current active power controller method for hybrid AC/DC power transmission systems according to claim 1, it is characterized in that, the concrete grammar of described step S04 is: first by described P
ordwith P
dctry to achieve wattful power rate variance P
error, then by described wattful power rate variance P
errorafter FEEDBACK CONTROL link, obtain the reference value i of the alternating current direct axis component after converter valve inversion
dref, by i
drefsend in the interior ring controller of soft straight device, by inner ring control, dq inverse transformation and modulation strategy link, obtain converter valve trigger impulse, by rectification and the inversion of converter valve, thus make flexible DC power transmission circuit active-power P
dcvalue reaches active power bid value P
ord.
3. the flexible direct current active power controller method for hybrid AC/DC power transmission systems according to claim 2, is characterized in that: described FEEDBACK CONTROL link is linear PI controlling unit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019174999A1 (en) * | 2018-03-13 | 2019-09-19 | Supergrid Institute | Method for controlling an electrical transmission link including a direct current high voltage line |
| FR3079083A1 (en) * | 2018-03-13 | 2019-09-20 | Supergrid Institute | METHOD FOR CONTROLLING AN ELECTRICAL TRANSMISSION LINK INCLUDING A CONTINUOUS HIGH VOLTAGE LINE |
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| CN104518524B (en) * | 2014-12-29 | 2017-01-11 | 南京南瑞继保电气有限公司 | Method and device for controlling power of withdrawn hierarchically connected direct-current transmission valve group |
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| CN106602587B (en) * | 2017-01-13 | 2023-01-24 | 全球能源互联网研究院有限公司 | Additional power control method and device suitable for flexible direct current transmission system |
| CN107069736B (en) * | 2017-04-19 | 2019-08-13 | 国网福建省电力有限公司 | For the urgent Poewr control method of AC/DC Hybrid Transmission System containing flexible direct current |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361329A (en) * | 2011-10-18 | 2012-02-22 | 山东电力研究院 | Modeling method for performing dynamic characteristic research on hybrid alternating current/direct current (AC/DC) transmission system |
| CN103368173A (en) * | 2013-05-21 | 2013-10-23 | 南方电网科学研究院有限责任公司 | Active power flow optimization distribution method for alternating current-direct current parallel system containing flexible direct current transmission |
| CN103618308A (en) * | 2013-11-27 | 2014-03-05 | 南方电网科学研究院有限责任公司 | Alternating current line power flow automatic control method of alternating current and flexible direct current parallel power transmission system |
| CN103701140A (en) * | 2014-01-06 | 2014-04-02 | 国家电网公司 | Dynamic reactive power reserve optimization method for improving transient voltage stability of alternating-current and direct-current power grid |
-
2014
- 2014-07-11 CN CN201410329502.9A patent/CN104124689B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361329A (en) * | 2011-10-18 | 2012-02-22 | 山东电力研究院 | Modeling method for performing dynamic characteristic research on hybrid alternating current/direct current (AC/DC) transmission system |
| CN103368173A (en) * | 2013-05-21 | 2013-10-23 | 南方电网科学研究院有限责任公司 | Active power flow optimization distribution method for alternating current-direct current parallel system containing flexible direct current transmission |
| CN103618308A (en) * | 2013-11-27 | 2014-03-05 | 南方电网科学研究院有限责任公司 | Alternating current line power flow automatic control method of alternating current and flexible direct current parallel power transmission system |
| CN103701140A (en) * | 2014-01-06 | 2014-04-02 | 国家电网公司 | Dynamic reactive power reserve optimization method for improving transient voltage stability of alternating-current and direct-current power grid |
Non-Patent Citations (1)
| Title |
|---|
| 特高压交直流混合电网协调电压控制策略及仿真研究;陈江澜等;《电力系统保护与控制》;20140601;第42卷(第11期);第21-26页 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019174999A1 (en) * | 2018-03-13 | 2019-09-19 | Supergrid Institute | Method for controlling an electrical transmission link including a direct current high voltage line |
| FR3079083A1 (en) * | 2018-03-13 | 2019-09-20 | Supergrid Institute | METHOD FOR CONTROLLING AN ELECTRICAL TRANSMISSION LINK INCLUDING A CONTINUOUS HIGH VOLTAGE LINE |
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| CN104124689A (en) | 2014-10-29 |
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