CN102280887B - Voltage regulator connecting and disconnecting method of electric power system - Google Patents
Voltage regulator connecting and disconnecting method of electric power system Download PDFInfo
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- CN102280887B CN102280887B CN 201110256579 CN201110256579A CN102280887B CN 102280887 B CN102280887 B CN 102280887B CN 201110256579 CN201110256579 CN 201110256579 CN 201110256579 A CN201110256579 A CN 201110256579A CN 102280887 B CN102280887 B CN 102280887B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 11
- 238000010977 unit operation Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
The invention relates to a voltage regulator connecting and disconnecting method of an electric power system. At present, a generator excitation regulator aims to control the end voltage of a generator and has defect of a factor that more reactive power is needed to improve the stability of system voltage when a powder grid has fault. According to the voltage regulator connecting and disconnecting method disclosed by the invention, the system voltage takes part in the control of the generator excitation regulator through a voltage regulator, and the voltage regulator is disconnected during excitation, synchronization and separation of a generator; when the electric power system only has one system voltage measurement unit, the voltage regulator can be automatically disconnected when the system voltage measuring unit has fault; when the electric power system has two system voltage measuring units, the other system voltage measuring unit is converted to run when one system voltage measuring unit has fault; and when the two system voltage measuring unit have fault at the same, the voltage regulator is automatically disconnected. The undisturbed connection and disconnection of the voltage regulator of the electric power system are finished by the safe and reliable method disclosed by the invention, thus the reactive power of the generator and the large disturbance of generator voltage and system voltage are avoided.
Description
Technical field
The present invention relates to the parameter tuning in the electric power system, specifically a kind of power system voltage adjuster drops into the method that withdraws from.
Background technology
At present, automatic excitation adjustor of generator all is that to control generator terminal voltage be target, needs more reactive powers have deficiency to improve aspect the system voltage stability at electric network fault.If drawing-in system voltage (becoming high side voltage as generator main) participates in the control of automatic excitation adjustor of generator, voltage with control generator machine end outer certain a bit (as high voltage bus or a certain interior point of step-up transformer) is target, reactance that can the compensated dynamo step-up transformer makes power plant high-voltage side bus voltage (claiming system voltage again) maintain higher level, increase the reactive power limiting value of generator output, reach the purpose that improves power system voltage stabilization.
Summary of the invention
Technical problem to be solved by this invention is to overcome the problem that above-mentioned prior art exists, provide a kind of power system voltage adjuster to drop into the method that withdraws from, system voltage participates in the control of automatic excitation adjustor of generator by voltage regulator, the present invention solves the generator reactive fluctuation problem that may occur when voltage regulator drops into or withdraws from, so that generator voltage and significantly disturbance of system voltage to take place.
For this reason, the present invention adopts following technical scheme: the power system voltage adjuster drops into the method that withdraws from, it is characterized in that described voltage regulator withdraws from control unit by system voltage measuring unit, the given unit of system voltage, comprehensive comparing unit, lead-lag amplifying unit, output violent change unit and input and forms, obtain system voltage U by the system voltage measuring unit
s, by the system voltage set-point U of system voltage given unit acquisition
Sgd, by comprehensive comparing unit with system voltage U
sWith system voltage set-point U
SgdMake comparisons, obtain voltage difference U
Sgd-U
s, this voltage difference U
Sgd-U
sBehind the lead-lag amplifying unit, obtain output signal, again output violent change U as a result behind the output violent change unit
Psvr, withdraw from behind the control unit output violent change U as a result finally by input
PsvrTo field regulator control exciting current, make system voltage maintain the stable operation scope;
The power system voltage adjuster drops into and withdraws from method, and it thes contents are as follows:
1) during generator excitation, simultaneous interconnecting and off-the-line, withdraw from voltage regulator, before the artificial input of voltage regulator, the system voltage set-point U of voltage regulator
SgdThe automatic tracking system voltage U
sManually withdraw from moment, with the be added to generator voltage set-point U of field regulator of the output valve of voltage regulator before 4 execution cycles
GdOn, be limited to 1.1p.u. on the voltage regulator set-point, be limited to 0.95p.u. under the voltage regulator set-point;
2) when electric power system has only a system voltage measuring unit, withdraw from voltage regulator automatically during system voltage measuring unit fault, withdraw from moment, the output valve of voltage regulator is added on the set-point of field regulator immediately;
3) when electric power system has two system voltage measuring units, when a system voltage measuring unit fault, switch to another system voltage measuring unit operation; When disconnection fault takes place in two system voltage measuring units simultaneously, withdraw from voltage regulator automatically, withdraw from moment, the output valve of voltage regulator is added on the set-point of field regulator immediately.
4) behind the generator connecting in parallel with system, field regulator is in voltage close loop control mode operation, and a situation arises just allows to drop into the power system voltage adjuster down in the excitation restriction.
The present invention finishes the undisturbed input of power system voltage adjuster with safe and reliable method and withdraws from, and avoids taking place the significantly disturbance of generator reactive, generator voltage and system voltage.
The invention will be further described below in conjunction with specification drawings and specific embodiments.
Description of drawings
Fig. 1 contains the field regulator Mathematical Modeling figure (model of expression voltage regulator in the top frame of broken lines, the model of expression field regulator in the following frame of broken lines) of power system voltage adjuster for the present invention.
Fig. 2 is the schematic diagram of voltage regulator of the present invention.
The PSVR input withdrawal control method that Fig. 3 proposes for not adopting the present invention, the set end voltage that when system voltage measuring unit fault withdraws from PSVR, causes fluctuation situation.
The PSVR input withdrawal control method that Fig. 4 proposes for adopting the present invention, the set end voltage that when system voltage measuring unit fault withdraws from PSVR, causes fluctuation situation.
Among the figure, U
g-generator voltage, U
Gd-generator terminal voltage set-point, U
s-system voltage, U
Sgd-system voltage is given, U
UEL-low encouraging limited output, and V/Hz_out is V/Hz restriction output, U
Tc-transfer the difference ring joint to export U
Test-step test input, U
SSThe output of-power system stabilizer, PSS, U
OEL-cross and encourage restriction output, U
PSVRThe output of-power system voltage adjuster, K
Avr-automated manner control multiplication factor, K
PSVR-power system voltage adjuster multiplication factor.S is multiple variable frequently, and Ts1, Ts2, Ts3 are power system voltage regulator phases make-up time constant, and TA1, TA2, TA3, TA4 are field regulator lead-lag time constant.
Embodiment
Shown in Fig. 1-2, described voltage regulator withdraws from control unit 6 by system voltage measuring unit 1, the given unit 2 of system voltage, comprehensive comparing unit 3, lead-lag amplifying unit 4, output violent change unit 5 and input to be formed, and obtains system voltage U by the system voltage measuring unit
s, by the system voltage set-point U of system voltage given unit acquisition
Sgd, by comprehensive comparing unit with system voltage U
sWith system voltage set-point U
SgdMake comparisons, obtain voltage difference U
Sgd-U
s, this voltage difference U
Sgd-U
sBehind the lead-lag amplifying unit, obtain output signal, again output violent change U as a result behind the output violent change unit
Psvr, withdraw from behind the control unit output violent change U as a result finally by input
PsvrTo field regulator control exciting current, make system voltage maintain the stable operation scope.
System voltage participates in generator excitation control by voltage regulator (hereinafter to be referred as PSVR), and the method that the voltage regulator input withdraws from is as follows:
1) during generator excitation, simultaneous interconnecting and off-the-line, withdraws from the power system voltage adjuster;
2) whether the generator outlet circuit breaker closes the position and whether dynamo current judges greater than 80% whether generator is incorporated into the power networks greater than 10% rated current of generator simultaneity factor voltage by detecting, after confirming the generator connecting in parallel with system operation, if need the artificial voltage regulator that drops into, check the system voltage set-point U of voltage regulator
SgdWith system voltage U
sAfter the unanimity, drop into voltage regulator;
3) manually withdraw from moment, with the be added to generator voltage set-point U of field regulator of the output valve of voltage regulator before 4 execution cycles
GdOn, be limited to 1.1p.u. on the voltage regulator set-point, be limited to 0.95p.u. under the voltage regulator set-point;
4) when electric power system has only a system voltage measuring unit, withdraw from voltage regulator automatically during system voltage measuring unit fault, withdraw from moment, the output valve of voltage regulator is added on the set-point of field regulator immediately;
5) when electric power system has two system voltage measuring units, when a system voltage measuring unit fault, switch to another system voltage measuring unit operation; When two system voltage measuring units break down simultaneously, withdraw from voltage regulator automatically, withdraw from moment, the output valve of voltage regulator is added on the set-point of field regulator immediately.
Whether Fig. 3 and Fig. 4 are respectively when adopting voltage regulator that the application proposes to drop into withdrawal control method, voltage regulator drops into can cause the generator terminal voltage fluctuation when withdrawing from, as cause the set end voltage fluctuation when system voltage measuring unit fault withdraws from PSVR.Fig. 3 causes the set end voltage fluctuation when system voltage measuring unit fault withdraws from PSVR.It is very little that Fig. 4 withdraws from PSVR voltage undulation on opportunity in system voltage measuring unit fault.
Claims (1)
1. the power system voltage adjuster drops into the method that withdraws from, it is characterized in that described voltage regulator withdraws from control unit by system voltage measuring unit, the given unit of system voltage, comprehensive comparing unit, lead-lag amplifying unit, output violent change unit and input and forms, obtain system voltage U by the system voltage measuring unit
s, by the system voltage set-point U of system voltage given unit acquisition
Sgd, by comprehensive comparing unit with system voltage U
sWith system voltage set-point U
SgdMake comparisons, obtain voltage difference U
Sgd-U
s, this voltage difference U
Sgd-U
sBehind the lead-lag amplifying unit, obtain output signal, again output violent change U as a result behind the output violent change unit
Psvr, withdraw from behind the control unit output violent change U as a result finally by input
PsvrTo field regulator control exciting current, make system voltage maintain the stable operation scope; It is as follows that the input of voltage regulator withdraws from method:
1) during generator excitation, simultaneous interconnecting and off-the-line, withdraw from voltage regulator, before the artificial input of voltage regulator, the system voltage set-point U of voltage regulator
SgdThe automatic tracking system voltage U
sManually withdraw from moment, with the be added to generator voltage set-point U of field regulator of the output valve of voltage regulator before 4 execution cycles
GdOn, be limited to 1.1p.u. on the voltage regulator set-point, be limited to 0.95p.u. under the voltage regulator set-point;
2) when electric power system has only a system voltage measuring unit, withdraw from voltage regulator automatically during system voltage measuring unit fault, withdraw from moment, the output valve of voltage regulator is added on the set-point of field regulator immediately;
3) when electric power system has two system voltage measuring units, when a system voltage measuring unit fault, switch to another system voltage measuring unit operation; When two system voltage measuring units break down simultaneously, withdraw from voltage regulator automatically, withdraw from moment, the output valve of voltage regulator is added on the set-point of field regulator immediately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110256579 CN102280887B (en) | 2011-09-01 | 2011-09-01 | Voltage regulator connecting and disconnecting method of electric power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110256579 CN102280887B (en) | 2011-09-01 | 2011-09-01 | Voltage regulator connecting and disconnecting method of electric power system |
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| CN102280887A CN102280887A (en) | 2011-12-14 |
| CN102280887B true CN102280887B (en) | 2013-09-18 |
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| CN 201110256579 Active CN102280887B (en) | 2011-09-01 | 2011-09-01 | Voltage regulator connecting and disconnecting method of electric power system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664420A (en) * | 2012-05-09 | 2012-09-12 | 河北省电力研究院 | Method for judging reactive power oscillation source of power grid |
| WO2014026314A1 (en) * | 2012-08-13 | 2014-02-20 | 国电南瑞科技股份有限公司 | Method for coordinating and controlling primary ring and auxiliary ring of generator excited system |
| CN104849661B (en) * | 2015-05-21 | 2018-01-05 | 中国大唐集团科学技术研究院有限公司华东分公司 | Synchronous generator adjusts the method for testing of main transformer high side bus voltage ability |
| CN108242810A (en) * | 2018-02-01 | 2018-07-03 | 浙江浙能技术研究院有限公司 | A kind of AVC and PSVR control method for coordinating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2497486Y (en) * | 2001-05-10 | 2002-06-26 | 于静 | Switch type field regulator |
| CN2569445Y (en) * | 2002-08-23 | 2003-08-27 | 西安理工大学 | Field regulator of synchronous generator |
| CN101272116A (en) * | 2008-04-30 | 2008-09-24 | 山东电力研究院 | Modeling method of generator excitation system |
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Owner name: THE TECHNICAL SERVICE CENTER OF ZHEJIANG ELECTRIC Free format text: FORMER OWNER: THE TECHNICAL SERVICE CENTER OF ZHEJIANG ELECTRIC POWER EXPERIMENT RESEARCH INSTITUTE Effective date: 20121214 Owner name: THE ELECTRIC POWER RESEARCH INSTITUTE OF ZHEJIANG Free format text: FORMER OWNER: ZHEJIANG ELECTRIC POWER TEST AND RESEARCH INSITITUTE Effective date: 20121214 |
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Effective date of registration: 20121214 Address after: The eight district of Hangzhou city in Zhejiang province 310014 Huadian Zhaohui under No. 1 Lane Applicant after: Electric Power Science Research Institute of Zhejiang Electric Power Company Applicant after: The Technical Service Center of Zhejiang Electric Power Experiment Research Institute Applicant after: State Grid Corporation of China Address before: The eight district of Hangzhou city in Zhejiang province 310014 Huadian Zhaohui under No. 1 Lane Applicant before: Zhejiang Electric Power Test And Research Insititute Applicant before: The Technical Service Center of Zhejiang Electric Power Experiment Research Institute |
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