CN110346718A - A kind of synchronous generator d axis parameter testing and discrimination method - Google Patents
A kind of synchronous generator d axis parameter testing and discrimination method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/34—Testing dynamo-electric machines
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Abstract
The present invention relates to Parameter Estimation of Synchronous Machines fields, more particularly to a kind of synchronous generator d axis parameter testing and discrimination method, step include: only send out idle in generator, scene carries out load dump test under the active specific operation for being zero, record the change curve of stator voltage at this time, excitation voltage, exciting current, the change curve of active power, reactive power；It is established and the consistent simulation model of actual condition using BPA simulation software；Carry out cutting load using BPA simulation software to test, generator unit stator voltage, excitation voltage, exciting current data in acquisition simulation process；It adjusts separately d axis Steady-state Parameters, transient state parameter, secondary transient state parameter to be emulated, substep Curve fitting simulation curve and measured curve, finally recognizes generator d axis full set parameter.The present invention is recognized by field test with the method that emulation combines, and has fully considered the variation of the exciting current in load dump test dynamic process, the parameter of identification is more accurate.
Description
Technical field
The present invention relates to Parameter Estimation of Synchronous Machines fields, and in particular to a kind of synchronous generator d axis parameter testing and
Discrimination method.
Background technique
Synchronous generator is most important one kind equipment in electric system.Whether reasonable, model parameter is generator model
It is no accurate, the credibility of Power System Stability Analysis result is not only directly affected, but also directly affect such as power system stability
Device (Power system stabilizer, PSS) etc. controls the control strategy design of equipment.
The parameter of synchronous generator can be determined by following three kinds of modes: calculate ginseng using the information in design of electrical motor stage
Number, choose handbook in typical data, under certain research technique, according to the motor response data System Discrimination of measurement
Method estimates parameter.Compared with first two determines the mode of parameter, the third mode has more realistic meaning.This is because: nothing
By being canonical parameter on design of electrical motor data or handbook, all there may be bigger difference with the parameter under practical operation situation,
So as to cause the result and actual conditions grave fault of simulation analysis；In service life, the parameter of generator is not to fix not
Become, due to factors such as physical material aging, overhauls, parameter will change, and with the means of identification, can relatively easily obtain
To the parameter value of continuous renewal；It, can with measurement data with the development of system identification theory, measuring technique and test method
Obtain accurate parameter value.
Industry and academia all take much count of the parameter identification work of synchronous generator.The North America electric reliability committee
(North American Electric Reliability Council, NERC) requires its industry member regularly to test
Generator parameter.International Electrotechnical Commission (International Electrotechnical Commission, IEC) and beauty
State's Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers,
IEEE standard IEC 34-4 and the IEEE Std 115 for generator parameter test) has been published respectively.The newest state that China promulgates
In family standard GB/T1029-2005, the method that alsies specify parameter testing.The end of the seventies in last century, U.S. professor Demello mentioned
Going out the method for carrying out generator parameter test using removal of load method, removal of load method clear physics conception, field test are easy, and
And consider saturation effect etc. and influence, a kind of method for practical of can yet be regarded as.Generator parameter identification based on removal of load method
Method it is most basic be graphic-arts technique, be common method in Practical Project.But for from shunt dynamo, although in removal of load
During test, field regulator is in permanent excitation con-trol mode, but exciting current will change during its test,
It is very difficult accurately to find out characteristic point from response curve using graphic-arts technique in this case.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of synchronous generator d axis parameter testing and discrimination methods, specifically
Technical solution is as follows:
A kind of synchronous generator d axis parameter testing and discrimination method, comprising the following steps:
S1: only sending out idle in generator, scene carries out load dump test under the active specific operation for being zero, records stator at this time
Voltage, excitation voltage, exciting current, the change curve of active power, reactive power change curve；
S2: it is established and the consistent simulation model of actual condition, including generator basic parameter, excitation system using BPA simulation software
System model, load model, cutting load model；
S3: using BPA simulation software carry out cutting load test, obtain simulation process in generator unit stator voltage, excitation voltage,
Exciting current data；
S4: adjusting separately d axis Steady-state Parameters, transient state parameter, secondary transient state parameter and emulated, substep Curve fitting simulation curve and actual measurement
Curve finally recognizes generator d axis full set parameter.
Preferably, the step S1 specifically includes the following steps:
S11: generator is made to be in grid connection state；
S12: the active power of generator is adjusted close to 0MW, reactive power is about 30% rated reactive power；
S13: it adjusts field regulator and is in MANUAL CONTROL mode；
S14: generator outlet breaker is disconnected, while recording the change of stator voltage, excitation voltage, exciting current, active power
Change the change curve of curve, reactive power.
Preferably, the step S2 specifically includes the following steps:
S21: one machine infinity bus system trend is established using BPA Load Flow Program；
S22: and then simulation model identical with actual condition is established using BPA stability program；
S23: with the value nodes such as the locking adopted Infinite bus system of BS, the locking justice PQ node of B, the locking adopted route of L in BPA Load Flow Program
Data fill in corresponding card content according to actual condition；
S24: with the locking adopted Infinite bus system of MC, the locking adopted generator basic parameter of M, MF, excitation system in BPA stability program
Model selection E* card is inputted the test data of live excitation voltage as a curve；
S25: using the locking adopted load model of LB, LS card realizes cutting load operation, then fills in phase according to live actual condition
The card content answered.
Preferably, the step S4 specifically includes the following steps:
S41: cutting load will be carried out using producer's given parameters and emulates resulting stator voltage data and the progress of field measurement data
Comparison fitting；
Then S42: d axis reactance xd in adjustment simulation model is emulated, until gained emulation data and field measurement data exist
The fitting of stable state section is consistent, then d axis reactance xd data adjusted are accurate parameters；
S43: similarly, adjusting d axis transient state reactance xd' in simulation model, then emulated, until gained emulation data and scene
Measured data is consistent in the fitting of transient state section, then d axis transient state reactance xd' data adjusted are accurate parameters；
S44: similarly, d axis subtranient reactance xd ", rotor windings time constant in simulation model are adjustedT d0 '、When super transition is opened a way
Between constant Td0 ", then emulated, until gained emulation data and field measurement data are consistent in the fitting of secondary transient state section, then adjusted
D axis subtranient reactance xd " after whole, rotor windings time constantT d0 '、Super transition open circuit time constant Td0 " data are accurate
Parameter；
S45: generator d axis full set parameter to sum up then can accurately be picked out.
The invention has the benefit that the present invention is by field test with emulating the method that combines to synchronous generator
D axis parameter is recognized, and the variation of the exciting current in load dump test dynamic process has been fully considered, compared to traditional
The parameter of graphic-arts technique discrimination method, identification is more accurate.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Fig. 2 is d axis load dump test stator voltage, excitation voltage waveform diagram；
Fig. 3 is BPA d axis simulation recognition parameter, graphic-arts technique identified parameters and measured waveform comparison diagram.
Specific embodiment
In order to better understand the present invention, the present invention will be further explained below with reference to the attached drawings and specific examples:
As shown in Figure 1, a kind of synchronous generator d axis parameter testing and discrimination method, comprising the following steps:
S1: only sending out idle in generator, scene carries out load dump test under the active specific operation for being zero, records stator at this time
Voltage, excitation voltage, exciting current, the change curve of active power, reactive power change curve.Specifically include following step
It is rapid:
S11: generator is made to be in grid connection state；
S12: the active power of generator is adjusted close to 0MW, reactive power is about 30% rated reactive power；
S13: it adjusts field regulator and is in MANUAL CONTROL mode；
S14: generator outlet breaker is disconnected, while recording the change of stator voltage, excitation voltage, exciting current, active power
Change the change curve of curve, reactive power.Test data is as shown in Figure 2.
S2: using BPA simulation software establish with the consistent simulation model of actual condition, including generator basic parameter, encourage
Magnetic system model, load model, cutting load model.Specifically includes the following steps:
S21: one machine infinity bus system trend is established using BPA Load Flow Program；
S22: and then simulation model identical with actual condition is established using BPA stability program；
S23: with the value nodes such as the locking adopted Infinite bus system of BS, the locking justice PQ node of B, the locking adopted route of L in BPA Load Flow Program
Data fill in corresponding card content according to actual condition；
S24: with the locking adopted Infinite bus system of MC, the locking adopted generator basic parameter of M, MF, excitation system in BPA stability program
Model selection E* card is inputted the test data of live excitation voltage as a curve；Wherein, it is generated electricity using the locking justice of M, MF
Producer's given parameters are filled in when machine basic parameter first；
S25: using the locking adopted load model of LB, LS card realizes cutting load operation, then fills in phase according to live actual condition
The card content answered.
S3: carrying out cutting load using BPA simulation software and test, and obtains generator unit stator voltage, the excitation in simulation process
Voltage, exciting current data, emulation data and measured waveform fitting comparing result are as shown in Figure 3.
S4: the method combined based on field measurement with BPA emulation carries out generator d axis parameter identification, and it is steady to adjust separately d axis
State parameter, transient state parameter, secondary transient state parameter are emulated, and substep Curve fitting simulation curve and measured curve finally recognize power generation
Machine d axis full set parameter.Specifically includes the following steps:
S41: cutting load will be carried out using producer's given parameters and emulates resulting stator voltage data and the progress of field measurement data
Comparison fitting；
Then S42: d axis reactance xd in adjustment simulation model is emulated, until gained emulation data and field measurement data exist
The fitting of stable state section is consistent, then d axis reactance xd data adjusted are accurate parameters；
S43: similarly, adjusting d axis transient state reactance xd' in simulation model, then emulated, until gained emulation data and scene
Measured data is consistent in the fitting of transient state section, then d axis transient state reactance xd' data adjusted are accurate parameters；
S44: similarly, d axis subtranient reactance xd ", rotor windings time constant in simulation model are adjustedT d0 '、When super transition is opened a way
Between constant Td0 ", then emulated, until gained emulation data and field measurement data are consistent in the fitting of secondary transient state section, then adjusted
D axis subtranient reactance xd " after whole, rotor windings time constantT d0 '、Super transition open circuit time constant Td0 " data are accurate
Parameter；
S45: generator d axis full set parameter to sum up then can accurately be picked out.
Traditional pattern recognition method can not accurately find out stable state, transient state, the spy in secondary transient state each stage on trial curve
Point is levied, d axis relevant parameter can not be accurately calculated, and uses field test with emulating the method combined, can really be reflected existing
Field actual operating mode, has carried out d axis parameter identification with certain hydraulic turbine, the parameter picked out is as shown in table 1, can see in conjunction with Fig. 3
The initial parameter that simulation recognition parameter is picked out compared to traditional graph method out illustrates to pick out closer to field measurement waveform
Parameter is more accurate, more meets actual operating mode, illustrates that the parameter of identification is more accurate.
1 d axis identified parameters of table
| D/q axis parameter | The parameter that graphic-arts technique picks out | Simulation recognition parameter |
| x d | 1.01 | 1.09 |
| x d ' | 0.354 | 0.364 |
| x d " | 0.29 | 0.32 |
| T d0 ' | 6.96 | 7.28 |
| T d0 " | 0.132 | 0.05 |
The present invention is not limited to above-described specific embodiment, the foregoing is merely preferable case study on implementation of the invention
, it is not intended to limit the invention, any modifications, equivalent replacements, and improvements done within the spirit and principles of the present invention
Deng should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of synchronous generator d axis parameter testing and discrimination method, it is characterised in that: the following steps are included:
S1: only sending out idle in generator, scene carries out load dump test under the active specific operation for being zero, records stator at this time
Voltage, excitation voltage, exciting current, the change curve of active power, reactive power change curve；
S2: it is established and the consistent simulation model of actual condition, including generator basic parameter, excitation system using BPA simulation software
System model, load model, cutting load model；
S3: using BPA simulation software carry out cutting load test, obtain simulation process in generator unit stator voltage, excitation voltage,
Exciting current data；
S4: adjusting separately d axis Steady-state Parameters, transient state parameter, secondary transient state parameter and emulated, substep Curve fitting simulation curve and actual measurement
Curve finally recognizes generator d axis full set parameter.
2. a kind of synchronous generator d axis parameter testing according to claim 1 and discrimination method, it is characterised in that: described
Step S1 specifically includes the following steps:
S11: generator is made to be in grid connection state；
S12: the active power of generator is adjusted close to 0MW, reactive power is about 30% rated reactive power；
S13: it adjusts field regulator and is in MANUAL CONTROL mode；
S14: generator outlet breaker is disconnected, while recording the change of stator voltage, excitation voltage, exciting current, active power
Change the change curve of curve, reactive power.
3. a kind of synchronous generator d axis parameter testing according to claim 1 and discrimination method, it is characterised in that: described
Step S2 specifically includes the following steps:
S21: one machine infinity bus system trend is established using BPA Load Flow Program；
S22: and then simulation model identical with actual condition is established using BPA stability program；
S23: with the value nodes such as the locking adopted Infinite bus system of BS, the locking justice PQ node of B, the locking adopted route of L in BPA Load Flow Program
Data fill in corresponding card content according to actual condition；
S24: with the locking adopted Infinite bus system of MC, the locking adopted generator basic parameter of M, MF, excitation system in BPA stability program
Model selection E* card is inputted the test data of live excitation voltage as a curve；
S25: using the locking adopted load model of LB, LS card realizes cutting load operation, then fills in phase according to live actual condition
The card content answered.
4. a kind of synchronous generator d axis parameter testing according to claim 1 and discrimination method, it is characterised in that: described
Step S4 specifically includes the following steps:
S41: cutting load will be carried out using producer's given parameters and emulates resulting stator voltage data and the progress of field measurement data
Comparison fitting；
Then S42: d axis reactance xd in adjustment simulation model is emulated, until gained emulation data and field measurement data exist
The fitting of stable state section is consistent, then d axis reactance xd data adjusted are accurate parameters；
S43: similarly, adjusting d axis transient state reactance xd' in simulation model, then emulated, until gained emulation data and scene
Measured data is consistent in the fitting of transient state section, then d axis transient state reactance xd' data adjusted are accurate parameters；
S44: similarly, d axis subtranient reactance xd ", rotor windings time constant in simulation model are adjustedT d0 '、When super transition is opened a way
Between constant Td0 ", then emulated, until gained emulation data and field measurement data are consistent in the fitting of secondary transient state section, then adjusted
D axis subtranient reactance xd " after whole, rotor windings time constantT d0 '、Super transition open circuit time constant Td0 " data are accurate
Parameter；
S45: generator d axis full set parameter to sum up then can accurately be picked out.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110927572A (en) * | 2019-11-26 | 2020-03-27 | 广西电网有限责任公司电力科学研究院 | Generator low excitation limit fixed value determination method based on mapping method |
| CN113824233A (en) * | 2021-09-10 | 2021-12-21 | 中船重工电机科技股份有限公司 | Time constant adjusting method based on simulation motor rotor winding end structure |
| CN114925541A (en) * | 2022-06-06 | 2022-08-19 | 广东电网有限责任公司 | Method, device, terminal and medium for identifying modeling parameters of wind turbine generator control device |
| CN115166512A (en) * | 2022-06-10 | 2022-10-11 | 内蒙古大唐国际托克托发电有限责任公司 | Synchronous motor parameter revision identification method based on generator asynchronous self-excitation test and unit shafting torsional vibration transient test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110927572A (en) * | 2019-11-26 | 2020-03-27 | 广西电网有限责任公司电力科学研究院 | Generator low excitation limit fixed value determination method based on mapping method |
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| CN115166512A (en) * | 2022-06-10 | 2022-10-11 | 内蒙古大唐国际托克托发电有限责任公司 | Synchronous motor parameter revision identification method based on generator asynchronous self-excitation test and unit shafting torsional vibration transient test |
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