CN104730936B - Electromechanical transient model actual measuring and modeling method for nuclear power unit 39-phase self-excitation brushless excitation system - Google Patents
Electromechanical transient model actual measuring and modeling method for nuclear power unit 39-phase self-excitation brushless excitation system Download PDFInfo
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Abstract
The invention relates to an electromechanical transient model actual measuring and modeling method for a nuclear power unit 39-phase self-excitation brushless excitation system. Based on structure characteristics of the nuclear power unit 39-phase self-excitation brushless excitation system and static and dynamic test actually measured data, model parameters for power system electromechanical transient analysis are obtained, and verification is carried out on model precision in the stable analysis process. The method solves the problem that a nuclear power unit multi-phase rectifier brushless excitation system lacks calculation model parameters according with actual situations, the precision when an electromechanical transient program calculates nuclear power unit features can be effectively improved, and powerful supporting is provided for safe and stable operation of a power grid.
Description
Technical field
The present invention relates to field of power, and in particular to a kind of nuclear power generating sets 39 mutually encourage oneself brushless excitation system electromechanics temporarily
States model actual-measurement modeling method.
Background technology
With the development of social economy, Electricity Demand is continuously increased, and the energy is relatively in short supply with traditional Coal-fired Thermal Power machine
The contradiction of a large amount of disposals of pollutants of group.Nuclear energy is the modern energy that can on a large scale substitute conventional energy resource, has not only been cleaned but also Jing
Ji.Because of atmosphere polluting problem, Construction of Nuclear Electricity is just being restarted in current China.According to《Chinese Nuclear Power Long-and Medium-term Development is planned》2015 I
State's nuclear power installed capacity reaches 40,000,000 kilowatts, is building 18,000,000 kilowatts；The year two thousand twenty planning installed capacity reaches 58,000,000 kilowatts,
Building 30,000,000 kilowatts.In technical field of nuclear power, nuclear power generating sets operation is high to excitation system reliability requirement.To 1,011,000
More than for jumbo nuclear power generating sets, poly phase rectification self-excitation brushless excitation system because have shafting it is short, without rotor ring, multiphase
Many advantages, such as rectification reliability height, life-span length, undoubtedly becomes first-selected excitation system.
The current poly phase rectification brushless exciter in nuclear power application is brushless with the TKJ series that French Alstom companies produce
Exciter is representative.The P320 V2 types field regulators of French Alstom companies production are mutually brushless with TKJ 167-45 types 39 to encourage
The self-excitation brushless excitation system that magnetomechanical is combined is in China's Ningde nuclear power, Fuqing nuclear power, ridge Australia nuclear power, Fan family mountain nuclear power, red
Along the river all there is application on 16 nuclear power generating sets such as nuclear power.The operation of this poly phase rectification self-excitation brushless excitation unit and to relate to net stable
Control characteristic is very different with the fired power generating unit of conventional three-machine excitation system, is power system and core under research fault disturbance
The dynamic behaviour and the interphase interaction of machine net of group of motors and influence each other, set up can the self-excitation of accurate response advanced Nuclear Power unit it is brushless
The phantom of excitation system dynamic characteristic simultaneously proposes that a set of feasible measurement technology is very necessary.However, for multiphase
Armature terminal is much more compared with three-phase brushless exciter for rectification brushless exciter, and and rotate with rotor, armature voltage cannot
Measurement, this causes technical difficulty to the parameter actual measurement modeling of nuclear power brushless excitation system.
The content of the invention
The brushless excitation system machine-electricity transient model actual measurement it is an object of the invention to provide a kind of nuclear power generating sets 39 are mutually encouraged oneself
Modeling method.
For achieving the above object, the technical scheme is that：A kind of nuclear power generating sets 39 are mutually encouraged oneself brushless excitation system machine
Electric transient Model actual-measurement modeling method, the construction featuress of brushless excitation system of mutually being encouraged oneself according to nuclear power generating sets 39, abstract simplification goes out
Nuclear power generating sets excitation system electromechanical transient stability Calculation model, then carries out corresponding static, dynamic test, tests its each point of ring
Section model parameter, and check whether each Link Model parameters precision meets electricity by contrasting the method for measured result and simulation result
Force system analysis needs.
In embodiments of the present invention, methods described specifically includes following steps,
Step 101：Field regulator, three-phase controllable silicon power amplification unit, 39 phases in input nuclear power generating sets excitation system
The physical arrangement and design parameter of brushless exciter and electromotor, forms excitation system initial model；
Step 102：According to excitation system initial model, the identifiability of its model parameter is analyzed, the ginseng high to differentiability
Number carries out actual measurement identification, and the parameter low to differentiability is fitted identification；
Step 103：In unit resting state, the set end voltage measurement links time is included to field regulator model parameter
ConstantT R , amplitude limit link enter line parameter actual measurement, spectral characteristic test is carried out to PID loop section logical structure and parameter；
Step 104：According to static measured data to field regulator pid parameter, set end voltage measurement links time constantT R , amplitude limit link parameter recognized；
Step 105：Generator excitation voltage reference value, exciter are calculated according to electromotor and exciter no load saturation characteristic
Exciting current reference value, exciter excitation voltage reference value, electromotor and exciter saturation coefficient, according to exciter load characteristic
Calculate armature of exciter reaction demagnetization coefficient；
Step 106：Power of controlled silicon is calculated according to Cosine Phase-shift principle and amplifies phase shift link theoretical gain, and by separate excitation
Unloaded little step is verified；
Step 107：Electromotor is boosted near 70% rated voltage under separate excitation idle condition, is enrolled by inversion field suppression
Generator voltage decline curve is surveyed to electromotor d-axis open circuit time constant；
Step 108：Electromotor carries out open loop and determines the test of angle step under the unloaded low saturation operating mode of separate excitation, produces exciter
Excitation voltage step signal, admission exciter excitation voltage, the change curve of exciting current of exciter；
Step 109：Ignore electromotor and exciter saturated characteristic, set up 39 phase brushless exciters and electromotor electromechanical transient
Simplified model, is input into the step form consistent with exciter excitation voltage in angle step is determined, and obtains exciting current of exciter sound
Characteristic is answered, it is normal to 39 phase brushless exciter idle times according to exciting current of exciter change measured curve in angle step is determined
Number carries out time domain identification；
Step 110：The unloaded big step response actual measurement of closed loop under DCgenerator motor field system self-excitation mode is carried out, nuclear power excitation is calculated
System export-restriction value；
Step 111：The unloaded little step response actual measurement of closed loop under the self-excitation mode of DCgenerator motor field system is carried out, test data is made
The foundation whether qualified to judge modeling accuracy；
Step 112：The result of combination step 104, step 105, step 106, step 107, step 109 and step 110, shape
Into complete nuclear power generating sets excitation system model parameter；
Step 113：Nuclear power generating sets excitation system simulation example is set up, simulation calculation is carried out to the measured data of step 111,
It is as qualified that result of calculation meets predetermined error criterion, if being unsatisfactory for, return to step 104, with step 111 measured data according to
The error of the respective result of secondary checking step 104, step 105, step 106, step 107, step 109 and step 110, and do corresponding
Adjustment, until meeting predetermined error criterion；
Step 114：Collect identification of Model Parameters result, and preserve correlation computations and check pilot process.
In embodiments of the present invention, in the step 106, separate excitation operating mode is adopted and unties generator exciter energized circuit
With the connecting line of excitation-transformation variable, 50Hz 380V constant voltage sources are used instead as controllable silicon anode supply, exit actuator lead-lag
Link, it is pure proportional-plus-integral link to put PID, and using unloaded little step method exciter excitation voltage variety before and after step is determined
Per unit value and step amount ratio, phase shift link gain is amplified to power of controlled silicon and is surveyed, it is to avoid lead-lag link is temporary
The impact that state gain is inaccurate and the change of controllable silicon anode voltage is to measured result.
In embodiments of the present invention, in the step 108, exciter idle time constant is carried out to adopt when time domain is recognized
Determine angle step experimental technique with exciter excitation voltage open loop and eliminate voltage close loop control to exciting current of exciter sound
Answer the interference of feature measurement process.
In embodiments of the present invention, in the step 109, during identification exciter idle time constant, typically 70%
Under the low saturation operating mode of specified set end voltage, exciter and generator field saturation are lighter, typically can approximately take saturation coefficient for 0；
Ignore 39 phase brushless exciter commutating reactances, the impact of commutating reactance is integrated into into load current demagnetizing effect and is considered up, order
Determine angle step phantom to greatly simplify.
Compared to prior art, the invention has the advantages that：The invention provides a kind of nuclear power generating sets 39 are mutually whole
Stream brushless excitation system power system electromechanics transient Model and point link parameter actual-measurement modeling method, simulation accuracy and typical excitation
Model parameter is compared and greatly improved, and is prevented effectively from many solution problems during the many-valued parameter identification of high-order control system.Therefore
In present invention can be directly applicable to the power system electromechanics transient analysis related to nuclear power generating sets excitation con-trol, with important
Engineering application value.
Description of the drawings
Fig. 1 is the flow process of the actual-measurement modeling method of the nuclear power generating sets excitation system power system electromechanics transient Model of the present invention
Figure.
Fig. 2 is that the nuclear power generating sets 39 that the present invention is provided mutually are encouraged oneself brushless excitation system structure chart.
Fig. 3 is that the nuclear power generating sets 39 that the present invention is provided mutually are encouraged oneself brushless excitation system illustraton of model.
Fig. 4 is the nuclear power generating sets field regulator PID loop section frequency domain characteristic Theoretical Calculation and measured result that the present invention is provided
Comparison diagram.
Fig. 5 is that the nuclear power generating sets excitation system power that the present invention is provided amplifies phase shift link GAIN TEST oscillogram.
Fig. 6 be the present invention provide ignore saturation effect and the electromotor in the case of exciter commutating reactance band exciter
Unloaded illustraton of model.
Fig. 7 is that the nuclear power brushless exciter idle time constant test that the present invention is provided is determined the step exciter of angle 10% and encouraged
Magnetoelectricity presses contrast effect figure.
Fig. 8 is that the nuclear power brushless exciter idle time constant test that the present invention is provided is determined the step exciter of angle 10% and encouraged
Magnetoelectricity stream contrast effect figure.
Fig. 9 is that nuclear power generating sets self-excitation brushless excitation system closed loop+5% step set end voltage of zero load that the present invention is provided is imitated
True curve and measured waveform contrast effect figure.
Figure 10 is nuclear power generating sets self-excitation brushless excitation system closed loop+5% step exciter excitation of zero load that the present invention is provided
Voltage simulation curve and measured waveform contrast effect figure.
Figure 11 is that nuclear power generating sets self-excitation brushless excitation system closed loop -5% step set end voltage of zero load that the present invention is provided is imitated
True curve and measured waveform contrast effect figure.
Figure 12 is nuclear power generating sets self-excitation brushless excitation system closed loop -5% step exciter excitation of zero load that the present invention is provided
Voltage simulation curve and measured waveform contrast effect figure.
Specific embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
The brushless excitation system machine-electricity transient model actual measurement as shown in figure 1, a kind of nuclear power generating sets 39 of present invention proposition are mutually encouraged oneself
Modeling method, according to the construction featuress of nuclear power generating sets excitation system, abstract simplification goes out nuclear power generating sets excitation system power system machine
Electric transient calculation model, then, carries out corresponding static, dynamic test, tests each Link Model parameter, and by contrasting actual measurement
As a result check whether each partial model parameters precision meets Power System Analysis needs, the tool of the method with the method for simulation result
Body realizes that process is as follows,
1) field regulator of nuclear power generating sets excitation system, three-phase controllable silicon power amplification unit are input into, 39 mutually brushless are encouraged
The physical arrangement and design parameter of magnetomechanical and electromotor, forms excitation system initial model；
2) according to nuclear power excitation system initial model, the identifiability of its model parameter is analyzed, the parameter high to differentiability
Actual measurement identification is carried out, the parameter low to differentiability is fitted identification；
3) in unit resting state, set end voltage measurement links time constant is included to field regulator model parameterT R , amplitude limit link enter line parameter actual measurement, spectral characteristic actual measurement is carried out to PID loop section logical structure and parameter；
4) according to static measured data to field regulator pid parameter, set end voltage measurement links time constantT R , amplitude limit
The parameter of link is recognized；
5) generator excitation voltage reference value, exciter excitation electricity are calculated according to electromotor and exciter no load saturation characteristic
Stream reference value, exciter excitation voltage reference value, electromotor and exciter saturation coefficient, calculate according to exciter load characteristic and encourage
Magnetomechanical armature-reaction demagnetization coefficient；
6) power of controlled silicon is calculated according to Cosine Phase-shift principle and amplifies phase shift link theoretical gainK S , and it is unloaded by separate excitation
Little step is verified；
7) electromotor is boosted near 70% rated voltage under separate excitation idle condition, and by inversion field suppression electromotor is enrolled
Terminal voltage decline curve is to electromotor d-axis open circuit time constantT d0 ' surveyed；
8) electromotor carries out open loop and determine angle step testing under separate excitation 70% specified set end voltage operating mode of zero load, and generation encourages
Magnetomechanical excitation voltage step signal, admission exciter excitation voltage, the change curve of exciting current of exciter；
9) ignore electromotor and exciter saturated characteristic, set up 39 phase brushless exciters and electromotor electromechanical transient simplifies mould
Type, is input into the step form consistent with exciter excitation voltage in angle step is determined, and obtains exciting current of exciter response characteristic,
According to exciting current of exciter change measured curve in angle step is determined, to 39 phase brushless exciter idle time constantsCarry out
Time domain is recognized；
10) the unloaded big step response actual measurement of closed loop under DCgenerator motor field system self-excitation mode is carried out, nuclear power excitation system is calculated
Export-restriction value；
11) the unloaded little step response actual measurement of closed loop is carried out under the self-excitation mode of DCgenerator motor field system, test data is used as sentencing
The whether qualified foundation of disconnected modeling accuracy；
12) 4 are combined）、5）、6）、7）、9）With 10）Result, form complete nuclear power generating sets excitation system model parameter；
13) nuclear power generating sets excitation system simulation example is set up, to 11）Measured data carry out simulation calculation, result of calculation
Meet predetermined error criterion as qualified, if being unsatisfactory for, return to step 4）, with step 10）Measured data is examined in 4）、
5）、6）、7）、9）With 10）The error of respective result, and mutually appropriate adjustment is done, until meeting predetermined error criterion；
14) collect excitation system identification of Model Parameters result, and preserve correlation computations and check pilot process.
Embodiment 1：Below to this by taking the typical nuclear power generating sets poly phase rectification self-excitation brushless excitation system shown in Fig. 2 as an example
Bright further detailed description, but the invention is not restricted to given example.
The method provided using the present invention is carried out actual measurement and is built to nuclear power generating sets excitation system power system electromechanics transient Model
Mould, step is as follows：
Step one：According to field regulator and electromotor data, check whether its equipment can adopt the model table of Fig. 3
Show, if difference, then accordingly changed；
Step 2：Model parameter actual measurement is carried out to field regulator under static state, can using typical time domain identification method or
Person's frequency domain identification method.Actuator pid parameter in the case where operation is arranged overall frequency domain characteristic Theoretical Calculation with measured result to such as scheming
4；
Step 3：Generator excitation voltage reference value, exciter are calculated according to electromotor and exciter no load saturation characteristic
Exciting current reference value, exciter excitation voltage reference value, electromotor and exciter saturation coefficientS E, it is special according to exciter load
Property calculate armature of exciter reaction demagnetization coefficientK D；
Step 4：Lead-lag link is exited, regulator parameter grv1=6.9, trv1=trv3=1s, trv2=5s is put, is entered
The unloaded little step test of row separate excitation, such as Fig. 5.Determine the per unit value of exciter excitation voltage variety and step amount ratio before and after step
Value is excitation system open loop overall gain, removes proportional gainAs power amplification phase shift link gain；
Step 5：Electromotor is boosted near 70% rated voltage under separate excitation idle condition, is enrolled by inversion field suppression
Generator voltage decline curve, takes time interval when set end voltage drops to 0.368 times of initial value and opens for electromotor d-axis
Road time constantT d0 ’；
Step 6：Electromotor carries out open loop and determines the test of angle step under separate excitation 70% specified set end voltage of zero load, and generation is encouraged
Magnetomechanical excitation voltage step signal, admission exciter excitation voltage, the change curve of exciting current of exciter.Ignore electromotor and
Exciter saturated characteristic, sets up electromotor band 39 phase brushless exciters zero load simplified model such as Fig. 6, is input into and determines in angle step
The consistent step form such as Fig. 7 of exciter excitation voltage, is obtained using time domain identification techniqueT E Exciter excitation during=0.428s
Current simulations characteristic is closest with measured curve, such as Fig. 8.0.428 s is exciter idle time constantT E Identifier.
Step 7：Nuclear power generating sets 39 are obtained according to identification result combination mutually to encourage oneself brushless excitation system overall model parameter,
The emulation and actual measurement contrast of closed test are carried out, unit set end voltage and the emulation of exciter excitation voltage are with actual measurement comparing result such as
Shown in Fig. 9-Figure 12.It can be seen that both characteristics are basically identical, the correct of nuclear power generating sets excitation system identification of Model Parameters result is illustrated
Property.
Finally it should be noted that：Mutually encouraged oneself brushless excitation system electromechanical transient modeling embodiments with above-mentioned Alstom 39
Only to illustrate technical scheme rather than a limitation in 39 phase brushless excitation units.Although with reference to above-described embodiment pair
The present invention has been described in detail, and those of ordinary skill in the art should be understood：Still can be to the concrete of the present invention
Embodiment is modified or equivalent, and any modification or equivalent without departing from spirit and scope of the invention,
It all should cover in the middle of scope of the presently claimed invention.
It is more than presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, produced function is made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (4)
1. a kind of nuclear power generating sets 39 are mutually encouraged oneself brushless excitation system machine-electricity transient model actual-measurement modeling method, it is characterised in that：Root
Mutually encourage oneself according to nuclear power generating sets 39 construction featuress of brushless excitation system, it is steady that abstract simplification goes out nuclear power generating sets excitation system electromechanical transient
Determine computation model, then carry out corresponding static, dynamic test, test its each point of Link Model parameter, and by contrasting actual measurement
As a result check whether each Link Model parameters precision meets Power System Analysis needs with the method for simulation result, specifically include as
Lower step,
Step 101：It is field regulator in input nuclear power generating sets excitation system, three-phase controllable silicon power amplification unit, 39 mutually brushless
The physical arrangement and design parameter of exciter and electromotor, forms excitation system initial model；
Step 102：According to excitation system initial model, the identifiability of its model parameter is analyzed, the parameter high to differentiability is entered
Row actual measurement identification, the parameter low to differentiability is fitted identification；
Step 103：In unit resting state, set end voltage measurement links time constant is included to field regulator model parameterT R , amplitude limit link enter line parameter actual measurement, spectral characteristic test is carried out to PID loop section logical structure and parameter；
Step 104：According to static measured data to field regulator pid parameter, set end voltage measurement links time constantT R , limit
The parameter of width link is recognized；
Step 105：Generator excitation voltage reference value, exciter excitation are calculated according to electromotor and exciter no load saturation characteristic
Current reference value, exciter excitation voltage reference value, electromotor and exciter saturation coefficient, calculate according to exciter load characteristic
Armature of exciter reacts demagnetization coefficient；
Step 106：Power of controlled silicon is calculated according to Cosine Phase-shift principle and amplifies phase shift link theoretical gain, and it is unloaded by separate excitation
Little step is verified；
Step 107：Electromotor is boosted near 70% rated voltage under separate excitation idle condition, is generated electricity by inversion field suppression admission
Set end voltage decline curve is surveyed to electromotor d-axis open circuit time constant；
Step 108：Electromotor carries out open loop and determines the test of angle step under the unloaded low saturation operating mode of separate excitation, produces exciter excitation
Voltage step signal, admission exciter excitation voltage, the change curve of exciting current of exciter；
Step 109：Ignore electromotor and exciter saturated characteristic, set up 39 phase brushless exciters and electromotor electromechanical transient simplifies
Model, is input into the step form consistent with exciter excitation voltage in angle step is determined, and obtains exciting current of exciter response special
Property, according to exciting current of exciter change measured curve in angle step is determined, 39 phase brushless exciter idle time constants are entered
Row time domain is recognized；
Step 110：The unloaded big step response actual measurement of closed loop under DCgenerator motor field system self-excitation mode is carried out, nuclear power excitation system is calculated
Export-restriction value；
Step 111：Carry out under the self-excitation mode of DCgenerator motor field system the unloaded little step response actual measurement of closed loop, test data is used as sentencing
The whether qualified foundation of disconnected modeling accuracy；
Step 112：The result of combination step 104, step 105, step 106, step 107, step 109 and step 110, has formed
Whole nuclear power generating sets excitation system model parameter；
Step 113：Nuclear power generating sets excitation system simulation example is set up, simulation calculation is carried out to the measured data of step 111, calculated
As a result predetermined error criterion is met as qualified, if being unsatisfactory for, return to step 104 is examined successively with step 111 measured data
The error of the respective result of step 104, step 105, step 106, step 107, step 109 and step 110 is looked into, and does corresponding tune
It is whole, until meeting predetermined error criterion；
Step 114：Collect identification of Model Parameters result, and preserve correlation computations and check pilot process.
2. nuclear power generating sets according to claim 1 39 mutually encourage oneself brushless excitation system machine-electricity transient model actual measurement modeling side
Method, it is characterised in that：In the step 106, separate excitation operating mode is adopted unties generator exciter energized circuit with excitation-transformation variable
Connecting line, uses 50Hz 380V constant voltage sources instead as controllable silicon anode supply, exits actuator lead-lag link, puts PID
For pure proportional-plus-integral link, using unloaded little step method determine before and after step the per unit value of exciter excitation voltage variety with
Step amount ratio, amplifies phase shift link gain and surveys, it is to avoid the gain of lead-lag link transient state is forbidden to power of controlled silicon
Impact of the true and controllable silicon anode voltage change to measured result.
3. nuclear power generating sets according to claim 1 39 mutually encourage oneself brushless excitation system machine-electricity transient model actual measurement modeling side
Method, it is characterised in that：In the step 108, exciter idle time constant is carried out to employ exciter when time domain is recognized
Excitation voltage open loop determines angle step experimental technique and eliminates voltage close loop control to exciting current of exciter response characteristic measurement
The interference of process.
4. nuclear power generating sets according to claim 3 39 mutually encourage oneself brushless excitation system machine-electricity transient model actual measurement modeling side
Method, it is characterised in that：It is low full in 70% specified set end voltage during identification exciter idle time constant in the step 109
Under operating mode, exciter and generator field saturation are lighter, approximately take saturation coefficient for 0；Ignore 39 phase brushless exciter commutations
Reactance, is integrated into the impact of commutating reactance load current demagnetizing effect and considers up, and the simplification of angle step phantom is determined in order.
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| CN106709172A (en) * | 2016-12-15 | 2017-05-24 | 海南电力技术研究院 | Grid-connected excitation system experiment data processing method and apparatus |
| CN106680714A (en) * | 2017-01-09 | 2017-05-17 | 南方电网科学研究院有限责任公司 | Method and device for computing gain of power units during normal operation of excitation systems |
| CN106684866A (en) * | 2017-01-09 | 2017-05-17 | 南方电网科学研究院有限责任公司 | Calculation method and apparatus for static state open loop comprehensive gain |
| CN112952784B (en) * | 2021-02-24 | 2024-05-10 | 国网浙江省电力有限公司电力科学研究院 | Excitation variable overload limiter applicable to flexible excitation system |
| CN115166512B (en) * | 2022-06-10 | 2023-06-16 | 内蒙古大唐国际托克托发电有限责任公司 | Synchronous motor parameter revision identification method |
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Effective date of registration: 20171130 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: State Grid Fujian Electric Power Co., Ltd. Patentee after: State Grid Corporation of China Co-patentee after: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. Co-patentee after: Economic technology academy of State Grid Fujian Electric Power Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: State Grid Fujian Electric Power Co., Ltd. Patentee before: State Grid Corporation of China Co-patentee before: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. |