CN103105844A - Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller - Google Patents
Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller Download PDFInfo
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- CN103105844A CN103105844A CN2011103592055A CN201110359205A CN103105844A CN 103105844 A CN103105844 A CN 103105844A CN 2011103592055 A CN2011103592055 A CN 2011103592055A CN 201110359205 A CN201110359205 A CN 201110359205A CN 103105844 A CN103105844 A CN 103105844A
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Abstract
The invention discloses a detection method and a detection system of a generator sub-synchronous resonance generator terminal damping controller. The detection method includes that electrical power system simulation environment, a 12-chain cascade H-bridge voltage source converter model and a boosting transformer of the 12-chain cascade H-bridge voltage source converter model are established, the electrical power system simulation environment provides electric signals for a control cabinet of the generator sub-synchronous resonance generator terminal damping controller, the control cabinet of the generator sub-synchronous resonance generator terminal damping controller generates window signals according to the electric signals, the window signals controls an insulated gate bipolar translator (IGBT) of each bridge of the 12-chain cascade H-bridge voltage source converter model to be powered on or powered off, a restraining sub-synchronous resonance damping current is generated and injected into a generator terminal of a generator model through the boosting transformer model, disturbance is arranged so as to stimulate the electrical power system simulation environment to generate sub-synchronous resonance of self natural mode of vibration, and the restraining effect of the sub-synchronous resonance of the restraining sub-synchronous resonance damping current to the self natural mode of vibration of the electrical power system simulation environment is detected.
Description
Technical field
The present invention relates to field of power, relate in particular to the inhibition problem of the subsynchronous resonance in electric system, is a kind of detection method and system of generator subsynchronous resonance machine end damping controller concretely.
Background technology
The Sub-synchronous Resonance of generator affects normally sending of electric power, and at the Generator end, generator subsynchronous resonance machine end damping controller being installed is a kind of method that solves subsynchronous problem.The close-loop dynamic performance of generator subsynchronous resonance machine end damping controller (GTSDC) detects test and can realize under traditional physics dynamic similation environment, that is: use true but scaled electrical equipment to build the simulation electric system, observe the dynamic property under generator subsynchronous resonance machine end damping controller closed loop.But this detection method efficient is lower, and the test period is long, and cost is expensive.
Summary of the invention
The objective of the invention is the deficiency that detection method efficient is low, the test period is long and cost is expensive that exists in prior art in order to overcome, provide a kind of detection method and system of generator subsynchronous resonance machine end damping controller, to solve the problem that exists at present.
In order to achieve the above object, the embodiment of the invention discloses a kind of detection method of generator subsynchronous resonance machine end damping controller, comprising: set up the electric system simulation environment and 12 chain H bridge cascade voltage source type current transformer model and the step-up transformer models thereof that comprise generator model, excitation system and governing system; Described electric system simulation environment provides to the switch board of described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal and current transformer model output current signal; The switch board of described generator subsynchronous resonance machine end damping controller generates start pulse signal according to described electric signal; Described start pulse signal is controlled IGBT conducting or the shutoff of each bridge in described 12 chain H bridge cascade voltage source type current transformer models, generates and suppresses the subsynchronous resonance damping current, and inject the machine end of described generator model through described step-up transformer model; Disturbance is set, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration, detect described inhibition subsynchronous resonance damping current to the inhibition of the subsynchronous resonance of described electric system simulation environment self natural mode of vibration.
In another embodiment, the detection method of generator subsynchronous resonance machine end damping controller of the present invention also comprises: set up the generator subsynchronous resonance machine end damping controller realistic model that comprises control module, damping current generation module and step-up transformer model thereof; Described control module receives the set end voltage signal of generator model in described electric system simulation environment and the tach signal of generator, generates to suppress the required damping current control signal of subsynchronous resonance that described electric system simulation environment is excited to produce; Described damping current generation module receives the damping current control signal that described control module generates, and generates corresponding damping current, is injected into the machine end of generator model in described electric system simulation environment; Disturbance is set, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration; Detect described generator subsynchronous resonance machine end damping controller realistic model with described generator subsynchronous resonance machine end damping controller under identical electric system simulation environment subsynchronous resonance operating mode, suppress the consistance of the effect of subsynchronous resonance; If inconsistent, revise the inner correction link parameter of control module of described generator subsynchronous resonance machine end damping controller realistic model, make it under identical electric system simulation environment subsynchronous resonance operating mode, the effect that suppresses subsynchronous resonance is consistent with the effect that described generator subsynchronous resonance machine end damping controller suppresses subsynchronous resonance.
In another embodiment, the detection method of generator subsynchronous resonance machine end damping controller of the present invention also comprises: described generator subsynchronous resonance machine end damping controller is put into operation; In described electric system simulation environment, disturbance is set; Detect the impact whether excitation system in described electric system simulation environment worked by described generator subsynchronous resonance machine end damping controller.
In another embodiment, the detection method of generator subsynchronous resonance machine end damping controller of the present invention also comprises: the parameter of described generator model is set, makes the skew of the positive and negative both direction of subsynchronous resonance frequency generation of described electric system simulation environment natural mode of vibration; Detect described generator subsynchronous resonance machine end damping controller and whether can suppress the subsynchronous resonance that described electric system simulation environment is excited to produce under the operating mode of this parameter shift.
in order to address the above problem, the present invention also provides a kind of detection system of generator subsynchronous resonance machine end damping controller, comprise generator subsynchronous resonance machine end damping controller and simulated environment and model building module, wherein said simulated environment and model building module comprise: simulated environment is set up module, be used for setting up and comprise generator model, excitation system and governing system are at interior electric system simulation environment, it provides to described generator subsynchronous resonance machine end damping controller and comprises generator terminal voltage, the generator speed signal is in interior electric signal, 12 chain H bridge cascade voltage source type converter module and step-up transformer modules thereof suppress the subsynchronous resonance damping current for generation of generating, and described inhibition subsynchronous resonance damping current injects the machine end of described generator model through described step-up transformer model.
In another embodiment, detection system of the present invention also comprises: control module, be used for receiving the set end voltage signal of described electric system simulation environment generator model and the tach signal of generator, generate and suppress the required damping current control signal of subsynchronous resonance that described electric system simulation environment is excited to produce; Desirable controllable current source module and step-up transformer module thereof, be used for receiving the damping current control signal that described control module generates, generate corresponding damping current, be injected into the machine end of generator model in described electric system simulation environment, suppress the subsynchronous resonance that described electric system simulation environment is excited to produce.
Detection method and the system of the generator subsynchronous resonance machine end damping controller of the embodiment of the present invention, the beneficial effect that can produce is: dynamic property that can complete detection GTSDC with and on the impact of conventional excitation system, for the safe and stable operation of generating plant and electrical network provides necessary Data support.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the generator subsynchronous resonance machine end damping controller detection system of the embodiment of the present invention;
Fig. 2 is the simulated environment of generator subsynchronous resonance machine end damping controller detection system of the embodiment of the present invention and the structural representation of model building module;
Fig. 3 is generator subsynchronous resonance machine end damping controller detection system of the present invention, in actual testing process, and the schematic diagram of a kind of embodiment of the trend of total electric signal;
Fig. 4 is the structural representation of the generator subsynchronous resonance machine end damping controller realistic model 13 of foundation;
Fig. 5 is the transport function schematic diagram of control module 131 of the generator subsynchronous resonance machine end damping controller detection system of the embodiment of the present invention;
Fig. 6 is the transport function schematic diagram of switch board of the generator subsynchronous resonance machine end damping controller of the embodiment of the present invention;
Fig. 7 is the specific embodiment according to the detection system of electric system simulation environment, 12 chain H bridge cascade voltage source type current transformers and step-up transformer model, controllable current source and step-up transformer model buildings thereof;
Fig. 8 is for detecting Generator end subsynchronous resonance damping controller to the method flow diagram of the inhibition of subsynchronous resonance;
Be the testing process according to Fig. 8 in Fig. 9, the inhibition comparison diagram that obtains;
Figure 10 is the dynamic perfromance that detects Generator end subsynchronous resonance damping controller realistic model and actual generator machine end subsynchronous resonance damping controller consistent method flow diagram whether;
Figure 11 is the testing process according to Figure 10, and whether the dynamic perfromance that obtains consistent comparison diagram;
Figure 12 is for detecting the method flow diagram that Generator end subsynchronous resonance damping controller and conventional excitation system control function whether can cooperation;
Figure 13 is the testing process according to Figure 12, and the Generator end subsynchronous resonance damping controller that obtains and conventional excitation system are controlled the comparison diagram that function whether can cooperation;
Whether Figure 14 can adapt to the method flow diagram of the skew of power system environment natural mode of vibration subsynchronous resonance frequency for detecting Generator end subsynchronous resonance damping controller;
Figure 15 is the testing process according to Figure 14, and whether the Generator end subsynchronous resonance damping controller that obtains can adapt to the comparison diagram of the skew of power system environment natural mode of vibration subsynchronous resonance frequency.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the structural representation of the generator subsynchronous resonance machine end damping controller detection system of the embodiment of the present invention.As shown in the figure, the detection system of generator subsynchronous resonance machine end damping controller of the present invention comprises simulated environment and model building module 1 and generator subsynchronous resonance machine end damping controller (GTSDC) 2, wherein said simulated environment and model building module 1 are used for setting up the electric system simulation environment that comprises generator model, excitation system and governing system, and it provides to described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal; It also is used for setting up the power section model of generator subsynchronous resonance machine end damping controller, suppresses the subsynchronous resonance damping current for generation of generating, and injects the machine end of described generator model.
In reality detects, because generator subsynchronous resonance machine end damping controller is bulky, be difficult for mobile, therefore, detect its performance, only the switch board of generator subsynchronous resonance machine end damping controller partly need to be put in detection system, and set up the model of power section, model parameter is set, also can detects the overall performance of whole generator subsynchronous resonance machine end damping controller.
In the present embodiment, because the electric parameters power such as voltage and current that provide in simulated environment and model building module 1 are less, therefore after required power amplifier 2 is done the power amplification of voltage and current signal, be injected into the switch board part of generator subsynchronous resonance machine end damping controller, with voltage and current signal that is virtually reality like reality.
In the present embodiment, described detection system also comprises wave recording device, is used for showing the testing result of described generator subsynchronous resonance machine end damping controller.
Fig. 2 is the simulated environment of generator subsynchronous resonance machine end damping controller detection system of the embodiment of the present invention and the structural representation of model building module.As shown in the figure, simulated environment and model building module 1 comprise that simulated environment sets up module 11, be used for setting up the electric system simulation environment that comprises generator model, excitation system and governing system, it provides to described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal;
12 chain H bridge cascade voltage source type converter module and step-up transformer modules 12 thereof, it comprises 12 chain H bridge cascade voltage source type converter module and step-up transformer modules, suppress the subsynchronous resonance damping current for generation of generating, described inhibition subsynchronous resonance damping current injects the machine end of described generator model through described step-up transformer module.
In the present embodiment, simulated environment is set up module 11 and 12 chain H bridge cascade voltage source type converter modules and step-up transformer module 12 thereof and can be set up in real-time large-scale Digital Simulation System RTDS, also can set up in other real-time large-scale Digital Simulation System of this area.
Fig. 3 is generator subsynchronous resonance machine end damping controller detection system of the present invention, in actual testing process, and the schematic diagram of a kind of embodiment of the trend of total electric signal.As shown in the figure, the simulated environment in simulated environment and model building module is set up module and is provided to the switch board of described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal and current transformer model output current signal by power amplifier;
The switch board of described generator subsynchronous resonance machine end damping controller generates the IGBT start pulse signal according to described electric signal;
Described start pulse signal is controlled IGBT conducting or the shutoff of each bridge in 12 chain H bridge cascade voltage source type current transformer models in described simulated environment and model building module, generate and suppress the subsynchronous resonance damping current, and inject the machine end of described generator model through described step-up transformer model;
Disturbance is set, excite described simulated environment to set up the subsynchronous resonance that simulated environment that module sets up produces self natural mode of vibration, detects described inhibition subsynchronous resonance damping current is set up simulated environment self natural mode of vibration of module foundation to described simulated environment the inhibition of subsynchronous resonance.
In another embodiment of the invention, also set up the generator subsynchronous resonance machine end damping controller realistic model that comprises control module, damping current generation module and step-up transformer model thereof in simulated environment and model building module, in order to detect to drop into the GTSDC device and with after the GTSDC realistic model to the difference of subsynchronous resonance inhibition, and make it consistent with the characteristic of actual GTSDC device in order to revise the GTSDC realistic model.
As shown in Figure 4, be the structural representation of the generator subsynchronous resonance machine end damping controller realistic model 13 set up.Wherein, described control module 131 receives the set end voltage signal of generator model in described electric system simulation environment and the tach signal of generator, generates and suppresses the required damping current control signal of subsynchronous resonance that described electric system simulation environment is excited to produce; Described damping current generation module 132 receives the damping current control signal that described control modules 131 generate, and generates corresponding damping current, is injected into the machine end of generator model in described electric system simulation environment through described step-up transformer module 133; Disturbance is set, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration; Detect described generator subsynchronous resonance machine end damping controller realistic model 13 with described generator subsynchronous resonance machine end damping controller under identical electric system simulation environment subsynchronous resonance operating mode, suppress the consistance of the effect of subsynchronous resonance; If inconsistent, revise the inner correction link parameter of control module 131 of described generator subsynchronous resonance machine end damping controller realistic model, make it under identical electric system simulation environment subsynchronous resonance operating mode, the effect that suppresses subsynchronous resonance is consistent with the effect that described generator subsynchronous resonance machine end damping controller suppresses subsynchronous resonance.
In the present embodiment, the definite value set of described control module 131 is consistent with the definite value set of the switch board of described generator subsynchronous resonance machine end damping controller.The step-up transformer model parameter of described damping current generation module is consistent with the step-up transformer model parameter of described 12 chain H bridge cascade voltage source type current transformer models.
In the present embodiment, the damping current generation module 132 of described generator subsynchronous resonance machine end damping controller realistic model is desirable controllable current source model.
Fig. 5 is the transport function schematic diagram of control module 131 of the generator subsynchronous resonance machine end damping controller detection system of the embodiment of the present invention.Fig. 6 is the transport function schematic diagram of switch board of the generator subsynchronous resonance machine end damping controller of the embodiment of the present invention.Both differences are: input signal is different: in Fig. 5, input signal is generator model speed discrepancy signal in RTDS, be the RTDS built-in variable, and in Fig. 6, input signal is that in RTDS, the generator speed signal passes to the switch board sampling card after being converted into voltage signal, sends into computing unit after transforming through A/D; Computation period is different: Fig. 5 passes letter in the RTDS internal calculation, and execution cycle is tens microseconds, passes letter in Fig. 6 and calculates in switch board, and computation period is several milliseconds.Two pass the final signal that generates of letter is all the instruction current signal, when passing letter with Fig. 5 and come simulation drawing 6 controller function, in the situation that modal filter parameter, gain, phase shift link parameter arrange identical, for making up the instruction current difference because of article one and the generation of second reason, empirical tests passes letter in Fig. 5 increase phase place correction link, and adjust rational parameter by test, can make two DC current consistent.
Embodiment:
Detect at certain generator machine end subsynchronous resonance damping controller and use above-mentioned detection method of the present invention in test.Transport function such as Fig. 6 of actual generator machine end subsynchronous resonance damping controller switch board, control module transport function such as Fig. 5 of the Generator end subsynchronous resonance damping controller realistic model of setting up in RTDS, electric system simulation environment, 12 chain H bridge cascade voltage source type current transformers and step-up transformer model thereof, controllable current source and step-up transformer model thereof adopt the model of Fig. 7 to build.Model shown in Figure 7 is the electric energy transmitting system of a simplification, generator produces electric energy, the transformer boosted voltage, long Distance Transmission line arrives equivalent Infinite bus system with power delivery, the Infinite bus system pin is received electric energy, series compensation reactor shortens the transmission line equivalent reactance and improves the transmission line transport capacity, and the while is with power transmission system easy excitated this synchronous resonant phenomenon when receiving disturbance of high series compensatnig degree.
Embodiment one:
If the inhibition of wish checking Generator end subsynchronous resonance damping controller to subsynchronous resonance adopts method flow as shown in Figure 8.That is:
Step S801 sets up electric system simulation environment and 12 chain H bridge cascade voltage source type current transformer model and the step-up transformer models thereof that comprise generator model, excitation system and governing system as stated above on the real-timedigital simulation system software platform;
Step S802, described electric system simulation environment provides to the switch board of described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal and current transformer model output current signal.In this step, by analog quantitys such as Generator end subsynchronous resonance damping controller requirement access generator terminal voltage, output current of converter, generator speed signals;
Step S803, the switch board of described generator subsynchronous resonance machine end damping controller generates start pulse signal according to described electric signal;
Step S804, described start pulse signal is controlled IGBT conducting or the shutoff of each bridge in described 12 chain H bridge cascade voltage source type current transformer models, generate and suppress the subsynchronous resonance damping current, and inject the machine end of described generator model through described step-up transformer model;
Step S805 arranges disturbance, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration, detects described inhibition subsynchronous resonance damping current to the inhibition of the subsynchronous resonance of described electric system simulation environment self natural mode of vibration.in this step, the corresponding model of operation emulator, operate generator machine end subsynchronous resonance damping controller is set up closed-loop control, various perturbation excitation subsynchronous resonances are set in electric system, generator speed is recorded ripple, when more not dropping into Generator end subsynchronous resonance damping controller the oscillation and divergence of generator speed and drop into Generator end subsynchronous resonance damping controller after the oscillatory extinction process of generator speed can verify the inhibition of the subsynchronous resonance that Generator end subsynchronous resonance damping controller device is excited to produce to the electric system simulation environment, and can judge whether to meet the demands according to the relevant industries standard.The schematic diagram of Fig. 9 for ease of understanding, after the black waveform is electric system generation subsynchronous resonance, generator speed signal waveform when not dropping into Generator end subsynchronous resonance damping controller, as seen its one-tenth is dispersed attitude, characterizes hyposynchronous resonance of power system again to serious situation development; The grey waveform is under same operating mode, generator speed signal waveform when dropping into Generator end subsynchronous resonance damping controller, and as seen it becomes the convergence attitude, characterizes hyposynchronous resonance of power system and has obtained effective inhibition.
Embodiment two:
If that is: whether wish checking Generator end subsynchronous resonance damping controller realistic model is consistent with the dynamic perfromance of actual generator machine end subsynchronous resonance damping controller, adopt method flow as shown in figure 10, that is:
Step S1001 sets up the generator subsynchronous resonance machine end damping controller realistic model that comprises control module, damping current generation module and step-up transformer model thereof;
Step S1002, described control module receives the set end voltage signal of generator model in described electric system simulation environment and the tach signal of generator, generates to suppress the required damping current control signal of subsynchronous resonance that described electric system simulation environment is excited to produce;
Step S1003, described damping current generation module receives the damping current control signal that described control module generates, and generates corresponding damping current, is injected into the machine end of generator model in described electric system simulation environment;
Step S1004 arranges disturbance, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration;
Step S1005, detect described generator subsynchronous resonance machine end damping controller realistic model with described generator subsynchronous resonance machine end damping controller under identical electric system simulation environment subsynchronous resonance operating mode, suppress the consistance of the effect of subsynchronous resonance;
Step S1006, if inconsistent, revise the inner correction link parameter of control module of described generator subsynchronous resonance machine end damping controller realistic model, make it under identical electric system simulation environment subsynchronous resonance operating mode, the effect that suppresses subsynchronous resonance is consistent with the effect that described generator subsynchronous resonance machine end damping controller suppresses subsynchronous resonance.
In the present embodiment, take as stated above the electric system simulation environmental model on the real-timedigital simulation system software platform, and by analog quantitys such as Generator end subsynchronous resonance damping controller requirement access generator terminal voltage, output current of converter, generator speed signals, and Generator end subsynchronous resonance damping controller switch board output trigger pulse is sent into the real-timedigital simulation system.The corresponding model of operation emulator, operate generator machine end subsynchronous resonance damping controller is set up closed-loop control, various perturbation excitation subsynchronous resonances are set in electric system, generator speed is recorded ripple, when relatively dropping into Generator end subsynchronous resonance damping controller, the waveform of generator speed after the waveform of generator speed and input Generator end subsynchronous resonance damping controller realistic model, can verify whether Generator end subsynchronous resonance damping controller and realistic model dynamic perfromance thereof be consistent.the schematic diagram of Figure 11 for ease of understanding, after the black waveform is electric system generation subsynchronous resonance, generator speed signal waveform when dropping into Generator end subsynchronous resonance damping controller, the grey waveform is under same operating mode, generator speed signal waveform when dropping into Generator end subsynchronous resonance damping controller realistic model is (in this figure because black waveform major part is coated under the grey waveform, the black graphics part of therefore visible grey pattern edge), as seen two basic overlaids of waveform, the Generator end subsynchronous resonance damping controller realistic model that characterizes after calibrated is consistent with the dynamic perfromance of actual generator machine end subsynchronous resonance damping controller.
Embodiment three:
Whether can cooperation if wish checking Generator end subsynchronous resonance damping controller and conventional excitation system are controlled function, employing method flow as shown in figure 12, that is:
Step S1201 puts described generator subsynchronous resonance machine end damping controller into operation;
Step S1202 arranges 5% step disturbance of generator rated voltage in described electric system simulation environment;
Step S1203, whether the excitation system that detects in described electric system simulation environment is subjected to the impact of described generator subsynchronous resonance machine end damping controller normal operation on the control function of generator terminal voltage.
In the present embodiment, take as stated above the electric system simulation environmental model on the real-timedigital simulation system software platform, and by analog quantitys such as Generator end subsynchronous resonance damping controller requirement access generator terminal voltage, output current of converter, generator speed signals, and Generator end subsynchronous resonance damping controller switch board output trigger pulse is sent into the real-timedigital simulation system.The corresponding model of operation emulator, operate generator machine end subsynchronous resonance damping controller is set up closed-loop control, stator rated voltage+5% step disturbance is set in electric system, generator unit stator voltage is recorded ripple, relatively drop into before and after Generator end subsynchronous resonance damping controller, the waveform of generator unit stator voltage can verify whether Generator end subsynchronous resonance damping controller has adverse influence to conventional excitation system control function.The schematic diagram of Figure 13 for ease of understanding, the black waveform is for after dropping into Generator end subsynchronous resonance damping controller, after generator unit stator rated voltage+5% step disturbance is set, the generator unit stator voltage waveform, the grey waveform is under same operating mode, generator unit stator voltage waveform when not dropping into Generator end subsynchronous resonance damping controller, as seen two basic overlaids of waveform, characterizing Generator end subsynchronous resonance damping controller can cooperation with conventional excitation system control function.
Embodiment four:
If whether wish checking Generator end subsynchronous resonance damping controller can adapt to the skew of power system environment natural mode of vibration subsynchronous resonance frequency, adopt method flow as shown in figure 14, that is:
Step S1401 arranges the parameter of described generator model, makes the subsynchronous resonance frequency of described electric system simulation environment natural mode of vibration that the skew of positive and negative both direction occur;
Step S1402 detects described generator subsynchronous resonance machine end damping controller and whether can suppress the subsynchronous resonance that described electric system simulation environment is excited to produce under the operating mode of this parameter shift.
In the present embodiment, take as stated above the electric system simulation environmental model on the real-timedigital simulation system software platform, and by analog quantitys such as Generator end subsynchronous resonance damping controller requirement access generator terminal voltage, output current of converter, generator speed signals, and Generator end subsynchronous resonance damping controller switch board output trigger pulse is sent into the real-timedigital simulation system.the corresponding model of operation emulator, operate generator machine end subsynchronous resonance damping controller is set up closed-loop control, suitably in the modification generator model, a certain parameter is offset electric system simulation environment natural mode of vibration subsynchronous resonance frequency, the perturbation excitation subsynchronous resonance is set in electric system, the generator speed signal is recorded ripple, relatively drop into before and after Generator end subsynchronous resonance damping controller, whether the waveform of generator speed signal restrains, can verify whether Generator end subsynchronous resonance damping controller has adaptability to the skew of electric system natural mode of vibration subsynchronous resonance frequency.the schematic diagram of Figure 15 for ease of understanding, the skew of a certain natural mode of vibration subsynchronous resonance of electric system simulation environment frequency generation+0.2Hz, the activating system subsynchronous resonance, the black waveform is not for dropping into Generator end subsynchronous resonance damping controller, the generator speed signal waveform, the grey waveform is under same operating mode, generator speed signal waveform after input Generator end subsynchronous resonance damping controller, as seen after dropping into Generator end subsynchronous resonance damping controller, the generator speed signal becomes the convergence attitude, characterize the skew that Generator end subsynchronous resonance damping controller can adapt to power system environment natural mode of vibration subsynchronous resonance frequency.
Use the detection system of the Generator end subsynchronous resonance damping controller of the embodiment of the present invention, can use real-time large-scale Digital Simulation System to build GTSDC closed test electric power system model, test and assessment GTSDC dynamic property, dynamic property that can complete detection GTSDC with and on the impact of conventional excitation system, for the safe and stable operation of generating plant and electrical network provides necessary Data support.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above is only specific embodiments of the invention; the protection domain that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (17)
1. the detection method of a generator subsynchronous resonance machine end damping controller, is characterized in that, described detection method comprises:
Foundation comprises electric system simulation environment and 12 chain H bridge cascade voltage source type current transformer model and the step-up transformer models thereof of generator model, excitation system and governing system;
Described electric system simulation environment provides to the switch board of described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal and current transformer model output current signal;
The switch board of described generator subsynchronous resonance machine end damping controller generates start pulse signal according to described electric signal;
Described start pulse signal is controlled IGBT conducting or the shutoff of each bridge in described 12 chain H bridge cascade voltage source type current transformer models, generates and suppresses the subsynchronous resonance damping current, and inject the machine end of described generator model through described step-up transformer model;
Disturbance is set, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration, detect described inhibition subsynchronous resonance damping current to the inhibition of the subsynchronous resonance of described electric system simulation environment self natural mode of vibration.
2. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 1, is characterized in that, described detection method also comprises:
Foundation comprises the generator subsynchronous resonance machine end damping controller realistic model of control module, damping current generation module and step-up transformer model thereof;
Described control module receives the set end voltage signal of generator model in described electric system simulation environment and the tach signal of generator, generates to suppress the required damping current control signal of subsynchronous resonance that described electric system simulation environment is excited to produce;
Described damping current generation module receives the damping current control signal that described control module generates, and generates corresponding damping current, is injected into the machine end of generator model in described electric system simulation environment;
Disturbance is set, excites the subsynchronous resonance of described electric system simulation environment generation self natural mode of vibration;
Detect described generator subsynchronous resonance machine end damping controller realistic model with described generator subsynchronous resonance machine end damping controller under identical electric system simulation environment subsynchronous resonance operating mode, suppress the consistance of the effect of subsynchronous resonance;
If inconsistent, revise the inner correction link parameter of control module of described generator subsynchronous resonance machine end damping controller realistic model, make it under identical electric system simulation environment subsynchronous resonance operating mode, the effect that suppresses subsynchronous resonance is consistent with the effect that described generator subsynchronous resonance machine end damping controller suppresses subsynchronous resonance.
3. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 2, is characterized in that, the definite value set of described control module is consistent with the definite value set of the switch board of described generator subsynchronous resonance machine end damping controller.
4. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 2, it is characterized in that, the step-up transformer model parameter of described damping current generation module is consistent with the step-up transformer model parameter of described 12 chain H bridge cascade voltage source type current transformer models.
5. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 2, is characterized in that, the damping current generation module of described generator subsynchronous resonance machine end damping controller realistic model is desirable controllable current source model.
6. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 1, is characterized in that, described detection method also comprises:
Described generator subsynchronous resonance machine end damping controller is put into operation;
In described electric system simulation environment, disturbance is set;
Detect the impact whether excitation system in described electric system simulation environment worked by described generator subsynchronous resonance machine end damping controller.
7. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 6, it is characterized in that, described disturbance is 5% step disturbance of generator rated voltage, and whether the excitation system that detects in described electric system simulation environment is subjected to the impact of described generator subsynchronous resonance machine end damping controller normal operation on the control function of generator terminal voltage.
8. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 6, it is characterized in that, described disturbance is generator active power vibration disturbance, detects in described electric system simulation environment, whether excitation system is subjected to the impact of described generator subsynchronous resonance machine end damping controller normal operation on the damping function of meritorious vibration.
9. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 6, it is characterized in that, described disturbance is got rid of specified idlely for generator is set in described electric system simulation environment, detects the impact whether excitation system in described electric system simulation environment worked by described generator subsynchronous resonance machine end damping controller on the control function of stator voltage.
10. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 6, it is characterized in that, described disturbance causes the generator overexcitation for no-power vacancy is set in described electric system simulation environment, detect the impact that in described electric system simulation environment, whether excitation system overexcitation limitation function worked by described generator subsynchronous resonance machine end damping controller.
11. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 6, it is characterized in that, described disturbance is advanced phase for the generator degree of depth is set in described electric system simulation environment, detect that excitation system in described electric system simulation environment is low encourages the impact whether limitation function is subjected to described generator subsynchronous resonance machine end damping controller normal operation.
12. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 1 is characterized in that, described detection method also comprises:
The parameter of described generator model is set, makes the skew of the positive and negative both direction of subsynchronous resonance frequency generation of described electric system simulation environment natural mode of vibration;
Detect described generator subsynchronous resonance machine end damping controller and whether can suppress the subsynchronous resonance that described electric system simulation environment is excited to produce under the operating mode of this parameter shift.
13. the detection method of generator subsynchronous resonance machine end damping controller as described in claim 1～12 any one is characterized in that, described electric power system model also comprises:
Generator model, excitation system, governing system, transformer, isolating switch model, long distance transmission line model, series compensation capacitor model and equivalent infinitely great power supply.
14. the detection method of generator subsynchronous resonance machine end damping controller as claimed in claim 13 is characterized in that described electric system simulation environment is set up in real-time large-scale Digital Simulation System RTDS.
15. the detection system of a generator subsynchronous resonance machine end damping controller, it is characterized in that, described detection system comprises generator subsynchronous resonance machine end damping controller and simulated environment and model building module, and wherein said simulated environment and model building module comprise:
Simulated environment is set up module, be used for setting up the electric system simulation environment that comprises generator model, excitation system and governing system, it provides to described generator subsynchronous resonance machine end damping controller the electric signal that comprises generator terminal voltage, generator speed signal;
12 chain H bridge cascade voltage source type converter module and step-up transformer modules thereof suppress the subsynchronous resonance damping current for generation of generating, and described inhibition subsynchronous resonance damping current injects the machine end of described generator model through described step-up transformer model.
16. the detection system of generator subsynchronous resonance machine end damping controller as claimed in claim 15 is characterized in that, described detection system also comprises:
Control module is used for receiving the set end voltage signal of described electric system simulation environment generator model and the tach signal of generator, generates to suppress the required damping current control signal of subsynchronous resonance that described electric system simulation environment is excited to produce;
Desirable controllable current source module and step-up transformer module thereof, be used for receiving the damping current control signal that described control module generates, generate corresponding damping current, be injected into the machine end of generator model in described electric system simulation environment, suppress the subsynchronous resonance that described electric system simulation environment is excited to produce.
17. the detection system of generator subsynchronous resonance machine end damping controller as described in claim 15 or 16 is characterized in that, described detection system also comprises:
Wave recording device is for the testing result that shows described generator subsynchronous resonance machine end damping controller.
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