Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller

A technology of subsynchronous resonance and damping controller, applied in the field of electric power system, can solve the problems of high cost, low efficiency of detection method, long test period, etc.

Active Publication Date: 2013-05-15
NORTH CHINA ELECTRICAL POWER RES INST +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a detection method and system for a generator sub-synchronous resonance machine-end damping controller to solve the problems existing in the prior art, such as low efficiency, long test period and high cost. The problem

Method used

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  • Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller
  • Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller
  • Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller

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Effect test

Embodiment 1

[0047] If you want to verify the suppression effect of the subsynchronous resonance damping controller at the generator end on the subsynchronous resonance, the following method is used: Figure 8 The method flow shown. which is:

[0048] Step S801: Establish a power system simulation environment including a generator model, an excitation system and a speed control system, and a 12-chain H-bridge cascaded voltage source converter model and its step-up model on the real-time digital simulation system software platform according to the above method. Transformer model;

[0049] Step S802, the power system simulation environment provides electrical signals including generator terminal voltage, generator speed signal and converter model output current signal to the control cabinet of the generator subsynchronous resonance machine-side damping controller . In this step, analog quantities such as generator terminal voltage, converter output current, and generator speed signal are ...

Embodiment 2

[0054] That is, if you want to verify whether the simulation model of the generator-end subsynchronous resonant damping controller is consistent with the dynamic characteristics of the actual generator-end subsynchronous resonant damping controller, use the following method: Figure 10 The method flow shown, namely:

[0055] Step S1001, establishing a simulation model of the generator subsynchronous resonance machine-end damping controller including the control module, the damping current generation module and its step-up transformer model;

[0056] Step S1002, the control module receives the terminal voltage signal of the generator model in the power system simulation environment and the generator speed signal, and generates the damping current required to suppress the subsynchronous resonance generated by the excitation of the power system simulation environment control signal;

[0057] Step S1003, the damping current generation module receives the damping current control s...

Embodiment 3

[0063] If you want to verify whether the synchronous resonance damping controller at the end of the generator can coordinate with the control function of the conventional excitation system, use the following method: Figure 12 The method flow shown, namely:

[0064] Step S1201, putting the generator subsynchronous resonance machine-end damping controller into operation;

[0065] Step S1202, setting a step disturbance of 5% of the rated voltage of the generator in the power system simulation environment;

[0066] Step S1203 , detecting whether the control function of the excitation system in the power system simulation environment on the machine terminal voltage of the generator is affected by the normal operation of the generator subsynchronous resonance machine terminal damping controller.

[0067] In this embodiment, the power system simulation environment model is set up on the real-time digital simulation system software platform according to the above method, and the ter...

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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 [0001] The invention relates to the field of power systems, in particular to the problem of suppressing subsynchronous resonance in the power system, and specifically relates to a detection method and system for a generator subsynchronous resonance machine end damping controller. Background technique [0002] The sub-synchronous resonance problem of the generator affects the normal transmission of power. Installing the generator sub-synchronous resonance machine-side damping controller at the generator end is a method to solve the sub-synchronous problem. The closed-loop dynamic performance testing test of generator subsynchronous resonant machine-side damping controller (GTSDC) can be realized in the traditional physical dynamic simulation environment, that is, using real but scaled-down electrical components to construct a simulated power system, and observing the Dynamic performance of a synchronous resonant machine-side damping controller under closed loo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02G05B17/02
Inventor 吴涛曹天植
Owner NORTH CHINA ELECTRICAL POWER RES INST
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