Analysis on Mechanism of Power Oscillation Mitigation by STATCOM

doi:10.7652/xjtuxb201712017

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Analysis on Mechanism of Power Oscillation Mitigation by STATCOM

更新时间：2025-07-09

- Analysis on Mechanism of Power Oscillation Mitigation by STATCOM
- Vol. 51, Issue 12, Pages: 112-120(2017)
- 作者机构：
  
  南京工程学院自动化学院,南京,211167
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201712017
  CLC： TM315
- Online First：10 December 2017，
  
  Published：2017
- 稿件说明：
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Analysis on Mechanism of Power Oscillation Mitigation by STATCOM[J]. 2017, 51(12): 112-120.
DOI：

Analysis on Mechanism of Power Oscillation Mitigation by STATCOM[J]. 2017, 51(12): 112-120. DOI： 10.7652/xjtuxb201712017.

摘要

为了揭示静止同步补偿器抑制电网功率振荡的机理

基于电气转矩分析法通过建立含静止同步补偿器的单机无穷大电网的机电尺度数学模型

分析了静止同步补偿器在电网功率振荡抑制模式下影响同步发电机动态特性的物理机制

解释了不同控制策略影响电网等效惯性系数、同步系数与阻尼系数的原理。研究结果表明:反馈同步机功角时

P、D控制器分别等效地改变系统的等效同步系数和等效阻尼系数; 反馈发电机转速时

P、I、D控制器则分别等效地改变系统的等效阻尼系数、同步系数、惯性系数; 上述动态参数均随P、I、D控制器控制系数的增大而增加。为了充分发挥静止同步补偿器对电网功率振荡的抑制作用

进一步分析了影响振荡抑制性能的关键因素及其作用规律

可为静止同步补偿器控制策略的分析和设计提供理论基础。仿真结果验证了静止同步补偿器抑制电网功率振荡机理分析结论的正确性。

Abstract

A model of the single-machine infinite-bus system containing STATCOM on the electromechanical time scale is deduced to understand the mechanism of STATCOM affecting the grid power oscillation. The dynamic physical mechanism of STATCOM affecting the transient performance of synchronous generator in the power oscillation mitigation mode is discussed by adopting the method of electrical torque analysis. The results show that when the power angle is used as feedback signal

P and D controllers affect the synchronizing and the damping characteristics of the synchronous generator

respectively; and when the rotor speed is utilized as the feedback signal

I and D controllers affect the damping

synchronizing and inertia characteristics

respectively. In addition

the principles of different control strategies that influence the equivalent inertia

the synchronizing and the damping coefficients of the power grid are explained. Moreover

the important factors that influence the performance of power oscillation mitigation are analyzed

providing a theoretical foundation for the design of STATCOM control strategies. Simulation results show the correctness of the conclusions derived in this paper.

关键词

Keywords

references

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