提高系统暂态稳定性的柔性直流受端电网故障穿越策略整定

YU Zhao

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提高系统暂态稳定性的柔性直流受端电网故障穿越策略整定

更新时间：2025-08-13

- 提高系统暂态稳定性的柔性直流受端电网故障穿越策略整定
- Automation of Electric Power Systems Vol. 42, Issue 22, Pages: 78-84(2018)
- 作者机构：
  
  国家电力调度控制中心,北京市,100031
- 作者简介：
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- Published：2018
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YU Zhao. [J]. Automation of electric power systems, 2018, 42(22): 78-84.
DOI：

YU Zhao. [J]. Automation of electric power systems, 2018, 42(22): 78-84. DOI：

摘要

随着大容量柔性直流输电技术日趋成熟，其在大电网中的应用愈发广泛。充分利用柔性直流灵活、快速的调节性能，设计合理的控制策略，有利于提升系统的安全稳定特性。文中重点针对柔性直流的交流故障穿越策略，利用扩展等面积法则(EEAC)分析了其影响系统暂态稳定性的机理。提出一种提高系统暂态稳定性的故障穿越策略工程优化整定方法。通过优化柔直在故障穿越期间的无功控制目标、低穿电压阈值、故障穿越期间的有功和无功电流限值以及故障穿越的恢复电压阈值，可显著提升柔性直流接入系统的暂态稳定特性。在规划系统仿真中验证了所提方法的有效性，可为实际柔性直流接入系统的控制策略优化及方式安排提供技术支撑。

Abstract

With the development of large-capacity flexible high voltage direct current(HVDC)transmission technology

its application in large power grid is more and more extensive. It is helpful to design reasonable control strategy to improve the safety and stability of the power system by making full use of the flexible and fast adjustment performance of flexible HVDC. In this paper

the influence of AC fault ride-through strategy of flexible HVDC on the transient stability of the system is analyzed by extended equal-area criterion(EEAC). An AC fault ride-through strategy of flexible HVDC engineering optimization method is proposed. By optimizing flexible HVDC reactive power target-control

low voltage threshold

the active and reactive current limit during fault crossing and fault ride-through recovery voltage threshold

the transient stability of the system with flexible HVDC can be improved remarkably. The effectiveness of the proposed method is verified in the planning system simulation. The proposed method can provide technical support for the control strategy optimization and mode arrangement of flexible HVDC system.

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