高压直流定无功功率交流故障恢复方法

HUANG Menghua

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高压直流定无功功率交流故障恢复方法

更新时间：2025-08-13

- 高压直流定无功功率交流故障恢复方法
- Automation of Electric Power Systems Vol. 42, Issue 3, Pages: 143-148(2018)
- 作者机构：
  
  华南理工大学电力学院,广东省,广州市,510641
- 作者简介：
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- DOI：
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- Published：2018
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HUANG Menghua. [J]. Automation of electric power systems, 2018, 42(3): 143-148.
DOI：

HUANG Menghua. [J]. Automation of electric power systems, 2018, 42(3): 143-148. DOI：

摘要

高压直流系统无功功率动态特性与直流控制强相关，对受端交流系统故障电压恢复特性具有显著影响。为此，研究了直流控制与无功功率动态特性的相互作用关系及其对故障恢复的影响。首先，分析受端交流系统故障时直流系统固有的无功功率动态特性，在此基础上，研究直流电流指令值、交流母线电压与无功功率交换量之间的动态相关性，提出低压限流功能的替代方案。接着，针对交流母线电压的不同故障水平，进一步研究了交流系统与换流站在不同交流电压水平下的无功功率交换能力。最后，仿真验证了在对称故障下所提替代方案能够提升交流故障支撑能力，改善系统的故障恢复性能，降低系统恢复过程中发生换相失败的概率。

Abstract

The reactive power dynamic characteristics of high voltage direct current(HVDC)transmission system are strongly correlated with the HVDC control

which has a significant effect on the AC fault recovery characteristics of the AC grid at the receiving terminal. So the interaction between HVDC control and reactive dynamic characteristics and its effect on AC fault recovery are studied. Firstly

the inherent reactive dynamic characteristic of HVDC system during the AC fault at the receiving terminal is analyzed. On this basis

an alternative method of voltage dependent current order limitation(VDCOL)in HVDC is proposed

where the relationship among the DC current command

the AC bus voltage and the reactive power exchange capacity is studied. Then

according to the different levels of the AC bus voltage

the reactive power exchange capacity of the AC system and the converter station is further studied. Finally

the simulation proves that the improved VDCOL proposed can improve the system fault recovery performance and reduce the probability of commutation failure.

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