Transient Reactive Power Control Strategy of Communication-free Based VSC-MTDC System

YU Lei; LIU Zhiqiang

doi:10.14044/j.1674-1757.pcrpc.2021.04.018

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Transient Reactive Power Control Strategy of Communication-free Based VSC-MTDC System

更新时间：2024-09-14

- Transient Reactive Power Control Strategy of Communication-free Based VSC-MTDC System
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 4, Pages: 134-140(2021)
- 作者机构：
  
  1. 钦州市卫生学校
  2. 华北电力大学新能源电力系统国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.04.018
  CLC： TM712
- Published：2021，
- 稿件说明：
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YU LEI, LIU ZHIQIANG. Transient Reactive Power Control Strategy of Communication-free Based VSC-MTDC System. [J]. Power capacitor & reactive power compensation, 2021, 42(4): 134-140.
DOI：

YU LEI, LIU ZHIQIANG. Transient Reactive Power Control Strategy of Communication-free Based VSC-MTDC System. [J]. Power capacitor & reactive power compensation, 2021, 42(4): 134-140. DOI： 10.14044/j.1674-1757.pcrpc.2021.04.018.

摘要

最新研究表明无功控制是提高VSC-MTDC系统暂态稳定的重要手段之一。然而

目前无功控制受通信延迟影响

暂态稳定控制效果欠佳。针对此

本文提出基于免通信的VSC-MTDC系统暂态无功控制策略。该策略充分利用直流侧电压降压控制中的局部辅助有功调制信息

仅需局部测量值即可估计得到全局频率加权值

并以该频率加权值作为换流站辅助无功功率控制的参考值进行控制。基于PSS/E对所提控制方法进行仿真验证

结果表明该方法与使用全局测量信息的控制策略性能相近

可显著提高系统暂态稳定性。

Abstract

The recent research shows that the reactive power control is one of the important means to improve the transient stability of VSC-MTDC system. However

the transient stability control effect of current reactive power control is weak due to communication delay. In view of this

the transient reactive power control strategy of communication-free based VSC-MTDC system is proposed in this paper. The strategy makes full use of the local auxiliary active power modulation information in the control of voltage drop of DC side. Only local measurements are needed to estimate the global frequency weighted value

and the frequency weighted value is used as the reference value of auxiliary reactive power control in converter station for the purpose of control. The proposed control method is simulated and verified based on PSS/E.The result shows that the control strategy performance of the method is very close to that using the global measurement information

which can improve significantly the transient stability of the system.

关键词

免通信VSC-MTDC暂态稳定无功控制

Keywords

communication-freeVSC-MTDCtransient stabilityreactive power control

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