DC Voltages Balancing Technology of the Multi-VSC-HVDC Parallel Operating System with DC Side in Series

SHI Xin-chun; ZHOU Guo-liang; FU Chao

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DC Voltages Balancing Technology of the Multi-VSC-HVDC Parallel Operating System with DC Side in Series

更新时间：2025-04-26

- DC Voltages Balancing Technology of the Multi-VSC-HVDC Parallel Operating System with DC Side in Series
- High VoltageApparatus Issue 3, Pages: 200-202(2008)
- 作者机构：
  
  1. 华北电力大学电力系统保护与动态安全监控教育部重点实验室
  2. 华北电力大学电力系统保护与动态安全监控教育部重点实验室河北保定071003
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM76
- Published：2008
- 稿件说明：
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[1]石新春,周国梁,付超.直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制方法[J].高压电器,2008(03):200-202.

SHI Xin-chun, ZHOU Guo-liang, FU Chao. DC Voltages Balancing Technology of the Multi-VSC-HVDC Parallel Operating System with DC Side in Series[J]. High voltageapparatus, 2008, (3): 200-202.
[1]石新春,周国梁,付超.直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制方法[J].高压电器,2008(03):200-202. DOI：

SHI Xin-chun, ZHOU Guo-liang, FU Chao. DC Voltages Balancing Technology of the Multi-VSC-HVDC Parallel Operating System with DC Side in Series[J]. High voltageapparatus, 2008, (3): 200-202. DOI：

摘要

为提高VSC-HVDC系统传输容量

可采用直流侧串联的多VSC-HVDC并联运行系统

但需解决其直流侧电压平衡问题。笔者对其平衡控制方法进行分析

对系统存在自身参数不一致、指令功率突变、交流外部故障情况进行仿真验证。为降低器件开关频率并提高波形质量

采用了载波移相的控制方法。仿真结果证实了所提出的直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制以及载波移相方法用于该系统的有效性。

Abstract

Multi-VSC-HVDC parallel operating system with DC sides in series could be adopted to increase the transmission capacity of VSC-HVDC system

and the key problem is to balance the DC voltage. Therefore

DC voltage balancing technology of the parallel operating system was analyzed in this paper. Simulation was carried out to test its performance under some typical conditions such as self parameter disparity

power command step and AC side accident. To improve the waveform quality and decrease the switching frequency of each device

CPS-PWM was adopted for system control. The DC voltages balancing method and CPS-PWM control strategy were verified by the simulated results.

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