A New Double-loop Voltage Stability Control Strategy Based on MMC-UPFC

TIAN Zhihao; BAI Shibin; HAN Lianshan; WANG Xinbao

doi:10.14044/j.1674-1757.pcrpc.2021.03.017

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A New Double-loop Voltage Stability Control Strategy Based on MMC-UPFC

更新时间：2024-09-14

- A New Double-loop Voltage Stability Control Strategy Based on MMC-UPFC
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 3, Pages: 105-111(2021)
- 作者机构：
  
  1. 国网宁夏电力有限公司
  2. 南京南瑞继保电气有限公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.03.017
  CLC： TM712;TM721.1
- Published：2021，
- 稿件说明：
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[1]田志浩,摆世彬,韩连山,王新宝.基于MMC-UPFC的新型双环电压稳定控制策略[J].电力电容器与无功补偿,2021,42(03):105-111.

TIAN ZHIHAO, BAI SHIBIN, HAN LIANSHAN, et al. A New Double-loop Voltage Stability Control Strategy Based on MMC-UPFC. [J]. Power capacitor & reactive power compensation, 2021, 42(3): 105-111.
[1]田志浩,摆世彬,韩连山,王新宝.基于MMC-UPFC的新型双环电压稳定控制策略[J].电力电容器与无功补偿,2021,42(03):105-111. DOI： 10.14044/j.1674-1757.pcrpc.2021.03.017.

TIAN ZHIHAO, BAI SHIBIN, HAN LIANSHAN, et al. A New Double-loop Voltage Stability Control Strategy Based on MMC-UPFC. [J]. Power capacitor & reactive power compensation, 2021, 42(3): 105-111. DOI： 10.14044/j.1674-1757.pcrpc.2021.03.017.

摘要

针对多直流馈入交流系统中

交直流故障引起的电压稳定问题

本文提出了基于MMCUPFC的新型双环电压稳定控制策略。首先基于MMC-UPFC并联换流器电压平衡方程

推导出双环控制结构(电流内环和双前馈控制外环)

其中电流内环用于控制交流侧电压稳定;双前馈控制外环一方面为电流内环提供输入参考值

另一方面反馈无功补偿量

实时追踪系统无功平衡情况

可实现稳态及故障条件下

交流系统电压快速稳定。然后

基于PSCAD搭建仿真模型进行验证

结果表明

本文所提控制策略在不同工况下均具有良好的控制性能

具有广泛适用性。

Abstract

In view of voltage stability issue due to AC and DC faults in multi-DC fed AC systems

a new double-loop voltage stability control strategy based on MMC-UPFC is proposed in this paper. Firstly

the double-loop control structure（current inner loop and double feed-forward control outer loop）is deduced based on the voltage balance equation of MMC-UPFC shunt converter

in which the current inner loop is used to control the voltage stability of AC side. The double feed-forward control outer loop

on one hand

not only provides input reference value for the current inner loop

but also

on the other hand

feedbacks the reactive power compensation

tracks real time reactive power balance situation of the system so to achieve fast stability of voltage at steady and fault conditions. Then

a simulation model based on PSCAD is set up for verification. It is shown by the result that the control strategy proposed in this paper has good control performance under different operating conditions and has wide applicability.

关键词

MMC型UPFC电压控制双电压环控制前馈协调控制

Keywords

MMC-UPFCvoltage controldouble voltage loop controlfeed forward coordinated control

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