Parameter Design and End-of-life Criterion on Sub-module Capacitor in Flexible HVDC

FANG Tian; LI Hua; LI Zheng; ZHANG Guohao; LIU Yi; LIN Fuchang

doi:10.14044/j.1674-1757.pcrpc.2020.04.011

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Parameter Design and End-of-life Criterion on Sub-module Capacitor in Flexible HVDC

更新时间：2024-09-14

- Parameter Design and End-of-life Criterion on Sub-module Capacitor in Flexible HVDC
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 41, Issue 4, Pages: 57-62(2020)
- 作者机构：
  
  华中科技大学强电磁工程与新技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2020.04.011
  CLC： TM46;TM721.1
- Published：2020，
- 稿件说明：
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[1]方田,李化,李征,张国豪,刘毅,林福昌.柔性直流输电中子模块电容参数设计及其寿命终结判据[J].电力电容器与无功补偿,2020,41(04):57-62.

FANG TIAN, LI HUA, LI ZHENG, et al. Parameter Design and End-of-life Criterion on Sub-module Capacitor in Flexible HVDC. [J]. Power capacitor & reactive power compensation, 2020, 41(4): 57-62.
[1]方田,李化,李征,张国豪,刘毅,林福昌.柔性直流输电中子模块电容参数设计及其寿命终结判据[J].电力电容器与无功补偿,2020,41(04):57-62. DOI： 10.14044/j.1674-1757.pcrpc.2020.04.011.

FANG TIAN, LI HUA, LI ZHENG, et al. Parameter Design and End-of-life Criterion on Sub-module Capacitor in Flexible HVDC. [J]. Power capacitor & reactive power compensation, 2020, 41(4): 57-62. DOI： 10.14044/j.1674-1757.pcrpc.2020.04.011.

摘要

在柔性直流输电中

直流支撑电容是模块化多电平换流器（modular multi-level converter

MMC）的关键组成部分

为子模块提供直流电压支撑

决定了子模块的电压波动范围。子模块电容的投资成本在整个系统中占了很大比例

因此电容值大小的选择对电容成本有较大的影响。本文从子模块电压稳态波动和直流系统动态响应速度两个方面考虑

对子模块电容的参数设计进行了研究。此外

当子模块电容量下降时

子模块的电容电压波动率和直流侧电压总谐波系数都会发生变化。本文在综合考虑这两种因素的情况下

通过PSCAD仿真研究

提出了直流支撑电容的寿命终结判据。

Abstract

The DC-link capacitor is a key component of modular multi-level converter（MMC） in flexible HVDC

provides DC voltage support for the sub-module and determines its voltage fluctuation range.The investment cost of sub-module capacitors accounts for a large proportion in the entire system

therefore the choice of the capacitance has a great impact on the capacitor cost.In this paper

the parameter design of the sub-module capacitor is studied with consideration of such two aspects as voltage steady-state fluctuation of the sub-module and the dynamic response speed of the DC system.In addition

when capacitance of submodule decreases

both the capacitor voltage fluctuation rate of the sub-module and the total harmonic coefficient of the DC side voltage will change.In this paper

considering the two factors

the end-of-life criterion of DC support capacitor is proposed through PSCAD simulation research.

关键词

直流支撑电容金属化膜电容柔性直流输电模块化多电平换流器寿命终结

Keywords

DC-link capacitormetallized film capacitorflexible HVDCMMCend-of-life

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