考虑系统损耗的MMC换流阀冗余配置策略

黄守道; 王海宁; 荣飞; 饶宏; 周保荣

引用本文:	黄守道,王海宁,荣飞,等.考虑系统损耗的MMC换流阀冗余配置策略[J].电力系统保护与控制,2018,46(6):1-8.
	HUANG Shoudao,WANG Haining,RONG Fei,et al.Redundant configuration strategy of MMC converter valve considering system loss[J].Power System Protection and Control,2018,46(6):1-8

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考虑系统损耗的MMC换流阀冗余配置策略
黄守道¹,王海宁¹,荣飞¹,饶宏²,周保荣²
(1.湖南大学电气与信息工程学院，湖南长沙 410082; 2.直流输电技术国家重点实验室，南方电网科学研究院有限责任公司，广东广州 510620)

摘要:

模块化多电平换流阀具有扩展性强、响应速度快等优点，现已成为柔性直流输电工程建设的首选。其可靠性关系到整个输电系统的安全运行，而损耗特性则关系到输电系统的经济运行。为了提高柔性直流输电系统的可靠性，对换流阀一般会设置一定的冗余度，但过高的冗余度又会带来严重的损耗。基于以上考虑，分析了冗余度与可靠性、损耗的关系，推导了其数学解析表达式。然后，提出了一种基于多目标优化的MMC换流阀冗余度优化配置方法，使得柔性直流输电系统能兼顾可靠性和损耗。最后通过工程算例对所提出的方法进行了验证，表明采用所提出的方法能提高柔性直流输电系统的综合性能。

关键词: MMC 柔性直流输电可靠性损耗冗余度

DOI：10.7667/PSPC170340

分类号:

基金项目:国家重点研发计划(2016YFB0901001)

Redundant configuration strategy of MMC converter valve considering system loss

HUANG Shoudao¹,WANG Haining¹,RONG Fei¹,RAO Hong²,ZHOU Baorong²

(1. College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;2. State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid, Guangzhou 510620, China)

Abstract:

Modular multi-level converter valve has the advantages of strong expansibility and fast response, etc., and has become the first choice for the construction of flexible HVDC transmission project. Its reliability is related to the safe operation of the whole transmission system, and the loss characteristic is related to the economic operation of the transmission system. In order to improve the reliability of flexible DC transmission system, the converter valve will generally set a certain degree of redundancy, but too high redundancy will bring serious losses. Based on the above considerations, this paper analyzes the relationship between redundancy and reliability and loss, and deduces its mathematical analytical expression. Then, a new optimization method of redundancy of MMC converter valve based on multi-objective optimization is proposed, which can make the HVDC system take into account the reliability and loss. Finally, the method proposed in this paper is verified by engineering examples, which shows that the proposed method can improve the comprehensive performance of the HVDC transmission system. This work is supported by National Key Research and Development Program of China (No. 2016YFB0901001).

Key words: MMC flexible DC transmission reliability loss redundancy

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