基于功率解耦控制的电流注入式HVDC换流器运行特性的研究

赵建阳; 张福民; 刘福贵; 刘永和

引用本文:	赵建阳,张福民,刘福贵,等.基于功率解耦控制的电流注入式HVDC换流器运行特性的研究[J].电力系统保护与控制,2016,44(10):17-23.
	ZHAO Jianyang,ZHANG Fumin,LIU Fugui,et al.Research on operating characteristics of current reinjection HVDC converter based on power decoupling controls[J].Power System Protection and Control,2016,44(10):17-23

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基于功率解耦控制的电流注入式HVDC换流器运行特性的研究
赵建阳¹,张福民¹,刘福贵¹,刘永和^2,3
(1.河北工业大学电磁场与电器可靠性省部共建重点实验室，天津 300130;2.内蒙古工业大学电力学院，内蒙古呼和浩特 010080;3.坎特伯雷大学电气与计算机系，新西兰克利斯切奇8140)

摘要:

研究基于MLCR-CSC的HVDC换流器在电网不同工况下的功率控制特性。从实际工程角度出发，设计了两组MLCR-CSC(DMLCR-CSC)协调工作的方案，提出了双组多电平电流重注入换流器(DMLCR-CSC)作为HVDC换流器。分析了DMLCR-CSC在功率解耦控制的可行性，提出了有功功率和无功功率解耦控制思想。采用的9电平DMLCR-CSC主电路晶闸管器件具备零电流关断(ZCS)特点。在输电网正常工况下，网侧单相接地故障、两相短路故障和直流侧短路故障时，换流器可以在1/6个周期内把电流降到零，并且THD含量与触发角度无关。仿真验证了DMLCR-CSC构成的HVDC换流器是高压大功率电能传输的一种可靠的选择。

关键词: DMLCR-CSC 功率解耦控制 ZCS THD 运行特性故障响应

DOI：10.7667/PSPC151123

分类号:

基金项目:

Research on operating characteristics of current reinjection HVDC converter based on power decoupling controls

ZHAO Jianyang¹,ZHANG Fumin¹,LIU Fugui¹,LIU Yonghe^2,3

(1. Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei
University of Technology, Tianjin 300130, China; ;2. Faculty of Electric Power, Inner Mongolia University of
Technology, Hohhot 010080, China; ;3. Department of Electrical and Computer Engineering,
University of Canterbury, Christchurch 8140, New Zealand)

Abstract:

This paper researches the power control features of HVDC converter under different working conditions of power grid, and HVDC converter based on MLCR-CSC. From the perspective of practical engineering, it designs a coordination operating scheme with two groups of MLCR-CSC (DMLCR-CSC), and makes the double set of multilevel current reinjection converter (DMLCR-CSC) as an HVDC converter. It analyzes the feasibility of DMLCR-CSC power decoupling contrel, and proposes the active power and reactive power decoupling control method. Thyristors of nine-level DMLCR-CSC main circuit enable zero current turn off ZCS characteristics. Under normal working condition, single-phase ground fault on AC-side, two phase short circuit fault on AC-side and short-circuit faults on DC-side can shut down current to zero within 1/6 of a cycle. THD content is not relevant with trigger angle. Simulations verify that HVDC converter based on DMLCR-CSC is a reliable choice for high-voltage and high-power power transmission.

Key words: DMLCR-CSC power decoupling control ZCS THD operating characteristics fault response

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