考虑高压直流输电系统无功特性的低压限流参数设置

李瑶佳; 汪娟娟; 李子林; 梁泽勇; 黄梦华; 王子民

引用本文:	李瑶佳,汪娟娟,李子林,等.考虑高压直流输电系统无功特性的低压限流参数设置[J].电力系统保护与控制,2017,45(16):16-23.
	LI Yaojia,WANG Juanjuan,LI Zilin,et al.VDCOL parameters setting influenced by reactive power characteristics of HVDC system[J].Power System Protection and Control,2017,45(16):16-23

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考虑高压直流输电系统无功特性的低压限流参数设置
李瑶佳¹,汪娟娟¹,李子林¹,梁泽勇²,黄梦华¹,王子民¹
(1.华南理工大学，广东广州 510640;2.广东省电力设计研究院，广东广州 510663)

摘要:

高压直流控制系统中的低压限流(VDCOL)环节能够限制低电压下的直流电流，减少故障和恢复期间的无功需求，有助于系统恢复稳定。VDCOL控制参数的合理设置，对系统恢复性能的改善至关重要。从高压直流输电系统无功特性的角度对VDCOL参数的设置方法进行了深入研究。首先，基于VDCOL电压-电流特性，对包含VDCOL的直流输电系统运行特性进行了详细分析。在此基础上，再以VDCOL参数和交流母线电压为自变量，以直流换流站无功交换量为因变量，对VDCOL各参数范围的设置进行了解析。最后，在PSCAD/EMTDC软件中的GIGRE直流模型上进行了仿真验证，仿真结果与解析结果相吻合，证明了上述解析方法的正确性和有效性。研究成果对提高高压直流输电系统稳态和动态性能均有参考意义。

关键词: 低压限流参数范围无功交换恢复特性

DOI：10.7667/PSPC161291

分类号:

基金项目:国家自然科学基金青年基金资助项目(51207057)

VDCOL parameters setting influenced by reactive power characteristics of HVDC system

LI Yaojia¹,WANG Juanjuan¹,LI Zilin¹,LIANG Zeyong²,HUANG Menghua¹,WANG Zimin¹

(1. South China University of Technology, Guangzhou 510640, China;2. Guangdong Electric Power Design Institute, Guangzhou 510663, China)

Abstract:

Voltage dependent current order limiter (VDCOL) can limit the HVDC current in low voltage and reduce the reactive power requirement, which helps power system quickly restore stability. Thus, the reasonable setting of VDCOL control parameters is vital to improve the recovery characteristics of system. This paper makes a deep research about VDCOL parameters setting method with reactive power characteristics of HVDC system considered. Firstly, based on the voltage-current characteristics of VDCOL, this paper makes a detail analysis about operating characteristics of HVDC system with VDCOL involved. On this basis, it makes an analysis about the range of VDCOL parameters, which considers VDCOL parameters and AC voltage as independent variables, and reactive power exchange as dependent variable. Finally, the simulation, which tests the optimal setting range of VDCOL parameters, is carried out in the CIGRE HVDC model of PSCAD/EMTDC, whose results are in agreement with the analytical results, thus proves the correctness and effectiveness of the analytical method. The research results have reference significance for improving the stability and dynamic capability of HVDC system. This work is supported by Youth National Natural Science Foundation of China (No. 51207057).

Key words: VDCOL range of parameters reactive power exchange recovery characteristic

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