Active and Reactive Power Compensation Control Strategy for VSC-HVDC Systems under Unbalanced Grid Conditions

被引：8

作者：

Liu, Weiming ^{[1
]}

Zheng, Tingting ^{[1
]}

Liu, Ziwen ^{[2
]}

Fan, Zhihua ^{[2
]}

Kang, Yilong ^{[2
]}

Wang, Da ^{[1
]}

Zhang, Mingming ^{[1
]}

Miao, Shihong ^{[2
]}

机构：

[1] State Grid East Inner Mongolia Elect Power Res In, Hohhot 010020, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China

来源：

ENERGIES | 2018年 / 11卷 / 11期

基金：

中国国家自然科学基金;

关键词：

VSC-HVDC; unbalanced grid conditions; double frequency ripples; power compensation; passive-based control; disturbance observer; VOLTAGE; FAULTS;

D O I：

10.3390/en11113140

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper presents a power compensation strategy to suppress the double frequency power ripples of Voltage source converter high-voltage direct current (VSC-HVDC) systems under unbalanced grid voltage conditions. The mathematical control equations of the double frequency ripple power of VSC under unbalanced operating conditions are firstly derived and established, where the dynamic behaviors of the double frequency ripples in active and reactive power are regarded as being driven by current-relevant components and voltage-relevant components, respectively. Based on the equations, a power compensation control strategy of VSC-HVDC is proposed via the passivity-based control with disturbance observer to suppress both the current-relevant and voltage-relevant components in the power ripples. With this control strategy, the double frequency ripples in active and reactive power are suppressed simultaneously and system performance is significantly enhanced with the implementation of the disturbance observer in the passivity-based control. Theoretical stability analysis and simulation cases show the effectiveness and superiority of the proposed strategy.

引用

页数：19

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