Clustered Voltage Balancing Mechanism and Its Control Strategy for Star-Connected Cascaded H-Bridge STATCOM

被引：50

作者：

Lu, Daorong ^{[1
]}

Wang, Jiangfeng ^{[1
]}

Yao, Jianhui ^{[1
]}

Wang, Sen ^{[1
]}

Zhu, Jianxin ^{[1
]}

Hu, Haibing ^{[1
]}

Zhang, Li ^{[2
,3
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Jiangsu Key Lab New Energy Generat & Power Conver, Nanjing 210016, Jiangsu, Peoples R China

[2] Hohai Univ, Coll Energy & Elect Engn, Nanjing 211100, Jiangsu, Peoples R China

[3] Hohai Univ, Minist Educ, Res Ctr Renewable Energy Generat Engn, Nanjing 211100, Jiangsu, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2017年 / 64卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Cascaded H-bridge (CHB) STATCOM; clustered voltage balancing control; self-stabilizing feature; PWM CONVERTER; MULTILEVEL; TOPOLOGIES;

D O I：

10.1109/TIE.2017.2694390

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

To explore the clustered voltage balancing mechanism of the star-connected cascaded H-Bridge (SCHB) STATCOM, this paper analyzes the relationship between the active power and the control variablesmodulation reference voltages in a dq frame through positive and negative sequence component decomposition. The derived relationship in the dq frame reveals that the negative sequence modulation reference voltage is capable of redistributing the active power among three phases and also the SCHB STATCOM features the clustered voltage self-stabilizing without any additional clustered voltage balancing control. To eliminate the differences of three clustered voltages, a new clustered voltage balancing control is proposed by regulating negative sequence modulation reference voltage in the dq frame. Its balancing mechanism is analyzed in detail and a simple implementation is presented as well. The effectiveness of the proposed control is verified by experimental results on a 400 V/15 kvar SCHB STATCOM.

引用

页码：7623 / 7633

页数：11

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