Improved Decoupling Control Strategy of MMC-HVDC System Connected to the Weak AC Power Grid

被引：1

作者：

Li, Bingkun ^{[1
]}

Li, Hongguang ^{[2
]}

Wang, Gang ^{[3
]}

机构：

[1] China Southern Power Grid Co Ltd, Digital Grid Res Inst, Guangzhou, Peoples R China

[2] Power Grid Co Ltd, Guangzhou Power Supply Bur Guangdong, Guangzhou, Peoples R China

[3] South China Univ Technol, Sch Elect Power Engn, Guangzhou, Peoples R China

来源：

JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY | 2022年 / 17卷 / 02期

基金：

中国国家自然科学基金;

关键词：

MMC-HVDC; Weak AC power grid; Improved decoupling control strategy; Coupling mechanism; Dynamic feedforward compensation; MODULAR MULTILEVEL CONVERTERS;

D O I：

10.1007/s42835-021-00945-9

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In order to make full use of the regulation capabilities and avoid energy loss caused by coupling effect, a mathematical model of MMC-HVDC system was deduced. Subsequently, the coupling mechanism between the AC current and stations of the MMC system were analyzed via nonlinear equation. On the basis of mechanism analysis, the effects of inter-coupling in MMC-HVDC system connected to weak AC power grid were weakened by adding the dynamic feedforward compensation into the control system. In addition, to ensure the system stability and improve dynamic performance of the proposed controller, the control parameters design method was proposed based on the Hurwitz criterion and the time-domain mathematical calculations. By combining the two parts of the control system, an improved decoupling control strategy applicable to MMC system was proposed. Taking MMC-HVDC system as an example, the simulation based on PSCAD/ EMTDC verified the effectiveness of the proposed method.

引用

页码：819 / 833

页数：15

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