VSC-MTDC输电系统直流电压控制策略研究VSC-MTDC输电系统直流电压控制策略研究.pdf

Transmission and Distribution Engineering and Technology 输配电工程与技术, 2014, 3, 38-46 Published Online September 2014 in Hans. /journal/tdet /10.12677/tdet.2014.33006 Research on Voltage Control Strategy of VSC-MTDC Transmission System Linsheng Sun, Juli Zhang, Xiangping Li, Xinyun Wang, Guangfeng Yao, Pengfei Hou, Gaungzhen Li Jinan CN Software Technology Limited Company, Jinan Email: chris289@126.com rd th th Received: Jul. 3 , 2014; revised: Jul. 10 , 2014; accepted: Jul. 17 , 2014 Copyright © 2014 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract A multi-terminal HVDC system (MTDC) based on voltage source converter (VSC) is built in PSCAD/ EMTDC in this paper. Each converter station has three-phase bridge topology with IGBT. Its con- trol system is designed to realize the real power control, reactive power control and DC voltage control. The principles of voltage deviation control and voltage-power drop control in VSC are analyzed. Considering the problems of voltage deviation control, an improved DC voltage control strategy is put forward. Simulation results show that integrated voltage control has quick re- sponse, power flow self-regulation, small overshoot and enhanced stability. Keywords Voltage Source Converter (VSC), Multi-Terminal HVDC System (MTDC), Voltage Deviation Control, Voltage Droop Control VSC-MTDC输电系统直流电压控制策略研究 孙林升，张居里，李香萍，王新运，姚光锋，侯鹏飞，李光镇 济南希恩软件科技有限公司，济南 Email: chris289@126.com 收稿日期：2014年7月3 日；修回日期：2014年7月10 日；录用日期：2014年7月17 日 38