摘要
在多端柔性直流输电中,存在换流站不能完全控制各线路潮流的问题。为了实现潮流的灵活控制,提出一种电感共用式线间直流潮流控制器。该潮流控制器通过在两条输电线路中各串入一个电容,利用共用电感进行功率交换,实现潮流控制,其拓扑结构和控制都较为简单,可模块化,适用于多端直流电网。首先分析了该潮流控制器的工作原理及控制策略,然后在PLECS仿真软件中搭建三端直流输电系统进行验证。仿真结果表明,电感共用式线间直流潮流控制器在正常供电、换流站功率缺失等多种工况下,对直流输电系统潮流进行了灵活和准确的控制。
In the multi-terminal flexible DC transmission system,there is a problem that the converter station cannot completely control the power flow of each line.For flexible control of the current,an inductor sharing interline DC power flow controller (ISI-DCPFC)is proposed.By stringing a capacitor into each transmission line and using a shared inductor for power exchange,the ISI-DCPFC achieves effective power flow control.Its topology and control are relatively simple,which can be modularized and applicable for multi-terminal direct current system.This paper firstly analyzes the operation principle and control strategy of the power flow controller,and then builds a three-terminal DC transmission system in PLECS simulation software.Simulation results show that ISI-DCPFC can flexibly and accurately control the power flow of the high voltage direct current (HVDC)transmission system under various operation conditions,such as normal power supply and power lack of converter station.
作者
张家奎
徐千鸣
罗安
马伏军
何志兴
ZHANG Jiakui;XU Qianming;LUO An;MA Fujun;HE Zhixing(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2018年第23期20-26,共7页
Automation of Electric Power Systems
基金
国家重点研发计划资助项目(2018YFB0904600)~~
关键词
直流电网
直流潮流控制器
共用电感
模块化结构
DC power grid
DC power flow controller
inductor sharing
modular structure
作者简介
张家奎(1995-),男,硕士研究生,主要研究方向:直流潮流控制器拓扑与控制。E-mail:jiakuizhang@hnu.edu.cn;徐千鸣(1989-),男,通信作者,博士,助理教授,主要研究方向:模块化多电平变换器、直流电网运行与控制。E-mail:xqm@hnu.edu.cn;罗安(1957-),男,中国工程院院士,博士,教授,主要研究方向:大功率电能变换与控制。E-mail:an_luo@126.com.
