基于循环换流器的低频AC电力传输控制研究  

Research on low frequency AC power transmission control based on cycloconverter

作　　者：李斌[1] 肖景瑞 吴贵民 LI Bin;XIAO Jingrui;WU Guimin(DC Construction Branch,State Grid Corporation of China,Beijing 100000,China;State Grid Heilongjiang Province Songbiandian Engineering Co.,Ltd.,Harbin 150000,China)

机构地区：[1]国家电网公司直流建设分公司,北京100000 [2]国网黑龙江省送变电工程有限公司,黑龙江哈尔滨150000

出　　处：《电子设计工程》2021年第4期38-42,47,共6页Electronic Design Engineering

基　　金：辽宁省自然科学基金项目(2018A610106)。

摘　　要：针对多端低频交流输电(Low Frequency AC Transmission,LFAC)系统的功率控制问题,提出了一种新的基于循环换流器的控制方案。该控制方案包括调速器控制、虚拟同步发电机(Virtual Synchronous Generator,VSG)控制、滑动平均控制、自动电压调节控制、电压控制和电流限制器,其中VSG控制负责在各端间进行功率控制。多端系统采用带12脉冲晶闸管变换器的两相LFAC,能够在电源频率侧保持恒定功率。文中给出了详细的电路结构和应用参数,仿真结果验证了所提多端LFAC功率控制方法的有效性。Aiming at the power control problem of multi-terminal Low Frequency AC Transmission(LFAC)system,a new control scheme based on cycloconverter is proposed.The control scheme includes governor control,Virtual Synchronous Generator(VSG)control,moving average control,automatic voltage regulation control,voltage control and current limiter,in which VSG control is responsible for power control between each terminal.The multi-terminal system is composed of two-phase LFAC with 12-pulse cycloconverter,which can maintain constant power on the frequency side of the power supply.The detailed circuit structure and application parameters are given.Simulation results verify the effectiveness of the proposed multi-terminal LFAC power control method.

关 键 词：低频交流输电 多端系统 循环换流器 虚拟同步发电机 

分 类 号：TN712[电子电信—电路与系统]