摘要
介绍一种基于有源换相换流器ACC(active commutated converter)的高压直流HVDC(high voltage direct current)输电系统,分析有源换相换流器在两相旋转坐标系下的数学模型,提出了一种含附加虚拟项的基于比例谐振PR(proportional resonant)控制器的控制策略,并对控制器参数进行了设计,实现了负序电网电流的抑制和换流器的单位功率因数运行。最后,在PSCAD/EMTDC中搭建仿真模型,仿真结果验证了所提出的交流故障穿越策略的正确性和有效性。
An active commutated converter(ACC)based high voltage direct current(HVDC)transmission system is introduced,and the mathematical model of ACC under a two-phase rotating coordinate system is analyzed.Then,a control strategy based on the proportional resonant(PR)controller is also presented,which includes an additional virtual item,thus realizing the elimination of negative-sequence grid current and the unity power factor operation of the converter.Finally,the results of a simulation model built in PSCADZEMTDC verify the correctness and efiectiveness of the proposed AC fault ride-through strategy.
作者
陈国华
CHEN Guohua(Schoolof Further Education,Shijiazhuang Tiedao University,Shijiazhuang 050000,China)
出处
《电源学报》
CSCD
北大核心
2023年第3期89-98,共10页
Journal of Power Supply
基金
河北省教育厅高等教育教学改革研究与实践资助项目(2018GJJG240)。
关键词
有源换相换流器
高压直流输电
交流故障穿越
单位功率因数运行
控制器设计
active commutated converter(ACC)
high voltage direct current(HVDC)transmission
AC fault ride-through
unity power factor operation
controller design
