基于改进瞬时对称分量法的STATCOM负序、零序电流优先补偿策略  

Priority Compensation Strategy for Negative Sequence and Zero Sequence Currents of STATCOM Based on Improved Instantaneous Symmetrical Component Method

作　　者：杨鑫 YANG Xin(MCC Huatian Nanjing Engineering Technology Co.,Ltd.,Nanjing,Jiangsu 210019,China)

机构地区：[1]中冶华天南京工程技术有限公司,江苏南京210019

出　　处：《自动化应用》2024年第9期215-218,共4页Automation Application

摘　　要：为了提高三相四线制电力系统中静止同步补偿器(STATCOM)在补偿负荷中的利用率,基于改进的瞬时对称分量法提出了一种针对STATCOM的负序、零序电流优先补偿策略。该策略将系统参数分解成为正序、负序和零序网络后,得到实时的正序、负序和零序分量。利用控制负序电流和零序电流补偿三相负载不对称产生的负序分量和零序分量。利用控制正序电流补偿系统波动产生的谐波分量和无功分量。当STATCOM补偿容量不足时,优先补偿负序电流和零序电流,尽可能地补偿无功电流。结果表明,该补偿方法可以使STATCOM准确地动态补偿配电网三相负荷不平衡产生的负序、零序分量。In order to improve the utilization of load compensation by three-phase four wire power system static synchronous compensator(STATCOM),this paper based on the improved instantaneous symmetrical component method proposed a negative and zero sequence current preferred compensation strategy for STATCOM.This strategy decomposes system parameters into positive sequence,negative sequence,and zero sequence networks to obtain real-time positive sequence,negative sequence,and zero sequence components.Utilize control of negative sequence current and zero sequence current to compensate for the negative sequence and zero sequence components generated by three-phase load asymmetry.Utilize the control of positive sequence current to compensate for the harmonic and reactive components generated by system fluctuations.When the compensation capacity of STATCOM is insufficient,priority should be given to compensating for negative sequence current and zero sequence current,and reactive current should be compensated as much as possible.The simulation results show that the proposed compensation method can make the STATCOM accurately and dynamically compensate the negative and zero sequence component of unbalanced three-phase load in distribution network.

关 键 词：STATCOM 负序、零序电流 改进瞬时对称分量 

分 类 号：TM761[电气工程—电力系统及自动化]