孤岛运行方式下柔性直流配网高次谐波谐振及抑制措施研究  

Research on High Order Harmonic Resonance and Suppression Measures of Flexible DC Distribution Network Under Isolated Operation Mode

作　　者：李书亚 解绍锋[1] 马智泉 LI Shuya;XIE Shaofeng;MA Zhiquan(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610041,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China)

机构地区：[1]西南交通大学电气工程学院,成都610041 [2]国网浙江省电力有限公司电力科学研究院,杭州310014

出　　处：《电力电容器与无功补偿》2023年第5期81-88,共8页Power Capacitor & Reactive Power Compensation

摘　　要：针对孤岛运行方式下柔性直流配电网系统高次谐波谐振问题,基于电缆分布参数模型建立柔性直流配网的数学模型,推导出谐波电压增益的通用数学表达式,并对孤岛运行方式下某实际柔性直流配网系统的高频谐波谐振特性进行了分析。在PSCAD/EMTDC仿真平台上搭建基于电缆频率相关模型—Phase模型的孤岛柔性直流配网仿真模型,实测数据验证了仿真模型的准确性,通过仿真模型证实谐波电压增益通用数学表达式的有效性。结合实测数据与仿真结果提出一种适用于柔性直流配网谐波的混合无源滤波器,并基于仿真模型对其滤波特性进行验证。仿真结果表明:混合无源滤波器不仅能有效滤除柔性直流配网系统中的高次谐波带以及特定次数的低次谐波,还会改善系统谐振特性,提高系统的电能质量。In view of the high order harmonic resonance of flexible DC distribution system under island operation mode,the mathematical model of flexible DC distribution network is set up on the basis of cable distribution parameter model,the general mathematical expression of harmonic voltage gain is deduced,and high frequency harmonic resonance characteristic of certain actual flexible DC distribution network system under the isolated operatino mode is analyzed.On the PSCAD/EMTDC simulation platform,an island flexible DC distribution network simulation model based on the cable frequency correlation model—PHASE model is set up.The accuracy of the simulated model is verified by the actually measured data and the the effectiveness of the general mathematical expression of the garmonic voltage gain is verified by the simulation model.On the basis of the actually measured data and the simulation results,a kind of hybrid passive filter for the flexible DC distribution network is proposed,and its filtering characteristics are verified based on the simulation model.The simulation results show that the hybrid passive filter can not only effectively filter the high order harmonic band and the specific number of low order harmonic in the flexible DC distribution network system,but also improve the resonance characteristic of the system and enhance the power quality of the system.

关 键 词：柔性直流配网 分布参数模型 谐波电压增益 Phase模型 混合无源滤波器 

分 类 号：TM721.1[电气工程—电力系统及自动化]