基于改进模态分析法的广域配用电系统谐波谐振分析  

Harmonic resonance analysis of wide-area power distribution system based on improved modal analysis method

作　　者：王玲 吕鸿 杜婉琳 汪进锋 朱远哲 WANG Ling;LÜHong;DU Wanlin;WANG Jinfeng;ZHU Yuanzhe(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Guangdong Provincial Key Laboratory of Electric Power Equipment Reliability,Guangzhou 510080,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]广东省电力装备可靠性企业重点实验室,广东广州510080

出　　处：《供用电》2025年第3期86-93,114,共9页Distribution & Utilization

基　　金：中国南方电网有限责任公司科技项目(GDKJXM 20210172)。

摘　　要：配用电系统是可再生能源消纳的重要载体,其电力电子化趋势日益显著。可再生能源经由长距离输电线路接入配用电系统,线路分布参数不容忽略。传统电力装置和新型电力电子装置等多类型电力装置通过输电线路紧密耦合,导致系统谐振风险大大增加,谐振分析建模难度骤增。基于模态分析法,综合考虑网络拓扑、输电线路分布参数和新能源并网变流器等多类要素,开展高比例可再生能源配用电系统谐波谐振劣化分析。结合配用电系统各类元部件的数学描述,构建了配用电系统“装置-网络”统一模型。基于此,提出了高度电力电子化背景下配用电系统谐波谐振分析的通用方法。最后通过算例验证了其所提方法的正确性和工程价值,可为谐振的预测和治理提供理论指导。The power distribution system is an important carrier for renewable energy consumption,and its power electronics trend is becoming increasingly significant.Renewable energy is connected to the power distribution system through long-distance transmission lines,and the line distribution parameters cannot be ignored;Multiple types of power devices such as traditional power devices and new power electronic devices are closely coupled through transmission lines,which greatly increases the risk of system resonance and the difficulty of resonance analysis modeling.Based on the modal analysis method,this paper comprehensively considers multiple factors such as network topology,transmission line distribution parameters and new energy grid-connected converters to carry out harmonic resonance degradation analysis of high-proportion renewable energy distribution systems.Combined with the mathematical description of various components of the power distribution system,a unified device-network model of the power distribution system is constructed.Based on this,a general method for harmonic resonance analysis of the power distribution system under the background of high power electronic is proposed.Finally,the correctness and engineering value of the proposed method are verified by examples,which can provide theoretical guidance for the prediction and control of resonance.

关 键 词：谐波谐振 模态分析 电力电子化 配用电系统 电能质量 阻抗模型 

分 类 号：TM71[电气工程—电力系统及自动化]