计及下垂特性的换流器静态传输功率极限分析  

An Analysis of the Static Transmission Power Limit of Converters with Droop Characteristics Taken into Account

作　　者：徐鹏 王潇潇 赵伟 李佳朋 李付强 李宇骏 XU Peng;WANG Xiaoxiao;ZHAO Wei;LI Jiapeng;LI Fuqiang;LI Yujun(North China Branch of State Grid Corporation of China,Beijing 100053,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China)

机构地区：[1]国家电网有限公司华北分部,北京100053 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电网与清洁能源》2024年第11期1-8,15,共9页Power System and Clean Energy

基　　金：国家自然科学基金项目(52277122);国家电网有限公司科技项目资助(1100/2022-02001B)。

摘　　要：针对计及下垂特性的换流器静态传输功率极限进行了分析研究。推导了计及下垂控制的换流器静态传输功率极限的近似解析解;提出了一种在公共连接点处无功补偿装置的配置方法;考虑到换流器作为电力电子器件所具有的容量限制,并结合交流系统的电压变化,分析了计及下垂特性的新能源并网换流器的稳定运行边界;探究了交流系统电压、无功功率参考值、下垂系数以及无功补偿装置容量的变化对换流器传输功率极限的影响规律。The static transmission power limit of the converter is analyzed with the droop characteristics taken into account in this paper.First,the approximate analytical solution of the static transmission power limit of the inverter considering droop control is derived.Second,a configuration method of the reactive power compensation device at the common connection point is proposed.On this basis,considering the capacity limitation of the converter as a power electronic device,and combined with the voltage change of the AC system,the stable operation boundary of the new energy grid-connected converter considering the droop characteristics is analyzed.Finally,the influence of AC system voltage,reactive power reference value,droop coefficient and reactive power compensation device capacity on the transmission power limit of the converter is explored.

关 键 词：新能源并网 静态传输功率极限 下垂控制 换流器 

分 类 号：TM712[电气工程—电力系统及自动化]