交直流配电网逆变器并联控制技术研究现状分析  

Analysis on Research Status of Parallel Inverters Control Technologies for AC/DC Distribution Network

作　　者：曹文远 韩民晓 谢文强 李蕊[2] Cao Wenyuan;Han Minxiao;Xie Wenqiang;Li Rui(State Key Laboratory of Alternate Electrical Power System with Renewable Energy,Source North China Electric Power University,Beijing,102206,China;China Electric Power Research Institute,Beijing,100192,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]中国电力科学研究院,北京100192

出　　处：《电工技术学报》2019年第20期4226-4241,共16页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划“直流配用电系统电压等级序列及典型供用电模式研究”(2018YFB0904701);国家电网公司科技项目“直流配网用关键设备拓扑研究及样机研制”(PD71-17-013)

摘　　要：逆变器是交直流电网互联和可再生能源并网的重要接口。随着直流配电技术的发展和电力系统中可再生能源接入比例的增加,逆变器的并联运行控制成为维持电力系统稳定运行和提高供电质量的关键技术问题。该文首先提出交直流配电网中逆变器并联运行的典型应用场景,接着考虑配电网中逆变器的空间距离跨度大、网络参数无法忽略的特点,建立多逆变器并联运行模型并推导逆变器间环流的计算公式。对已有较多研究的多逆变器并联运行控制方法进行了归纳和总结,尤其是对下垂控制存在的功率耦合、功率均分和电能质量问题以及相应的研究工作进行了分析和评述,最后指出适用于交直流配电网的逆变器并联运行控制方法及其所要解决的关键问题。Inverters are important interfaces for the interconnection of AC/DC power grids and the integration of renewable energy.With the development of DC power distribution technology and the increasing proportion of renewable energy access in power systems,the parallel operation control of inverters has become a key technical issue to maintain the stability of power system and improve the power quality.Firstly,three typical application scenarios of parallel inverters in AC/DC power distribution networks were put forward.Since the spatial distance between inverters is large and network parameters cannot be ignored,a model of parallel operated multi-inverter was then established,and the formula of the circulation between inverters was also derived.Furthermore,control methods for parallel inverters have been summarized.The problems and the related studies of power coupling,power sharing and power quality of the droop control were analyzed and reviewed.Finally,the control methods for parallel inverters suitable for AC/DC distribution network and the key problems to be solved were pointed out.

关 键 词：逆变器 并联运行控制 交直流配电网 环流 

分 类 号：TM464[电气工程—电器]