含多类型分布式电源的交直流混合微电网系统潮流控制策略研究  

Research on Power Flow Control Strategy of AC/DC Hybrid Microgrid System with Multi-type Distributed Power Supply

作　　者：范志华 苗世洪 刘子文 晁凯云 段偲默 FAN Zhihua;MIAO Shihong;LIU Ziwen;CHAO Kaiyun;DUAN Simo(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Hubei Electric Power Security and High Efficiency Key Laboratory,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室电力安全与高效湖北省重点实验室,湖北武汉430074

出　　处：《供用电》2018年第7期20-27,48,共9页Distribution & Utilization

基　　金：国家重点研发计划项目(2017YFB0903601);国家自然科学基金项目(51777088);2018年国家电网公司总部科技项目(SGNXDK00DWJS1800016)~~

摘　　要：含多类型分布式电源的交直流混合微电网系统由交流子网、直流子网与连接交直流母线的双向AC/DC潮流控制器组成。文章分析了交流子网与直流子网的下垂控制特性,提出交流子网与直流微电网中电源下垂系数选取方案,以达到2种类型子网电源根据其容量成比例进行功率分配的目的。提出了一种双向AC/DC潮流控制器控制策略,使整个交直流微电网的电源按其容量成比例的出力供应负荷需求,确保整个微电网不会因单个电源过载而引起故障,同时提高了维持交流频率和直流电压稳定的能力。在PSCAD/EMTDC中的仿真结果验证了所提控制策略有效性。The AC/DC hybrid microgrid including multi-type distributed power supplies consists of AC sub-grids,DC subgrids and bidirectional interlinking converters connected to AC/DC bus.This paper analyzes the droop control characteristics of AC subnetworks and DC subnetworks,and proposes a power supply droop coefficient selection scheme for AC subnetworks and DC microgrids to achieve the purpose of power distribution of two types of subnetwork power supplies in proportion to their capacity.This paper proposes a bidirectional AC/DC power flow controller control strategy to make the power of the entire AC/DC microgrid power supply in proportion to its capacity to supply load demand,so as to ensure that the whole microgrid will not cause failure due to a single power supply overload,and at the same time improve The ability to maintain AC frequency and DC voltage stability.The simulation results in PSCAD/EMTDC validate the effectiveness of the proposed control strategy.

关 键 词：交直流混合微电网 双向AC/DC潮流控制器 功率分配 下垂控制 

分 类 号：TM72[电气工程—电力系统及自动化]