混合微电网多互联变换器并联的环流抑制策略  

Circulating Current Suppression Strategy for Parallel Multi-interlinking Converters in Hybrid Microgrid

作　　者：史德生 卞秋野 SHI De-sheng;BIAN Qiu-ye(State Grid Ljin Power Supply Company,Dongying 257400,China)

机构地区：[1]国网利津县供电公司,山东东营257400

出　　处：《电力电子技术》2022年第6期74-77,共4页Power Electronics

摘　　要：针对交、直流混合微电网中多个互联变换器(IC)并联的环流抑制问题,提出一种交、直流微电网的功率平衡及接口变换器之间的功率均流策略,提高功率传输效率。主要借鉴交流小信号注入法思想,建立直流微电网的频率-功率下垂特性,在此基础上设计功率自主控制环节,实现交、直流微电网有功功率的自主平衡。基于功率自主控制环节所得功率参考值设计功率均流控制环节,实现接口变换器之间流动功率按比例均分。最后通过实验验证了所提控制策略的可行性。Aiming at the circulating current suppression problem of parallel multi-interlinking converters(IC) in the AC/DC hybrid microgrid,a power balancing and power equalization strategy between AC/DC microgrids and interlinking converters is proposed to improve the power transfer efficiency.It mainly draws on the idea of AC small signal injection method to establish the frequency-power sag characteristics of DC microgrid,based on which the power autonomous control link is designed to realize the active power autonomous balancing of AC and DC microgrids.The power equalization control link is designed based on the power reference value obtained from the power autonomous control link to realize the proportional equalization of flowing power between interlinking converters.Finally,the feasibility of the proposed control strategy is verified through experiments.

关 键 词：互联变换器 混合微电网 小信号注入法 

分 类 号：TM46[电气工程—电器]