摘要
针对含分布式电源(Distributed Generation,DG)的电网电压和无功问题,提出了利用多端口固态变压器对含有分布式电源和储能系统的无功电压控制策略.首先给出了AC-AC型变换的固态变压器的一般模型,并分析了多端口固态变压器在含有分布式电源的电网中的作用;其次分析了四有源桥的结构和等效电路,给出了端口有功和无功双向流动的计算式.根据本文含DG的配网结构,对多端口固态变压器进行无功电压控制的策略展开分析,最后利用IEEE14节点对本文提出的控制策略进行验证,结果表明:多端口固态变压器可以起到稳定电压的作用.
In terms of the voltage and VAR control of the system including distributed generations,a voltVAR control strategy for the network including distributed generations by means of the multi-port solid state transformer was proposed.First the model of solid state transformer in AC-AC conversion was built,and the application of it in the distribution network was analyzed.Then the structure and equivalent circuit of quad-active bridge was given,and the active and reactive power flow in the port were calculated.According to the structure of distributed network,the strategy,that of the multi-port solid state transformer as an effective tool to support grid voltage at distribution level while integrating distributed energy resources,was proposed.Finally,the control strategy that of using the IEEE 14 bus was verified.The simulation results showed that the effectiveness of the multi-port solid state transformer supporting the distribution system at local level in a fast and efficient manner in response to disturbances caused by load variations.
作者
戴润东
王彬
马博翔
刘润西
王超
Dai Rundong;Wang Bin;Ma Boxiang;Liu Runxi;Wang Chao(State Grid Beijing Electric Maintenance Company,Beijing 100069,China;State Grid Corporation Beijing Urban Power Supply Company,Beijing 100034,China;Xiaoxiang College of Hunan University of Science and Technology,Xiangtan 411201,China;Beijing Electric Power ECO INST,Beijing 100055,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2018年第4期56-61,共6页
Journal of Hunan University of Science And Technology：Natural Science Edition
关键词
含分布式电源电网
无功电压控制
多端口固态变压器
四有源桥
power network including distributed generation
volt-VAR control
multi-port solid state transformer
quad-active bridge
