用于智能电网含电力电子变换器的混合型变压器设计  

Hybrid Transformer Design with Power Electronic Converter for Smart Grid

作　　者：万家伟 陈汉超[1,2] 廖承[1,2] 曹毅[3] WAN Jiawei;CHEN Hanchao;LIAO Cheng;CAO Yi(State Grid Electric Power Research Institute,Nanjing 211106,China;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,China;State Grid Shanghai Municipal Electric Power Company,Shanghai 210000,China)

机构地区：[1]国网电力科学研究院,南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]国网上海市电力公司,上海210000

出　　处：《电源学报》2025年第2期152-160,共9页Journal of Power Supply

基　　金：国网上海市电力公司科技项目(SGJ001819)。

摘　　要：针对现有变压器无法应对高渗透率可再生能源出力强波动性引起的电压骤降/骤升等问题,提出1种基于三桥臂功率变换器的新型混合配电变压器HDT(hybrid distribution transformer)。该方法通过在现有配电变压器的一次侧增加1个串联三桥臂功率变换器来实现。所提新型混合配电变压器具有可降低功率变换器额定功率和增加1个额外电流回路以提升变压器自由度的优点。此外,为进一步提升变压器的电能质量,所提方法综合了电压矢量,可补偿电压骤降/骤升和电网电压谐波对变压器的不利影响,提高了电网的功率因数,提升了配电网的输电效率。最后,讨论了所提混合配电变压器的配置和控制策略等,并通过仿真实验分析,验证了所提方法的有效性和优越性。Aimed at the problems such as voltage sag/surge resulting from strong fluctuations of high-permeability renewable energy,which cannot be dealt with by using the existing transformers,a novel hybrid distribution transformer(HDT)based on a three-bridge arm power converter is proposed.This method is realized by adding a series three-bridge arm power converter to the primary side of the existing distribution transformer.The proposed novel HDT has two advantages,i.e.,it can reduce the rated power of the power converter,and it can improve the transformer’s degree of freedom by adding an additional current loop.In addition,to further improve the power quality of the transformer,the proposed method integrates the voltage vector,which can compensate the adverse effects of voltage sag/surge and grid voltage harmonics on the transformer.Therefore,it improves the power factor of power grid,as well as the transmission efficiency of the distribution network.Finally,the configuration and control strategy for the proposed HDT are discussed,and the effectiveness and superiority of the proposed method are verified by simulation analysis.

关 键 词：配电网 混合变压器 功率因数 智能电网 电压骤降 

分 类 号：TM28[一般工业技术—材料科学与工程]