基于基波分析方法的绕组电流谐波计算研究  

Calculation of Winding Current Harmonics Based on Fundamental Wave Analysis Method

作　　者：姚生奎 陈明 李成[1] 梁旭 YAO Shengkui;CHEN Ming;LI Cheng;LIANG Xu(Hubei Key Laboratory of Cascaded Hydropower Stations Operation&Control,China Three Gorges University,Yichang 443002,China;State Grid Xi’an Electric Power Supply Company,Xi’an 710032,China;DC Operation Maintenance Company of State Grid Hubei Electric Power Co.Ltd.,Yichang 443000,China)

机构地区：[1]三峡大学梯级水电站运行与控制湖北省重点实验室,湖北宜昌443002 [2]国网西安供电公司,陕西西安710032 [3]国网湖北省电力有限公司直流运检公司,湖北宜昌443000

出　　处：《智慧电力》2021年第8期91-97,共7页Smart Power

基　　金：国家自然科学基金资助项目(61876097)。

摘　　要：三相双有源桥DC-DC变换器的固有软开关能力、滤波电容器电流低等特点而广泛应用于直流配电网。基于三相双向有源桥DC-DC变换器的拓扑结构,分析了不同联接方式下的高频三相变压器的电压电流波形。基于变压器在三种不同联接方式下的近似等效电路模型和电压与电流之间的相量图,采用基波分析方法推导了高频三相变压器绕组电流的各阶次谐波计算表达式,结合各阶次谐波频率下的交流电阻系数表达式,进而实现绕组高频损耗的计算。最后,将解析计算结果与仿真结果进行对比,结果表明各阶次谐波电流幅值、绕组总损耗值与解析计算方法的最大误差为8.4%,验证了解析计算方法的正确性。The three-phase dual active bridge DC-DC converter is widely used in DC distribution network due to its inherent soft switching capability and low filter capacitor current.Based on the topological structure of three-phase dual-active-bridge DC-DC converter,the voltage and current waveform of high-frequency three-phase transformers are analyzed in different winding configurations,and the equivalent circuit model and the phasor diagram of transformers are established under three different winding configurations.The fundamental wave analysis method is used to derive the calculation expressions of the each order harmonic current of the high-frequency three-phase transformer winding current.Combined with the expression of AC resistance coefficient at each harmonic frequency,the calculation of winding high-frequency loss is realized.Finally,the analytical calculation results are compared with the simulation values of the harmonic current spectrum and winding loss value,the results show that the maximum deviation is 8.4%,which verifies the correctness of the analytical calculation method.

关 键 词：三相双有源桥 基波分析方法 谐波计算表达式 绕组损耗 

分 类 号：TM421[电气工程—电器]