一种改进的电子电力变压器并联控制技术  

An Improved Control Strategy for Parallel Operation of Electronic Power Transformers

作　　者：石赛美[1] 刘宪林[2] 王晓芳[1] 李海娜[1] SHI Saimei;LIU Xianlin;WANG Xiaofang;LI Haina(School of Electrical Engineering,Shaoyang University,Shaoyang 422000 ,China;School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001 , China)

机构地区：[1]邵阳学院电气工程学院,湖南邵阳422000 [2]郑州大学电气工程学院,河南郑州450001

出　　处：《邵阳学院学报（自然科学版）》2018年第2期40-45,共6页Journal of Shaoyang University：Natural Science Edition

摘　　要：电子电力变压器的并联运行是当前微电网运行稳定性的关键问题,针对当前典型的基于调差特性方程的电子电力变压器并联技术的均流效果精度低和动态响应差的问题,在传统功率下垂控制技术的基础上,通过增加瞬时电压基准补偿环节和输出阻抗参数调节环节的多环控制方式。提高了系统的动态均流能力以及参数不一致的调节能力。利用Matlab/Simulink仿真软件结合2台电子电力变压器并联构建了相关仿真模块,从仿真结果可以看出该控制方案具备可行性及良好的动态特性。The parallel operation of the electronic power transformer is the key problem of the operation stability of the current micro-grid.The typical control strategy based on adjusting characteristics will lead to low accuracy of power sharing and the poor dynamic response problem. On the basis of adjusting characteristics of active power and inactive power,a multiple-loop control strategy with the instantaneous voltage reference adjustment loop and variable output impedance adjustment loop was developed.The proposed controller improved the transient performance and the ability of adjusting different parameters. A simulation model with two parallel electronic power transformers was built by Matlab/Simulink. Simulation results confirm the feasibility and good dynamic characteristics of the proposed control strategy.

关 键 词：电子电力变压器 并联运行 多环控制 MATLAB/SIMULINK 

分 类 号：TM41[电气工程—电器] TM76