基于主从互联变换器交直流混合微电网的电能质量优化控制策略  

Optimization Control Strategy for Power Quality in AC-DC Hybrid Microgrid Based on Master-Slave ILC

作　　者：康钦泽 罗朝旭 刘泽宇 马凡烁 肖锋 KANG Qinze;LUO Zhaoxu;LIU Zeyu;MA Fanshuo;XIAO Feng(School of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412007

出　　处：《湖南电力》2025年第2期74-81,共8页Hunan Electric Power

基　　金：国家自然科学基金资助项目(52207205);湖南省教育厅优秀青年项目(22B0563)。

摘　　要：针对交直流混合微电网中大量非线性负载所引起的电能质量问题,提出一种基于主从互联变换器(interlinking converter,ILC)的电能质量优化控制策略。对多台ILC采用主从控制模式,其中容量较大的ILC被选择作为主ILC,工作在电压控制模式(voltage controlmode,VCM),能充分利用主ILC的剩余容量,大量吸收交流母线的谐波分量,以改善微电网的电能质量;从ILC工作在电流控制模式(current control mode,CCM),在谐波域可等效为较小的虚拟导纳,在辅助主ILC更加有效地治理负序和谐波的同时,也能抑制微电网内可能产生的谐波谐振,维持直流母线电压的稳定,更有效地提高交直流混合微电网的电能质量。最后通过MATLAB仿真试验验证所提策略的正确性和可行性。Aiming at the power quality problem caused by a large number of nonlinear loads in AC-DC hybrid microgrid,an optimal control strategy for power quality based on master-slave interlinking converter(ILC)is proposed,which adopts a master-slave control mode for multiple ILCs.Among them the ILC with a larger capacity is selected to be the master ILC and works in voltage control mode(VCM),which can make full use of the remaining capacity of the master ILC and absorb a large amount ofharmonic components from the AC bus,thus improving the power quality ofthe microgrid.The slave ILC,operating in current control mode(CCM),can be equated to a smaller virtual conductor in the harmonic domain,which can assist the master ILC to manage negative sequence and harmonics more effectively while suppressing the harmonic resonance that may be generated within the microgrid.At the same time,it can also maintain the stability of the DC bus voltage and more effectively improve the power quality of the AC-DC hybrid microgrid.Finally,the correctness and feasibility of the proposed strategy are verified by MATLAB simulation test.

关 键 词：交直流混合微电网 电能质量 互联变换器 谐波抑制 电压稳定 

分 类 号：TM727[电气工程—电力系统及自动化]