计及不可调度DG的孤岛串级交流微电网功率控制方法  

Power Control Method for Island Cascaded AC Microgrid Including Non-dispatchable DG

作　　者：王一妹 李俊领 曾杰 许中平 WANG Yimei;LI Junling;ZENG Jie;XU Zhongping(College of Information and Communication,Zhengzhou Electric Power College,Zhengzhou 450000,China;State Grid Xizang Electric Power Co.,Ltd,Lhasa 850000,China)

机构地区：[1]郑州电力高等专科学校信息通信学院,郑州450000 [2]国网西藏电力有限公司,拉萨850000

出　　处：《电源学报》2024年第3期298-306,共9页Journal of Power Supply

基　　金：国家自然科学基金面上资助项目(51977143)。

摘　　要：针对由可调度和不可调度分布式电源DG(distributed generation)组成的串级孤岛微电网MGs(microgrids)功率控制机理复杂、电压和频率调节难度大等问题,提出了一种新型分散主从功率分配控制方法,以实现含二类DG串级孤岛微电网的电压、频率调节以及功率分配。该方法分别设计了主DG和从DG的控制方法,其中,主DG负责调节微电网的频率和电压,从属DG的MPPT可在一定母线电压下运行,其可最大限度地利用不可调度DG的输出功率,在轻负荷条件下可采用自动功率削减,并有效保障系统的安全稳定性。最后,通过仿真和实验验证了所提方法的有效性。The power control mechanism of cascaded island microgrids(MGs)composed of dispatchable and non-dispatchable distributed generations(DGs)is complex,and the voltage and frequency regulation is difficult.Aimed at these problems,a novel decentralized master-slave power distribution control method is proposed in this paper to realize the voltage and frequency regulation and power distribution of the cascaded island MGs including second-class DGs.The control methods for master and slave DGs are designed,respectively.The master DG is responsible for adjusting the frequency and voltage of MG.Meanwhile,the slave DGs in MPPT mode can run under certain bus voltage,which can maximally use the output power from non-dispatchable DGs and perform automatic power reduction under the light load condition,thereby effectively guaranteeing the safety and stability of the system.Finally,the effectiveness of the proposed method is verified by simulation and experimental results.

关 键 词：分散控制 不可调度单元 功率削减 串级微电网 

分 类 号：TM73[电气工程—电力系统及自动化]