基于就地量测信息的交直流混合微电网功率协调控制  

Power Coordinated Control of AC/DC Hybrid Microgrid Based on Local Measurement Information

作　　者：李鹏飞 乔海岩 许慧敏 陈灵强 赵伟康 LI Pengfei;QIAO Haiyan;XU Huimin;CHEN Lingqiang;ZHAO Weikang(School of Information and Electrical Engineering,Hebei University of Engineering,Handan 056038,China;Tianjin Key Laboratory of New Energy Power Conversion,Transmission and Intelligent Control(Tianjin University of Technology),Tianjin 300384,China)

机构地区：[1]河北工程大学信息与电气工程学院,河北邯郸056038 [2]天津市新能源电力变换传输与智能控制重点实验室(天津理工大学),天津300384

出　　处：《电力科学与工程》2025年第2期23-30,共8页Electric Power Science and Engineering

基　　金：国家重点研发计划资助项目(2022YFB4200703);河北省高等学校科学技术研究项目(QN2024261);河北工程大学创新基金资助项目(SJ2401002141)。

摘　　要：为解决新能源随机波动、负荷暂态冲击给交直流混合微电网稳定运行造成的问题,提出一种无互联通信下功率自主互支撑方法。互联直流-交流(DC-AC)变换器通过引入频率-直流电压自适应控制,基于就地量测双边交直流子系统频率及直流电压等信息,将交直流子系统有机耦合,通过感知双边频率/直流电压波动自适应调整其互联传输功率,为受扰子系统提供实时功率支援。对交、直流子系统中分布式松弛单元采用下垂控制,以使其能够按照额定容量比合理承担扰动功率,最终实现交直流系统间功率协同互济。仿真实验结果表明,采用所提方法时,仅仅利用就地量测信息即实现了交直流混合微电网全局相互支撑,这大大提升了非计划性暂态冲击下系统的运行稳定性及控制灵活性。To solve the problems caused by random fluctuations of new energy and transient load disturbances on the stable operation of AC/DC hybrid microgrids,a power autonomous mutual support method without interconnected communication is proposed.By introducing frequency-DC voltage adaptive control,the interconnected DC-AC converter organically couples the AC and DC subsystems based on local measurement of bilateral AC and DC subsystem frequencies and DC voltages,and adaptively adjusts its interconnected transmission power by sensing the bilateral frequency/DC voltage fluctuations to provide real-time power support for the disturbed subsystems.The droop control is adopted to the distributed slack units in the AC and DC subsystems,which can enable them to bear the disturbance power according to the rated capacity ratio reasonably,and ultimately achieve power coordination between AC and DC subsystems.The simulation experiment results show that when using the proposed method,the global mutual support can be achieved by only using local measurement information,which greatly improves the system operation stability and control flexibility under unplanned transient disturbance.

关 键 词：交直流微电网 互支撑 分布式松弛单元 稳定性 互联DC-AC 

分 类 号：TM72[电气工程—电力系统及自动化]