考虑负载均衡的配电台区柔性互联系统大扰动稳定性分析  

Large-disturbance stability analysis for distribution station area flexible interconnected system considering load-balancing

作　　者：宁昕 季宇 邵瑶 于淼[3] 吴鸣 徐旖旎 熊雄 黄鹭鹭 NING Xin;JI Yu;SHAO Yao;YU Miao;WU Ming;XU Yini;XIONG Xiong;HUANG Lulu(State Grid Corporation of China,Beijing 100031,China;State Grid Shanghai Energy Interconnection Research Institute Co.,Ltd.,Shanghai 201213,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]国家电网有限公司,北京100031 [2]国网上海能源互联网研究院有限公司,上海201213 [3]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力自动化设备》2024年第12期3-9,34,共8页Electric Power Automation Equipment

基　　金：国家电网公司总部科技项目(5400-202255160A-1-1-ZN)。

摘　　要：柔性互联系统具有潮流控制灵活、供电可靠性高等优点,已逐渐成为提升配电台区供电水平的解决方案。为应对当前配电台区难以扩容,无法有效利用台区容量等问题,提出了考虑负载均衡的直流电压-交流源功率(vdc-Pgrid)下垂控制策略,使正常运行时各台区交流源出力均衡。将台区等效为受控电流源,建立了系统的简化电路模型。基于混合势函数理论分析了直流母线接入恒功率负载时系统的大扰动稳定性,并得到系统的稳定判据。通过硬件在环实验,验证了所提控制策略的有效性和所得稳定判据的准确性。The flexible interconnected system has the advantages of flexible power flow control and strong power supply reliability,gradually becoming a solution to improve the power supply level of distribution station areas.In order to solve the problems that the current distribution station area is difficult to expand and the capacity of the distribution station area cannot be effectively utilized,a DC voltage-AC source power(vdc-Pgrid) droop control strategy considering load-balancing is proposed to balance the output of the AC source in each distribution station area during normal operation.The distribution station area is equivalent to a controlled current source,a simplified circuit model of the system is established.When the DC bus is connected with a constant power load,the large-disturbance stability of the system is analyzed based on the mixed potential function theory,and the stability criterion of the system is obtained.The effectiveness of the proposed control strategy and the stability criterion are verified through hardware-in-the-loop experiments.

关 键 词：柔性互联系统 负载均衡 恒功率负载 混合势函数 大扰动稳定性 

分 类 号：TM712[电气工程—电力系统及自动化]