摘要
围绕不同独立微电网之间的互联运行控制问题,采用基于双向AC/DC变流器的柔性互联方法连接独立微电网。每个微电网与相连的变流器交流侧单独构成一个控制区域,区域内部网络采用支路潮流模型,集中优化光伏单元、储能系统和柴油发电机组等设备;相邻区域交互区域边界有功功率,采用基于交替方向乘子法的分布式优化算法协调控制不同微电网内的资源。正常工作条件下,通过柔性互联装置可实现各微电网内设备的协调互补,提高系统运行经济性;设备故障条件下,基于柔性互联装置的灵活控制和功率支撑能力,可减小故障微电网的停电范围。最后用仿真案例验证了不同运行工况下上述方法的有效性。
In this paper,a flexible interconnection method based on bidirectional AC/DC converter is proposed to connect independent microgrids to deal with interconnection operation control problem between different independent microgrids.Each microgrid and the AC side of the connected converter constitute an independent control area.A branch flow model is proposed in intra-area network to centrally optimize photovoltaic unit,energy storage system and diesel engine generator.The active powers at area boundary are interacted with each other,and computations with distributed optimization algorithm are carried out in the interconnected areas based on alternating direction multiplier method(ADMM)to coordinate the control resources in different microgrids.The operational economy can be enhanced by utilizing the complementary characteristics of microgrids via flexible interconnection control under normal operation conditions.While under the situation of equipment failure,the blackout range of the faulty microgrid can be reduced through flexible control and power support capability of the flexible interconnection device.Finally,effectiveness of the proposed method is verified with simulation cases under different operation conditions.
作者
路畅
郭力
刘一欣
高爽
徐斌
LU Chang;GUO Li;LIU Yixin;GAO Shuang;XU Bin(Key Laboratory for Smart Grid of the Ministry of Education(Tianjin University),Nankai District,Tianjin 300072,China;State Grid Anhui Electric Power Company,Hefei 230061,Anhui Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2019年第5期1512-1519,共8页
Power System Technology
基金
国家重点研发计划资助项目(2016YFB0900400)~~
关键词
柔性互联
独立微电网
分布式优化
交替方向乘子法
flexible interconnection
independent microgrids
distributed optimization
alternative direction multiplier method
