用于微电网无功均衡控制的虚拟阻抗优化方法_朱一昕.pdf

第36 卷 第17 期 中 国 电 机 工 程 学 报 Vol.36 No.17 Sep. 5, 2016 4552 2016 年9 月5 日 Proceedings of the CSEE ©2016 Chin.Soc.for Elec.Eng. DOI ：10.13334/j.0258-8013.pcsee.151294 文章编号：0258-8013 (2016) 17-4552-12 中图分类号：TM 46 用于微电网无功均衡控制的虚拟阻抗优化方法 朱一昕，卓放，王丰，刘宝泉 (西安交通大学电气工程学院，陕西省 西安市 710049) Virtual Impedance Optimization Method for Microgrid Reactive Power Sharing Control ZHU Yixin, ZHUO Fang, WANG Feng, LIU Baoquan (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710047, Shaanxi Province, China) ABSTRACT: Due to mismatched feeder impedances and other 此基础上，构建全局无功均衡误差计算函数并优化，以获得 factors, the conventional droop control method always has 最优控制器参数。该方法实施无需通讯，可在结构复杂的微 reactive power sharing issues. The application of virtual 电网中应用。相比传统虚拟阻抗方法，优化后的虚拟阻抗控 impedance method can reduce reactive power sharing errors. 制具有网络自适应能力，且无功均衡性能更为良好。仿真和 However, conventional virtual impedance methods have not 实验结果均验证了所提方法的有效性。 fully considered the mismatch factors in microgrid network. To 关键词：微电网；下垂控制；误差估算；虚拟阻抗；自适应 improve the reactive power sharing accuracy, a virtual 控制；无功均衡 impedance optimization method based on the minimization of system global reactive power sharing error was proposed. 0 引言 Through the modeling of microgrid network, an estimation 分布式发电(distributed generation，DG) 因其环 method for network reactive power sharing error was derived. 境污染少、能源利用率高、安装地点灵活、输配电 Then, the transmission characteristic of reactive power was analyzed, with an