基于模糊控制器的孤岛微网低频减载策略研究  

Study on Underfrequency Load Shedding Strategy for Islanded Microgrid Based on Fuzzy Controller

作　　者：葛宜然 葛愿[1] 黄超[1] 

机构地区：[1]安徽工程大学电气工程学院,安徽芜湖241000

出　　处：《安徽工程大学学报》2016年第5期80-84,共5页Journal of Anhui Polytechnic University

基　　金：芜湖市科技计划重点基金资助项目(2014CXY05)

摘　　要：在微网孤岛模式下,由于分布式电源发电量和负载之间的不平衡,导致系统频率的变化过大,从而无法满足电能质量要求.提出一种基于模糊逻辑控制器的孤岛模式下微网低频减载策略,该控制策略包含模糊逻辑控制器和负载控制器,以频率f和频率变化率df/dt作为输入,通过模糊控制器来预算需要切断的负荷量△P,再由负载控制器完成对负载的切断.基于Matlab/Simulink建立了光伏微网仿真模型,仿真实验验证了所提低频减载策略的有效性.In islanded mode of microgrid, due to the imbalance between distributed generators and loads, the change of system frequency is too large,to meet the requirements of power quality.This paper presents an underfrequency load shedding（UFLS） strategy in islanded mode of microgrid based on fuzzy logic controller. The control strategy includes a load controller and a fuzzy logic controller. With the input of frequency f and rate of change of frequency df/dt ,the fuzzy logic controller budgets the load capacity ΔP to be cut off.Then,the load will be cut off by the load controller.A photovoltaic microgrid model is set up with Matlab/simulink, and the result of simulation experiment verifies the effectiveness of the proposed under-frequency load shedding strategy.

关 键 词：微网 孤岛模式 模糊逻辑控制器 频率控制 低频减载 

分 类 号：TM761.2[电气工程—电力系统及自动化]