现代电子技术2024，Vol.47Issue(20)：81-86,6.DOI:10.16652/j.issn.1004-373x.2024.20.013
一种基于MPPT多级扰动的孤岛检测方法
Method of islanding detection based on MPPT multi-level disturbance
摘要
Abstract
In allusion to the significant impact of traditional active islanding detection methods on power quality and high power loss,a method based on MPPT(maximum power point tracking)multi-level disturbance is proposed to detect islanding state in photovoltaic grid-connected systems,so as to ensure the stable operation of the photovoltaic grid-connected system.This method can reduce the active output power of the inverter by periodically perturbing the duty cycle of the Boost circuit at multiple levels,so that the node voltage is lower than the set minimum threshold in the islanding state,and the influence on it is negligible in the grid-connected state.The disturbance mode of duty cycle is selected according to the voltage at grid-connected point,and the specific disturbance is calculated in real time according to its value,which can effectively reduce the influence on the power grid and electrical equipment and reduce the power dissipation.In the parameter design,the detection quality under harsh working conditions is considered fully,and the blind area of detection is eliminated.The simulation testing of the proposed method is conducted under different conditions.The results show that this method has significant advantages in reducing power dissipation and improving islanding detection efficiency.关键词
孤岛检测/MPPT多级扰动/光伏并网系统/光伏发电/微网/功率损耗Key words
islanding detection/MPPT multi-level disturbance/photovoltaic grid-connected system/photovoltaic power generation/microgrid/power dissipation分类
信息技术与安全科学引用本文复制引用
李学举,武鹏,陈俊伟,陈蓓..一种基于MPPT多级扰动的孤岛检测方法[J].现代电子技术,2024,47(20):81-86,6.基金项目
国家自然科学基金项目:Markov跳跃系统柔性调度与控制优化设计(62173222) （62173222）
