文献类型：期刊文献

中文题名：基于改进下垂控制的主从微电网无差调频策略

英文题名：No-deviation frequency regulation strategy of master-slavemicrogrid based on improved droop control

作者：高佳 肖迎群

第一作者：高佳

机构：[1]贵州大学电气工程学院;[2]贵州理工学院大数据学院

第一机构：贵州大学电气工程学院,贵州贵阳550025

年份：2018

卷号：34

期号：10

起止页码：8-14

中文期刊名：电力科学与工程

外文期刊名：Electric Power Science and Engineering

基金：国家自然科学基金(61540051)

语种：中文

中文关键词：微电网;频率调整;改进下垂控制;分布式电源;主从控制

外文关键词：microgrid;frequency regulation;improved droop control;distributed generation;master-slave control

摘要：传统下垂控制参考了主网发电机的一次频率调整,在逆变器控制策略中人为地加入了有功—频率下垂曲线,负荷波动时,逆变器工作点会根据下垂曲线转移到新的工作点,当系统达到稳定时,频率会出现静态误差。针对传统下垂方法的不足,在有功功率反馈前加入了PI控制环节,在扰动发生后的动态过程中,调整逆变器有功功率的输出,当逆变器输出功率与负载功率达到平衡时,频率恢复到额定值,消除了静态误差。在MATLAB/SIMULINK中搭建了微电网模型,将改进后的下垂控制作为主源控制方式,其他分布式电源(DG)仍采用PQ控制,分析了微电网运行中的功率和频率变化,验证了主源采用改进下垂控制能够实现微电网的无差调频。
In this paper, referring to the primary frequency regulation of large grid generator, the traditional droop control added the active-frequency sag curve in the inverter control strategy, and when the load fluctuates, the working point of the inverter will be transferred to the new working point according to the sag curve. When the system achieves stability, there will be static deviation in frequency. To solve the shortcomings of the traditional droop method, the PI control is added before the active power feedback. In the dynamic process after the disturbance occurs, the active power output of the inverter is adjusted. When the output power of the inverter is balanced with the load power, the frequency will be restored to the nominal value. In such way, the static deviation is eliminated. The micro grid model is built in matlab/simulink, and the main distributed generation（DG） adopts the improved droop control method. The PQ control is still adopted for other distributed generation（DG）. During the operation of micro-grid, the power change and frequency change are analyzed. It is proved that the improved droop control can realize the no-deviation frequency regulation for micro-grids.