摘要
当微电网运行在孤岛状态时,传统下垂控制由于受线路参数不匹配因素影响,难以按照下垂系数对无功功率进行合理分配.为了提高孤网微电网运行品质,提出了一种基于SOGI-FLL技术的改进下垂控制策略.在传统下垂控制的基础上引入了SOGI-FLL(二阶广义积分)环节和电压补偿环节,利用SOGI-FLL能够对输入信号进行快速实时跟踪的特点实现线路参数识别环节,利用线路参数对无功分配的影响加入电压补偿环节,从而达到无功功率的合理分配且不会造成公共点PCC端电压越限.Matlab/Simulink仿真验证了有效性和准确性.
When the micro-grid is running in isolated state,the traditional droop control is difficult to distribute reactive power according to the droop coefficient because of the influence of line parameter mismatch.In order to improve the operation quality of isolated microgrid,an improved droop control strategy based on SOGI-FLL technology was proposed.Based on the traditional droop control,the SOGI-FLL (second-order generalized integral) and voltage compensation are introduced in this method.The line parameter identification is realized by using the characteristics of SOGI-FLL which can track the input signal quickly and real-time,and the voltage compensation is added to the reactive power distribution by utilizing the influence of line parameters.The reasonable distribution of power and power will not cause the PCC terminal voltage limit of common points.MATLAB/Simulink simulation verifies the effectiveness and accuracy of the method.
作者
周文琦
戴武昌
赵冠雄
Zhou Wenqi;Dai Wuchang;Zhao Guanxiong(Electrical Engineering College,Northeast Electrical Power University,Jilin Jilin 132012)
出处
《东北电力大学学报》
2019年第2期22-29,共8页
Journal of Northeast Electric Power University
基金
国家自然科学基金项目(51877034)
