基于虚拟惯性参数可行域的直流微电网高频振荡抑制  

Virtual Inertia Parameter Feasible Region Based High-frequency Oscillation Suppression of DC Microgrid

作　　者：王锐 赵学深[1] 张新慧[1] 彭克[1] 许洪璐 孙浩玥 WANG Rui;ZHAO Xueshen;ZHANG Xinhui;PENG Ke;XU Honglu;SUN Haoyue(School of Electrical&Electronic Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000

出　　处：《中国电力》2024年第10期123-132,共10页Electric Power

基　　金：国家自然科学基金资助项目(51807112);山东省自然科学基金项目(ZR2023ME034)。

摘　　要：针对不合理虚拟惯性控制参数引发的直流微电网高频振荡失稳问题,提出了低通滤波器等效建模方法,建立了直流微电网的降阶模型及其电压闭环传递函数。从保证直流微电网小扰动稳定性角度出发,定义了以下垂系数和低通滤波控制带宽为参数空间的虚拟惯性参数可行域概念。基于电压闭环传递函数得到的零极点,提出了虚拟惯性参数可行域求解方法,该可行域为直流微电网的虚拟惯性控制参数设计提供了切实可行的指导依据。最后,利用PLECS软件搭建了基于开关模型的直流微电网仿真算例,多组仿真结果均验证了降阶模型和虚拟惯性控制参数可行域的有效性。Addressing the issue of high-frequency oscillation instability in DC microgrids caused by unreasonable virtual inertia control parameters,a low-pass filter equivalent modeling approach is proposed.This approach establishes a reduced-order model of the DC microgrid and its voltage closed-loop transfer function.From the perspective of ensuring the small-signal stability of the DC microgrid,the concept of a feasible region for virtual inertia parameters is defined in the parameter space,with droop coefficients and low-pass filter control bandwidth as the primary parameters.Based on the zeros and poles obtained from the voltage closed-loop transfer function,a method for solving the feasible region of virtual inertia parameters is proposed.This feasible region provides practical guidance for the design of virtual inertia control parameters in DC microgrids.Finally,a simulation case of a DC microgrid based on a switching model is built using PLECS software.Multiple simulation results have verified the effectiveness of the reduced-order model and the feasible region of virtual inertia control parameters.This work is supported by National Natural Science Foundation of China(No.51807112)and Natural Science Foundation of Shandong Province(No.ZR2023ME034).

关 键 词：直流微电网 降阶模型 高频振荡 虚拟惯性参数 可行域 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM712