氢燃料电池并入微电网的改进虚拟同步机控制  

Improved virtual synchronous generator control for hydrogen fuel cell integration into a microgrid

作　　者：徐靖 赵霞[1] 罗映红[1] XU Jing;ZHAO Xia;LUO Yinghong(College of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070

出　　处：《电力系统保护与控制》2020年第22期165-172,共8页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51767015);甘肃省自然科学基金项目资助(2016GS07210)。

摘　　要：近年来,氢燃料电池等新能源并入微电网得到了人们广泛的关注。提出一种采用虚拟同步机技术的氢燃料电池发电系统。首先建立了氢燃料电池数学模型,分析了其电压输出特性和功率特性。在此基础上设计了两级变换器式并网控制系统。在虚拟同步机控制中,针对功率外环中一阶滤波器低频特性影响系统稳定性和动态性能的问题,在原有滤波器的基础上引入陷波滤波器进行优化补偿。最后,利用Matlab/Simulink进行仿真,对比优化前后滤波效果,并对网侧电压、电流总畸变(THD)进行仿真测试,验证了优化后的滤波器及控制系统的有效性和可行性。In recent years,new energy sources such as the hydrogen fuel cell have attracted considerable attention.This paper presents a hydrogen fuel cell power generation system controlled by a virtual synchronous generator.First,the mathematical model of a hydrogen fuel cell is established,and its voltage output characteristics and power characteristics are analyzed.On this basis,a two-stage converter-type grid connected control system is designed.In the control of a virtual synchronous generator,in order to solve the problem that the low frequency characteristic of the first-order filter in the power outer loop affects the stability and dynamic performance of the system,a notch filter is introduced to optimize the compensation based on the original filter.Finally,Matlab/Simulink is used to simulate and compare the filter effect before and after optimization,and the simulation test of side voltage and THD is carried out.This shows the validity and feasibility of the optimized filter and control system.

关 键 词：虚拟同步机 氢燃料电池 微电网 总谐波畸变率 陷波滤波器 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TM73