微电网孤岛模式下虚拟同步发电机的频率控制研究  

Frequency of Virtual Synchronous Generator in Isolated Microgrid Mode Control Research

作　　者：张春森 陈铁[1] 柯颢云 熊奇 张欣 杨磊[1] 阮建雄 ZHANG Chunsen;CHEN Tie;KE Haoyun;XIONG Qi;ZHANG Xin;YANG Lei;RUAN Jianxiong(Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station,China Three Gorges University,Hubei Yichang 443002,China;Huangshi Power Supply Company of State Grid Hubei Electric Power Co.,Ltd.,Hubei Huangshi 435000,China)

机构地区：[1]三峡大学水电站运行与控制湖北省重点实验室,湖北宜昌443002 [2]国网湖北省电力有限公司黄石供电公司,湖北黄石435000

出　　处：《电工材料》2020年第2期21-25,共5页Electrical Engineering Materials

基　　金：湖北省技术创新重大专项(2017AAA132)。

摘　　要：在微电网孤岛运行方式下采用传统虚拟同步发电机的控制方式,仅具有一次调频的功能;利用虚拟同步发电机控制参数灵活的特点,提出了一种改变下垂控制系数的二次调频策略,该策略利用频率和负荷变化量即可整定出新的下垂控制系数;虚拟同步发电机可根据负荷变化过程中频率是否超过其限定值,在一次调频控制和二次调频控制间灵活的切换,实现了微电网支撑频率的目的,提高了微电网抵御负荷变化的能力。最后通过MATLAB/Simulink仿真实验平台搭建了微电网的孤岛运行模型,验证了微电网孤岛模式下频率控制策略的正确性和有效性。The traditional virtual synchronous generator has only one frequency modulation function under islanded operation mode of microgrid.Based on the flexible control parameters of virtual synchronous generator,a second frequency modulation strategy is proposed to change the droop control coefficient,which can adjust the new droop by using the frequency and load variation.Virtual synchronous generator can flexibly switch between primary frequency modulation control and secondary frequency modulation control according to whether the frequency exceeds its limit value in the process of load change,which achieves the purpose of micro-grid support frequency and improves the ability of micro-grid to resist load change.Finally,the islanding operation model of the microgrid is built through the MATLAB/Simulink simulation experiment platform,which verifies the correctness and effectiveness of the frequency control strategy in the islanding mode of the microgrid.

关 键 词：微电网 虚拟同步发电机 一次调频 改变下垂控制系数 

分 类 号：TM732[电气工程—电力系统及自动化]