摘要
本文针对基于下垂控制的直流微电网的稳定性问题,搭建了包括AC/DC整流器和DC/DC变流器及其控制系统的直流微电网系统模型,并在此基础上对直流微电网进行了小扰动稳定性分析,得出了在采取不同下垂系数时的系统特征值。算例结果表明,在设置合理的控制器参数和滤波器参数的前提下,直流微电网在下垂系数较大时仍能保持稳定。为进一步验证分析方法的有效性,对所研究的直流微电网进行了时域仿真,仿真结果验证了小扰动稳定性分析的正确性。
In this paper, for the study of voltage stability of DC micro-grid under droop control, build a DC micro-grid simulation model includes AC/DC rectifier and DC/DC converter, based on which the small signal stability of DC micro-grid is analyzed to obtain the eigenvalues of system when different droop factor is taken. Numerical results show that DC micro-grid which sets reasonable controller parameters and filter parameters remains stable when takes a larger droop factor. To further verify the validity of analytical methods, the time-domain simulation test based on DC micro-grid was implemented to demonstrate the correctness of the small signal stability analysis.
出处
《电气技术》
2015年第7期20-26,共7页
Electrical Engineering
