改进的低压微电网孤岛模式下的控制策略  

Improved control strategy of low-voltage micro-grid under island mode

作　　者：董晨露 杨盼盼[1] 王洋[1] 

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《电测与仪表》2015年第11期69-73,共5页Electrical Measurement & Instrumentation

摘　　要：孤岛模式下的低压微电网运行时,如果负载发生变化,传统的下垂控制策略不能有效的控制系统的电压和频率,维持微电网的稳定性。为了解决上述问题,在传统的下垂控制基础上提出了一种改进的自动调整的下垂控制策略,引入了PI前馈控制,通过改变下垂曲线的斜率以及对曲线进行平移,对电压和频率进行调整。首先对该控制策略的原理和方法进行分析,然后在SIMULINK平台下,对传统的和改进的下垂控制策略进行了仿真和分析。仿真结果表明,提出的改进的下垂控制策略可以更有效更快速的控制低压微电网的电压和频率,使其在孤岛模式下的运行更加稳定。When low-voltage micro-grid is under island mode, the traditional droop control can not effectively control the voltage, frequency and stability of system when the load changes. An improved self-regulating droop control strate- gy based on the conventional droop control is proposed in order to solve the above problems. The PI feedforward con- trol is introduced, and the voltage and frequency are adjusted by changing the slope of the droop curve and translation of the curve. First of all, the principles and methods of the control strategy are analyzed, then the traditional droop control strategy and improved control strategy are simulated and analyzed through Simulink platform. The simulation results show that the and rapidly, so that proposed improved droop control strategy can control the voltage and frequency more effectively the low-voltage micro-grid running more stably in island mode.

关 键 词：低压微网 孤岛模式 下垂控制 

分 类 号：TM727[电气工程—电力系统及自动化]