摘要
研究了微网的结构、运行特性和控制策略,基于电能质量的基本要求,分析了微网电压暂降的产生机理以及控制方法。针对电压暂降问题,从传统电力系统中的研究成果出发,考虑在微网中接入动态电压恢复器(DVR)改善电能质量,并采用了基于数学形态学的电压d-q分解检测算法检测电压。在PSCAD/EMTDC中对上述方案进行建模,结合微网模型进行仿真,并对仿真结果进行分析,验证其有效性。
This paper analyzes the structure, the operating characteristics and the control strategy of microgrid. Based on the requirements of power quality and research achievements of the traditional power system, it is considered to introduce the Dynamic Voltage Restorer （DVR） in power distribution system with microgrid to improve the power quality. A method to detect voltage sags is presented, which incorporates morphological low-pass filters with the d-q transformation. A simulation model of the DVR based on PSCAD/EMTDC is proposed. Combining with the microgrid model, the simulation results prove that the topology and control strategy of DVR is correct and effective.
出处
《机电工程技术》
2015年第12期29-32,共4页
Mechanical & Electrical Engineering Technology
