基于智能负载的微电网精准切负荷控制策略

Load-shedding control strategy of microgrid based on smart loads

随着分布式发电(DG)的大量接入,微电网的安全稳定运行正面临较大的考验,精准切负荷控制策略的重要性愈发突出。为了最小化过切量,提升负荷控制的经济性,需对微电网精准切负荷的控制策略进行改进。首先,介绍了智能负载原理,通过调节电力弹簧(ES)电压的大小实现智能负载功率的动态变化;然后分析了应用权重法与轮次法的传统精准切负荷控制策略,在此基础上提出了一种基于智能负载的精准切负荷控制策略,通过负荷的动态响应实现最小化过切量,并将其应用于权重法与轮次法;最后,算例分析表明,所述方法可有效降低系统过切量,提升负荷控制的经济性。

With the larger and larger amounts of distributed generation,the safe and stable operation of microgrid is being greatly tested,the importance of precise load-shedding control strategy is becoming more and more prominent.In order to minimize the overcutting value,and to improve the economy of load control,the control strategy of precise load-shedding in microgrid needs to be improved.At first,the principle of smart load is introduced and the dynamic change of power of intelligent load is realized by adjusting the voltage of electric spring(ES).Then,the traditional precise load-shedding control strategy of applying weight method and round method is analyzed,and a precise load-shedding control strategy based on smart loads is proposed to minimize the overcutting value through the dynamic response of the load,and apply it to the weight method and the round method.At last,the cases analysis indicate that,the proposed strategy can reduce the system overcutting value effectively,and enhance the economy of load control.