摘要
为了更好地提高直流微网系统运行性能,提出一种能够平衡各储能单元剩余电量(state of charge,SOC)的改进下垂控制策略。该方法在传统下垂控制基础上,以关联SOC参数的指数函数作为自适应下垂系数,根据各储能单元SOC改变其输出能力,实现各储能单元能量均衡。为解决传统下垂控制带来的母线电压偏移问题,加入母线电压二次控制环节,有效抑制直流母线电压偏差,满足负荷运行要求,并通过Matlab/Simulink仿真验证了该策略的有效性。
In order to better improve the operating performance of the DC microgrid system. an improved droop control strategy capable of balancing the state of charge(SOC)of each energy storage unit is proposed. On the basis of the traditional droop control,this method uses the exponential function associated with SOC parameters as the adaptive droop coefficient,and changes its output capabilities according to the SOC of each energy storage unit and achieves energy balance of each energy storage unit. To address the bus voltage offset caused by the traditional droop control,the secondary control of bus voltage is added to effectively suppress the DC bus voltage deviation and meet the load operation requirements.The effectiveness of the strategy is verified by the matlab/simulink simulation.
作者
蒋勃
邹彬
张欣宜
郝伟
杨文宇
王建渊
邓亚平
张源
JIANG Bo;ZOU Bin;ZHANG Xinyi;HAO Wei;YANG Wenyu;WANG Jianyuan;DENG Yaping;ZHANG Yuan(State Grid Shaanxi Electric Power Company,Xi’an 710032,Shaanxi,China;State Grid Xi’an Power Supply Company,Xi’an 710032,Shaanxi,China;State Grid Shaanxi Electric Power Corporation Training Centre,Xi’an 710048,Shaanxi,China;School of Electrical Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China)
出处
《电网与清洁能源》
北大核心
2021年第1期84-89,共6页
Power System and Clean Energy
基金
陕西省自然科学基础研究计划项目(2019JQ-329)。
关键词
直流微网
下垂控制
能量均衡
协调控制
DC microgrid
droop control
energy balance
coordinated control
