摘要
随着能源需求的增大,新能源发电技术飞速增长。直流微网因为控制简单等优点在新能源发电系统中广泛应用。因为风光能源的波动性较强、稳定性弱,稳定性成为直流微网控制的主要目标。储能系统的加入可以抑制光伏输出功率的波动和维持母线电压的稳定,解决了新能源不能持续供电的问题。为了储能系统的充分利用,提出了基于储能单元剩余容量的改进下垂控制策略。改进的下垂有效实现各储能变换器的功率分配,防止了储能蓄电池的过充过放。并能够充分利用储能的系统容量,提升功率平衡持久性。提出的下垂控制没有固定的下垂系数,动态分配了各储能单元输出功率,并建立了仿真控制模型,从理论上验证了系统稳定性。
In order to make full use of the energy storage system,an improved droop control strategy based on the remaining capacity of the energy storage unit is proposed in this paper.The improved droop coefficient is inversely proportional to the nth power of the SOC of the energy storage unit,effectively realizing the power distribution of each energy storage converter,and preventing the overcharge and over discharge of the energy storage battery,and can make full use of the energy storage system capacity to improve the durability of power balance.Compared with the traditional droop control,the droop control proposed in this paper does not have a fixed droop coefficient,dynamically allocates the output power of each energy storage unit,and establishes a control model to verify stability.
出处
《工业控制计算机》
2020年第10期134-136,共3页
Industrial Control Computer
关键词
储能系统
下垂控制
功率分配
energy storage
droop control
power sharing
