分布式配电网多端口能量路由器协同控制方法

Cooperative Control Method of Multi-port Energy Router in Distributed Distribution Network

提出了分布式配电网多端口能量路由器协同控制方法,实现了在功率均衡与母线电压平稳的前提下无缝切换多端口能量路由器各工作模式,保障配电网运行的安全稳定。该方法选取包含并网接口、蓄电池接口、负载接口以及光伏接口的四端口能量路由器拓扑结构作为协同控制对象,结合分布式与集中式控制设计分层协同控制方法,实现对蓄电池充、放电的均流稳压控制,以及工作模式切换时的直流母线电压平稳与功率均衡控制,达到无缝切换各工作模式、实现各工作模式协同运行的目的。结果表明,在该方法的控制下,多端口能量路由器中储能蓄电池可实现恒流充电中两相电路充电电流的均衡,保持恒压充、放电过程中蓄电池电流、电压、恒压放电过程中母线电压的稳定,能量路由器可实现多工作模式切换过程中功率的均衡及直流母线电压的稳定,为分布式配电网平稳安全运行提供保障。

A cooperative control method for multi-port energy routers in distributed distribution networks was proposed.Under the premise of power balance and bus voltage stability,seamless switching of various working modes of multi-port energy routers was realized to ensure the security and stability of distribution network operation.In this method,the four-port energy router topology including grid connection interface,battery interface,load interface and photovoltaic interface was selected as the cooperative control object,distributed and centralized control was used to design a hierarchical cooperative control method to realize the current sharing and voltage stabilization control of battery charging and discharging,and the DC bus voltage stability and power balance control during the switching of working modes,so as to seamlessly switch various working modes,realize the purpose of cooperative operation of various working modes.The results show that under the control of this method,the energy storage battery in the multi-port energy router can achieve the balance of the charging current of the two-phase circuit in the constant current charging process,and maintain the stability of the battery current and voltage in the constant voltage charging and discharging process,and maintain the stability of the bus voltage in the constant voltage discharging process.In the process of switching multiple working modes,the energy router can realize the balance of power and the stability of DC bus voltage,thus providing guarantee for the stable and safe operation of the distributed distribution network.