大容量电池储能电网接入系统

电池储能系统能快速、独立地调节有功/无功,在负荷平定、电能质量治理等方面具有很高的应用价值.介绍100kW储能电池模块电网接入系统的设计,为兆瓦级储能系统的研制提供参考.其中并网逆变器的分相瞬时电流控制可保证不同运行条件下装置对交流电流参考值的准确跟踪;电池侧双向DC/DC电路的双闭环控制可保证电池电流灵活可调;提出2种协调控制策略.电磁暂态仿真及装置实验结果证明了该控制策略的有效性.

Power conversion system of large scaled battery energy storage

Battery energy storage system has the potential ability of regulating active and reactive power rapidly and independently.It has great application value in load-leveling,uninterruptable power supply,power quality conditioning,etc.A 100 kW/150 kVA power conversion system for 100 kW battery energy storage module was designed with its main circuit,component parameters and control system.The design was aiming at storage systems with the capacity up to MWs.In the power conversion system,the DC/AC's instantaneous current controller was applied to track the three-phase reference currents separatively in different grid voltage circumstances,and the boost bidirectional DC/DC circuit between batteries and DC bus was controlled by double-loops feedback to regulate battery currents.On that basis,two coordinate control schemes were proposed.Simulations and experimental tests verify the stability and anticipant response of the control system designed above.