级联电池储能系统控制电源方案及其可靠性

Control Power Supply Scheme and Reliability of Cascade Battery Energy Storage System

级联电池储能系统的各个模块的工作需要独立的、相互隔离的控制电源。控制电源的可靠性对整个级联电池储能系统的可靠性至关重要。总结了多种模块控制电源及其冗余设计方案,针对有冗余和无冗余两种情况,建立了控制电源系统的可靠性模型。分析表明:无冗余的电源方案中,工频变压器隔离取电是优选的控制电源取电方式。有冗余的电源方案中,工频变压器隔离取电和直流侧取电组合的可靠性最优。可为级联电池储能及类似的模块化拓扑电力电子装置的控制电源设计提供指导。

The operation of each module of the cascaded battery energy storage system requires independent and isolated control power supplies.The reliability of the control power supply is crucial to the reliability of the entire cascaded battery energy storage system.A variety of modular control power supplies and their redundant design schemes were summarized,and the reliability model of the control power supply system was established for both redundant and non-redundant situations.The analysis shows that:in the power supply scheme without redundancy,the isolated power supplying of power frequency transformer is the preferred way to control power supplying.In the redundant power supply scheme,the reliability of the combination of isolated power supplying from power frequency transformer and power supplying from DC side is the best.It can provide guidance for the control power supply design of cascaded battery energy storage and similar modular topology power electronic devices.