基于DC-DC变换的变电站直流电源设计

在电力系统中后备电源是变电站直流系统的核心。本文针对后备电源的可靠性进行了探讨,提出了双重Boost升压变换器法。为了防止直流电源模块并联运行时产生的环流和电流不均衡现象,本文采用中间电流均流控制法的方案,使升压后的电源模块实现并联互备。使用MATLAB/simulink仿真软件搭建了相应的仿真模型,最后通过仿真分析得出：双重Boost升压法不仅是一种有效的升压方法而且还可以减小电路中功率元件的电流应力。中间电流均流控制法可以实现稳态的均流控制,保证电源模块在出现故障的情况下可以进行不断电互备替换。

The design of substatoin DC power source based on the DC/DC Converters method

The back-up power is the core of the substation DC system in power system.Based on the reliability of the back-up power, the method of double Boost the Boost converter is proposed in this paper.To prevent the DC power supply module parallel running when the circulation and current uneven phenomenon, the intermediate current-sharing method is adopted that the booster power supply module in parallel is achieved.The corresponding simulation model is established through the MATLAB/simulink simulation software. From the corresponding simulation we can achieve that the double Boost booster method is both a kind of effective method of booster and an effective method to reduce the power components of current stress in the circuit.The intermediate current-sharing method can realize the steady state flow control and ensure the power supply module can be continuously electricity for replacement in the case of malfunctions.