航天器大功率直流电源数字均流方法

Digital Current Sharing Method For High-power DC Power Supply of Spacecraft

摘要:

针对航天器大功率直流电源系统电源模块的均流问题,提出了直流电源系统数字均流方法。该方法以供配电主控软件为均流核心,将各直流电源模块进行并联输出,通过以太网与各直流电源模块进行数据交互,采集各直流电源输出电流,通过均流算法调节直流电源输出电压,以达到电源均流的目的,此方法在现有直流电源的基础上,设计了大功率直流电源并联硬件电路,包含输入控制单元、远端补偿电路和输出控制单元,软件上设计供配电主控软件,包含均流控制功能、供配电流程功能和电源模块监控功能。通过实际硬件环境试验表明,该方法均流精度高、响应速度快、故障控制能力强,在航天电源领域具备较高的实用价值。

Abstract:

A digital current sharing method for DC power supply systems is proposed to address the current sharing problem of power modules in spacecraft high-power DC power supply systems. This method uses the power supply main control software as the current sharing core, and outputs each DC power module in parallel. It interacts with each DC power module through Ethernet to collect the output current of each DC power supply, and adjusts the output voltage of the DC power supply through the current sharing algorithm to achieve the goal of current sharing. This method is based on the existing DC power supply and designs a high-power DC power supply parallel hardware circuit, which includes input control unit, remote compensation circuit, and output control unit. On the software side, a power supply and distribution main control software is designed, including current sharing control function, power supply and distribution process function, and power module monitoring function.Through actual hardware environment experiments, it has been shown that this method has high current sharing accuracy, fast response speed, and strong fault control ability, and has high practical value in the field of aerospace power supply.