变电站高频开关整流模块热备份的实现与应用

由于高频开关整流模块体积小重量轻、效率高噪声低等优点,广泛应用于变电站直流系统充电装置。充电装置通过多个整流模块并联,为蓄电池充电以及直流负载供电。正常运行时,由于充电装置负载率低,无法使各整流模块运行在较高的效率区间。本文分析数字高频开关电源整流模块的原理和结构,针对PLC控制的直流系统,提出了一种整流模块热备份方式。该方式下PLC控制系统实时监测各整流模块状态,根据负荷情况起停模块数。在保证直流系统供电安全可靠前提下可以提高充电装置效率,延长模块使用寿命。现场实际应用表明,该整流模块热备份方式实现了预期目标。

Implementation and Application of High Frequency Switching Rectifier Module Hot Backup in Substation

High frequency switching rectifier module has the advantages of small volume, light weight, high efficiency and low noise, and is widely used in the charging device of the DC system in substation. The charging device of DC system in substation is in parallel, charging for battery and supplying DC load. During the normal operation, the rectifier module can't work at high efficiency range due to the low load rate of the charging device. In this paper, we study and analyze the principle and structure of digital high frequency switching rectifier module. According to the DC system controlled by PLC, a kind of rectifier module hot backup is proposed. In this way, the PLC control system can monitor each rectifier module in real time. The number of start and stop modules can be controlled according to the load conditions. It can improve the efficiency of the charging device and extend module life while ensuring the safety and reliability of the DC system. Through the field application, rectifier module hot backup can achieve the expected goals.