What role does the high-frequency switching power supply play in the power industry?

Currently, the DC power supplies used in foreign power systems are gradually shifting from traditional phase-controlled power supplies to modular high-frequency switching power supplies.

Functional Principle of the High-Frequency Switching Power Supply Rectifier

The AC power supply is connected to the rectifier module. After filtering and three-phase full-wave rectification, it is connected to a high-frequency inverter circuit for DC power conversion-converting DC power into high-frequency AC power. Finally, the high-frequency power passes through a transformer, rectifier bridge, and filter, resulting in a stable DC output.

This high-frequency switching power supply mainly consists of a high-frequency switching charging module, a central control unit, and a storage battery bank. Both the charging module and the central control unit are equipped with built-in highly intelligent microprocessors.

The high-frequency switching power supply rectifier module has a built-in microprocessor, which improves equipment management efficiency, simplifies wiring, and enables quick installation and commissioning. On the premise that the DC system error signals are as comprehensive as possible, the module not only directly displays output current, output voltage, and various operating conditions on the control panel but also can communicate with the substation's power system automation network or DC switch monitoring system through monitoring, realizing remote monitoring of the module. This achieves various operations of the module and the "four remote functions" (remote monitoring, remote control, remote adjustment, and remote signaling).

The high-frequency switching power supply rectifier module has an automatic current-sharing function in parallel operation mode. Meanwhile, it is equipped with overcurrent protection, overvoltage protection, instantaneous short-circuit protection, and safe and reliable lightning protection measures, which can effectively withstand the impact of output short circuits. In addition, multiple effective measures are adopted to avoid high-frequency power and harmonic interference on the AC grid side.