A DC power supply is a device that maintains a constant current in a circuit. Such as dry batteries, accumulators, DC generators, etc.
Scope of application of DC power supply:
The DC power system is suitable for large power plants, hydropower plants, ultra-high voltage substations, unattended substations as control, signal, protection, automatic reclosing operation, emergency lighting, DC oil pump;
The opening and closing of various DC operating mechanisms, the instrumentation of the secondary circuit, the control of the automation device, the AC uninterruptible power supply and other DC power supply for electrical devices.
The single-wire principle of DC power supply:
The DC power supply consists of four units: charging screen, feeder screen, battery and DC voltage converter.
The charger screen is composed of several power modules and a microcomputer monitoring system. The maximum configuration of a single cabinet is 160A. If a larger output current is required, multiple cabinets can be connected in parallel.
The feeder screen is equipped with a microcomputer insulation online monitoring device. When a grounding accident occurs in a feeder branch, it can display the branch number and grounding resistance of a certain ground.
The battery screen can be equipped with a microcomputer battery inspection device to monitor the battery status at any time.
The DC voltage transmitter can use high-frequency DC transmitter, when the closing busbar changes in 180-300V voltage, the output voltage of the control line busbar can be firmly stabilized at 220V.
