Microcomputer monitoring of DC power supply in power system

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Microcomputer monitoring of DC power supply in power system [Copy link]

Microcomputer monitoring of DC power supply in power system

The DC power supply for power system is mainly used in the substations of hydropower stations, power plants, regions and factories and mines as the operating power supply of switches and circuit breakers; the DC power supply of control, protection, signal and other equipment. The DC power supply for power system is usually composed of converters, batteries and other auxiliary circuits. It is required to be stable, reliable, easy to adjust and able to be monitored.

At present, semiconductor uncontrolled rectification or phase-controlled rectification DC power supplies are widely used. In addition to being bulky, large in size and weight, consuming a lot of non-ferrous metals and ferrous metals, having a low power factor, and causing serious harmonic pollution to the power grid, these DC power supply products also have the following disadvantages:

(1) Poor accuracy of current and voltage stabilization;

(2) It cannot automatically and accurately follow the charging curve f(i,t)

Charging and timely switching;

(3) It does not have the comprehensive calculation and monitoring capabilities of multiple points and multiple variables over a large area;

(4) Since they are mostly composed of analog circuits, they are difficult to interface with computers.