High-voltage side standby power supply automatic switching device based on PLC and automatic switching method of high-voltage side standby power supply automatic switching device

Abstract

The invention discloses a high-voltage side standby power supply automatic switching device based on a PLC (Programmable Logic Controller) and an automatic switching method of the high-voltage side standby power supply automatic switching device. The first bus, the second bus, the third bus, the first in-plant power supply incoming line, the second in-plant power supply incoming line, the third in-plant power supply incoming line, the fourth in-plant power supply incoming line, the fifth external power supply incoming line, the first incoming line switch, the second incoming line switch, the third incoming line switch, the fourth incoming line switch, the fifth incoming line switch and the first bus tie switch are all connected with the PLC. The first in-plant power supply incoming line and the second in-plant power supply incoming line are respectively connected with the first bus, the third in-plant power supply incoming line and the fourth in-plant power supply incoming line are respectively connected with the third bus, the fifth external power supply incoming line is connected with the second bus, and the incoming line switches are respectively arranged on the power supply incoming lines. And the bus tie switch is arranged between the buses. The automatic switching device and the automatic switching method thereof are high in stability, reliable in operation mode switching, simple in automatic switching circuit and high in automatic switching efficiency.

Description

technical field [0001] The invention belongs to the technical field of standby power supply self-switching, and in particular relates to a PLC-based high-voltage side standby power supply self-switching device and a self-switching method. Background technique [0002] With the increasing modernization of production and life, people's demand for and dependence on electricity are also increasing, and the requirements for power quality are becoming more stringent. The goal of uninterruptible power supply is advancing, and some power users have more prominent requirements for uninterrupted power supply, especially during the peak period of power consumption. To ensure the uninterrupted power supply of the power supply and the high reliability of the power supply, it has become an important part of the protection and control loop in modern power distribution engineering. [0003] Especially for the high-voltage side backup power supply of the power station and the setting of the...

AI Technical Summary

Problems solved by technology

[0003] Especially for the backup power supply on the high-voltage side of the power station and the setting of the backup power self-injection device, it is particularly important. In the process, the stability is not high, which leads to certain safety hazards in the stable operation of the power consumption system. At the same time, with the increase of various types of power consumption equipment, the power supply also needs a variety of corresponding operation modes to adapt to it. However, the current standby The power supply auto-input device cannot be well adapted to various operating modes, resulting in complex auto-initial circuits and low auto-input efficiency during the process of setting the operating modes

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