A comprehensive protection control system and method for integrating high-voltage power distribution and equipment operation

Abstract

The invention provides a high-voltage power distribution and device operation integrated comprehensive protection control system and method. The system comprises a comprehensive protection controller, an upper computer, a voltage acquisition unit and a current acquisition unit, and the comprehensive protection controller is connected with the upper computer in a communication manner, connected with the voltage acquisition unit and the current acquisition unit through an AI (artificial intelligence) port, connected with a breaking and closing signal port of a high-voltage circuit breaker through a DO port and connected with a driving device signal end of a low-voltage fan or a water pump and a valve control signal end of the fan or a pump outlet through a DO port and an AO port. According to the system, the controller takes a high-speed DSP (digital signal processor) chip as a control core and is provided with an infinitely extensible IO (input output) module, three-phase voltage and current signals of a bus are acquired, high-voltage power distribution comprehensive protection is achieved, and a high-voltage device and a low-voltage device are controlled and protected in a linkage manner. When a power distribution bus end is faulted, a high-voltage power supply and a power supply circuit of a low-voltage key device are cut off or switched to a stand-by power supply, and the device is rapidly protected.

Description

technical field [0001] The invention relates to the technical field of high-voltage power distribution protection, in particular to a comprehensive protection control system and method for integrating high-voltage power distribution and equipment operation. Background technique [0002] In the existing high-voltage systems such as small and medium-sized pumping stations and fan rooms, the voltage levels of high-voltage and low-voltage electrical load electrical equipment coexist. Traditionally, PLC and comprehensive automatic protection systems are used to achieve centralized monitoring. The drive control of electrical equipment is monitored by PLC. The high-voltage equipment adopts the comprehensive automation system of the substation and is designed according to the hierarchical distributed object-oriented system structure. Due to the separate and independent control and protection of high-voltage and low-voltage equipment, it is impossible to achieve interlocking between v...

AI Technical Summary

Problems solved by technology

The drive control of electrical equipment is monitored by PLC. The high-voltage equipment adopts the comprehensive automation system of the substation and is designed according to the hierarchical distributed object-oriented system structure. Due to the separate and independent control and protection of high-voltage and low-voltage equipment, it is impossible to achieve interlocking between various equipment control and protection, and the comprehensive protection system cannot protect the power supply of related low-voltage equipment in time when dealing with faults on the high-voltage side

[0003] In the existing technology, most of the comprehensive automatic protection devices are standard products purchased by the manufacturer, equipped with a background monitoring system, which can only realize the power distribution protection of the high-voltage side, and the user cannot re-develop and program, and there is no IO port that can be expanded infinitely , cannot achieve linkage with other devices

[0004] In the prior art, there is also a technology that uses PLC to realize the comprehensive protection function, but it can only do some basic protection functions, and it is still unstable; there is a DSP chip in the comprehensive protection, but there is no PLC. Functions such as recording and wave recording, storage, and display can be realized, but the speed cannot reach the standard of comprehensive protection. For example, the quick break is 0 seconds, and the main function of relay protection requires speed. Using PLC will magnify the fault switch to upper level

[0005] Moreover, PLC is a standard product. Although it is a programmable product, its programming is actually a secondary development programming, and it cannot directly program the chip. Its internal communication protocol is a standard communication protocol, and it cannot communicate with non-standard communication equipment.

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