A method of capture, early warning and avoidance of power grid "flash"

Abstract

The invention relates to a flash capturing, early-warning and avoidance method of a power grid. The method comprises the steps of 1, an early-warning scheme, in which the early-warning scheme is divided into two-stage early-warning: (1) a flash signal is captured by an integrated protection device reserved for partitioning of a high-voltage cabinet so as to achieve that early-warning is used as secondary early-warning; and (2) a primary early-warning system is built in order to further improve capturing accuracy and comprises a phase sequence protector KH, two indication lamps X1 and X2, an alarm bell JL, an intermediate relay KA1 and a manual button SB1, and a filter capacitor is arranged in the phase sequence protector KH; and 2, an avoidance scheme, in which the avoidance scheme is matched with the primary early-warning scheme and the secondary early-warning scheme which are set, equipment which is used for providing an energy source for a whole company every time during shutdown due to flash of the power grid comprises a large-size air compressor and a large-size refrigerator, and a flash prevention measure is targetedly taken. By employing the scheme and combining rapid reaction and close surveillance of personal and by multiple experiments and verification, the important equipment is basically enabled not to be shutdown during flash of the power grid, and the safety of the production line of the whole company is ensured.

Description

technical field [0001] The invention belongs to the field of power grid security control, and in particular relates to a method and an early warning system for capturing, early warning and avoiding "flash failure" of a power grid. Background technique [0002] Enterprise power supply, the external network "flash" frequently, and the existing power supply and background monitoring system, can not capture the "flash" information, and "flash" caused the shutdown of important equipment air compressors and refrigerators, resulting in production line equipment Downtime produces a large amount of waste products, which has a very negative impact on the production of enterprises. [0003] To solve this problem, we need to start from two aspects: 1. Capture and early warning of "flash" of the power grid; 2. Avoid shutdown problems when the power grid of important equipment air compressors and refrigerators "flash". [0004] However, it costs at least 200,000 to 300,000 yuan to purcha...

AI Technical Summary

Problems solved by technology

[0004] However, it costs at least 200,000 to 300,000 yuan to purchase a professional capture "flash" instrument, which is expensive and unrealistic. Using the existing device, add some devices and circuits, and capture the "flash" information by yourself to realize instant warning, so that Inform the relevant personnel in the shortest possible time so that necessary countermeasures can be taken

Images