A voltage sag control device and method for removing voltage detection

Abstract

The invention discloses a voltage sag treatment device and method for voltage removal detection. The voltage sag treatment device comprises an external damage prevention device and a voltage sag treatment device, wherein the external damage prevention device comprises a detection sensor, a first controller, an image collector and a communication module; the voltage sag treatment device comprises auser signal receiving device, a switching device, an energy storage device, an inverter, a second controller, a reactance module and a signal collector; the first controller is used for receiving signals of the detection sensor, the image collector and the communication module and controlling the image sensor and the communication module to act; the communication module is used for sending earlywarning signals to the signal receiving devices of the user side and the server side; the signal collector is used for collecting a working signal of the inverter and feeding back the working signal to the second controller; and the second controller is used for receiving the signal and controlling the inverter and the switching device to act. According to the invention, pre-accident treatment canbe carried out, and the treatment efficiency is greatly improved; and the occupied space and the purchasing cost of treatment equipment are saved, and the economic pressure of users is relieved.

Description

technical field [0001] The invention relates to the technical field of voltage sags, in particular to a voltage sag control device and method without voltage detection. Background technique [0002] With the development of economy and technology, more and more sensitive loads are connected to the power grid, and users have higher and higher requirements for power quality. Voltage sag is one of the main power quality problems, and its control technology has attracted extensive attention from scholars at home and abroad. The causes of voltage sag include short-circuit fault, large motor start-up, transformer excitation, etc. Among them, the residual voltage of large motor startup and transformer excitation is large, which has little impact on sensitive users, and short-circuit fault has a greater impact on sensitive users. Short-circuit faults on transmission lines are often caused by long-arm cranes and cranes accidentally hanging lines when working under transmission lines...

AI Technical Summary

Problems solved by technology

In the traditional voltage sag control method, although the user has completed the control, they do not know the cause of the accident. At the same time, the power grid company also lacks pertinence when carrying out voltage sag control

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