Residual voltage recording module and residual voltage detection method of recloser type feed line terminal

Abstract

A residual voltage recording module and a residual voltage detection method of recloser type feed line terminal relate to the field of power detection equipment, and especially to a recloser that feedline terminal for detecting the residual voltage and locking in power failure and a related method. The residual voltage recording module structurally comprises a rectification module, a current-limiting resistor, an energy storage capacitor, a freewheeling diode, a clamping diode, a bistable relay, and a voltage monopulse maintenance module. When there is residual voltage in a power distributionline, a residual voltage event recording module records a residual voltage event and maintains the residual voltage. After that the feed line terminal runs normally, state information in the residualvoltage event recording module is detected to determine a residual voltage fault, a corresponding motion is executed, and a fault area is isolated. The residual voltage event recording module employsall reactive devices, the motion time is short, the residual voltage event can be recorded, the feed line terminal can accurately determine a fault position according to information of the residual voltage event recording module, the fault line is isolated, and power supply of the normal line is ensured.

Description

technical field [0001] The invention relates to the field of electric power detection equipment, in particular to a recloser-type feeder terminal and method for detecting residual voltage during power failure and blocking. Background technique [0002] With the development of the economy, the reliability and security requirements of the power grid are getting higher and higher. How to improve the reliability of power supply becomes the key to the feeder terminal. Local feeder automation is an important measure to ensure the safety of power supply. [0003] Local feeder automation includes recloser feeder automation and intelligent distributed feeder automation. Recloser-type feeder automation is suitable for areas that do not have reliable communication conditions or areas that do not have communication conditions between the main station and the terminal. It can be applied to overhead lines, overhead cable hybrid lines and cable lines, and has a wide range of practical ap...

AI Technical Summary

Problems solved by technology

However, the minimum maintenance time of the residual voltage is only tens of milliseconds. When the residual voltage maintenance time is short and the residual voltage is low, the above residual voltage detection circuit may not meet the operating conditions, resulting in missed detection.

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