Fully Adaptable High Voltage Switch Controller Based on Optocoupler Control

Abstract

The fully adaptive high-voltage switch controller based on optocoupler control belongs to the high-voltage substation control equipment. Connected with the operating mechanism of the high-voltage circuit breaker, it is composed of a tripping and closing holding circuit and a position monitoring circuit. Set the optocoupler in the closing hold, trip hold and trip position monitoring, closing position monitoring circuits. One end of each optocoupler light-emitting part is connected to the operating mechanism of the circuit high-voltage circuit breaker, and the other end is connected to the positive pole of the control power supply through the position indicator light or the normally open contact of the relay. The conductive part of the contact of the optocoupler is connected to the input end of each circuit relay. This controller makes full use of the characteristics of optocoupler sensitivity and small conduction current to realize the control of small currents on high-power devices, and is fully suitable for various tripping and closing operating mechanisms with currents ranging from 10mA to 5A. The control of the relay greatly improves the safety and reliability of the relay protection device and the intelligent operation box of the substation, eliminates the potential safety hazard of the substation, and can also be used in other control systems such as railways.

Description

Technical field [0001] The invention relates to a control device of a voltage substation in a power system, in particular to a full-adaptive high-voltage switch controller based on optocoupler control. Background technique [0002] As a high-voltage switch, the high-voltage circuit breaker is the main power control equipment in the substation. It has arc-extinguishing characteristics. When the system is operating normally, it can cut off and connect the no-load and load currents of the lines and various electrical equipment; When a fault occurs, it cooperates with the relay protection to quickly cut off the fault current to prevent the expansion of the scope of the accident. Therefore, the quality of the high-voltage circuit breaker directly affects the safe operation of the power system. The quality of the circuit breaker is closely related to the control device of the circuit breaker, and the reasonable cooperation between the control device and the operating mechanism of...

AI Technical Summary

Problems solved by technology

This kind of controller can ensure the circuit breaker tripping and closing of various circuit breaker operating mechanisms to keep the current working normally within the range of 10mA to 5A, completely solve the problem that the current small current operating mechanism cannot be used directly, and greatly improve the relay protection of substations The safety and reliability of the device and the intelligent operation box eliminate the hidden dangers of the safe operation of the substation

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