Full-adaptive high-voltage switch controller based on light-coupled control

Abstract

The invention discloses a full-adaptive high-voltage switch controller based on light-coupled control, belonging to control equipment of a high-voltage substation. The switch controller is connected with the operating mechanism of a high-voltage circuit breaker, and is composed of a tripping/switching retaining circuit and a position monitoring circuit. Optical couplers arranged in a switching retaining circuit, a tripping retaining circuit, a tripping position monitoring circuit and a switching position monitoring circuit. One end of each optical coupler luminous component is connected with the operating mechanism of the high-voltage circuit breaker, the other end is connected with the positive pole of a power supply by a position indicating lamp or the normally open contact of a relay, and the contact conductive parts of the optical couplers are connected on the input end of each circuit relay. The controller fully utilizes the characteristics of sensitivity and smaller conductive current of the optical couplers to realize the control of small current on high power devices and the control of various tripping/switching operating mechanisms of which the full adaptive tripping/switching retaining current ranges from 10mA to 15mA on the circuit breaker, thereby greatly improving the safety and reliability of substation protective relaying equipment and an intelligent operating box, relieving the potential safety hazard of the substation, and being applicable to railway and other control systems.

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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