Combined automatic tracing arc extinction compensation and line selecting device

Abstract

This invention tracking arc-extinction compensation and select-switching device comprises: Z type grounding transformer connected to bus-bar, which neutral point being connected to one end of arc-extinction coil L1 by a single phase isolation switch, other end of L1 is grounding, said neutral point being connected to lightning protector and a single phase voltage inductance, the secondary wniding, by two ends, being paralleling respectively (1). compensated reactor branching which being composed of a compensated reactor and a silicon cotnrol series connected; (2). buffer resistance branching which being composed of series connected a buffer resistance and a silicon control, zero sequence current mutual inductor CT1-CT48 feedthrough connected to various out line of the sstem. The sampling signals and control signals is connected to controlling device. Advantages are: reliability, no need of filter.

Description

technical field [0001] The invention relates to an automatic tracking arc suppression compensation and line selection device, in particular to a highly reliable combined automatic tracking arc suppression compensation and line selection device. For use in electrical technology. Background technique [0002] At present, among various types of arc suppression coils at home and abroad, the capacity-adjusting arc suppression coil needs to be maintained by secondary equipment because of its compensation current, and the capacitor has a large impact when a single-phase ground fault occurs, and its reliability is low. maintain. The thyristor-controlled high-short-circuit impedance type (phase-controlled) arc-suppression coil device flows through the thyristor part with a large current of thousands of amperes, which causes serious heat generation, low reliability, and large harmonics. In practical applications Harmonic resonance overvoltages may also occur. There are other types ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a combined automatic tracking arc suppression compensation and line selection device for the deficiencies of the existing arc suppression coil device technology, which is a highly reliable turn-adjustable arc suppression coil device with secondary winding , the compensation current of the arc suppression coil can be adjusted continuously, which overcomes the defect that the traditional arc suppression coil can only be adjusted in stages. The problem that the turn-type arc suppressing coil device cannot be continuously adjusted, and the system can quickly eliminate the fault when a single-phase ground occurs

Images