High-voltage dynamic filtering power-saving device for mine

Abstract

The invention provides an IGBT (Insulated Gate Bipolar Transistor)-based high-voltage dynamic filtering power-saving device for a mine, comprising an active filter measuring-controlling and driving circuit, a smoothing filter, a main active filter circuit, a signal detecting circuit, a relay protection signal detecting circuit, a passive filter circuit, an active filter boosting transformer and a grid protecting circuit. A huge controllable reactor which absorbs reactive power and consumes active power in an SVC (Static Var Compensator) is replaced with a capacitor device sending reactive power; and a silicon controlled rectifier for generating harmonics is replaced with a novel electronic switch element, i.e., an IGBT of which the electric property is higher than that of a GTR (Giant Transistor). All the elements are arranged in a flameproof box, so that dynamic reactive compensation harmonic treatment equipment can enter underground, and the aims of reducing line loss and increasing the voltage at a tail end are achieved.

Description

technical field [0001] The invention relates to an electricity-saving device used in an electricity-consuming unit, in particular to a mine-used high-voltage dynamic filter electricity-saving device. Background technique [0002] At present, high-voltage reactive power filter devices are mainly divided into two types, one is passive filter for static reactive power compensation; the other is SVC [FC+TCR] dynamic reactive power filter composed of active filter and passive filter device. [0003] The so-called SVC dynamic compensation is composed of multiple groups of single harmonic tuning capacitors and reactors. The sum of capacitor capacity [for example, 1000kvar capacitor] prevents the current of the capacitor from being sent back to the power system when the inductive load stops, and uses the conduction angle of the thyristor to quickly deliver the capacitive current of the capacitor bank that is too late to exit to the pseudo-inductive load reactor Inside, to achieve ...

AI Technical Summary

Problems solved by technology

[0008] It is impossible to use SVC underground, because the huge controllable reactor cannot be installed in the explosion-proof box

If it is installed on a well away from the substation, the line will be the load current when there is a load, and the electric controller current will be the current when the load stops. It is impossible to talk about the purpose of increasing the power rate and reducing the line loss.

Images