Intelligent high-voltage thyristor switched capacitor (TSC) reactive compensation device

Abstract

The invention relates to an intelligent high-voltage thyristor switched capacitor (TSC) reactive compensation device which comprises a potential current transformer, a signal adjusting unit, a digital signal processor (DSP) main control and display unit, an optical fiber isolation and thyristor driving unit and a reactive compensation main wiring unit, wherein the signal adjusting unit comprises a voltage amplitude adjustment module, a current amplitude adjustment module, a synchronous square wave generation module, a filter module and a lifting module which are sequentially connected; outputs of the synchronous square wave generation module and the lifting module are respectively connected with an input capture hole and an analog-to-digital (AD) conversion hole of a DSP in the DSP main control and display unit; an output input / output (IO) port of the DSP in the DSP main control and display unit is connected with an input end of an optical fiber transmitter of the optical fiber isolation and thyristor driving unit; and an output end of the optical fiber isolation and thyristor driving unit is connected with a gate pole and a cathode of a thyristor in the reactive compensation main wiring unit. The intelligent high-voltage TSC reactive compensation device realizes zero-crossing voltage input and capacitor bank cyclical switchover, does not have the problem of switching oscillation, and is used for reactive compensation of transformer substations in the industries such as metallurgy, steel and coal.

Description

technical field [0001] The invention relates to a reactive power compensation device, in particular to a TSC type reactive power compensation device, and belongs to the technical field of reactive power compensation. Background technique [0002] At present, most reactive power compensation devices in my country are mechanical switch switching capacitor MSC and thyristor switching capacitor TSC. Due to the long and erratic mechanical switching time of MSC, it cannot be switched on accurately and quickly at the voltage zero crossing point, which may easily cause excessive inrush current and damage the capacitor bank. And when the capacitor bank is disconnected, an electric arc is easily generated, causing the mechanical switch contacts to be arced and burned, which brings unnecessary troubles to the maintenance personnel. However, most of the current TSC devices do not realize the cyclic switching of the capacitor bank, and there is a problem of switching oscillation, which ...

AI Technical Summary

Problems solved by technology

Due to the long and erratic mechanical switching time of MSC, it cannot be switched on accurately and quickly at the zero-crossing point of the voltage, which may easily cause excessive inrush current and damage the capacitor bank.

And when the capacitor bank is disconnected, it is easy to generate an arc, which will cause the mechanical switch contacts to be arced and burned, which will bring unnecessary trouble to the maintenance personnel.

However, most of the current TSC devices have not realized the cyclic switching of capacitor banks, and there is a problem of switching oscillation, which will undoubtedly reduce the average service life of capacitor banks and cause system instability.

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