High potential gate control device for series thyristor valve block in SVC (Static Var Compensator)

Abstract

The invention relates to a high potential gate control device for a series thyristor valve block in an SVC (Static Var Compensator). The device comprises a plurality of gate control modules, a control unit, an energy acquiring unit, a photoelectric conversion unit, a voltage detection unit and a protection unit, wherein each gate control module is used for controlling two thyristors which respectively correspond to the gate control module; the control unit is used for triggering the thyristors according to a trigger command, acquiring and transmitting state information of the thyristors to the photoelectric conversion unit and transmitting alarm information according to detection information of the voltage detection unit; the energy acquiring unit is used for supplying power to the control unit; the photoelectric conversion unit is used for photoelectrically converting and uploading the rexeived trigger command and the state information of the thyristors; the voltage detection unit is used for detecting the voltage of the energy acquiring unit and transmitting the detection information to the control unit; and the protection unit is used for carrying out voltage breakdown protection on the thyristors. The device disclosed by the invention has the advantages of high integrated level, high reliability and low power consumption and can be used for providing sound control and protection for a high-voltage series thyristor valve block in the SVC system.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a high-potential gate control device for a series thyristor valve group suitable for a voltage level of 6kV to 66kV. Background technique [0002] With the development of the national economy and the advancement of modern technology, the load of the power grid has increased sharply, and the requirements for inductive reactive power of the power grid are also increasing day by day. Especially with the continuous increase of impact load and non-linear load capacity such as reversible large-scale steel rolling mill and steel-making electric arc furnace, coupled with the commonly used power electronics and micro-electric technology, voltage waveform distortion and voltage fluctuation flicker occur in the power grid And three-phase imbalance and other problems, resulting in adverse effects such as reduced power quality, reduced power factor of the grid, and increased network...

AI Technical Summary

Problems solved by technology

Especially with the continuous increase of impact load and non-linear load capacity such as reversible large-scale steel rolling mill and steel-making electric arc furnace, coupled with the commonly used power electronics and micro-electric technology, voltage waveform distortion and voltage fluctuation flicker occur in the power grid And three-phase imbalance and other problems, resulting in adverse effects such as reduced power quality, reduced power factor of the grid, and increased network loss

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