Integrated DC ice melting device SVG power module bypass structure and control method thereof

Abstract

The invention discloses an integrated DC ice melting device SVG power module bypass structure and a control method thereof. The bypass structure comprises a rapid breaker, an electric operating mechanism, a control communication module and a DC switch power source, wherein the rapid breaker is connected in parallel with a DC output end of a power module, a control output end of the electric operating mechanism is connected with a control end of the rapid breaker, the electric operating mechanism is connected with the control communication module, and an output end of the DC switch power sourceis connected with the electric operating mechanism and the control communication module. The control method of the bypass structure comprises steps that a state quantity of the power module is detected through the control communication module, state change of the power module is determined according to the state quantity, a switch state of the rapid breaker is controlled according to state changeof the power module, and automatic bypass of the power module of an integrated DC ice melting device SVG is realized when the power module is in fault. The bypass structure has advantages of simple structure, reliable performance, economical cost, safety, reliability and convenient and rapid enforcement.

Description

technical field [0001] The invention relates to electrical engineering technology, in particular to an SVG power module bypass structure of an intensive DC deicing device and a control method thereof. Background technique [0002] DC icing is the most direct and effective means for transmission lines to fight against rain, snow and freezing disasters, and it effectively guarantees the safe and stable operation of large power grids during the ice-covered winter period. The intensive DC deicing device has a dynamic reactive power compensation function based on the DC deicing, and the reactive power compensation function is realized by SVG. Therefore, the device can perform dynamic reactive power compensation to the power grid during the non-icing period, which greatly improves the utilization rate of the device. At present, the mainstream SVG structure is a chain structure. Each chain link is composed of N identical power modules in series. The core of the power module is an ...

AI Technical Summary

Problems solved by technology

This bypass structure is relatively complex, bulky, and costly, making it difficult to popularize and use it in a large area.

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