Cascading-type big-power high-frequency high-voltage ice melting excitation power circuit for full-control device unit

Abstract

The invention discloses a cascading-type big-power high-frequency high-voltage ice melting excitation power circuit for a full-control device unit, and the power circuit comprises power units. The power units are connected in parallel, and the input ends of the power units are connected with a station transformer through a filtering inductor. The output ends of the power units are connected with the input end of a high-frequency boost transformer, and the output end of the high-frequency boost transformer is connected with an icing circuit. The circuit solves technical problems that the power-off loss of an extrahigh-voltage power transmission line is great because the DC ice melting and AC ice melting modes which are employed in the prior art and can be used for the power transmission lines at various voltage levels (500kV or less) need a line power transmission cutoff condition for ice melting.

Description

technical field [0001] The invention belongs to the ice-melting technology of power transmission lines, and in particular relates to a full-control device unit cascaded high-power high-frequency high-voltage ice-melting excitation power supply circuit. Background technique [0002] Severe icing of transmission lines will cause damage to power facilities and endanger the safe operation of power systems. Therefore, research on deicing technology for transmission lines has long been valued by scholars at home and abroad. At present, the main deicing methods used in power systems include thermal deicing, mechanical deicing and natural deicing, among which thermal deicing is the most widely used in practical engineering, including DC deicing and AC deicing, which can be It is applied to transmission lines of various voltage levels of 500kV and below, but these deicing methods need to melt ice when the line stops power transmission, which will cause huge power failure losses for u...

AI Technical Summary

Problems solved by technology

At present, the main deicing methods used in power systems include thermal deicing, mechanical deicing and natural deicing, among which thermal deicing is the most widely used in practical engineering, including DC deicing and AC deicing, which can be It is applied to transmission lines of various voltage levels of 500kV and below, but these deicing methods need to melt ice when the line stops power transmission, which will cause huge power failure losses for ultra-high voltage transmission lines

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