Energy acquisition and power supply management device of current transformer of overhead line

Abstract

The invention discloses an energy acquisition and power supply management device of a current transformer of an overhead line, which is characterized in that both output ends of the current transformer are connected with both input ends of a booster; both output ends of the booster are connected with both input ends of a rectification circuit; the positive output end of the rectification circuit is connected with a load after being connected with a voltage-stabilization output circuit; the second output end of the booster is connected with the power supply output end of a charging circuit; the positive output end of the rectification circuit is connected with the control end of the charging circuit after being connected with a sampling comparison circuit; the output end of the charging circuit is connected with the power supply input end of a gate circuit; the output end of the gate circuit is connected with the input end of a booster circuit; the output end of the booster circuit is connected with the load; and a delaying comparison circuit and the gate circuit are connected. The invention has the advantages that when short circuit or the noload of the overhead line is generated in the energy acquisition process of the current transformer, power is safely and stably supplied to overhead line high-voltage side equipment, in particular to online monitoring equipment.

Description

technical field [0001] The invention relates to a power supply device for equipment on the high-voltage side of an overhead line, in particular to a current transformer energy acquisition and power supply management device for an overhead line. Background technique [0002] With the widespread application of on-line monitoring technology for overhead lines and equipment in power systems, its monitoring functions and scope are becoming wider and wider, which makes the equipment have higher and higher requirements for field power supply. For example, systems such as temperature measurement of high-voltage switch contacts and cable joints, on-line monitoring of conductor icing status, and insulator pollution flashover monitoring are installed on high-voltage sites, limited by geographical conditions, insulation costs, and electrical isolation safety requirements. Generally, the power supply cannot be directly supplied by the low-voltage end, and the power supply becomes the key...

AI Technical Summary

Problems solved by technology

[0004] However, the disadvantages of the existing voltage transformer energy harvesting and current transformer energy harvesting technologies are: there is a certain "working blind zone" overhead line short circuit or "energy harvesting dead zone" overhead line no-load, the power provided is limited, and it cannot be stably operated for a long time. Provide enough power for overhead line high-voltage side equipment, especially online monitoring equipment

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