Direct-current power supply powered by current transformer

Abstract

The invention relates to a direct-current power supply powered by a current transformer. The direct-current power supply comprises an isolating type power supply transformer and a charging circuit; the direct-current power supply further comprises a control protection circuit and an alarming circuit; the isolating type power supply transformer comprises three windings; the three windings comprise a primary side winding and secondary side windings; the primary side winding of the isolating type power supply transformer is connected with the secondary side windings of the current transformer CT through a twisted pair or a cable; the secondary side windings of the isolating type power supply transformer comprise a charging winding and a control winding; an output end of the charging winding is connected with the charging circuit through the cable; an output end of the control winding is connected with the control protection circuit through the cable; the primary side winding and the secondary side windings of the isolating type power supply transformer adopt an insulating measure and a shielding measure; and the alarming circuit is connected with the charging circuit. The direct-current power supply can be used for providing electric energy for stable work of a triggering control circuit of a spark gap for serially compensating an electrical power system under various work conditions.

Description

technical field [0001] The invention belongs to the field of electronics or electric power technology, and specifically relates to a power supply for a spark gap trigger control circuit for series compensation in a power system, in particular to a DC power supply powered by a current transformer. Background technique [0002] The power supply of the spark gap trigger control circuit for series compensation in the power system is located on the series compensation platform, with a high ground potential and a complex electromagnetic environment, which requires high reliability of long-term operation of the power supply. At present, laser energy delivery is usually used to solve the problem of power supply of electronic circuits under high potential. This method is greatly affected by the life of the laser tube, and the cost is very high. [0003] Since 2001, the High Voltage Institute of China Electric Power Research Institute has independently developed complete sets of cont...

AI Technical Summary

Problems solved by technology

Later, in practical applications, it was found that this solution has some shortcomings. One is that there are too many windings (six windings) in the isolated power transformer, which is not conducive to processing; the other is that there are many electronic components used in the charging circuit, which is not conducive to improving reliability. Third, the stray parameters of the isolated power transformer winding have a great influence on the balance of the charging voltage, and the process control is difficult

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