Converter transformer symmetrical voltage boosting no-load test circuit

A converter transformer, no-load test technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problems of inability to move maintenance, large power supply, difficult transportation, etc., to achieve convenient transportation and on-site installation, high power supply , to ensure the effect of three-phase power
CN105182103AInactive Publication Date: 2015-12-23EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
Publication Date
2015-12-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a converter transformer symmetrical voltage boosting no-load test circuit. The converter transformer symmetrical voltage boosting no-load test circuit comprises a variable-frequency power supply cabinet, an excitation transformer T1 and an excitation transformer T2 which are of the same structure, three-order harmonic filters, five-order harmonic filters, a converter transformer, a voltage transformer TV and a current transformer TA; one three-order harmonic filter and one five-order harmonic filter are connected in parallel between an A end and a B end as well as between a C end and a D end respectively; a grid-side bushing of the converter transformer is suspended; two ends of a valve-side bushing of the converter transformer are respectively connected with the A end and the C end; the primary winding of the current transformer TA is connected in series with the A end or on a connecting line between the C end and the valve-side bushing of the converter transformer; and two ends of the primary winding of the voltage transformer TV are respectively connected with the A end and the C end. According to the converter transformer symmetrical voltage boosting no-load test circuit of the invention, the three-order harmonic filters and the five-order harmonic filters are adopted to effectively filter out harmonic generated in the converter transformer in a no-load test, and the excitation transformers and the capacity of a variable-frequency power supply can be effectively used.
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Description

technical field

[0001] The invention relates to a test circuit which can be used in the factory test of a converter transformer and the no-load test after on-site maintenance. The bushing on the valve side is symmetrically pressurized, and has the functions of low equipment voltage, convenient movement, and convenient on-site use. Background technique

[0002] At present, the no-load test of domestic converter transformers after leaving the factory and on-site maintenance generally adopts the unilateral pressurization method on the valve side. Among them, the factory test adopts the power supply method provided by the generator, and the test after on-site maintenance adopts the variable frequency power supply method. Their problem is that the ex-factory test equipment cannot be moved to the site for testing because the generator is used to provide power, and the operation and maintenance of the generator itself is very complicated, and the no-load test after on-site maintenan...

Claims

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