Special high-tension current inductor transient characteristics tester

Abstract

The invention relates to a super high-voltage current transformer transient characteristics tester. Alternating-current equal ampere-turns bus winding and pulse direct current equal ampere-turns bus winding are respectively winding on the toroid coil of the transient current mutual inductor in acircumference homogeneous distribution mode, the turn number of the two windings is equal, the two windings use common decoupling electric impedance; the alternating-current equal ampere-turns bus winding is connected with the output end of a large-capacity step down transformer through a switch, consisting an alternating-current t equal ampere-turns loop; the direct current equal ampere-turns bus winding is connected with one or two capacitor charged with high voltage through a switch, a reactor and a resistor, consisting a direct current equal ampere-turns loop. The discharging time sequence is operated by a measurement and control apparatus, the desired transient experiment current can be obtained on the ring shaped iron core of the tested transient current mutual inductor when the two loops are combined for discharging. The invention possesses the advantages of novel concept, reasonabledesign, simple structure, easy operation, reduced experimentation cost of the extra-high voltage transient current mutual inductor and reduced electromagnetic pollution of experiment current to surroundings.

Description

Technical field [0001] The invention relates to a test device for the transient characteristics of a current transformer, in particular to a test device for the transient characteristics of an ultra-high voltage current transformer, which belongs to the field of ultra-high voltage power equipment. Background technique [0002] Usually, the operating voltage of the UHV power grid exceeds 1000kV. When an accident occurs in the power grid, a larger short-circuit current will be generated than that of the UHV power grid, for example, reaching more than 100kA. This requires that the current transformer installed in the UHV grid for protection can respond to a larger fault current than in the past. As far as the applicant knows, the existing test equipment for the transient characteristics of current transformers is not suitable for such current transformers in terms of the technical level of the existing test equipment without technical transformation or the use of auxiliary tech...

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Problems solved by technology

[0003] The purpose of the present invention is to improve the technology for the problem that the existing test equipment is difficult to test the transient characteristics of UHV current transformers, and propose a device for testing the transient characteristics of UHV current transformers. Under certain conditions, it meets the needs of the transient characteristic test of UHV current transformers

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