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Short-circuit breaking test method and system for high-voltage alternating-current circuit breaker

A high-voltage AC and test method technology, applied in the electrical field, can solve problems such as inability to obtain short-circuit current

Pending Publication Date: 2022-04-12
XIAN HIGH VOLTAGE APP RES INST CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the short-circuit breaking test of some special high-voltage AC circuit breakers (such as high-voltage alternator circuit breakers), the test circuit needs to provide a short-circuit current with a DC component exceeding 100% in a period of time, and the prior art still cannot obtain such a test. short circuit current

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  • Short-circuit breaking test method and system for high-voltage alternating-current circuit breaker
  • Short-circuit breaking test method and system for high-voltage alternating-current circuit breaker
  • Short-circuit breaking test method and system for high-voltage alternating-current circuit breaker

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] The embodiment of the present invention discloses a short-circuit breaking test method of a high-voltage AC circuit breaker, which is applied to a short-circuit breaking test circuit of a high-voltage AC circuit breaker, so as to provide a DC component exceeding 100% for a period of time for a high-voltage AC circuit breaker TO short-circuit current.

[0056] Such as Figure 1a or Figure 1b As shown, the short-circuit breaking test circuit of the high...

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Abstract

The invention discloses a short-circuit breaking test method and system for a high-voltage alternating-current circuit breaker. Short-circuit current with the direct-current component exceeding 100% is provided for the high-voltage alternating-current circuit breaker TO. The generator system outputs short-circuit current through a secondary winding of the transformer T1; a primary winding of the transformer T1 is connected to an alternating current power supply; the first end of the secondary side of the T1 is connected with a series structure formed by an auxiliary switch AB and an electric reactor L4 through an electric reactor L3; the second end of the series structure and the second end of the secondary winding of the transformer T1 are grounded, and the high-voltage alternating-current circuit breaker TO is connected to the series structure in parallel. The method comprises the following steps: controlling a closing switch connected between an alternating current power supply and a transformer T1 to be closed at the voltage zero crossing point of the alternating current power supply, and closing AB after TO current lasts for preset time to obtain short-circuit current with the direct current component exceeding 100%.

Description

technical field [0001] The invention relates to the field of electrical technology, and more specifically, to a short-circuit breaking test method and system for a high-voltage AC circuit breaker. Background technique [0002] In the short-circuit breaking test of ordinary high-voltage AC circuit breakers, the test circuit generally only needs to provide a short-circuit current that is symmetrical or that the DC component does not exceed 75%. get such a short circuit current. [0003] However, in the short-circuit breaking test of some special high-voltage AC circuit breakers (such as high-voltage alternator circuit breakers), the test circuit needs to provide a short-circuit current with a DC component exceeding 100% in a period of time, and the prior art still cannot obtain such a test. short circuit current. Contents of the invention [0004] In view of this, the present invention provides a short-circuit breaking test method and system for a high-voltage AC circuit b...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 刘浩军李阳宇文博者永祥苏海博莫文雄王勇顾乐
Owner XIAN HIGH VOLTAGE APP RES INST CO LTD
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