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Power frequency magnetron series resonant high voltage test device and high voltage test method

A series resonance, high voltage test technology, applied in the direction of testing dielectric strength, etc.

Inactive Publication Date: 2015-11-11
王礼卿
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, this test result can only be approximated or equivalent to the power frequency AC withstand voltage test

Method used

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  • Power frequency magnetron series resonant high voltage test device and high voltage test method

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] A power frequency magnetic control series resonance high-voltage test device, including a magnetic control step-up transformer 4, the secondary of the magnetic control step-up transformer 4 is a high-voltage step-up winding, and the high-voltage step-up winding is also the high-voltage in the magnetic control step-up transformer 4 Adjustable inductance, one end of the high-voltage boost winding is grounded, the other end is connected to the high-voltage fixed reactor group 5, and the high-voltage fixed reactor group 5 pairs the voltage U raised by the high-voltage boost winding. 0 Boost the voltage again and output the test voltage U 2 , test voltage U 2 The tested product circuit 6 applied to a capacitive load; the primary of the magnetron step-up transformer 4 includes an excitation winding 1, a measurement winding 2, and a magnetron winding 3...

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Abstract

The invention discloses a power frequency magnetron series resonant high voltage test device and a high voltage test method. The device comprises a magnetron step-up transformer. The secondary level is a high voltage step-up winding. One end of the high voltage step-up winding is grounded. The other end is connected with the input end of a high voltage fixed reactor group. The high voltage fixed reactor group boosts voltage boosted by a high voltage adjustable reactor, outputs test voltage and applies the test voltage on a test object circuit with a capacitive load. The magnitude of magnetron winding direct current coming into the primary magnetron step-up transformer is adjusted. The alternating current magnetization curve of an adjustable inductor iron core in the magnetron step-up transformer is changed. The inductance value of a high voltage adjustable inductor is adjusted. The high voltage adjustable reactor, the inductor of the high voltage fixed reactor group and a test object capacitor are resonant. Due to high quality factor of a resonant circuit, the capacity of a needed test power supply is only 1 / Q. The capacity of the test power supply is greatly reduced. The volume of the power supply is reduced. The weight of the power supply is reduced.

Description

technical field [0001] The technology of the present invention relates to the field of boost test and inspection of electrical equipment in a power system, and in particular relates to a power frequency magnetic control series resonance high voltage test device and a high voltage test method for a power frequency AC withstand voltage test of high voltage electrical equipment in a power system. Background technique [0002] Since the "Test Guidelines" of the working group of the International Large Power Grid Federation, the draft standards of IEC60840 and IEC62067, the large-capacity high-voltage test devices for high-voltage electrical equipment have been tried by all countries in the world for the convenience of handling and on-site installation tests. It is necessary to make the large-capacity high-voltage test device smaller in size and lighter in weight. According to statistics, the capacity of the current high-voltage test equipment in our country needs to be 200KVA, a...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 王礼卿
Owner 王礼卿
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