Distribution network equipment AC/DC voltage withstand device

Abstract

The invention provides a distribution network equipment AC / DC voltage withstand device comprising a measurement and control loop of a user instruction input unit and a master control unit and a main loop of a DC voltage generator, an on / off switcher and an AC / DC inverter. The user instruction input unit acquires operation instructions of users for DC, power frequency AC or frequency multiplication AC voltage withstand tests. The master control unit receives the operation instructions of the user instruction input unit and generates different control instructions, adjusting instructions and inversion instructions. The DC voltage generator generates corresponding direct current according to the adjusting instructions. The on / off switcher realizes switching of direct current of the DC voltage withstand test or the power frequency and frequency multiplication AC voltage withstand tests according to the control instructions. The AC / DC inverter is used for realizing the power frequency or frequency multiplication AC voltage withstand test according to the current inversion instruction and inversion alternating current. With application of the distribution network equipment AC / DC voltage withstand device, the DC, power frequency AC and frequency multiplication AC voltage withstand tests of distribution network equipment can be simultaneously completed so that the test instrument and device types can be reduced and acquisition cost and area occupation can be reduced.

Description

technical field [0001] The invention relates to the technical field of withstand voltage testing of distribution network equipment, in particular to an AC and DC withstand voltage device for distribution network equipment. Background technique [0002] With the development of power technology, the types of distribution network equipment are becoming more and more complete. However, in order to meet the requirements of national and industry standards, all kinds of distribution network equipment need to be tested. Usually, the test items of distribution network equipment include insulation resistance measurement, DC resistance test, loop resistance test, voltage ratio test and insulation test, etc., and the insulation test, which is one of the important assessment tests of distribution network equipment, mainly includes DC withstand voltage Test, power frequency AC withstand voltage test and double frequency AC withstand voltage test. [0003] In the prior art, due to the sin...

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Problems solved by technology

[0003] In the prior art, due to the single function of the test instruments and test devices for the insulation test of distribution network equipment, different instruments or devices are required to complete different withstand voltage tests (for example, DC high voltage generators are required for DC withstand voltage tests, power frequency The power frequency AC withstand voltage device is required for the AC withstand voltage test, and the frequency multiplying power supply is required for the frequency multiplied AC withstand voltage test), so if the above three insulation tests need to be completed at the same time, it will lead to a wide variety of test instruments and devices used, and the purchase High cost and occupy a large test site

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