Test system for simulating operation of lightning arrester based on vacuum gap

Abstract

The invention discloses a test system for simulating the operation of a lightning arrester based on a vacuum gap. The test system comprises a lightning generator, a voltage divider, test equipment, a Rogowski coil and a vacuum breakdown gap, wherein the high-voltage end of the lightning generator is connected with the high-voltage end of the voltage divider, the high-voltage side of the test equipment and the anode of the vacuum breakdown gap, the cathode of the vacuum breakdown gap is connected with the low-voltage side of the test equipment, the low-voltage end of the voltage divider and the grounding end of the lightning generator, and the Rogowski coil is sleeved on the grounding end of the lightning generator. The system can simulate the operation test of the lightning arrester, is lower in test cost, and consumes less electric energy of a power supply.

Description

technical field [0001] The invention belongs to the technical field of high-voltage equipment testing, and relates to a vacuum gap-based operating test system for simulating arresters. Background technique [0002] IEC 62271-111-2012 standard, dealing with high-voltage switchgear and controlgear Part 111, Overhead, base-mounted, dry basement and wetted circuit reclosers and fault circuit interrupters for AC systems up to 38kV. This standard stipulates the simulated operation test of the arrester, figure 1 It is about the layout of the surge test circuit. The test uses an impact generator to generate high-voltage pulses to load the test object port. After the ball gap breaks down, a large current specified in the standard is generated to realize the assessment of the high-voltage breakdown process and the impulse current process of the test product. [0003] With the promotion of the primary and secondary integration of the power system, and the development and application ...

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Problems solved by technology

[0004] At present, under the experimental method stipulated in the standard, based on the lightning impulse generator equipped in the test station, it is difficult to generate the corresponding experimental current conditions. The arc voltage is high, and there is a strong current limiting effect, which limits the expected current amplitude and leading edge speed output by the generator. In other words, the air arc consumes most of the power supply energy. At this time, in order to achieve the expected experimental current conditions, must Large-scale expansion of power supply capacity will not only increase the cost of the device, but also intensify the arc wear of the trigger unit of the generator. Economic and technical aspects limit the development of this type of experiment. Therefore, only a few foreign test stations such as KAMA in the Netherlands can carry out it. This kind of experiment has not been reported in this aspect in China

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