Novel device for detecting turn-to-turn insulation of dry-type hollow electric reactor

Abstract

The invention relates to a novel device for detecting turn-to-turn insulation of a dry-type hollow electric reactor. The device is characterized by comprising a voltage boosting and stabilizing device and a current-limiting resistor, wherein the voltage boosting and stabilizing device is used for boosting and stabilizing an input voltage and then supplying power to a pulse detection device through the current-limiting resistor; the pulse detection device comprises an experimental capacitor, one end of the experimental capacitor is connected with the ground and the other end of the experimental capacitor is connected with the current-limiting resistor; a sphere gap is connected in parallel with the experiment capacitor after being connected in series with a voltage divider; and the electric reactor is connected in parallel with the voltage divider during the testing. The device is characterized in that the voltage boosting and stabilizing device comprises a voltage regulator, wherein the input terminal of the voltage regulator is connected with an alternating current power supply and used for regulating the alternating current power supply; the output terminal of the voltage regulator is connected with a boosting transformer; the boosting transformer is used for boosting the voltage of the alternating current power supply after voltage regulation and outputting a high-voltage current; the high-voltage current is sent into a voltage doubling tower to be boosted so as to form a rated experimental voltage; and the boosting transformer and the voltage doubling tower are connected with the ground together. According to the device provided by the invention, the detection accuracy is greatly improved.

Description

technical field [0001] The invention relates to a reactor turn-to-turn insulation monitoring device, in particular to a dry-type air-core reactor turn-to-turn insulation detection device. Background technique [0002] Large air-core power reactors play an indispensable role in reactive power compensation and high-voltage insulation coordination. Most reactors are formed by stacking several coil windings, and each winding is formed by parallel connection of several thick conductors insulated from each other. The reactor works in a high-voltage environment for a long time, and the current is large, and the heat is significant. Therefore, reactors often have partial discharges, winding overcurrent fuses and other faults. These failures seriously affect the safety and stability of the power system. [0003] Existing literature shows that power reactor fault detection methods include: resistance value and reactance value measurement method, current measurement method, temperat...

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Problems solved by technology

[0007] At present, some units at home and abroad have developed and produced some different types of inter-turn insulation fault detection devices for dry-type reactors, but their performance often fails to meet the requirements of relevant standards, mainly in the number of discharges per second of the tested dry-type reactors. Failure to meet the requirements of relevant standards, the test voltage is not high enough, the expected test results cannot be achieved, the experimental data is not credible, and it is easy to cause incorrect judgment of the inter-turn insulation status of the dry-type reactor; and the volume and weight of the test equipment are too large, which is very Difficult or impossible to enter the substation field test

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