On-line monitoring device for turn-to-turn insulation of dry-type reactor

Abstract

The invention provides an on-line monitoring device for turn-to-turn insulation of a dry-type reactor. The device comprises an induction coil wound at the end part of a dry-type reactor and a detectorconnected with the induction coil. The detector comprises a sampling module, a wireless transmission module, a power supply module and a lightning protection device. The dry-type reactor comprises abus connected to the dry-type reactor and an electricity taking mutual inductor connected with the power supply module and arranged on the bus, and the detector is fixed on the bus. The detector is further provided with a matched wireless receiver, the signal output of the wireless receiver is connected to a line concentration exchanger through a signal line, the line concentration exchanger is connected with a monitoring terminal through a signal line, and the line concentration exchanger is further connected with an open-circuit control terminal of the dry-type reactor through a signal line.According to the invention, the turn-to-turn insulation of the dry-type reactor can be monitored in real time in a transformer substation, the early stage and mature stage of a turn-to-turn short circuit accident can be completely monitored, dual monitoring is realized, and monitoring misunderstanding is avoided.

Description

technical field [0001] The invention relates to the field of diagnosis of dry-type reactors, in particular to an on-line insulation monitoring device for dry-type reactor turns. Background technique [0002] Dry-type reactors are important reactive power compensation equipment in power systems. The quality of dry-type reactors in the market is uneven, and the maintenance is not in place. Accidents of reactor burnout are common. The reasons are mostly: improper insulation treatment, encapsulation cracks, water ingress, and insulation aging, and finally a short circuit between the turns of the dry-type reactor, causing the product to burn, so it is necessary to monitor the inter-turn insulation of the dry-type reactor. [0003] At present, there are mainly the following types of inter-turn insulation monitoring devices for dry-type reactors: [0004] 1. Test device after the dry-type reactor is out of operation [0005] After the dry-type reactor is out of operation, the int...

AI Technical Summary

Problems solved by technology

On the one hand, this method requires inspectors to operate close to the reactor, which does not comply with the substation safety operation regulations when the dry-type reactor is running; on the other hand, this method requires three-phase data analysis and comparison, considering that three-phase reactors exist at the same time In the event of a fault, the accuracy of the acquisition method cannot be guaranteed when the three-phase data is inaccurate; finally, when the dry-type reactor is faulty, it is even impossible to send a disconnection signal to the dispatching system to take the faulty reactor out of operation

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