Disconnection-free testing method for high voltage electric equipment in transformer substation

Abstract

The invention provides a disconnection-free testing method for high voltage electric equipment in a transformer substation. The method includes steps of a, cutting off power of the equipment in the transformer substation, disengaging a switch on a grounding side of a circuit breaker and engaging the circuit breaker, disengaging a neutral point grounding switch of a voltage transformer, disengaging a voltage transformer side switch, moving a handcart in a switch chamber to an operation position and disengaging the grounding switch; b, measuring the integral resistance of all the equipment; c, connecting a DC leaking equipment to a high voltage side single-phase conductor of a main voltage transformer, boosting voltage slowly after wiring, maintaining for one minute after the voltage is boosted for 1 / 10 each time during the boosting process, reading the leaking current value until the leaking current value lasts for one minute in a full voltage condition; d, drawing a volt-ampere characteristic curve according to the read voltage, current and time. Since the above technical scheme is adopted, the testing duration can be reduced effectively and the working efficiency is improved. The testing demand for saving the equipment disconnection process is realized, the line power-off time is reduced and great social benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of electric high-voltage tests, in particular to a test method for non-dismantling joints of high-voltage electrical equipment in substations. Background technique [0002] It is a mandatory requirement that the primary equipment in the substation must be periodically subjected to preventive tests. Electrical equipment in a substation such as transformers, transformers, circuit breakers, knife switches, and lightning arresters are connected by power cables, metal wires, and metal busbars. According to the conventional test method, the connection part must be removed or the knife switch must be disconnected to become an independent individual before the high-voltage test can be carried out. Due to the large workload of the joints, it is easy to cause untimely recovery and poor crimping to cause heat and other faults to burn electrical equipment. Contents of the invention [0003] The technical problem to be solved ...

AI Technical Summary

Problems solved by technology

Due to the large workload of joints, it is easy to cause untimely recovery and poor crimping to cause heat and other failures to burn electrical equipment.