Partial discharge synchronous monitoring method for multiple electrical equipment of substation

Abstract

The invention discloses a partial discharge synchronous monitoring method for multiple electrical equipment of a substation. The partial discharge synchronous monitoring method comprises the following steps of: arranging a high-frequency shielding bus ring; arranging a plurality of splicing joints on the high-frequency shielding bus ring; correspondingly mounting a plurality of sensing terminals which transmit data to the high-frequency shielding bus ring in a one-way manner to the electrical equipment in the substation respectively; connecting a single-channel data acquiring unit and the high-frequency shielding bus ring so that partial discharge signals monitored by the sensing terminals are respectively transmitted to the single-channel data acquiring unit along the high-frequency shielding bus ring through a first path and a second path; setting the length difference between the first path and the second path which correspond to the splicing points into different values so as to generate different time differences; and positioning the partial discharge signals according to the different time differences. The monitoring method is easy to operate and convenient to debug; omnibearing, on-line and synchronous monitoring on the electrical equipment required to be monitored in the whole substation is realized by low cost and high accuracy; and insulation defects of the electrical equipment can be timely found out and eliminated, so that safety running of the whole substation is guaranteed.

Description

technical field [0001] The invention relates to a monitoring method, in particular to a monitoring method for partial discharge signals. Background technique [0002] As an important means of insulation diagnosis, partial discharge detection is widely used in the power field because it can reflect the insulation status of electrical equipment in the power system in a timely and effective manner. At present, domestic and foreign researches on partial discharge monitoring and monitoring technology are basically aimed at specific power equipment in substations. The main detection principles and methods used include pulse current method, ultra high frequency (UHF, Ultra High Frequency) method, ultrasonic method , chemical method, optical method, etc. Among them, UHF method and ultrasonic method are more practical and feasible methods. [0003] Usually, the partial discharge monitoring and positioning of substation equipment is mainly carried out for specific single equipment su...

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Problems solved by technology

However, since the sensor receiving the discharge signal is set far away from the device under test, and the discharge signal will continue to attenuate in the air, this method is only suitable for relatively obvious partial discharge monitoring and positioning

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