Wired-loop-based entire-station monitoring and positioning system and positioning method for partial discharge

Abstract

The invention discloses a wired-loop-based entire-station monitoring and positioning system for the partial discharge of a transformer substation. The system comprises a high-frequency signal shielding bus. The two ends of the high-frequency signal shielding bus are connected to a dual-channel data acquisition and control unit respectively. N sensing terminals are connected in parallel with the high-frequency signal shielding bus through a three-way connecting piece. The system has the characteristics of high sensitivity and high anti-interference capability in terms of partial discharge detection, and the partial discharge of a plurality of pieces of power equipment of the transformer substation is synchronously monitored, so that the online monitoring cost of the partial discharge of the equipment of the transformer substation is greatly lowered, the mounting and use of online partial discharge monitoring equipment for a plurality of transformer substations is facilitated, shortcomings can be discovered in advance, power failure accidents are reduced, and the intellectualization level of the transformer substation is improved.

Description

technical field [0001] The invention relates to the technical field of signal monitoring and positioning, in particular to a measurement and positioning system for partial discharge pulse signals and a positioning method thereof, which can be used for synchronous on-line monitoring of partial discharge of power equipment in substations. Background technique [0002] As an important means of insulation diagnosis, partial discharge detection is being popularized by the power sector because it can reflect the insulation status of electrical equipment in the power system in a timely and effective manner. [0003] At present, the research on partial discharge monitoring and monitoring technology is basically carried out for specific power equipment in substations at home and abroad. The main detection principles and methods used include pulse current method, ultra-high frequency method (UHF), ultrasonic method, chemical method and optical method. Among them, the UHF method and th...

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Problems solved by technology

The inspection method cannot monitor the whole process of equipment operation because of its fixed detection and test cycle. In addition, the partial discharge live detection has high technical requirements for the measurement personnel, and the on-site judgment of the inspection personnel has a great influence on the detection results.

Online partial discharge monitoring equipment mainly adopts the principle of ultra-high frequency. The existing monitoring system structure is designed for a single power equipment. For partial discharge monitoring of multiple power equipment in substations, multiple sets of online monitoring systems need to be installed, and the cost of monitoring equipment is high. The maintenance workload of the monitoring device itself is also large

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