Comprehensive monitoring system for electric power system transformers

Abstract

A comprehensive monitoring system for electric power system transformers comprises an IEC61850-based unified modularized CPU (central processing unit) hardware platform, a sensor, a system terminal, at least one of nine monitoring logical devices, and further comprises an expert analysis system, including a thermal management mathematical model and an oil and gas analysis mathematical model, wherein by configuring and starting software, a function for monitoring corresponding LDs (logical device) which are independent of one another is achieved; and by performing independent effective data acquisition on the transformers respectively, and integrating and processing the data by the CPU, the electric power system transformers are comprehensively monitored in a configurable way. The comprehensive monitoring system for the electric power system transformers is convenient and flexible in application; current situations of repeated data acquisition, and shortage of data integration, data processing, information exchange and information sharing are changed; conversion from the conventional mechanism-based timed maintenance to the state-based preventative maintenance is facilitated; the maintenance cost is obviously saved; service lives of the transformers are prolonged; and a customer can obviously reduce the purchase cost and the management cost.

Description

technical field [0001] The invention relates to transformers, in particular to a comprehensive monitoring system for power system transformers. Background technique [0002] Transformer online monitoring Monitoring is the only way to detect transformer faults early and timely, and realize condition-based preventive maintenance. With the development of smart grid, the online monitoring equipment of transformer will become more and more important. In existing traditional substations, the monitoring devices of high-voltage transformers include many smart devices with different functions. These smart devices are usually provided by different manufacturers and operate independently, which not only increases the purchase cost of users, but also brings a lot Inconvenient, significantly increased management costs. At present, there is no cooling control logic device (Logical Device, abbreviated as LD), winding hot spot temperature measurement LD, electrical quantity recording LD, ...

AI Technical Summary

Problems solved by technology

In existing traditional substations, the monitoring devices of high-voltage transformers include many smart devices with different functions. These smart devices are usually provided by different manufacturers and operate independently, which not only increases the purchase cost of users, but also brings a lot Inconvenient, significantly increases management costs

At present, there is no cooling control logic device (Logical Device, abbreviated as LD), winding hot spot temperature measurement LD, electrical quantity recording LD, non-electrical protection monitoring LD, iron core grounding current monitoring LD, bushing insulation monitoring LD, The functions of on load tap changer (On Load Tape Changer, abbreviated as OLTC) monitoring LD, dissolved gas monitoring LD in oil and partial discharge monitoring LD (hereinafter referred to as transformer monitoring LD) are integrated in a unified CPU hardware platform, according to The international standard IEC61850 issued by the International Electrotechnical Commission (International Electrotechnical Commission, abbreviated as IEC) is applied to the substation communication network and system. Unified modeling, in order to realize the comprehensive monitoring of power system transformers

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