thisDeveloped by the companyGISPartial discharge online monitoring system, used for online monitoring of ultra-high frequency partial discharge. The system consists of ultra-high frequency sensors, on-site acquisition units, and a backend diagnostic platform.

UHF (Ultra High Frequency)sensor：detectionGISWait for the internal insulation partial discharge signal of high-voltage equipment, and send the signal to the local acquisition unit through coaxial cable.

On site collection unit：Denoising, filtering, and identifying signals, and using optical fibers/The network cable sends the results to the backend diagnostic platform；

Backend diagnostic platform：The online monitoring system communicates with the on-site acquisition unit to diagnose and locate partial discharge signals, and generate alarm signals. Realize synchronous display of on-site monitoring data in the main control room or remote dispatch center.

The necessity of installing a partial discharge online monitoring system:

1. Current situation description:

In the past, it was widely believed thatGISBelonging to equipment that does not require maintenance or has a long maintenance cycle, but from a recent perspective40Based on years of operating experience, insulation faults have always been an impactGISOne of the important factors of reliability.1998yearCIGREStatistically analyzed overseas1967Year to Year1992All yearsGISInsulation failure rates, all of which exceedGISInsulation requirements0.1time/The indicator of (hundred year interval), and with the increase of voltage level, the insulation failure rate gradually increases.

Considering the above statistical situation, it indicates thatGISIt is particularly important to detect and determine the internal defect status before a malfunction occurs, and to predict it in advance.

2. Expected project objectives:

This project is committed to improving the efficiency of core production business and reducing the cost of production maintenance work, thus enhancing management, social, economic and other benefits through various applications.

1)In terms of management efficiency:

The research and promotion of this project will comprehensively enhance the management level of power equipment, laying a solid foundation for further implementation of condition based maintenance in power plants; The system adopts comprehensive integrated management, which can achieve comparative analysis of various detection data and feature maps at different time points in the same interval and at the same time point in different intervals, thus achieving standardization of monitoring data, facilitating process oriented and unified management, and further improving the management efficiency of the company.

2)In terms of economic benefits:

Through the online monitoring system for partial dischargeGISUnderstanding and mastering the operating status of equipment can evaluate its performance, service life, and utilization level, in order to arrange maintenance strategies reasonably. At the same time, it can greatly reduce the workload of on-site inspection personnel and greatly reduce the company's expensesGISMaintenance cost; The research results of this project will be directly used to strengthen the refined management of production management, further improve the efficiency of production operation and maintenance, and throughGISComprehensive evaluation of equipment operation status, changing the original periodic maintenance method; Thereby improving economic efficiency. Our company's online monitoring system for partial discharge can monitor in real-timeGISBy monitoring the partial discharge of high-voltage electrical equipment during operation, timely warnings can be given for insulation abnormalities and discharge faults, providing necessary guidance for the normal operation of equipment, improving the reliability and safety of power system operation, and contributing important forces to creating a harmonious and stable society.