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Transformer Partial Discharge Online Monitoring and Fault Diagnosis System

Transformer Partial Discharge Online Monitoring and Fault Diagnosis System

Transformer aging and internal defects can lead to transformer failures. By analyzing the ultra-high-frequency signals generated during partial discharge detection, the MRGuard-TR1000 is capable of identifying various internal defects in transformers and issuing alerts. Through continuous classification and analysis of partial discharge signals, it can also send GIS alarm notifications to users via email and SMS.

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2018

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09

Methods for Detecting Partial Discharges

Methods for Detecting Partial Discharges

Partial discharge refers to the phenomenon where, in electrical equipment, an applied voltage generates an electric field strong enough to cause discharge in localized insulation areas—but without forming a stable, continuous discharge channel within those regions. This type of discharge is primarily observed in high-voltage equipment.

13

2018

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09

Overhead Transmission Line Protection Against External Damage

Overhead Transmission Line Protection Against External Damage

In 2016, just recently concluded, State Grid Shouguang City Power Supply Company successfully achieved its annual goal of "zero external damage" to transmission lines rated 220 kV and above that cross the city limits. Over the past year, the company's employees—both management and frontline staff—have remained steadfastly committed to safeguarding these critical transmission lines, braving extreme cold, scorching heat, wind, frost, rain, and snow alike. With unwavering dedication and tireless effort, they’ve effectively neutralized every potential threat of external damage, ensuring uninterrupted power supply and protecting the community’s reliable access to electricity.

16

2018

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08

On-site Application of Partial Discharge Detection Technology in Gas-Insulated Switchgear (C-GIS)

On-site Application of Partial Discharge Detection Technology in Gas-Insulated Switchgear (C-GIS)

C-GIS is the result of combining GIS technology with switchgear technology, also known as gas-insulated switchgear. C-GIS features a cabinet-style enclosure, housing three-phase high-voltage components within a welded steel box equipped with internal partitions. The interior of the box is filled with SF6 gas at a pressure slightly higher than atmospheric pressure, serving as the insulating medium. Thanks to its robust design, C-GIS is not limited by external environmental conditions and can operate reliably even in harsh settings. Currently, major international manufacturers offer C-GIS products across voltage levels ranging from 12 to 126 kV, with particularly diverse product offerings available for the 12–72.5 kV range.

01

2018

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06

Principles and Characteristics of Partial Discharge Detection Methods

Principles and Characteristics of Partial Discharge Detection Methods

Radio Frequency Scanning (RFS) is a non-invasive, live-testing method that detects partial discharge-generated electromagnetic signals by capturing them via an antenna in the air around the inspection area. Based on the selected frequency range and the level of electromagnetic signals, it produces a comprehensive graphical representation, enabling real-time measurement of the electromagnetic signals emitted by discharge defects. Theoretically, this method can effectively identify defects in any substation.

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2018

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05

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SHANGHAI OUMIAO ELECTRIC&INSPECTION CO.,LTD.

Specializing in online monitoring systems for GIS, transformers, switchgear, and high-voltage cables

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