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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.

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2018

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The inaugural "OUMIAO Cup" Fun Sports Meet Successfully Held

The inaugural "OUMIAO Cup" Fun Sports Meet Successfully Held

To strengthen the sense of team spirit within the OUMIAO family and enrich everyone’s leisure time, while actively responding to the call for nationwide fitness, the first "OUMIAO Cup" Fun Sports Meet was successfully held on the afternoon of June 1, 2018, under clear skies with gentle breezes, blue skies, and fluffy white clouds, at the Xujing Town Cultural and Sports Activity Center in Qingpu District.

13

2018

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06

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.

29

2018

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Performance and Features of SF6 Density and Moisture Levels

Performance and Features of SF6 Density and Moisture Levels

SF6 density and moisture measurement utilizes a genuine imported humidity sensor as the humidity-sensitive element. When trace amounts of moisture in the gas being measured enter the sensor's sampling chamber, water vapor is adsorbed into the sensor's micropores, causing a change in its capacitive reactance. The sensor then amplifies this subtle change and converts it into a standardized, linear electrical signal, which is processed by a microprocessor before being displayed on the LCD screen.

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2018

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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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