During the operation of power equipment, partial discharge is a “hidden killer” that must be guarded against. It is like a small “spark” inside the device, although initially weak, over time, it may cause serious insulation damage and even lead to equipment shutdown. How can we effectively detect and diagnose these ‘Mars’? This cannot be achieved without the contribution of the complete set of partial discharge equipment.
What is a complete set of partial discharge equipment?
Simply put, a complete set of partial discharge equipment is a system specifically designed to detect and analyze partial discharge phenomena in power equipment. It can accurately capture the weak electrical signals generated during device operation through various sensing technologies and data processing capabilities, and convert them into graphs and data that we can understand, thereby helping us determine whether the device has partial discharge problems and the severity of the problems.
Factors affecting partial discharge
To understand partial discharge, one must know which factors will “promote” its occurrence.
Defects in insulation materials: Air gaps, impurities, aging, etc. inside insulation materials are all hotbeds for partial discharge.
Electrical stress: High voltage or concentrated local electric field strength during equipment operation can easily cause insulation breakdown.
Environmental factors such as humidity, dust, and corrosive gases can all reduce insulation performance.
Equipment structure: Sharp corners of conductors, improper handling of joints, etc. may also cause electric field distortion.
The wisdom of monitoring tools
Under the research and development of professional institutions such as HV Hipot Electric Co., Ltd., we have acquired many advanced tools to combat partial discharge.
High sensitivity sensor: capable of capturing weak electrical pulses, sound waves, and even light signals.
Data acquisition and analysis system: Real time processing of collected signals, distinguishing different types of discharges, and providing diagnostic reports.
Signal processing technology: using advanced algorithms to eliminate interference and accurately lock the discharge source.
What fields are the partial discharge complete equipment related to?
The application scope of this device is very wide, covering almost all high-voltage electrical equipment:
Transformer: Monitor the condition of windings and insulation oil.
Cable: Check the integrity of cable joints and insulation layers.
Switchgear: Evaluate the performance of contacts and insulation components.
Generator: Ensure the insulation safety of the stator winding.
How can we do better?
To do better in the detection of partial discharge, we can start from the following aspects:
Regular testing and prevention: Do not wait for equipment problems to occur before checking. Regularly use partial discharge equipment for “physical examination” to prevent problems before they occur.
Data analysis and trend prediction: Conduct in-depth analysis of detection data, identify trends in equipment performance changes, and provide early warning.
Combining multiple diagnostic methods: Partial discharge detection can be combined with other diagnostic techniques (such as oil chromatography analysis, insulation resistance testing, etc.) to form a more comprehensive evaluation.
Pay attention to technological updates: With the development of technology, companies such as HV Hipot Electric Co., Ltd. continuously introduce more advanced testing equipment and methods, timely understanding and introduction, which can improve the accuracy and efficiency of testing.
frequently asked questions
What are the main parameters tested for partial discharge equipment? Mainly detect the discharge capacity (pC), discharge frequency, discharge phase, discharge type, etc. of partial discharge.
Why is partial discharge called the ‘invisible killer’ of power equipment insulation? Because it is very weak and difficult to detect in the early stages, but as it continues to develop, it will gradually damage the insulation and ultimately lead to equipment failure.
What should be noted when conducting partial discharge detection on site? It is necessary to ensure that the on-site environment is relatively quiet, avoid strong electromagnetic interference, and be operated by professional personnel.
How should the detection frequency of partial discharge be determined? It is usually determined comprehensively based on the operating years, importance, historical fault records, and environmental conditions of the equipment.
What other methods can be used to evaluate the health status of power equipment besides partial discharge equipment? Multiple methods such as insulation resistance testing, dielectric loss testing, and analysis of dissolved gases in oil can be used for comprehensive evaluation.