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Online Dissolved Gas Analysis Of Transformer Oil

Online Dissolved Gas Analysis Of Transformer Oil

Short Descrption for Online Dissolved Gas Analysis Of Transformer Oil

Online dissolved gas analysis of transformer oil is a cutting-edge technology that allows you to continuously monitor the health of your transformers in real-time. By analyzing gases dissolved in the oil, this online system detects incipient faults and helps prevent damage to the transformer insulation. It provides immediate alerts and enables you to make operational decisions without the need for manual oil sampling. With online DGA, issues can be identified in their infancy, avoiding unexpected failures and facilitating planned maintenance. This advanced monitoring system is a game-changer for ensuring the reliability and longevity of your valuable assets.

Detail description

Innovative & Advanced Features :

  • Color Touch Screen control with optional control over TCP-IP using FTP protocol.
  • Meets  ASTM D 3612  Section A or C or IEC 60567, 2005 Section 7.3 or 7.5 as required by the user.
  • 10 or 40  Vial Head Space Auto Sampler (Choice of Manual Head Space Sampling as per Section C / 7.5) .
  • Auto tuning PID temperature control for up to 8 channels with 2 programmable zones & 6 isothermal zones.
  • EPC for up to 8 channels with 2 programmable zones & 6 single set point control with 0.25 % FSD accuracy.
  • Up to 12 auxiliary device control with 4 step programming for control of GSV, Solenoids, Pumps, trigger, signals etc.
  • Input status for Pressure, Remote start, Remote Stop, Door open along with 4 additional spare inputs.
  • Programmable FID (Gain, Off Set, and Sensitivity – low, high) with time based sensitivity settings.
  • Programmable TCD (Sensitivity – Low, Medium, High) with superb current stability & repeatability.
  • Extensive Auto diagnostics & user friendly system control with User settable password protection. Multi mode screens with 6 pages of current status giving complete GC status with option for continuous looping of the system.

Revolutionizing Transformer Maintenance: Online Dissolved Gas Analysis of Transformer Oil

Transformers are the unsung heroes of our power infrastructure, silently stepping down voltage levels to ensure our homes and industries have access to electrical energy. However, these workhorses are not immune to wear and tear, and their health is critical to the stability of the grid. This is where online dissolved gas analysis of transformer oil comes into play, offering a sophisticated solution to monitor and maintain transformers efficiently and proactively.

The Power of Online Dissolved Gas Analysis

Online dissolved gas analysis (DGA) of transformer oil is an innovative and robust method for continuously assessing the condition of transformers. It involves the real-time analysis of gases that are dissolved in the transformer oil, enabling early detection of potential issues and allowing for preventive measures to be taken. This technology is a game-changer, and at the heart of this transformative process lies the Touch Screen GC System Model Dhruva S2TS, an NTPC and ERDA approved solution.

Customization to International Standards

One of the key advantages of the Dhruva S2TS is its versatility and adaptability. This cutting-edge equipment can be tailored to meet specific requirements and standards, such as ASTM D 3612 Section A or C and IEC 60567, 2005 Section 7.3 or 7.5. This adaptability ensures that the technology aligns perfectly with the needs of the user, making it a powerful tool for assessing and maintaining transformers of varying specifications.

Detecting Incipient Faults

The primary objective of online dissolved gas analysis is to identify incipient faults in transformers. By continuously monitoring the gases present in the oil, the technology can detect early signs of deterioration and damage to the transformer insulation. It’s akin to having a health monitoring system for your transformer, allowing you to diagnose issues at their infancy and take preventive action before they escalate.

Gas Chromatography: The Science Behind the Analysis

At the core of online DGA is gas chromatography, a sophisticated analytical technique that separates and identifies the gases dissolved in transformer oil. This method is the key to identifying incipient faults, providing a comprehensive view of the transformer’s condition. The significant gases generated by the decomposition of oil and paper insulation include hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide (CO), carbon dioxide (CO2), oxygen, and nitrogen. The concentrations of these gases can vary significantly based on the type and severity of fault conditions. Common fault conditions include arcing, partial discharge, overheating, and low-high temperature hot spots.

The Process: Separation, Identification, and Quantitative Determination

Online DGA involves a meticulous process of gas analysis. The technology extracts a sample of the transformer oil, separates the gases within the sample, identifies them, and quantifies their concentrations. The Dhruva S2TS performs all these tasks with impressive precision. With just a single injection of the oil sample, it provides a comprehensive analysis of the fault gases, with the specific gases analyzed depending on the user’s requirements.

The Advantages of Online Dissolved Gas Analysis

Now that we understand the technology and its components, it’s time to delve into the substantial advantages it offers. Online DGA is a proactive approach to transformer maintenance, and here are some of the key benefits it brings to the table.

Early Detection of Faults

The most significant advantage of online DGA is its ability to detect faults in their early stages. By continuously monitoring the gases within the transformer oil, it can identify the presence of fault gases as soon as they emerge. This early detection provides a significant window of opportunity for intervention and preventive maintenance.

Preventing Catastrophic Failures

Catastrophic failures of transformers can be costly and disruptive. They can result in extended downtime, expensive repairs, and even damage to surrounding equipment. Online DGA acts as an early warning system, helping to prevent such catastrophic failures by detecting issues well before they reach a critical stage.

Data-Driven Decision-Making

Online DGA offers a data-driven approach to maintenance. The continuous monitoring and data collection provide valuable insights into the transformer’s condition. Asset owners and maintenance teams can make informed decisions based on real-time data, ensuring that resources are allocated effectively and maintenance efforts are focused on transformers that need attention.

Reduction in Maintenance Costs

By addressing issues in their early stages, online DGA helps reduce overall maintenance costs. Preventive maintenance is typically less expensive and disruptive than corrective maintenance after a catastrophic failure. This technology also helps extend the lifespan of transformers, reducing the need for premature replacements.

Improved Reliability

A reliable power supply is essential for homes, industries, and businesses. Online DGA enhances transformer reliability by minimizing unplanned outages and ensuring that transformers operate within safe and efficient parameters.

Real-Time Insights

The Dhruva S2TS, in particular, offers the advantage of real-time insights. It provides near-instantaneous data on fast-developing faults, allowing for rapid responses to emerging issues. This rapid mode ensures that asset owners and maintenance teams are always one step ahead when it comes to transformer health.

Compatibility with Various Insulating Oils

Transformers use various types of insulating oils, from traditional mineral oils to newer ester-based fluids, both natural and synthetic. Online DGA is compatible with these different oil types, ensuring its applicability across diverse transformer configurations.

Enhanced Monitoring Solution

The combination of enhanced computing power, highly scalable I/Os, and integrated human-machine interface (HMI) in the Dhruva S2TS creates a powerful and flexible transformer monitoring solution. This combination streamlines data collection, analysis, and reporting, making it a comprehensive and user-friendly platform.

Applications and Impact

Online dissolved gas analysis has a profound impact on the management of transformer assets. Its applications extend to various scenarios and industries, and its implementation has the potential to enhance overall grid reliability.

Monitoring Transformer Bushings

One critical application is the continuous monitoring of transformer bushings. Bushings are under constant high stress due to line voltage and the heat generated by current flow. They are susceptible to various stressors, including manufacturing defects, aging, thermal cycling, pollution, and external flashovers. These stressors can lead to bushing insulation deterioration. If left undetected, this deterioration can result in catastrophic failures, including explosions, oil fires, and damage to the transformer. Online DGA offers a proactive approach to bushing health monitoring, ensuring that potential issues are identified and addressed before they become critical.

Detection of Partial Discharge

Partial discharge (PD) is a localized breakdown in the insulation system of transformers. It can lead to gradual erosion of the insulation and eventual failure. Online DGA, in combination with the Dhruva S2TS, offers the advantage of measuring high-frequency signals to monitor PD activity. This added layer of protection ensures the safety and integrity of the transformer’s main tank.

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IndiaUnited Arab EmiratesUganda
NepalIsraelTanzania
VietnamEgyptAngola
PhilippinesYemenKambia
IndonesiaTurkeyMalawi
MalaysiaSudanBotswana
South KoreaAlgeriaSouth Africa
OmanMonacoZimbabwe
IranNigeriaCambodia
Saudi ArabiaEthiopiaAustralia
NamibiaGreeceUSA

Advantages of Online Dissolved Gas Analysis of Transformer Oil

Online dissolved gas analysis (DGA) of transformer oil is a powerful tool that offers numerous advantages for asset owners and maintenance teams. This technology revolutionizes transformer maintenance by providing real-time insights, early fault detection, and data-driven decision-making. Let’s delve into the significant benefits of implementing online DGA for transformer oil analysis:

1. Early Fault Detection

The most prominent advantage of online DGA is its ability to detect faults in their early stages. By continuously monitoring the gases within the transformer oil, it can identify the presence of fault gases as soon as they emerge. This early detection provides a significant window of opportunity for intervention and preventive maintenance. It enables asset owners to address issues before they escalate into catastrophic failures, thereby minimizing downtime and repair costs.

2. Preventing Catastrophic Failures

Catastrophic failures of transformers can be costly and disruptive. They can result in extended downtime, expensive repairs, and even damage to surrounding equipment. Online DGA acts as an early warning system, helping to prevent such catastrophic failures by detecting issues well before they reach a critical stage. This proactive approach safeguards both the transformer and the reliability of the electrical grid.

3. Data-Driven Decision-Making

Online DGA offers a data-driven approach to maintenance. The continuous monitoring and data collection provide valuable insights into the transformer’s condition. Asset owners and maintenance teams can make informed decisions based on real-time data, ensuring that resources are allocated effectively and maintenance efforts are focused on transformers that need attention. This not only improves the efficiency of maintenance operations but also leads to cost savings.

4. Reduction in Maintenance Costs

By addressing issues in their early stages, online DGA helps reduce overall maintenance costs. Preventive maintenance is typically less expensive and disruptive than corrective maintenance after a catastrophic failure. This technology also helps extend the lifespan of transformers, reducing the need for premature replacements. The financial benefits of early fault detection and preventive measures are substantial.

5. Improved Reliability

A reliable power supply is essential for homes, industries, and businesses. Online DGA enhances transformer reliability by minimizing unplanned outages and ensuring that transformers operate within safe and efficient parameters. Reliability is crucial for preventing disruptions and maintaining the trust of customers who rely on a consistent power supply.

6. Real-Time Insights

The ability to provide real-time insights is a game-changer in transformer maintenance. The Dhruva S2TS, in particular, offers the advantage of real-time data. It provides near-instantaneous information on fast-developing faults, allowing for rapid responses to emerging issues. This rapid mode ensures that asset owners and maintenance teams are always one step ahead when it comes to transformer health.

7. Compatibility with Various Insulating Oils

Transformers use various types of insulating oils, from traditional mineral oils to newer ester-based fluids, both natural and synthetic. Online DGA is compatible with these different oil types, ensuring its applicability across diverse transformer configurations. This compatibility makes the technology accessible and valuable for a wide range of transformer installations.

8. Enhanced Monitoring Solution

The combination of enhanced computing power, highly scalable I/Os, and integrated human-machine interface (HMI) in the Dhruva S2TS creates a powerful and flexible transformer monitoring solution. This combination streamlines data collection, analysis, and reporting, making it a comprehensive and user-friendly platform. The user-friendly interface and powerful computing capabilities ensure that users can harness the full potential of online DGA without facing significant technical challenges.

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