Power Sector Performance Still hampered by Transformer Monitoring Inefficiencies - Vaisala
GlobeNewswire
Cutting costly false alarms and increasing the reliability of DGA monitoring will be crucial to tackling long-term maintenance budget overruns and boosting asset performance
Advanced dissolved gas analysis (DGA) methods are commonly used for assessing large power transformers in the international power generation and transmission sector. However, there is still scope for improvement to their reliability and cost-effectiveness.
Vaisala, a global leader in environmental and industrial measurement, has highlighted that false alarms from on-site DGA systems and errors during routine oil inspections still pose challenges for asset owners. Utilities can tackle these issues with solid real-time condition monitoring, which leads to reduced maintenance costs, and to improved grid reliability and financial performance.
Reducing the Probability of Error
Vaisala Optimus DGA can be installed in less than two hours. California, USA
The financial severity of transformer failure is well known to the industry. An extensive service costs more than €100,000, while a replacement transformer can cost up to €4 million. Associated loss of production can further increase these figures.
As a result, online DGA condition monitoring is becoming standard practice for aging transformer fleets. It enables proactive diagnosis and mitigation of developing faults before they lead to costly downtime. However, streamlining monitoring procedures and reducing the probability of errors is highly important.
False alarms from on-site DGA monitors disrupt utilities` maintenance schedules and generate unforeseen costs. In addition, the need to validate on-site data via regular laboratory sampling increases the complexity and duration of the testing process.
Combined, these factors highlight a growing requirement for a dependable DGA monitor that not only provides 24-hour real-time online access to critical performance data, but also eliminates false alarms and cuts potential error. Vaisala`s Optimus (TM) DGA Monitor for Transformers, unveiled to the European market at CIGRE 2016 in Paris, has been specifically designed to fulfill this requirement.
Fully Dependable Real-time Monitoring
The robust plug-and-play Optimus (TM) DGA monitor can be installed in under two hours, and uses partial vacuum gas extraction to provide a fully representative sample of all dissolved gases in the transformer oil. Readings taken by the built-in infrared sensor are unaffected by oil temperature, pressure or type, and the system regularly auto-calibrates to provide fully consistent and dependable data. This data is available via an online interface, allowing continuous, reliable, real-time analysis of transformer performance - without false alarms.
"In the not-so-far future, online DGA monitors will be deployed as standard equipment on all large transformers," said Dr Michel Duval, a world-renown leader in the field of DGA, speaking to Vaisala about transformer monitoring procedures. Dr Duval has been the chairman of several CIGRE working groups on DGA since 1997. "This will open the door to automated monitoring of the grid and, ultimately, the development of smart grids with computer-assisted decision-making," he continues.
"I personally believe that vacuum gas extraction is the best way to separate gases from the transformer oil for analysis, and gives the most reliable results," Michel Duval stated.
"Rigorous condition monitoring via DGA is the only way to proactively keep on top of transformer performance - particularly as the operational transformer fleet ages," said Juhani Lehto, Product Manager at Vaisala. "However, the data collected must be dependable, if we are to detect all potential faults in advance, or reliably determine whether it is worth sending out a maintenance and inspection team."
Vaisala`s Optimus (TM) DGA Monitor for Transformers will be on display at CIGRE 2016 in Paris this week, stand 118. Welcome to meet our experts there!
For More Information
Juhani Lehto, Product Manager, Vaisala +358 50 371 1398 juhani.lehto@vaisala.com
Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Our instruments and systems are used in over 150 countries in demanding industries, including airports, pharmaceuticals, and power generation. Vaisala sensors are used in the harshest places on earth - arctic, maritime, and tropical environments - and even on Mars. Headquartered in Finland, Vaisala employs approximately 1,600 professionals worldwide and is listed on the NASDAQ Helsinki stock exchange. www.vaisala.com www.twitter.com/VaisalaGroup
For power generation and transmission industry, Vaisala provides unique measurement equipment for online monitoring of transformer insulation oil. Our reliable solutions support in planning and optimizing the preventive maintenance of power transformers, and thus help to extend their lifetime and reduce the risk of unexpected and costly outages.
This announcement is distributed by NASDAQ OMX Corporate Solutions on behalf of NASDAQ OMX Corporate Solutions clients.
The issuer of this announcement warrants that they are solely responsible for the content, accuracy and originality of the information contained therein. Source: Vaisala Oyj via GlobeNewswire HUG#2036163
