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One of the main objectives of smart grid is to have a reliable and efficient power network. For this to be possible, there is a need to make the distribution transformer smarter, which is one of the most important component of the smart grid system. This will require development of wide range of technologies. This paper describes the initiatives undertaken by ETEL Ltd, Auckland, New Zealand to develop...
To meet the needs of risk assessment of power transformer in power system, a condition assessment model of power transformer based on fuzzy evaluation method and information fusion technology is proposed in this paper. Typical parameters from preventative test and on-line monitoring are selected to evaluate operational condition of power transformer. The selected condition parameters are normalized...
Health Index (HI) technique is useful for maintenance strategy planning of transformers utilized in industrial sectors and electrical power systems. The conventional HI method requires many testing parameters to evaluate the transformer conditions. Therefore, it may lead to be an impractical task in many reality cases. Besides, some required testing parameters are not clearly defined. The aim of this...
The world of diagnostics has to keep up with the needs and possibilities today's world requires and offers. Everybody want the desired information in a cheap way and with minimum delay. The world of diagnostics is no different. Online diagnostic tools can cover these demands. Proper usage of tools like CBM (Condition Based Maintenance) can save us lots of money otherwise spend on unnecessary maintenance...
The world of diagnostics has to keep up with the needs and possibilities today's world requires and offers. Everyone want to have the information they desire at the moment and, of course, at minimal cost. The world of diagnostics is no different. One tool that offers that is the online diagnostics. It has many benefits that allow, with proper usage of tools like CBM (condition based maintenance),...
In this paper, the advanced application of intelligent substation condition monitoringsystem as the research background, the introduction of remote monitoring and diagnosissystem architecture center system, the equipment condition monitoring information in realintroduction to the equipment life cycle management, and property associated with the devicebody, will greatly enhance the accuracy of the...
The purpose structure of the Smart Grid within the industrial electric networks is proposed. The most important part of the intelligent systems for continuous control and diagnostics of the power transformers is mentioned. The paper considers functions of the systems for diagnostics of technical state of the high-voltage transformer equipment. Monitoring systems introduced at the power transformers...
The main objective of this article is to propose a methodology for prioritizing actions in predictive maintenance substation equipment, applied to Power Transformers, which are eventually responsible for the income revenue of energy companies (generation, transmission and distribution). This is a reflection on the failure analysis and risk management with optimal use of predictive maintenance, to...
Study on method of condition assessment of substation equipment is the key subject in condition maintenance. This article introduced the application of artificial intelligence methods in the substation equipment condition assessment and different artificial intelligence methods, such as artificial neural network (ANN), fuzzy theory and expert system, are introduced respectively, and their advantages...
The effective assessment on the operation condition of power transformer is an important means to conduct the condition maintenance for transformer and to improve the reliability of power system. Based on the amount of information of all kinds of online monitoring conditions obtained from the transformer intelligent components, the assessment model for comprehensive condition of transformer is established...
Much of the power system equipment in use today is nearing or has passed its predicted operating life, and we are pushing equipment to increasingly higher levels to meet demands. Injuries, failed equipment, unscheduled downtime, and loss of production are concerns that require knowledge of in-service power system apparatus. This is coupled with the competitiveness of the electrical energy market....
Evaluate power transformer's operating status correctly is a key issue to its reliable working and the maintenance policy. The Health Index (HI) represents a practical tool that provides the overall health of the asset, among which reasonably determine the weight of each index is the key to guarantee the quality evaluation. While in the current weight determination process, the method of professor's...
This paper introduced the concept of Proportional Hazards Model (PHM), it took advantage of the Weibull PHM to establish the failure rate model of transformer maintenance based on condition monitoring information. The failure rate threshold through the maximum availability method was determined, and then the maintenance decision model for the electric transformer was established. Finally, we used...
Transformers are a critical part of an electrical utility's asset base. Loss of a transformer in a utility, generation plant or process can cost many millions of dollars, depending on how long it is out-of-service. On-line monitoring and diagnostics is a useful tool to help operators to manage their assets and make decisions on continuing operation, maintenance or replacement. This paper illustrates...
San Diego Gas & Electric (SDG&E) has committed to the construction of a comprehensive Transmission and Distribution Substation Condition Based Maintenance (CBM) project. The ultimate objective of this project is to extend the useful life and make greater utilization of its Transmission and Distribution Substation Assets. The transformer is the most expensive and critical asset in the substation...
Chinese power industry developed rapidly recent years, and the problem of safety and reliability of power equipment is increasingly outstanding. The development of new test technology and the introduction of artificial intelligence (AI) are driving the monitoring and diagnosing method on insulation condition forward, and nowadays gradually changing the maintenance strategy from breakdown maintenance...
In this paper the basic management tools for asset and risk management were discussed. The structure and processes of asset management were shown. By the means of a risk matrix a good overview about the structure of the observed network is possible. For the equipment of high risk different measures can be applied to handle the risk. Besides preventing also reducing, transferring and finally accepting...
The need for improved performance of power systems in terms of reliability and higher productivity has necessitated more and more application of condition monitoring techniques, which can provide early warning of potential failure with the opportunity of organizing avoidance strategies to minimize loss of time and unexpected costs. Periodic condition monitoring tests have limitations such as continuous...
In order to take any proper maintenance actions the transformers conditions should be acquired. Since the transformer performance is limited by its main insulation condition, we focus on the thermal monitoring. As the transformer failure statistic rises, the root cause and ways to solve the problem should be found. Based on failure modes and effect analysis overloaded, external disturbances and ambient...
Transformers are one of some important equipments on electricity network. Each utility, in this case PLN P3B Jawa-Bali, has to assure their reliability in order to maintain electrical power system stability by assessing transformer conditions. Once transformer condition attained, appropriate maintenance and operation strategy can be defined. Based on failure investigation, transformer conditions are...
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