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Insulation technology of high voltage electrical equipment is a must be used in high voltage electrical equipment, the use of high-voltage electrical equipment insulation technology can ensure the safety and stability of power equipment supply. In the power supply, the application of high voltage electrical equipment insulation technology should be used to detect the operation of equipment. Therefore,...
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...
Oil-filled ring main units (RMUs) are considered to pose a medium to high medium risk due to the severity of failure consequences and the ageing population. The obvious solution is to institute a network wide replacement program of oil-filled RMUs with the newer types of RMUs. However, a replacement program covering the total population of tens of thousands will take significant capital expenditure...
For a world class city like Hong Kong, reliable electricity supply is essential to business and to maintain good quality of life. To meet the community's expectation for high electricity reliability and to ensure the healthiness of the equipment, refurbishment and maintenance regime has been migrating from conventional time based preventive maintenance to reliability centered maintenance aided by...
The loss of insulation capacity caused by pollution deposition on insulator strings can be inferred from the analysis of the electric arcs due to partial discharges on the insulators. The partial discharges also cause pulses superposed to the leakage current signal. An optical sensor system network was developed and installed in the northeast region of Brazil to monitor the degree of pollution deposited...
Operating distribution networks in southern region of Iran located in northern coasts of Persian Gulf and Oman Sea requires special conditions. Environmental conditions like high temperature and humidity, Sunlight severity, very low raining, Obstacles in the air in addition with conditions like high energy consumption per capital, fast growth of energy demand because of new air conditioning systems...
Motivated by the increasing use of condition monitoring technology for electrical transformers, this paper deals with the optimal replacement of a system having a hazard function that follows the proportional hazards model with a semi-Markovian covariate process, which we assume is under continuous monitoring. Although the optimality of a threshold replacement policy to minimize the long-run average...
High-power electrical machines employed in mining and power generation are critical systems that require (long lifetime) high reliability and availability. That is why proper specification, design, operation and maintenance are needed together with condition monitoring and diagnostics. Concerning the application, it must be considered a comprehensive system design, including manufacturing, testing,...
Benchmarking of electric motors can reveal deterioration of the motor's performance characteristics, allowing the opportunity to schedule corrective action, thus minimizing unscheduled downtime and repair costs. In the event of a failure, benchmarking records can offer clues as to the root cause of the failure. The benchmarking process should be on-going throughout the life of the motor. It should...
Condition-based maintenance for turbine generators (TG) is given in the paper. Defects in stator winding and in magnet core are determined before repair on the basis of double-coordinate on-line discharge events location. Full information about ground wall semiconductivity layer in bars, slot discharges, sparking between plates in magnet core are provided by generators measurements operating load...
To ensure economic operation of high voltage equipment, reliable condition evaluation concepts are essential. They enable long-term inspection strategies with regard to a maximized service life of each component. Condition based maintenance (CBM) is therefore desirable and it is already used more and more in practice. Monitoring and diagnostic systems are on the way to get important tools for modern...
The following topics are dealt with: distribution systems; renewable energy; hydroelectric power plants; power system reliability; machine control; neural networks; energy storage; power transmission lines; power system protection; energy management system; power system restoration; wide area monitoring; SCADA system; electric machines; electric drives; microcomputers; energy consumption; lighting;...
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...
In the past decade, CLP Power Hong Kong Limited (CLPP) has initiated the application of a series of condition monitoring techniques on its power equipment so as to allow progressive change of its equipment maintenance strategies from time-based preventive tasks to more condition-based predictive tasks. The data collected from the HV GIS, cables and overhead lines form useful information in maximizing...
Currently, the evaluation of the aging process of HV assets becomes of high strategic importance, where technical aspects as well as economical and social issues have to be taken into consideration. After a general review of the information strategy applied for reliability-centered maintenance (RCM) the submitted paper deals more in detail with an advanced tool for computer-based PD monitoring of...
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