نتایج جستجو برای: power quality events
تعداد نتایج: 1500559 فیلتر نتایج به سال:
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45 eregulation of the energy market is bringing about a fundamental change in the way power equipment assets have to be operated, maintained and replaced. High power-equipment performance is key to cost-efficient energy trading and to the success of the efforts being made by utilities to satisfy end-user demand for high power quality . Three main trends are shaping power equipment life manageme...
In recent years, power quality measurements are one of the research topics of the Instrumentation and Measurement Group of Instituto de Telecomunicações. This paper summarizes the latest achievements. The paper describes the proposed algorithms for detection and classification of power quality disturbances and the new measuring instruments that were developed.
Integrating wind power generation into small islands has been one of the demonstration projects in Okinawa Prefecture, Japan. Since such integration could deteriorate power quality, including frequency, in an island grid, a frequency-stabilizing system using flywheels has been integrated into a small island. In order to establish a proper frequency-stabilizing scheme for a small island, an accu...
This effort focus at identifying statistically significant time/frequency domain features with adequate separability and extensive interclass variability to discriminate probable Power Quality (PQ) disturbances such as sag, swell, harmonics, outage, transients etc. Understanding of disturbances is vital to investigate the origin and causes of PQ perturbances, events of equipment failure and for...
Customer loads were linear in nature. When a sinusoidal voltage was supplied to them, they drew a sinusoidal current. They typically fell into the categories of lighting, heating, and motors. In general, they were not very sensitive to momentary variations in the supply voltage, such as transients and voltage sags. The loads were not connected together in networks so grounding issues other than...
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