IEEE Std 762:2006 pdf free download

IEEE Std 762:2006 pdf free download.IEEE Standard Definitions for Use in Reporting Electric Generating Unit Reliability,Availability, and Productivity.
Although a generating unit generally includes all equipment from the fuel supply system up to the high. voltage terminals of the generator step-up transformer and the station service transformers, any cvcnt preventing the ability of the generating unit to produce electricity at its maximum capacity is covered in the scope of this standard. Sometimes, the generating unit cannot provide the power required to the customer because of problems not related to the power plant equipment. Some examples of these ‘cxtcrnal events” are transmission system failures, labor strikes, and catastrophic storms.
NOTE—Sec Annex F) for a discussion on these external eenLs.’
Reliability in this standard encompasses measures of the ability of generating units to perform their intended function.
Availability measures arc concerned with the fraction of time in which a unit is capable of providing service and accounts for outage frequency and duration.
Productivity measures are concerned with the total power produced by a plant with respect to its potential power production. A plant could comprise a unit or a number of units. Therefore, productivity measures consider magnitude of event as well as frequency and duration of event.
This standard was developed for application at the unit level; it does not address applications at the plant component or system level. Because of these exceptions, care should be taken when using this standard below the unit level.
Many of the performance indexes defined in Clause X are expressed as either outage rates or factors, and it is important to note the difference. A factor represents the percentage of time in the period of study that a unit occupied a given state, as in availability factor (AF), forced outage factor (FOF), or service factor. A factor may also represent the percentage of a total outcome achieved. as capacity factor represents the ratio of actual to theoretically possible generation. Factors may be added to provide a total accounting for unit states during a given period.