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Outage Management System
An outage management system (OMS) is a computer system used by operators of electric distribution systems to assist in restoration of power. Major functions of an OMS Major functions usually found in an OMS include: * Prediction of location of transformer, fused, recloser or breaker that opened upon failure. * Prioritizing restoration efforts and managing resources based upon criteria such as locations of emergency facilities, size of outages, and duration of outages. * Providing information on extent of outages and number of customers impacted to management, media and regulators. * Calculation of estimation of restoration times. * Management of crews assisting in restoration. * Calculation of crews required for restoration. OMS principles and integration requirements At the core of a modern outage management system is a detailed network model of the distribution system. The utility's geographic information system (GIS) is usually the source of this network model. By combining ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Distribution Systems
Electric power distribution is the final stage in the Power delivery, delivery of electric power; it carries electricity from the Electric power transmission, transmission system to individual consumers. Distribution Electrical substation, substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between and with the use of transformers. ''Primary'' distribution lines carry this medium voltage power to distribution transformers located near the customer's premises. Distribution transformers again lower the voltage to the utilization voltage used by lighting, industrial equipment and household appliances. Often several customers are supplied from one transformer through ''secondary'' distribution lines. Commercial and residential customers are connected to the secondary distribution lines through service drops. Customers demanding a much larger amount of power may be connected directly to the primary distribution level or the subtr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographic Information System
A geographic information system (GIS) is a type of database containing Geographic data and information, geographic data (that is, descriptions of phenomena for which location is relevant), combined with Geographic information system software, software tools for managing, Spatial analysis, analyzing, and Cartographic design, visualizing those data. In a broader sense, one may consider such a system to also include human users and support staff, procedures and workflows, body of knowledge of relevant concepts and methods, and institutional organizations. The uncounted plural, ''geographic information systems'', also abbreviated GIS, is the most common term for the industry and profession concerned with these systems. It is roughly synonymous with geoinformatics and part of the broader geospatial field, which also includes GPS, remote sensing, etc. Geographic information science, the academic discipline that studies these systems and their underlying geographic principles, may also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interactive Voice Response
Interactive voice response (IVR) is a technology that allows telephone users to interact with a computer-operated telephone system through the use of voice and DTMF tones input with a keypad. In telecommunications, IVR allows customers to interact with a company's host system via a telephone keypad or by speech recognition, after which services can be inquired about through the IVR dialogue. IVR systems can respond with pre-recorded or dynamically generated audio to further direct users on how to proceed. IVR systems deployed in the network are sized to handle large call volumes and also used for outbound calling as IVR systems are more intelligent than many predictive dialer systems. IVR systems can be used standing alone to create self-service solutions for mobile purchases, banking payments, services, retail orders, utilities, travel information and weather conditions. In combination with systems such an automated attendant and ACD, call routing can be optimized for a better ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformer
A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Since the invention of the first constant-potential transfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCADA
Supervisory control and data acquisition (SCADA) is a control system architecture comprising computers, networked data communications and graphical user interfaces for high-level supervision of machines and processes. It also covers sensors and other devices, such as programmable logic controllers, which interface with process plant or machinery. Explanation The operator interfaces which enable monitoring and the issuing of process commands, like controller set point changes, are handled through the SCADA computer system. The subordinated operations, e.g. the real-time control logic or controller calculations, are performed by networked modules connected to the field sensors and actuators. The SCADA concept was developed to be a universal means of remote-access to a variety of local control modules, which could be from different manufacturers and allowing access through standard automation protocols. In practice, large SCADA systems have grown to become very similar to distr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Data System
Mobile may refer to: Places * Mobile, Alabama, a U.S. port city * Mobile County, Alabama * Mobile, Arizona, a small town near Phoenix, U.S. * Mobile, Newfoundland and Labrador Arts, entertainment, and media Music Groups and labels * Mobile (band), a Canadian rock band * Mobiles (band), a 1980s British band Other uses in music * ''Mobile'' (album), a 1999 album by Brazilian Paulinho Moska * "Mobile" (song), a 2003 song by Avril Lavigne from ''Let Go'' * "Mobile", a song by Gentle Giant from the album '' Free Hand'' Other uses in arts, entertainment, and media * Mobile (sculpture), a kinetic sculpture constructed to take advantage of the principle of equilibrium * ''Mobile'' (TV series), a British ITV drama * "Mobile", a short story by J. G. Ballard, later renamed "Venus Smiles" * Mobile, a feature of the game ''GunBound'' * '' Mobile Magazine'', a publication on portable electronics Military and law enforcement * '' Garde Mobile'', historic French military unit * Mobi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAIDI
A Ṣa‘īdī (, Coptic: ⲣⲉⲙⲣⲏⲥ ''Remris'') is a person from Upper Egypt (, Coptic: ⲙⲁⲣⲏⲥ ''Maris''). Etymology The word literally means "from Ṣa‘īd" (i.e. Upper Egypt), and can also refer to a form of music originating there, or to the dialect spoken by Sa‘idis. The Arabic word ''Ṣa‘īd'', as a geographical term, means "highland, upland, plateau". The suffix "-i" denotes the adjective. The word ''Ṣa‘īdi'' is pronounced in the dialect itself as or and the plural is or , while pronounced in Egyptian Arabic (Northern Egyptian) as and the plural is . In the Sahidic (Upper Egyptian) dialect of Coptic, the name for a person from Upper Egypt is (pronounced rem/rīs) meaning "person of the South" or (pronounced rem/pma/rīs or rem/ma/rīs) "person of (the) place of the south (i.e. Upper Egypt)". Stereotypes and jokes Ṣa‘īdis and their dialect are the subject of numerous Egyptian stereotypes and ethnic jokes, mainly from the uppe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CAIDI
The Customer Average Interruption Duration Index (CAIDI) is a reliability index commonly used by electric power utilities. It is related to SAIDI and SAIFI The Muslim Saifi, or sometimes pronounced Barhai are Muslim community, found in North India. They are also known as Saifi which denotes the Muslim sub-caste of blacksmiths and carpenters. A small number are also found in the Terai region of Nepa ..., and is calculated as \mbox = \frac where \lambda_i is the failure rate, N_i is the number of customers, and U_i is the annual outage time for location i. In other words, \mbox = \frac = \frac CAIDI gives the average outage duration that any given customer would experience. CAIDI can also be viewed as the average restoration time. CAIDI is measured in units of time, often minutes or hours. It is usually measured over the course of a year, and according to IEEE Standard 1366-1998 the median value for North American utilities is approximately 1.36 hours. References {{DEFAULTSO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAIFI
The Muslim Saifi, or sometimes pronounced Barhai are Muslim community, found in North India. They are also known as Saifi which denotes the Muslim sub-caste of blacksmiths and carpenters. A small number are also found in the Terai region of Nepal. The community is also sometimes referred to as Saifi or Tarkhan descendent of Tarkhan Dynasty of Sindh Pakistan.''People of India Uttar Pradesh'', Volume XLII Part One, edited by A Hasan & J C Das, pp. 190-193. Origin The community derive their name from the word ''barhai'', which means carpenter in Hindi. According to their own traditions, they are descended from early Muslim settlers to India. It is however likely, that they are immigrant from the Central Asia.They are also known as Tarkhan. In Uttar Pradesh, the Barhai/ Saifi have two sub-divisions, the Tarkhan and the Multani or immigrants from Multan known as Multani Lohar Each of these two groups in endogamous. They are found mainly in the Doab and Rohilkhand regions, and speak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAIFI
The Momentary Average Interruption Frequency Index (MAIFI) is a reliability index used by electric power utilities. MAIFI is the average number of momentary interruptions that a customer would experience during a given period (typically a year). Electric power utilities may define momentary interruptions differently, with some considering a momentary interruption to be an outage of less than 1 minute in duration while others may consider a momentary interruption to be an outage of less than 5 minutes in duration. Calculation MAIFI is calculated as \mbox = \frac Reporting MAIFI has tended to be less reported than other reliability indicators, such as SAIDI, SAIFI, and CAIDI The Customer Average Interruption Duration Index (CAIDI) is a reliability index commonly used by electric power utilities. It is related to SAIDI and SAIFI The Muslim Saifi, or sometimes pronounced Barhai are Muslim community, found in North In .... However, MAIFI is useful for tracking momentary power o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
