[특허]System for rating electric power transmission lines and equipment

System for rating electric power transmission lines and equipment 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01R-001/20 G08B-021/00
출원번호	US-0741964 (1991-08-05)
발명자 / 주소	Davis Murray W. (19790 Eastwood Harper Woods MI 48225)
인용정보	피인용 횟수 : 60 인용 특허 : 0

초록 ▼

A system for determining the current carrying capability of one or more overhead power transmission lines monitors one or more spans of each line on real-time basis and identifies the span having the lowest current carrying capacity which in turn establishes the maximum capacity of the entire line. The thermal state of each monitored line span is determined by measuring the conductor temperature, line current, solar radiation, ambient temperature, and in some cases wind speed and wind direction. These parameters are monitored by a sensor-transmitter unit that may be removably clamped on the line conductor which may range in size from one to several inches in diameter, and includes a radio transmitter for transmitting sensed data to a receiving substation. The data from the sensor-transmitter is multiplexed and transmitted by a telecommunications link to a computer which automatically determines line capacity using the real-time data and also calculates the time required for the “critical span”having the lowest current capacity to reach its maximum safe temperature based on any of a number of step changes in load demands. Each sensor-transmitter may include sensors for monitoring the current level, conductor temperature, solar radiation impinging on the conductor, ambient temperature, wind direction and velocity and conductor sag. These sensors and the transmitter are enclosed in a corona-free housing and are powered by a power supply that includes a transformer core which surrounds and is inductively coupled with the monitored conductor. The core is formed in an upper and lower portion which are shiftable relative to each other upon opening and closing a pair of conductor clamping jaws in order to permit the conductor to be introduced into and withdrawn from the core and to allow the clamping jaws to fit a range of conductor diameters while maintaining constant air gaps between the upper and lower core portions.

대표청구항 ▼

A method for monitoring the current carrying capacity of a length of an overhead electrical power line which includes a plurality of overhead electric power line spans, comprising the steps of: (a) monitoring on a real-time basis at least the actual conductor temperature parameter of said overhead electrical power line along at least one span, and using the monitored actual conductor temperature parameter to calculate the surface coefficient of heat transfer on said at least one monitored span; (b) generating data signals at said at least one monitored span corresponding to a desired maximum conductor temperature and said surface coefficient of heat transfer; (c) determining the current carrying capacity of each overhead electric power line span using at least the data signals generated in step (b); and (d) identifying the overhead electric power line span having the lowest current carrying capacity determined in step (c).

이 특허를 인용한 특허 (60)

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McBee, Bruce W.; Haensgen, Gregg James; Banting, John Fredrick; Kostolni, William J.; Cochran, Bryan C., Apparatus and method for mounting an overhead device.
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Lapinksi, Sterling; Hill, John Carroll, Apparatus and method for the measurement and monitoring of electrical power generation and transmission.
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Syracuse, Steven J.; Clark, Roy, Apparatus and system for monitoring temperature of high voltage conductors.
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Spillane, Philip E., Dynamic electric power line monitoring system.
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Spillane, Philip E.; Malek, Alireza, Dynamic electric power line monitoring system.
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Lindsey, Keith E.; Spillane, Philip E.; Wang, An-Chyun, Dynamic real time transmission line monitor and method of monitoring a transmission line using the same.
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Pond Robert J., Electric switches for reducing on-state power loss.
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Raymond, Russell N., Electrical transfer capacity optimization systems and methods thereof.
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Davis, Murray W., Fixed tap low threshold current power supply.
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Coolidge, Aaron P.; Mason, Timothy; Kast, Michael; Gill, Stephen P., High voltage powerline sensor with a plurality of voltage sensing devices.
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Davis, Murray W., Hotstick assembly for installing and removing devices from high voltage energized overhead power lines.
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Strehl, Thomas, Method and device for determining the electrical loadability of overhead lines by means of temperature measurement.
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Donazzi Fabrizio,ITX ; Gaspari Roberto,ITX, Method and system for analysis of electric power transmission link status.
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Staats, Preston Trent, Method for monitoring power and current flow.
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Brady, Steven Kenneth; Palmer, Jr., Donald Duane; Brownridge, Selina, Methods and systems for quantifying degradation of wiring insulation.
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Polk, Robert E.; Svoboda, John M.; West, Phillip B.; Heath, Gail L.; Scott, Clark L., Methods, apparatus, and systems for monitoring transmission systems.
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Polk, Robert E.; Svoboda, John M.; West, Phillip B.; Heath, Gail L.; Scott, Clark L., Methods, apparatus, and systems for monitoring transmission systems.
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White Richard M. (Berkeley CA) Campbell Gregory A. (Pleasanton CA), Microelectromechanical powerline monitoring apparatus.
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Campbell Gregory A. (Pleasanton CA) White Richard M. (Berkeley CA), Microelectromechanical-based power meter.
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Hansen,Roger, Monitoring system and device for an electric power line network.
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Wiesman,Richard M.; Mason,Timothy J.; Bastarache,Gary R., Non-invasive powerline communications system.
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Deb Anjan Kumar, Object oriented expert power line ampacity system.
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Banting, John Fredrick; Haensgen, Gregg James; McBee, Bruce W., Overhead communicating device.
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Daniel C. Lawry, Overhead line rating monitor.
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Davis, Murray W., Portable self powered line mountable device for measuring and transmitting ambient temperature.
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Davis, Murray W., Portable self powered line mountable device for measuring and transmitting solar radiation.
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Davis, Murray W., Portable self powered line mountable device for measuring and transmitting the undisturbed conductor temperature of electric power line conductors.
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Davis, Murray W., Switchable low threshold current power supply.
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Salewske, Tyson J.; Feight, Laurence V., Transceiver interface for power system monitoring.
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System for rating electric power transmission lines and equipment 원문보기

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안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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System for rating electric power transmission lines and equipment 원문보기

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