electric power generation, transmission, and distribution

... maintenance and cost advantages found with power fuses. Protection and control devices, circuit breakers, and station batteries are required. The overcurrent relays are a small part of the total cost and ... disturbances=geomagnetically-induced current and protective relaying, Electric Power Research Institute Report TR-102621, Project 321-04, August 1993. Warrington, A.R. van...

Ngày tải lên: 21/03/2014, 12:08

... a small set-value SET_4 and the negative and zero sequence currents I2 and I2 do not exceed a small set-value SET_3, then a fuse failure condition will pick up to one and remain in that state ... generation and load on an electrical network, the network frequency will be stable and the internal angle of the generators will remain constant with respect to each other. If an imbalanc...

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... those lines operating at 138 kV and above, sub- transmission lines are 34.5 kV to 138 kV, and distribution lines are below 34.5 kV. These are not rigid definitions and are only used to generically ... location. As the power systems become more complex and the fault current varies with changes in generation and system configuration, directional overcurrent relays become difficult to...

Ngày tải lên: 21/03/2014, 12:08

... 1987. 4. Phadke, A.G. and Thorp, J.S., Computer Relay ing for Power Systems, John Wiley & Sons, New York, 1988. 5. Anderson, P.M., Power System Protection, McGraw Hill and IEEE Press, New York, ... D., and Milisavljevic, M., Trends in power system protection and control, Proceeding s 1999 HICSS Conference, Maui, Hawaii, January 4–7, 1999. 7. Begovic, M. and Working Group C...

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... time and Eq. (5.44) represents the measurements. The terms w k and v k are discrete time random processes representing state noise, i.e., random inputs in the evolution of the parameters, and ... state x, and recursively updates the estimate of state. The initial assumption about the state is that it is a random vector independent of the processes w k and v k and with a known mean...

Ngày tải lên: 21/03/2014, 12:08

... This restrike cannot be extinguished and will last until the oil becomes badly carbonized and a subsequent fault occurs between the bus breaker terminal and the breaker tank (ground). In Fig. ... Performance John R. Boyle Power Sys tem Analys is Protection of present-day power systems is accomplished by a complex system of extremely sensitive relays that function only during a fault...

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... Design and Operation For reliable service, a power system must remain intact and be capable of withstanding a wide variety of disturbances. Owing to economic and technical limitations, no power ... G.K., Gao, B., and Kundur, P., Voltage stability analysis using static and dynamic approaches, IEEE Trans. on Power Systems, 8, 3, 1159, 1993. Morison, G.K., Wang, L., and Kundur,...

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... maximum power. Figure 8.3 shows that for a given input power to the generator P m1 , the electrical output power is P e (equal to P m ) and the corresponding rotor angle is d a . As the mechanical power ... methods of analysis, control and enhancement, and practical aspects of its influence on power system design and operation. 8.2 Basic Theory of Transient Stability Most po...

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... Alvarez, O., and Wu, C., Eigenvalue and frequency domain analysis of the intermountain power project and the WSCC network, IEEE Trans. Power Systems, 238–244, February 1991. Pourbeik, P. and Gibbard, ... dominant poles of power system transfer functions, IEEE Trans. Power Systems, 11(1), 162–170, February 1996. Pal, B. and Chaudhuri, B., Robust Control in Power Systems, Sp...

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... Pozzi, M., and Corsi, S., Comparing secondary voltage regulation and shunt compensation for improving voltage stability and transfer capability in the Italian power system, Electric Power Systems ... Van Cutsem, T., and Vittal, V., Definition and classification of power system stability, IEEE Transac- tions on Power Systems, 19, 1387–1401, 2004. Lof, P A., Smed, T., Andersso...

Ngày tải lên: 21/03/2014, 12:08