electric power generation, transmission, and distribution (1)

... constraints have pushed power systems to be operated close to their technical limits, thus reducing security margins. On the other hand, power systems are continuously subjected to random and various disturbances that ... DY jk e T jk [B 0 ] À1 e jk . References Debs, A.S. and Benson, A.R., Security Assessment of Power Systems, in System Engineering for Power: Status and Prosp...

Ngày tải lên: 21/03/2014, 12:08

... 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...

Ngày tải lên: 21/03/2014, 12:08

... 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...

Ngày tải lên: 21/03/2014, 12:08

... 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...

Ngày tải lên: 21/03/2014, 12:08

... 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,...

Ngày tải lên: 21/03/2014, 12:08

... 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...

Ngày tải lên: 21/03/2014, 12:08

... dominant poles of power system transfer functions, IEEE Trans. Power Systems, 1 1(1), 162–170, February 1996. Pal, B. and Chaudhuri, B., Robust Control in Power Systems, Springer Science and Business ... 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 1...

Ngày tải lên: 21/03/2014, 12:08