renewable and efficient electric power systems problem solution
Tài liệu ELECTRIC POWER SYSTEMS A CONCEPTUAL INTRODUCTION pptx
Ngày tải lên :
18/02/2014, 22:20
... Conceptualizing Power Flow 211
7.4 Power Flow Equations and Solution Methods 214
7.4.1 Derivation of Power Flow Equations 214
7.4.2 Solution Methods 217
7.4.3 Decoupled Power Flow 224
7.5 Applications and ... Power 101
4.3.3 Multiple Generators: Real Power 107
4.3.4 Multiple Generators: Reactive Power 112
viii
CONTENTS
ELECTRIC POWER
SYSTEMS
including reactive power, I had seen. That manual proved to ... complex subject of
electric power.
I envision two main audiences for this book. The first consists of students and
researchers who are learning about electric circuits and power system engineering
in...
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Electric Power Systems docx
Ngày tải lên :
07/03/2014, 10:20
... expected to start and stop about 40 times a day as well as
Figure 1.12 Wave power generation (Figure adapted from Pelamis)
Introduction 19
Electric Power
Systems
Electric Power
Systems
B.M. ... system is operated and controlled to give
secure and economic power supplies.
c. Analysis, the calculation of voltage, power, and re active power in the system
under normal and abnormal conditions. ... updated
edition will ensure that Electric Power Systems
continues to be an invaluable resource
for senior undergraduates in electrical engineering.
Electric Power
Systems
FIFTH EDITION
B.M. WEEDY,...
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MODELING AND CONTROL ASPECTS OF WIND POWER SYSTEMS doc
Ngày tải lên :
07/03/2014, 11:20
... alternative and renewable generation sources of electric
energy in power grids extremely important [1].
Recently, the renewable power grids that carry electricity generated by wind, solar, and tidal
have ... for
doubly-fed induction generators. Electric Power Components and Systems, 38(5):592–602,
2010.
[31] G. F. Franklin, J. D. Powel, and M. Workman. Digital Control of Dynamic Systems.
Addison-Wesley Publishing ... power control, as shown in the equations (10) and (11), it is required to
calculate the active and reactive power values, their errors, the stator flux magnitude and
position, the slip speed and...
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Báo cáo khoa học: "COMBINATORY CATEGORIAL RELATIONSHIP TO LINEAR GRAMMARS: GENERATIVE POWER AND CONTEXT-FREE REWRITING SYSTEMS"" pptx
Ngày tải lên :
17/03/2014, 20:20
... Weir and Joshi [14] described several
properties that were common to various conswained
grammatical systems, and defined a class of such
systems called Linear Context-Free Rewriting Systems ... CATEGORIAL GRAMMARS: GENERATIVE POWER AND
RELATIONSHIP TO LINEAR CONTEXT-FREE REWRITING SYSTEMS& quot;
David J. Weir
Aravind K. Joshi
Department of Computer and Information Science
University ... Bar-Hillel, C. Gaifman, and E. Shamir. On cate-
gorial and phrase structure grammars. In Language
and Information, Addison-Wesley, Reading, MA,
1964.
[4] J. Friedman, D. Dai, and W. Wang. The weak...
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electric power generation, transmission, and distribution ( (2)
Ngày tải lên :
21/03/2014, 12:08
... load currents during peak
and emergency conditions, performing coordination studies that include source and low side protection
equipment, and expected transformer size and winding configuration ... 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 when this alternative ...
.
Distur bances: Causes and Remedial Measures
.
Transient
Stabilit y and Out-of-Step Protection
.
Overload and Underfrequency Load
Shedding
.
Voltage Stabilit y and Under voltage Load Shedding...
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electric power generation, transmission, and distribution ( (3)
Ngày tải lên :
21/03/2014, 12:08
... 95TP102, 1995.
IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems,
ANSI=IEEE 242–1986.
Ilar, M. and Wittwer, M., Numerical generator protection offers ... If above, the reverse power gets as low as 0.2 to 2% of the rated power
and a sensitive reverse power relay is then needed. With steam turbines operating at full vacuum and
zero steam input, ... 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...
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electric power generation, transmission, and distribution ( (4)
Ngày tải lên :
21/03/2014, 12:08
... 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 apply
and to set ... time possible and removes the least amount of equipment from service. On Extra
High Voltage (EHV) systems, i.e., 345kV and above, it is common to use duplicate primary protection
systems in case ... and the tripping logic of both the primary and its duplicate system are the same.
It is not always practical to duplicate every element of the protection chain. On High Voltage (HV)
and EHV systems, ...
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electric power generation, transmission, and distribution ( (5)
Ngày tải lên :
21/03/2014, 12:08
... analog and digital communications systems for their
operations consisting of power line carrier, radio, microwave, leased phone lines, satellite systems, and
fiber optics. Each of these systems ... 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, ... becoming a frequent and challenging problem for the electric utilities.
The occurrence of major disturbances in power systems requires coordinated protection and control
actions to stop the system...
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electric power generation, transmission, and distribution ( (6)
Ngày tải lên :
21/03/2014, 12:08
... 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 and covariance ... 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 ... 1972.
Girgis, A.A. and Brown, R.G., Application of Kalman filtering in computer relaying, IEEE Trans. on
Power Appar. and Syst., 100, 3387, July 1981.
Harder, E.L. and Marter, W.E., Principles and practices...
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electric power generation, transmission, and distribution ( (7)
Ngày tải lên :
21/03/2014, 12:08
... 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 in the power system. ... 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. ... breaker and no additional restrikes or breaker failures occurred after the initial
distructive failures.
Oscillography in microprocessor relays can also be used to analyze system problems. The problem...
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electric power generation, transmission, and distribution ( (8)
Ngày tải lên :
21/03/2014, 12:08
... Deuse, J., and Baader, J.C., STAG a new unified software program for the study of
dynamic behavior of electrical power systems, IEEE Trans. on Power Systems, 4, 1, 1989.
Taylor, C.W., Power System ... better
understanding of the electric power industry’s practices with regard to system stability.
Power system stability was first recognized as an important problem in the 1920s (Steinmetz, 1920;
Evans and ... criterion and power circle diagrams were developed. These methods
were successfully applied to early systems which could be effectively represented as two machine systems.
As the complexity of power systems...
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