reactive power flow and control
reactive distillation design and control
Ngày tải lên :
01/04/2014, 11:30
... REACTIVE DISTILLATION DESIGN AND CONTROL WILLIAM L LUYBEN Lehigh University CHENG-CHING YU National Taiwan University REACTIVE DISTILLATION DESIGN AND CONTROL REACTIVE DISTILLATION DESIGN AND ... in reactive distillation design and a mere six in reactive distillation control From 1995 to 2007 there were 435 citations in reactive distillation design and 106 in reactive distillation control ... 15.1.1 15.1.2 15.1.3 Control Steady State Control Structure with Control Structure with Feedflow Controlled 15.2 ETBE Control 15.2.1 Control Structure with of C4 Feed 15.2.2 Control Structure with...
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FLUID POWER CIRCUITS and CONTROLS
Ngày tải lên :
06/07/2017, 00:42
... Overview of Fluid Power Flow is defined as volume per unit time, Q = V/t; therefore, Power = PQ (1.9) Mechanical power is the product of T and N and hydraulic power is the product of P and Q The relationship ... to pressure and flow by the pump, and the motor converts the pressure and flow back into torque and rpm Pressure is required to obtain torque from a motor or force from a cylinder Flow is required ... inside of the cylinder and the rod seals sliding on the rod 1.3 Sometimes pump flow rate is unknown, and a flowmeter is not available to insert in the line and measure flow An unloaded cylinder...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Series connected power flow control using magnetic energy recovery switch
Ngày tải lên :
15/10/2013, 16:12
... source and a capacitor in series, with the possibility of both controlling the equivalent reactance and the series voltage A control algorithm has been developed in order to facilitate power flow control ... increase C Steady State Current Flow Control The relationship between the loop current flow and the primary control set-point, Uset, was investigated for three different power supply voltages The test ... The control system was implemented using SH7045 microcontroller and was implemented as described in section II-D The control algorithm was performed 512 times every 50 Hz cycle Monitoring and...
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LONG TERM CHANGES IN VOTING POWER AND CONTROL STRUCTURE FOLLOWING THE UNIFICATION OF DUAL CLASS SHARES pdf
Ngày tải lên :
07/03/2014, 01:20
... appropriateness of the control sample below For each firm in our main and control samples we collect data on ownership and control The ownership data include the percentage of voting and cash flow (equity) ... Lubowski and Alexander Golub and Anil Markandya: Linking Reduced Deforestation and a Global Carbon Market: Impacts on Costs, Financial Flows, and Technological Innovation Emmanuel Farhi and Jean Tirole: ... in the controlling shareholders’ voting power between unifying and non-unifying firms in year -2 0.2% 2.7% Mean difference in the controlling shareholders’ voting power between unifying and non-unifying...
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MODELING AND CONTROL ASPECTS OF WIND POWER SYSTEMS doc
Ngày tải lên :
07/03/2014, 11:20
... and (7) show the system can provide independent active and reactive power control by regulating the rotor current The proposed deadbeat power control, shown in Wireless Coded Deadbeat Power Control ... 3v1 L M and for the reactive power control by using (8) is: i2d (k + 1) = i2dre f = − 2Qre f L1 3v1 L M + λ1 LM (13) where: Pre f is the active power reference and Qre f is the reactive power reference ... 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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power system stability and control chuong (1)
Ngày tải lên :
21/03/2014, 12:11
... examples of disturbance data in books such as The BMI Handbook of Power Signatures, Second Edition, and the Dranetz Field Handbook for Power Quality Analysis ß 2006 by Taylor & Francis Group, ... be used in conjunction with power quality monitors to find a solution to the problem 33.4 Summary Most power quality problems can be solved with simple hand-tools and attention to detail Some ... absence of standards, several manufacturers have developed proprietary ‘‘flicker’’ meters In recent years, an effort has been made to standardize the definition of ‘‘flicker,’’ and to standardize the...
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power system stability and control chuong (2)
Ngày tải lên :
21/03/2014, 12:11
... The Engineering Handbook, Third Edition, Richard C Dorf The Handbook of Formulas and Tables for Signal Processing, Alexander D Poularikas The Handbook of Nanoscience, Engineering, and Technology, ... Transforms and Applications Handbook, Second Edition, Alexander D Poularikas The VLSI Handbook, Second Edition, Wai-Kai Chen ß 2006 by Taylor & Francis Group, LLC Electric Power Engineering Handbook ... System Modeling and Analysis William H Kersting 22 Power System Operation and Control George L Clark and Simon W Bowen 23 Hard to Find Information (on Distribution System Characteristics and Protection)...
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power system stability and control chuong (3)
Ngày tải lên :
21/03/2014, 12:11
... Oklahoma, and Texas), the winds are strongest in the spring (March and April) and weakest in the summer (July and August) Utilities here are summer peaking, and hence need the most power when ... 1-4 Land Rights The wind is a free, clean, and inexhaustible energy source It has served humankind well for many centuries by propelling ships and driving wind turbines to grind grain and pump ... larger wind turbines to supply power to their customers The largest wind turbine built before the late 1970s was a 1250-kW machine built on Grandpa’s Knob, near Rutland, Vermont, in 1941 This turbine,...
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power system stability and control chuong (4)
Ngày tải lên :
21/03/2014, 12:11
... a result, the compressor and the expander must operate at the same time and must have the same air mass flow rate In the case of a CAES plant, the compressor and the expander can be sized independently ... but the compressor and the expander operate independently In a combustion turbine, the air that is used to drive the turbine is compressed just prior to combustion and expansion and, as a result, ... systems are quiet and non-polluting, and can be installed near load centers and existing suburban substations These have round-trip AC–AC efficiencies in the range of 85%, and can respond to...
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power system stability and control chuong (5)
Ngày tải lên :
21/03/2014, 12:11
... technology have produced tandem cells similar to the a-Si:H tandem cell One cell consists of two tandem GaAs cells, separated by thin tunnel junctions of GaInP, followed by a third tandem GaInP cell, ... outdated Reliability of cells, modules, and system components continues to improve Efficiencies of cells and modules continue to increase, and new materials and cell fabrication techniques continue ... ribbon growth in an effort to eliminate wafering, and combining crystalline and amorphous Si in a tandem cell to take advantage of the two different bandgaps for increasing photon collection efficiency...
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power system stability and control chuong (6)
Ngày tải lên :
21/03/2014, 12:11
... Individual Unit Control Switchyard, Spillway, Station Service Control and Monitoring Plant Real Power Control and Monitoring Automatic Voltage Control Water and Power Optimization Water Bypass Control ... to control the rotor angle acceleration during system fault conditions [see Power System Stability and Control, Kundur (1994) and Section of title Power System Stability and Control of this handbook.] ... power system dynamic oscillations [see Power System Stability and Control, Kundur (1994) and Section of title Power System Stability and Control of this handbook.] Various auxiliary devices are...
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power system stability and control chuong (7)
Ngày tải lên :
21/03/2014, 12:11
... electrically powered stator winding generates rotating electromagnetic poles and the attraction of the rotor magnets, operating in synchronism, produces torque and delivery of mechanical power to ... torsional oscillation and to suppress harmonic variation in the magnetic waveform In a motor, heavy bars and end connections are required in the pole face to minimize and withstand the high heat ... insulation as if it were a capacitor Shaft grounding and shaft voltage and grounding current monitoring can be employed to predict and prevent bearing and other problems 5.3 Performance 5.3.1 Synchronous...
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power system stability and control chuong (8)
Ngày tải lên :
21/03/2014, 12:11
... DC Auxiliary Power Systems for Generating Stations Switchgear IEEE Standards Collection: Power and Energy-Switchgear, 1998 Edition Auxiliary Transformers IEEE Distribution, Power and Regulating ... plant and range in size from fractional horsepower to several thousand horsepower These motors may be supplied with the equipment they drive or they may be specified by the electrical engineer and ... plant loads when the plant is up and running 6.1.3 Auxiliary System Power Sources The power sources for a generating plant consist of one or more off-site sources and one or more on-site sources...
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power system stability and control chuong (9)
Ngày tải lên :
21/03/2014, 12:11
... by-products of water, carbon dioxide, and heat The DC power can be used directly or it can be fed to a power conditioner and converted to AC power (see Fig 7.2) DC Current Flow Hydrogen (H2) anode electrolyte ... microturbines and fuel cells, would require more stringent control packages due to their islanding and reverse power capabilities Most of the new developing technologies are inverter based and there ... and to some extent photovoltaics Most of these technologies are best suited for power quality and reliability enhancement applications, due to their relative energy storage capabilities and power...
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power system stability and control chuong (10)
Ngày tải lên :
21/03/2014, 12:11
... used voltage control method The capacitor reduces lagging -power- factor reactive power and improves the power factor This increases voltage and reduces current and losses Mechanical and thyristor ... line, and consists of several thyristor-controlled capacitors in series or parallel, and may include thyristor-controlled inductors Medium- and low-voltage systems use several other electronic control ... References Electric Power Research Institute, Transmission Line Reference Book, 345 kV and Above, Electric Power Research Institute, Palo Alto, CA, 1987 Fink, D.G and Beaty, H.W., Standard Handbook for...
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power system stability and control chuong (11)
Ngày tải lên :
21/03/2014, 12:11
... consideration as an International Standard References Carton, T and Peyrot, A., Computer Aided Structural and Geometric Design of Power Lines, IEEE Trans on Power Line Syst., 7(1), 1992 Dreyfuss, ... Valley, Electric Light and Power Magazine, 48(vii), 55–58, 1971 12 Pohlman, J and Lummis, J., Flexible Structures Offer Broken Wire Integrity at Low Cost, Electric Light and Power, 46(V, 144–148.4), ... longitudinal, transverse, and vertical directions, and the structure deterministically designed Using the loads and structure configuration, ground line reactions are calculated and used to accomplish...
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power system stability and control chuong (12)
Ngày tải lên :
21/03/2014, 12:11
... energization and resonance, cause power frequency, or close-to -power frequency, and relatively long duration overvoltages The duration is from sec to several minutes The expected peak amplitudes and duration ... Transmission Line Reference Book (345 kV and Above), 2nd ed., EL 2500 Electric Power Research Institute (EPRI), Palo Alto, CA, 1987 Fink, D.G and Beaty, H.W., Standard Handbook for Electrical Engineers, ... need to carry the weight of the conductors and the weight of occasional ice and wind loading In northern areas and in higher elevations, insulators and lines are frequently covered by ice in...
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power system stability and control chuong (13)
Ngày tải lên :
21/03/2014, 12:11
... realized and maximum safety of personnel is attained, properly designed and constructed tools and equipment are tantamount to a successful job Because the initial cost of these tools and equipment ... conductors being strung and pulling cables being used, or fully insulating equipment and operator, isolating equipment and personnel All equipment, conductors, anchors, and structures within a ... was physically able to withstand the tensions of lowering it to the ground By utilizing a helicopter and bare-hand work methods, the spacers were able to be replaced and the conductor strengthened...
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power system stability and control chuong (14)
Ngày tải lên :
21/03/2014, 12:11
... direct buried low-voltage power cables 12.4 Medium- and High-Voltage Power Cables Medium- and high-voltage power cables, in addition to being insulated, are shielded to contain and evenly distribute ... strands Conductors used at transmission voltages may have exotic stranding to reduce the voltage stress Cables requiring greater flexibility such as portable power cable utilize very fine strands ... published standards for the various types of power cables 12.2 Conductor Common among all classes in function is the central conductor, the purpose of which is to conduct power (current and voltage)...
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power system stability and control chuong (15)
Ngày tải lên :
21/03/2014, 12:11
... Devices and Power Systems, John Wiley and Sons, Inc., New York, 1994 Glover, J.D and Sarma, M.S., Power System Analysis and Design, 3rd ed., Brooks=Cole, 2002 Stevenson, W.D Jr., Elements of Power ... for phases A, B, and C carrying the charges qA, qB, and qC and their respective image conductors A0 , B0 , and C0 DA, DB, and DC are perpendicular distances from phases A, B, and C to earth’s ... speed of 1.4 mi=h, and conductor and air temperatures of 758C and 258C, respectively Tables 13.3a and 13.3b present the corresponding characteristics of AACs References Yamayee, Z.A and Bala, J.L...
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