Dynamic performance of a DC shunt motor connected to a photovoltaic array

Fam, W.Z.; Balachander, M.K.

doi:10.1109/60.8076

Cited by 44 publications

(11 citation statements)

References 4 publications

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“…As shown in Figure There is a slight difference between the simulated and data sheet results, which is likely to be due to the losses in the gears (see APPENDIX B) and saturation of the air gap and pole faces as described in Section 2.4.4. Fam et al (1988) and Robles et al (2007) The operating C507/8 will have a current with a saw-tooth waveform, as shown in The same characteristics of torque versus speed curves can be seen in Figure 36 as regards the previous examples from Griffith (1978), Hill (1994a), andSchmid (2007). As shown in Figure 37, the peak of the average power between two substations is less than the rated power of a C507/8.…”

Section: Figure 33: Simulated Acceleration Versus Distance Graph For supporting

confidence: 55%

Simulation of energy efficiency improvements on commuter railways

Hull¹,

Roberts²,

Hillmansen³

2010

IET Conference on Railway Traction Systems (RTS 2010)

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Railway networks consume large amounts of energy and, as a result, are the cause of a significant amount of CO2 and other harmful gas emissions. British railways strive to comply with objectives set by the European Rail Research Advisory Council and the Committee on Climate Change. Improvements in the operation of railway networks through the use of energy efficiency regimes can decrease the operational costs and CO2 emissions. Existing and industry proven methods include regeneration, coasting allowances and driver training. The use of a simulator allows railway organisations to understand and quantify the benefits of the various methods for their particular rolling stock and networks.This thesis describes the development of a multi-train simulator for the Merseyrail network. The simulator is based on a pre-existing single train simulator.Results from the simulator show that a combination of regeneration, introduction of coasting points and improved driving style have the potential to provide up to a 50% increase in energy efficiency. In particular, the study shows that a 23% reduction in energy consumption through regeneration; a 22% energy reduction with the strategic placement of coasting points; and a 4% reduction in energy when an improved driving style is adopted, are possible. These improvements have the potential to eliminate 12 kilotonnes of CO2 emissions from Merseyrail per year. ACKNOWLEDGEMENTS

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Section: Figure 33: Simulated Acceleration Versus Distance Graph For supporting

confidence: 55%

Simulation of energy efficiency improvements on commuter railways

Hull¹,

Roberts²,

Hillmansen³

2010

IET Conference on Railway Traction Systems (RTS 2010)

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“…It can be represented by an equivalent circuit as shown in Figure 1, where I,, is the photon current, I, is the reverse saturation current, and R, and R,, are the series and shunt resistances, respectively. At any load current I, the terminal voltage V may be expressed as (Fam and Balachander 1988) where V , is the open-circuit voltage, I, is the short-circuit current, P -(1 + RJR,,), A -qIAKT, q is the electron charge, A is a completion factor, K is the Boltzman constant, and T is the absolute temperature. Figure 2 shows the current-voltage characteristics of the PV array obtained experimentally at a solar intensity of 1000 Wlm2, by means of a simple load test in which the current, voltage, solar radiation, temperature, and wind velocity were continuously recorded using a Fluke 2280 A data logger.…”

Section: The Photovoltaic Generatormentioning

confidence: 99%

Simulation and Testing of a Photovoltaic Solar-Powered Water Pumping System

Fam

Goswami

1992

Energy Sources

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A mathematical model for a photovoltaic (PV) solar-powered warer pumping system has been developed. It takes into account the effect of solar intensity and temperature on the power generated by the PV array, the torque-speed characreristics of the dc motor, the head-discharge characteristics of the pump, and the hydraulic losses in the pipeline. A computer program simulates the performance of the sprem under a specified solar condition by computing a series of quasi-steady states, each lasting for a short interval. By determining the operating point of the pump, the amount of warer pumped during the simulation period is calculated. 7he computed results are compared with those obtainedfrom actual tests on a 2-HP water pumping unit supplied from 4-kW PV array.

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“…The matching could be reached in two ways. First, without interfacing circuit, selecting carefully a DC motor according to motor I-V curve, mechanical load characteristics and PVM parameters [5]- [7]. Second, by including an electronic control device, known as maximum power point tracker (MPPT), which continuously matches the output characteristics of the PVM to the input characteristics of the motor [3], [4], [8], [9].…”

Section: Introductionmentioning

confidence: 99%

A maximum power point tracker using positive feedforward control based on the DC motor dynamics and PVM mathematical model

González-Llorente

Ortiz-Rivera

Díaz

2009

2009 IEEE International Electric Machines and Drives Conference

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This paper presents a maximum power tracking method for DC motor fed from photovoltaic modules (PVM) through step-down power converter. This method employs positive feedback of motor speed; therefore, only DC motor speed measurements are required. The designed control law is based on mathematical model of DC motor and power converter, and also, variations of optimal maximum power point (MPP) are considered at different values of irradiance. Optimal MPP is approximated by method known as linear reoriented coordinates method (LRCM). Finally, a simple analog circuit is designed and implemented, which calculates optimal duty ratio for power converter according to DC motor speed.

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Dynamic performance of a DC shunt motor connected to a photovoltaic array

Cited by 44 publications

References 4 publications

Simulation of energy efficiency improvements on commuter railways

Simulation of energy efficiency improvements on commuter railways

Simulation and Testing of a Photovoltaic Solar-Powered Water Pumping System

A maximum power point tracker using positive feedforward control based on the DC motor dynamics and PVM mathematical model

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