An excellent operating point tracker of the solar-cell power supply system

Kobayashi, Kazutoshi; Matsuo, Hirofumi; Sekine, Y.

doi:10.1109/tie.2006.870669

Cited by 87 publications

(25 citation statements)

References 6 publications

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“…Therefore, I LK11 (1) can be determined as: (14) where L m11 is the magnetizing inductor of primary winding of coupled inductor and L m12 is its secondary winding inductor. According to Equation (14), I LK11 (1) can be rewritten by: (15) Moreover, I LK11 (2) can be given by: (16) Since current I D1 (1) is equal to I LK11 (2) and average current I D1(av) equals half of output current I O , the average current I D1(av) can be expressed as follows : (17) According to Equation (17), the boundary inductance L m11B can be determined as: (18) Based on the magnetic principle of coupled inductor, the relationship between inductances L m11B and L m12B can be expressed as follows:…”

Section: Duty Ratio Dmentioning

confidence: 99%

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A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Tseng

Wang

2013

Energies

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This paper presents a power system using a high step-up converter for dc load applications. The high step-up converter adopts a boost converter with interleaved mode and a coupled inductor to raise its powering ability and increase its step-up voltage ratio, respectively. In order to increase conversion efficiency, an active clamp circuit is introduced into the proposed one to provide soft-switching features to reduce switching losses. Moreover, switches in the converter and active clamp circuit are integrated with a synchronous switching technique to reduce circuit complexity and component counts, resulting in a lower cost and smaller volume. A perturb and observe method is adopted to extract the maximum power from photovoltaic (PV) arrays. Furthermore, a microchip associated with PWM IC is used to implement maximum power point tracking operation, voltage regulation and power management. Finally, a prototype PV power system with 400 V/6 A has been implemented for verifying the feasibility of the proposed PV power system. It is shown to be suitable for PV energy conversion applications when the duty ratios of switches in the dc/dc converter are less than 0.5.

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Section: Duty Ratio Dmentioning

confidence: 99%

“…Several MPPT algorithms have been proposed [11][12][13][14][15][16][17][18][19][20]. Some of the more popular MPPT algorithms are the constant voltage method [11,12], β method [13], system oscillation method [14,15], ripple correlation method [16], incremental conductance method [17] and perturb and observe method [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Tseng

Wang

2013

Energies

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“…The characteristics of the multi-level inverters for PV applications can increase the generation efficiency of the PV system in the case of a mismatch in the string, due to unequal solar radiation, aging of the PV modules, different types of cells, or the accumulation of dust on the surface of the modules [10]- [16]. The cascaded H-bridge multi-level inverter is an interesting conversion topology among the available multi-level inverters because of its modularity, simple layout, and reduced number of components.…”

Section: Characteristics Of Multi-level Inverters For Pv Applicatmentioning

confidence: 99%

Implementation of a High Efficiency Grid-Tied Multi-Level Photovoltaic Power Conditioning System Using Phase Shifted H-Bridge Modules

Lee¹,

Min²,

Yoo³

2013

Journal of Power Electronics

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This paper proposes a high efficiency three-phase cascaded phase shifted H-bridge multi-level inverter without DC/DC converters for grid-tied multi string photovoltaic (PV) applications. The cascaded H-bridge topology is suitable for PV applications since each PV module can act as a separate DC source for each cascaded H-bridge module. The proposed phase shifted H-bridge multi-level topology offers advantages such as operation at a lower switching frequency and a lower current ripple when compared to conventional two level topologies. It is also shown that low ripple sinusoidal current waveforms are generated with a unity power factor. The control algorithm permits the independent control of each DC link voltage with a maximum power point for each string of PV modules. The use of the controller area network (CAN) communication protocol for H-bridge multi-level inverters, along with localized PWM generation and PV voltage regulation are implemented. It is also shown that the expansion and modularization capabilities of the H-bridge modules are improved since the individual inverter modules operate more independently. The proposed topology is implemented for a three phase 240kW multi-level PV power conditioning system (PCS) which has 40kW H-bridge modules. The experimental results show that the proposed topology has good performance.

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“…As shown the PV output characteristics of a PV module in Figure4 [4,13], at a constant temperature, if the irradiation is increased, then the output power is increased too.…”

Section: Characteristics Of Pv Modulementioning

confidence: 99%

Technical and Financial Analysis of Photovoltaic Water Pumping System for GORGAN, IRAN

Rezae

Gholamian

2013

IJCI

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Because of human need for energy, extra special attention is in the usage of renewable-energy sources in recent years. On the other hand, environmental pollution is created with fossil energy. Photovoltaic (PV) energy is also one of the renewable-energy sources that are available in almost all parts of the globe, especially in Iran. One application of this energy is in water pumping system. In this paper, we precede the technical and financial study on photovoltaic water pumping system for irrigation of GORGAN's farm fields (one of Northern Province of Iran) with the RETScreen software tools. In order to the results, it is obvious that the usage of this clean energy causes the reduction on production costs during of its operation.

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An excellent operating point tracker of the solar-cell power supply system

Cited by 87 publications

References 6 publications

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Implementation of a High Efficiency Grid-Tied Multi-Level Photovoltaic Power Conditioning System Using Phase Shifted H-Bridge Modules

Technical and Financial Analysis of Photovoltaic Water Pumping System for GORGAN, IRAN

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