Output Characteristics of PV Array under Different Insolation and Temperature

Wang, Xueting; Hui, Liang

doi:10.1109/appeec.2012.6306869

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…Because the output power of a PV module array changes substantially under the effect of insolation and environmental temperature changes [1], power conditioners not only function as inverters, but also require a maximum power point (MPP) tracker to control the PV module array. Consequently, power loss in the PV module array can be reduced while maintaining MPP output under different environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Global Maximum Power Point Tracking (MPPT) of a Photovoltaic Module Array Constructed through Improved Teaching-Learning-Based Optimization

Chao

2016

Energies

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Abstract:The present study proposes a maximum power point tracking (MPPT) method in which improved teaching-learning-based optimization (I-TLBO) is applied to perform global MPPT of photovoltaic (PV) module arrays under dissimilar shading situations to ensure the maximum power output of the module arrays. The proposed I-TLBO enables the automatic adjustment of teaching factors according to the self-learning ability of students. Incorporating smart-tracking and self-study strategies can effectively improve the tracking response speed and steady-state tracking performance. To evaluate the feasibility of the proposed I-TLBO, a HIP-2717 PV module array from Sanyo Electric was employed to compose various arrays with different serial and parallel configurations. The arrays were operated under different shading conditions to test the MPPT with double, triple, or quadruple peaks of power-voltage characteristic curves. Boost converters were employed with TMS320F2808 digital signal processors to test the proposed MPPT method. Empirical results confirm that the proposed method exhibits more favorable dynamic and static-state response tracking performance compared with that of conventional TLBO.

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Section: Introductionmentioning

confidence: 99%

Global Maximum Power Point Tracking (MPPT) of a Photovoltaic Module Array Constructed through Improved Teaching-Learning-Based Optimization

Chao

2016

Energies

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“…If the fly-back power converter is operated in continuous conduction mode (CCM), then the duty of the PWM can be expressed as (2) where N is the turn ratio between the primary and secondary windings. Vo is the desired output voltage of the fly-back power converter and can be expressed as (3) The proposed SC controls the fly-back power converter to be a voltage source to output a constant voltage equal to the voltage of the un-shaded sub-module.…”

Section: Operating Principlementioning

confidence: 99%

“…For the P-V (power-voltage) curves of solar modules, a higher irradiance corresponds to a greater maximum power point and a greater output power [2]. A solar module has a unique maximum power point for different irradiance levels and different operating temperatures.…”

Section: Introductionmentioning

confidence: 99%

Voltage Equalizing of Solar Modules for Shadowing Compensation

Jou¹,

Wu²,

Wu³

et al. 2017

Journal of Power Electronics

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This paper proposes a shadowing compensation method for the solar modules of grid-connected photovoltaic generation systems. The shadowing compensator (SC) implemented by the proposed shadowing compensation method is used only for the solar modules that can be shaded by predictable sources of shading. The proposed SC can simplify both the power circuit and the control circuit as well as improve power efficiency and utilizes a voltage equalizer configured by a modified multi-winding fly-back converter. The proposed SC harvests energy from the entire solar cell array to compensate for the shaded sub-modules of the solar cell array, producing near-identical voltages of all shaded and un-shaded sub-modules in the solar cell array. This setup prevents the formation of multiple peaks in the P-V curve under shaded conditions. Hardware prototypes are developed for the SCs implemented by the conventional and modified multi-winding fly-back converters, and their performance is verified through testing. The experimental results show that both SCs can overcome the multiple peaks in the P-V curve. The proposed SC is superior to the SC implemented by the conventional multi-winding fly-back converter.

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“…Short-term goals of these energy policies include reduction in high-polluting power generations and global greenhouse gas emissions, improved diversity and security of energy supply, and exploitation of possible incentives for creating local value added opportunities for the related industrial sectors. RES based power generations may include wind turbine generator, photovoltaic and fuel cell systems [1]- [3]. Of these power generating methods, the interests in photovoltaic (PV) and wind turbine generator (WTG) are growing worldwide.…”

Section: Introductionmentioning

confidence: 99%

Power Flow Control of Renewable Energy Based Distributed Generators Using Advanced Power Converter Technologies

Ma¹,

Shr²

2015

JOCET

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Abstract-This paper describes a design concept in which a digital controlled power interface embedded with a battery energy storage system (BESS) named battery interfaced static synchronous generator (BISSG) is constructed to improve the power quality of micro-grid (MG) systems. Some distributed generation (DG) systems, e.g., the wind turbine generator (WTG) and the Photovoltaic (PV) systems conventionally generate real power based on natural conditions thus their output power are fluctuating from time to time. To eliminate this shortcoming, the proposed BISSG attempts to smooth the output power of DG with fast charging and discharging its BESS. To achieve a cost-effective design, the proposed BISSG is designed to maximize its control capability in terms of bilateral real power regulation and reactive power compensation for MG voltage support or power factor correction. It is important to note that the proposed BISSG is able to fulfill various real power dispatching functionalities required by the system operator. In this paper, the mathematical model of BISSG and its related controllers are firstly addressed. Then, simulation studies and hardware tests on a simplified MG network are carried out. Typical results are presented with brief discussions to demonstrate the feasibility and effectiveness of the proposed control scheme.Index Terms-Renewable energy, wind turbine generator, battery interfaced static synchronous generator, distributed generation, micro-grid. I. INTRODUCTIONWith the rapid development of new energy technologies, more and more renewable energy sources are being integrated into power distribution systems in the form of distributed generations (DG). In recent years, power converter interfaced DG systems, renewable energy sources (RES) based micro-grids (MG) and state-of-the-art communication and control technologies have been recognized to play important roles in the development of future energy policies. Short-term goals of these energy policies include reduction in high-polluting power generations and global greenhouse gas emissions, improved diversity and security of energy supply, and exploitation of possible incentives for creating local value added opportunities for the related industrial sectors. Based on the related technical reports in the open literature, potential Manuscript received September 25, 2013; revised January 16, 2014 [7]. Based on the standards such as IEEE1547, IEEE 929 and UL1741, DG inverter systems should operate at unity power factor [8]; however, this regulation has some limitations in practical applications, especially when some system-level control functions are to be performed. On the other hand, considering the installation quantity of PV and WTG has been continuously increased in recent years and the WTG and the PV systems generate real power based on nature conditions thus their output powers are not stable; this leads to a problem that fast output power fluctuation of the DG with high capacity can cause network frequency and voltage variations, especially in i...

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Output Characteristics of PV Array under Different Insolation and Temperature

Cited by 8 publications

References 3 publications

Global Maximum Power Point Tracking (MPPT) of a Photovoltaic Module Array Constructed through Improved Teaching-Learning-Based Optimization

Global Maximum Power Point Tracking (MPPT) of a Photovoltaic Module Array Constructed through Improved Teaching-Learning-Based Optimization

Voltage Equalizing of Solar Modules for Shadowing Compensation

Power Flow Control of Renewable Energy Based Distributed Generators Using Advanced Power Converter Technologies

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