Performance ratio – Crucial parameter for grid connected PV plants

Khalid, Ahmad Mohd; Mitra, Indradip; Warmuth, Werner; Schacht, Volker

doi:10.1016/j.rser.2016.07.066

Cited by 139 publications

(59 citation statements)

References 18 publications

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“…Moreover, it must be considered that, on an annual basis, crystalline silicon sensors measure less irradiation than pyranometers, although the difference between the two types of sensors depends very much on the sensor and the location (in Germany, the difference is around 2-4%). Therefore, the annual PR of a PV plant that is calculated on the basis of crystalline silicon sensors may be higher than PR based on pyranometer measurements [12,65,66]. In that regard, no information was found in the case of amorphous silicon sensors, which was the sensor used in this work.…”

Section: Performance Ratiomentioning

confidence: 98%

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Graphical Diagnosis of Performances in Photovoltaic Systems: A Case Study in Southern Spain

et al. 2017

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Abstract:The starting point of the operation and maintenance tasks in photovoltaic plants is the continuous monitoring and supervision of its components. The great amount of registered data requires a major improvement in the ways this information is processed and analyzed to rapidly detect any potential fault, without incurring additional costs. In this paper, a procedure to perform a detailed graphical supported analysis of the operation of photovoltaic installations, based on inverter data, and using a self-developed application, is presented. The program carries out the automated processing of the registered data, providing their access and visualization by means of color maps. These graphs allow a large volume of data set to be simultaneously represented in a readable way, enabling operation and maintenance operators to quickly detect patterns that would require any type of intervention. As a case study, the operation of a grid-connected photovoltaic plant located in southern Spain was studied during a period of three years. The average daily efficiency values of the PV modules and inverters were in the range of 7.6-14.6%, and 73.5-94% respectively. Moreover, the presence of shadings, as well as the hours and days mainly affected by this issue, was easily detected.

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Section: Performance Ratiomentioning

confidence: 98%

“…is a dimensionless index mainly used to characterize the performance of PV installations, which measures the degree of utilization of an entire PV system [65,66]. It is the ratio of useful generated energy versus the energy that should be generated by a lossless ideal PV plant at 25 • C and receiving the same irradiation.…”

Section: Introductionmentioning

confidence: 99%

Graphical Diagnosis of Performances in Photovoltaic Systems: A Case Study in Southern Spain

et al. 2017

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“…PV power generation is often affected by various factors such as radiation, altitude, and climate, while load consumption is influenced by the power of the equipment, stream efficiency, electricity price, and so on. The representative photovoltaic rate (PR) curve over 1 month (31 days) is shown in Figure , in which the PR is defined as the instantaneous PV power divided by the rated power . The numbers of days on which the PR peak value is greater than 60%, between 60% and 30%, and less than 30% are 10, 9, and 12 days in the month, respectively (as shown in Figure ), suggesting that sunlight resources are not abundant in the Shanghai area.…”

Section: Case Study Definitionmentioning

confidence: 99%

Economic analysis of an industrial photovoltaic system coupling with battery storage

et al. 2019

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Summary The Energy and Evaluation Special Committee of the China Price Association proposed two types of bill for battery energy storage (BES) subsidies in 2017: the first was that energy storage should be subsidised based on the initial installation capacity of BES system, while the second was that it should be subsidised based on the energy discharged by the BES system during the operational period. The economic benefits of a distributed photovoltaic (PV) system or a distributed system with PV and BES in the overall life cycle are discussed in the context of an industrial zone in Shanghai. The results suggest that the net present value (NPV) of a PV‐BES system with an optimised configuration is higher than the NPV of a PV system alone. The NPV of a distributed PV system with four different BESs is found to decrease in the order Li‐ion > NaS > VFB > Pb‐C because of the characteristics of their batteries. The NPVs of PV‐BES systems increase in equal proportion to the increase in the BES subsidy based on installation capacity for these four BES systems, while they show an inequable growth rate of earnings for the same BES subsidy based on the energy discharged over the operational period. The second bill for BES subsidy is more beneficial to the BES industry than the first, as it encourages higher pay for more work.

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“…METHODOLOGY To evaluate the performance of a PV system, the most common used variable is the yield factor, Y f . The yield factor, as defined in Equation (1) measures the PV system energetic production, E DC (in kWh) normalized to the installed power, P installed (in kW) [12].…”

Section: B Grid-connected Setupmentioning

confidence: 99%

“…Following the International Electro Technical Commissions Standard IEC 61724 [12], the Performance Ratio, PR, constitutes a global indicator for photovoltaic installations evaluation allowing to assess the reliability and efficiency of a PV array over a specific period [14] [15]. The performance ratio is defined as the ratio of the specific yield factor, Y f, and the reference yield, Y r, as show in Equation 4.…”

Section: B Grid-connected Setupmentioning

confidence: 99%

Optimal PV Technology Selection Depending On Climatic Conditions

López¹

2017

IJRASET

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The performance of a PV system suffers with the working conditions, especially with high radiation levels and temperature. This effect worsens in extreme weather conditions. The selection of the most appropriate PV technology improves the system performance, increases the useful lifetime and has a positive effect of the lifecycle. In this paper, an instrument to select the PV technology with the best performance for a considered location in which a detailed climate analysis is available is performed. The work is based on data collected under real sun conditions on two experimental setups (laboratory and commercial grid connected PV array). The study includes mainly climatic conditions dependences. A rude tendency of the effects associate to the ageing and the lack of maintenance is taken in consideration. The work is extended to the most common PV commercial technologies. As an example of application, the tendency decision table is used to perform a map of the most powerful PV technologies worldwide. Keywords: PV performance, PV technology selection, extreme climatic conditions, radiation, temperature I. INTRODUCTIONThe use of PV technology as a renewable energy based solution presents an enormous potential worldwide, especially for regions with extreme climatic conditions. The high adaptability legated to its modularity favours the implementation on grid-connected and isolate installations. Its robustness and low maintenance needs to ensure a high performance even in complicated locations. Moreover, the actual decrease on the earlier sharp prices and the improvements on their lifecycle, make the PV technology competitive with the conventional energy sources. In the frame of the actual Sustainable Development Goals (SDGs) [1] implementation, it will help the fulfilment of goal two, devote to offer clean and affordable energy for everyone. Solar energy is available worldwide. While some regions are characterized for having high radiation levels and limited alternative renewable energy sources (like wind or water), other regions show lower solar energy potential but, unlike other renewable energies, this resource is always present. In these conditions, the solar energy constitutes the most suitable renewable energy source worldwide. Nevertheless, several PV experiences developed on extreme climatic conditions complain about the low performance of the PV systems, the decrease on their efficiency level, its fast degradation and even unexpected failures. The possible causes of their inefficiency are leaded by the installed PV technology and climatic conditions as radiation level (G) or ambient temperature (T). Manufacturing characteristics and a poor maintenance level will also influence. To ensure a good performance of a PV system, an optimal technology selection is mandatory. An adequate PV technology selection leads to a longer system lifetime, decreasing the number and the importance of failures. As associated advantages, also the raw material reduction, an environmental impact diminution and the improv...

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Performance ratio – Crucial parameter for grid connected PV plants

Cited by 139 publications

References 18 publications

Graphical Diagnosis of Performances in Photovoltaic Systems: A Case Study in Southern Spain

Graphical Diagnosis of Performances in Photovoltaic Systems: A Case Study in Southern Spain

Economic analysis of an industrial photovoltaic system coupling with battery storage

Optimal PV Technology Selection Depending On Climatic Conditions

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