Optimal sizing of array and inverter for grid-connected photovoltaic systems

Mondol, Jayanta Deb; Yohanis, Yigzaw G.; Norton, Brian

doi:10.1016/j.solener.2006.01.006

Cited by 150 publications

(59 citation statements)

References 10 publications

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“…The predicted results show that the maximum annual total AC output of the system was achieved for this location at PV/inverter sizing ratio of 1Á3. 25 The hourly inverter efficiency as a function of hourly 458 inclined plane insolation over the monitored period is shown in Figure 10. Inverter efficiencies were 30-70% when the incident insolation was less than 100 Wh/m 2 .…”

Section: Inverter Performancementioning

confidence: 99%

The effect of low insolation conditions and inverter oversizing on the long‐term performance of a grid‐connected photovoltaic system

Mondol

Yohanis

Norton³

2007

Progress in Photovoltaics

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The performance of a roof mounted grid-connected photovoltaic (PV) system in Northern Ireland was monitored over 3 years on annual, seasonal and monthly bases. The overall system performance was adversely affected by low insolation conditions; 19% of total incident insolation was absorbed at irradiance level below 200 W/m 2 and 67% below 600 W/m 2 , only 6Á2% above 900 W/m 2 . In summer and winter, the PV and system efficiencies were 9Á0 and 8Á5%, and 7Á8 and 7Á5%, respectively and inverter efficiencies were 86Á8 and 85Á8%, respectively. The inverter for this particular system was oversized; 77% of the total DC energy produced when inverter's operating load was 50% of its rated capacity. The annual average monthly system performance ratio (PR) was 0Á61 with seasonal variation 0Á59 to 0Á63. The average monthly PV, system and inverter efficiencies over the whole monitored period were 8Á8, 7Á6 and 86Á8%, respectively. The main losses of the system were inverter DC/AC conversion loss, inverter threshold loss and low insolation loss.

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Section: Inverter Performancementioning

confidence: 99%

The effect of low insolation conditions and inverter oversizing on the long‐term performance of a grid‐connected photovoltaic system

Mondol

Yohanis

Norton³

2007

Progress in Photovoltaics

Self Cite

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“…The cost saving generally comes from the price difference of the inverters with different nominal power, but it may be also due to the different grid connection costs depending on the rated power of the power plant. More complex methods also exist for the best inverter sizing [9], but as a rule of thumb in practical applications 80 % is acceptable for an optimal value of the inverter and PV array power ratio.…”

Section: Fig 5 Losses Caused By the Undersized Invertermentioning

confidence: 99%

Complex method for performance prediction of photovoltaic systems

Mayer¹,

Dán²

2014

REPQJ

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Abstract. This paper shows a method for modelling photovoltaic (PV) systems, including different models for the solar cells, DC circuit and the inverter. The author created a Matlab simulation based on these models, enabling to perform various calculations. Predicting the amount of energy produced by PV systems has a great impact on the accurate calculation of financial return of investment. Furthermore the more accurate estimation of produced energy promotes the system integration of small-scale PV generators by enabling to schedule their production. The different analyses shown in this paper helps to understand the operation characteristics and the most important design considerations of these small-scale solar plants.

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“…Others [6] [7] have developed heuristic methodologies, relying on evolutionary algorithms to optimize micro grids or HRESs size according to cost, environmental, or reliability parameters. However, few of them deal with solar-, wind-, and biomass-resource hybridization in a grid-connected scheme [8] - [11]. In [12] the authors showed that the Moroccan climate is very favorable for the installation of gridconnected microgrid in several regions of the country.…”

Section: Introductionmentioning

confidence: 99%

Economic Sizing of a Grid-Connected Photovoltaic System: Case of GISER research project in Morocco

Khanfara¹,

Bachtiri²,

Boussetta³

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. This paper is within the framework of the GISER (Gestion Intelligent des Systèmes d'Energies Renouvelables). It's a project about 3kVA hybrid energy management in PERE Laboratory (Procedés des Energies Renouvelables) of EST fez Morocco. We present a sizing study and a cost analysis of a photovoltaic system using simulation results with Sunny Design software. The goal of our work is to compute and optimize the dimensioning of a photovoltaic installation in order to find the best configuration of the system. We have considered a PV installation connected to the grid with 2.5kWp through an inverter. We have taken into account meteorological conditions in the installation site (radiation and temperature). Our optimization approach considers the operation of each part of the installation, including energy production, energy consumption and the overall quality/price of the installation. IntroductionThe rapid depletion of fossil-fuel resources on a worldwide basis has necessitated an urgent search for alternative energy sources. Photovoltaic and wind energy are considered as promising toward meeting the continually increasing demand for energy. The solar energy is inexhaustible and pollution-free. With the growing world population, electrical network become nonoperational due to redundant and overstressed infrastructure. Micro-grids are a promising solution to provide local energy generation and management [1]. Generated energy from PV systems depends mainly on solar energy available at selected site. Geographical location, ambient temperature, clearness index, tilt angle and orientation of PV panel. In order to efficiently and economically use of PV array system sizing and economic analysis is necessary [2]. Several researches, deal with system cost optimization of either grid-connected or stand-alone using HOMER optimization software which is based on the analytical simulation and storage system with anaerobic digestion biogas Power Plants [3]- [5]. Others [6][7] have developed heuristic methodologies, relying on evolutionary algorithms to optimize micro grids or HRESs size according to cost, environmental, or reliability parameters. However, few of them deal with solar-, wind-, and biomass-resource hybridization in a grid-connected scheme [8] -[11]. In [12] the authors showed that the Moroccan climate is very favorable for the installation of gridconnected microgrid in several regions of the country. In [13] a grid coupling and injection into isolated grid networks with a proposed method to eliminate the first harmonics using a multilevel inverter. The photovoltaic systems, particularly those linked to the grid, have been developed in reply to an increasing demand of a renewable and clean energy [14], the aim is that the system must be economically attractive, the components for PV installation have a great influence on the system cost and its lifetime, and thus each part of the system must be well optimized and configured [15] [16].

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Optimal sizing of array and inverter for grid-connected photovoltaic systems

Cited by 150 publications

References 10 publications

The effect of low insolation conditions and inverter oversizing on the long‐term performance of a grid‐connected photovoltaic system

The effect of low insolation conditions and inverter oversizing on the long‐term performance of a grid‐connected photovoltaic system

Complex method for performance prediction of photovoltaic systems

Economic Sizing of a Grid-Connected Photovoltaic System: Case of GISER research project in Morocco

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