Inferential statistics for monitoring and fault forecasting of PV plants

Vergura, Silvano; Acciani, G.; Amoruso, V.; Patrono, G.

doi:10.1109/isie.2008.4677264

Cited by 37 publications

(16 citation statements)

References 21 publications

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“…In literature (Zheng and Lyu, 2015;Yu, 1998;Littlewood, 1981;Randell, 1975), the optimal fault tolerance strategy reliable for the international trading system with the local and global constraints was studied, and a systematic and extensible framework was put forward, through which the best fault tolerance strategy could be selected in the design stage of the combined international trade. Literature (Vergura, Acciani and Amoruso, 2008) established the modeling of the problem studied as an optimization problem, and at the same time, converted the user's requirements into the local and global constraints, and also formalize the optimal fault tolerance strategy selection problem of the semantic-related task (hereinafter referred to as task for short) into a constraint of the optimization problem, and designed a heuristic algorithm (FT-HEU) to solve the optimization problem effectively. In literature (Mansour and Dillon, 2011), in the design stage of the gravitational field theory, the optimal fault tolerance strategy was selected at the same time when the atom international trade was chosen for each task (Mansour and Dillon, 2011).…”

Section: Introductionmentioning

confidence: 99%

International Trade Vector Model Based on Gravity Field Theory

2016

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zu

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In view of the low efficiency of the traditional international trade vector model based on gravity field theory in the integrated Internet environment, this paper has proposed a fast and reliable international trade vector model based on gravity field theory. The method first applies the gravity analysis to evaluate the international trade friction; and then adopt the multi-attribute decision-making theory to conduct trade mediation on the long-term conflicts in the international trade; finally, through the improved particle swarm optimization algorithm, to make compensation for the long-term conflicts in the international trade. The experimental results based the real data set show that, the proposed method is superior to other methods in the aspect of friction elimination rate, friction treatment time and the combined optimal degree.

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Section: Introductionmentioning

confidence: 99%

International Trade Vector Model Based on Gravity Field Theory

2016

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zu

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“…Even if energy data of a whole year are not available, it is possible to extract information about the population applying the procedure described in [9], while [10]- [11] propose a user-friendly Labview interface for an easy application of both the procedures. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Fig. 1 reports the flow-chart of the procedure in [9] which can be used utilizing as input dataset either the data population or the sampled data; once the dataset is defined, it will be utilized for the "Data entry" of Fig. 1 and the procedure will start.…”

Section: Introductionmentioning

confidence: 99%

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Bootstrap technique for analyzing the efficiency of PV plants belonging to a constellation

Vacca

Vergura

2010

2010 IEEE International Symposium on Industrial Electronics

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Frequently several PhotoVoltaic (PV) plants has to be monitored by an unique supervision centre (we can say that the plants constitute a "constellation" from the point of view of storing and transferring data). In this case the analysis of the whole population of data by means of statistical approach requires long time and it is not always possible. In the paper it is presented a procedure of analysis based on sampled data; this approach allows to detect if anomalies are present and which PV plant is interested. So, an in depth analysis (based on the population of data) will be carried out only for inefficient PV plants. The paper proposes a resampling method, so-called bootstrap, able to approximately describe the sampling distribution. Its peculiarity consists in taking information about the population of the data (whichever its distribution is) and giving quickly preliminary information about the operation of the PV plants.

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“…To locate disconnect in the PV module string the earth capacitance measurement method was developed in [3], another technique that can detect the change in transmission line impedance with string disconnect is known as time-domain reflectometry [4]. Some researchers used statistical methods such as analysis of variance test and nonparametric Kruskale-Wallis test explaining offline supervision and real-time monitoring of the system is accurate and can be used for remote monitoring of the plant is proposed [5]. Others used the climate data with the help of satellite for the remote monitoring and fault detection method of small grid connected systems is presented [6], while some used climate data measured by sensors installed on the plant.…”

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confidence: 99%

Two Variable Method for Fault Analysis in Grid Tied Solar Photovoltaic System

Khatri¹,

Kumar²

2017

IJET

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Abstract-To increase the efficiency and reliability of a grid tied solar PV plant, it is important to detect the possible abnormalities and their location in the system. Conventional power devices frequently fails to detect certain types of faults which occur due to inappropriate installation, varying plant conditions and environmental factors such as low irradiance, snow, clouds, bird dropping, dust accumulation. Therefore, it is necessary to identify a vital solution to deal with the internal and external faults of the system. The faults in photovoltaic modules, array strings and inverter sometimes leads to safety issues in the system. This paper proposes a simple two-variable method to detect faults under the abnormal operating conditions of grid tied solar photovoltaic system. Furthermore the internal and external faults are studied using an experimental setup and obtained results indicate the accurate analysis of the fault severity and the change in electrical parameters of the system can be observed and compared with the normal working condition of system. Keyword-Grid-Tied PV system, Inverter fault, Array fault, Fault detection.I. INTRODUCTION Popularity of photovoltaic systems is increasing rapidly worldwide due to the simplicity of installation, no fuel cost, less maintenance and long life. The energy produced by the plants depends upon various factors such as performance characteristics of plant components, geometrical configuration, electrical and mechanical parameter and weather conditions of the site and availability of amount of solar irradiance. The power production capacity of the grid tied photovoltaic (PV) plants ranges from few kilowatts to several megawatts depending upon their usage for domestic to utility scale. The maximum power production of plant reduces in case of abnormality in the system. The conventional protection devices of PV plant consist of over current interrupters, protection relays, ground fault and arc-fault protection devices frequently fails to detect the faults under certain conditions [1]. The challenge is to protect the system from the abnormalities due to protection equipment failure, environmental conditions, maximum power point tracker, blocking diodes and PV module shading. The faults in the system can be detected by comparing the actual electrical parameters which depend upon the system configuration parameters and meteorological data of the plant site with the expected quantities of the system [2]. Thresholds are defined considering PV array parameters such as the amount of irradiance incident at the normal of flat plate collector surface, ambient temperature and electrical quantities of the system so as to detect the presence of abnormalities. Currently, many researchers are working on identifying the techniques to detect the PV system faults in minimum possible time to eliminate them from the system. To locate disconnect in the PV module string the earth capacitance measurement method was developed in [3], another technique that can detect the change in transmis...

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Inferential statistics for monitoring and fault forecasting of PV plants

Cited by 37 publications

References 21 publications

International Trade Vector Model Based on Gravity Field Theory

International Trade Vector Model Based on Gravity Field Theory

Bootstrap technique for analyzing the efficiency of PV plants belonging to a constellation

Two Variable Method for Fault Analysis in Grid Tied Solar Photovoltaic System

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