Design of Grid-Connected Photovoltaic Systems and Technical Requirements in case of Grid Failure (original) (raw)

Simulation of photovoltaic grid connected inverter in case of grid-failure

In this paper, a behavioural model of photovoltaic grid connected system is presented and simulated. The photovoltaic generator and a single phase inverter are modelled both by the well known one diode model and a current controlled voltage source respectively. The indirect current control method has been applied to achieve the inverter current control in order to feed a sinusoidal current waveform to the ac grid. Finally, normal and faulty conditions of the photovoltaic generation, especially in the case of grid failure, were simulated and commented. Résumé - Dans cet article, un modèle comportemental d'un système photovoltaïque connecté au réseau est présenté et simulé. Le générateur photovoltaïque et un onduleur monophasé sont modélisés respectivement à l'aide du modèle bien connu à une diode, et d'une source de courant contrôlée en tension. La méthode de contrôle du courant indirect a été appliquée pour la commande du courant de l'onduleur afin d'injecte...

Modeling and Simulation of Grid-Connected Photovoltaic System

Applied Mechanics and Materials, 2011

Modeling and simulation of a grid-connected photovoltaic system (GCPS) is addressed in this paper to analyze its control performance and dynamics under changing irradiation. A circuit model of solar array considering irradiation is used to simulate its inherent characteristics and realized by a controlled current source. The controls of the GCPS and its electrical circuits are represented by user-defined and built-in components. The dynamic of the system in normal and fault conditions are dominated by its power controller and a method to set PI controller’s parameters is proposed in this paper. The model has been implemented on DIgSILENT. Simulation results are presented and compared with experiment waves to validate that proposed simulation model is effective for evaluation of the GCPS.

Modeling and Simulation of Grid Inverter in Grid-Connected Photovoltaic System

International Journal of Renewable Energy Research, 2014

This paper presents the development of inverter simulation model in Grid-Connected Photovoltaic System (GCPV) in Matlab/Simulink software. This work is a part of the development of a complete GCPV system simulation model. The inverter simulation model accepts solar irradiance and temperature parameters as inputs (at PV array) and outputs AC power. A phaseshift control method is used to ensure that the inverter output is synchronized with unity power factor to the utility grid. The developed model is validated against data obtained from an actual installed GCPV system at Malaysia Green Technology Corporation (MGTC) in Bangi, Malaysia with system capacity of 45.35 kWp. The validation of model is through Root Mean Square Error (RMSE) and Mean Absolute Percentage Error (MAPE). Results showed that inverter output power from simulation is acceptable with small deviation from the actual data. This is due to inaccuracies of predicting de-rating factors listed in this work.

MODELING SIMULATION AND PERFORMANCE STUDY OF GRID CONNECTED PHOTOVOLTAIC ENERGY SYSTEM

This paper presents Modeling Simulation of grid connected Photovoltaic Energy System and performance study using MATLAB/Simulink. The Photovoltaic energy system is considered in three main parts PV Model, Power conditioning System and Grid interface. The Photovoltaic Model is inter-connected with grid through full scale power electronic devices. The simulation is conducted on the PV energy system at normal temperature and at constant load by using MATLAB.

Modeling & Simulation of Grid Connected Photovoltaic System Incorporated With Insolation & Temperature Variation

Photovoltaic systems are designed either to feed the grid or for direct consumption. Due to global concerns on environment issues, the 21 st century has seen a significant growth of grid-connected installations. Photovoltaic plants connected to the utility grid contain several elements like PV modules, power converters, electric protection apparatus and monitoring devices in order to ensure secure power generation. Since the PV modules produce direct current, an inverter is necessary to interface with the alternative voltage utility grid. The power generated by solar photovoltaic (PV) module depends on surrounding irradiance, temperature and shading conditions. This paper presents modeling of Photovoltaic system of grid connected PV system using MATLAB/Simulink. Each component in the system like boost converter, inverter is modeled and simulated separately and the results are also shown for each model .The complete system model is given at the end with the results. Module model is verified by data given in the literature. The complete system modeled shows voltage output as 220V and 50 Hz frequency.

Fault Analysis of Grid Connected Photovoltaic System

American Journal of Electrical Power and Energy Systems, 2016

A new method of current control strategy for grid connected photovoltaic (PV) system is presented in this paper. The connection of photovoltaic system with the grid is a difficult task as the solar irradiation is a nonlinear quantity. The objective of this work is to develop a model of the photovoltaic system with maximum power point tracking (MPPT) system connected to 11 KV grid by implementing new control technique so that maximum active power transfer from PV to grid can be taken place without injection of harmonics. The considered system consists of a PV system, MPPT controller, boost converter, voltage source inverter (VSI), 3-Φ filter, a control system, a distribution network, load and grid. In the beginning, a model of a photovoltaic array was developed and then a MPPT controller and a direct current to direct current (DC-DC) converter are designed. To connect PV system to grid, a power electronics converter is needed which can convert DC voltage into three-phase AC voltage. Three-phase VSI using insulated gate bipolar transistors (IGBTs) is used. By means of a step-up transformer and filter, this three-phase VSI is connected to the distribution network. The proposed control of the three-phase grid-connected solar PV system is designed in the synchronously-rotating d-q reference frame. Here, V dc is measured, then compared with V dcref and accordingly the error is fed to proportional-integral (PI) controller from which I dref is generated. As PV system should inject only active power, so reactive power injected to grid is made zero by making I qref zero. There after the final model is simulated by using MATLAB/SIMULINK and different output waveforms are analyzed for different conditions. Finally the fault analysis is carried out to observe the behavior of the system.

Simulation of grid connected photovoltaic system using MATLAB/ Simulink

—In this paper, a whole simulation model of grid connected PV system with the practically of harmonics compensation is introduced during the simulation. The simulation model of grid connected PV system embrace a PV array, a dc to dc buck boost converter and a dc to ac inverter. Grid connected PV system is electricity generating solar system that is connected to the utility grid. Within the world, energy sources just like fossil fuels and nuclear reaction area unit wide used for electrical power generation. However burning fossil fuels and nuclear area unit wide used for electrical power generation. we tend to get I-V & P-V characteristics of the model. These are often desired by mathematical equation that is nonlinear. Keywords—Grid connected PV systems, DC-DC buck boost converter, DC to AC inverter, MPPT.

Performance Investigation of Grid Connected Photovoltaic System Modelling Based on MATLAB Simulation

2018

Photovoltaic (PV) systems are normally modeled by employing accurate equations dealing with a behavior the PV system. This model has Characteristic of PV array cells, which are influenced by both irradiation and temperature variations. Grid-connected PV system is considered as electricity generated solar cell system which is connected to the grid utilities. This paper characterizes an exhibiting and simulating of PV system that executed with MATLAB /Simulink. The impact of solar irradiances as well as ambient temperature performances of PV models is investigated and noted that a lower temperature provides maximum power higher so that the open circuit voltage is larger. Furthermore, if the temperature is low, then a considerably short circuit current is low too. 1. INTRODUCTION The vast improvement of the recent common economy is a crisis factor of energy as well as the environment, that needs to decrease the requirement on conventional energy besides level improvement of utilization and enlargement of the energy resources such as renewable gradually [1], [2]. By concentrating on renewable source types, solar photovoltaic (PV) can be considered as the main contributors in the world energy sources due to unlimited offer features of power generation in addition to its clean (i.e. no emitted pollution and considers100% environment friendly), therefore it may be a completely renewable energy technology which has afforded an expansion potential in addition to their world's quickest developing industries [3], [4]. A photovoltaic (PV) system utilizes a solar cell for converting the solar energy to electricity with depends on the photoelectric effect. PV system basically is a cell which may be classified as mono-crystalline, poly-crystalline, organic cell, amorphous, and Nano-PV cells. Now the technology of PV can be used in various applications like plants of solar power, PV grid-connected, home-produced usage, power communication, satellites, and currently aircrafts as well as electric vehicle applications [5]-[7]. In applications of photovoltaic (PV) system, it's necessary to design a comprehensive system to activate the solar cells (SCs) with optimal conditions and maximum efficiencies. The Maximum power point (MPP) is changing greatly with depending on the sunlight angle on the panel surface in addition to cell temperature, therefore the MPP may not be considered as the load operating point of PV system. PV systems can be designed for comprising many required modules with the purpose of supplying reliable energy for the grid [8], [9]. The feeding of electricity by Grid-connected PV systems are directly active with electrical network and working in parallel with a conventional power source. These systems had been satisfying an exponential

Fault Analysis of Grid Connected Solar Photovoltaic System

International Journal for Research in Applied Science and Engineering Technology -IJRASET, 2020

A new method of present control strategy for the photovoltaic (PV) system connected to the grid is presented in this paper. The connection of the photovoltaic system with the grid is a difficult task because the solar radiation is a nonlinear quantity. The purpose of this work is to create a photovoltaic system is to develop a model in which maximum power point tracking (MPPT) system is implemented by implementing new control technology. The considered system includes a PV system, MPPT (incremental conductance) controller, boost converter, voltage source inverter (VSI), three phase filter, a control system, a distribution network, load and grid. Initially, the model of photovoltaic array was developed and then designed from an MPPT controller and a DC-DC boost converter. To connect the PV system to the grid, a power electronics converter is required which can convert the DC voltage to AC voltage in three steps. After that there is a simulation of the last model using MATLAB / SIMULINK and different output waves are analysed for different conditions. Finally, the fault analysis system is found to inspect the behaviour.

MATLAB Simulation of Grid-Connected Photovoltaic System

ICEST Conference, 2020

In this paper work will be briefly covered the principle of operation of photovoltaic system, the procedure of integration of such power plants in the power system, their impact on the system and the technical norms that they should meet. Furthermore, the numerical results obtained from the simulation of a photovoltaic system conducted in Simulink will be shown and commented on. Along with this, the model with which the simulation was made, which was made on the basis of a real photovoltaic system owned by the Technical Faculty - Bitola, will be discussed.