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In this paper, we study a system consisting of a photovoltaic (PV) array panel, dc_dc boost converter and a load (resistor). The control strategy is based on the robust integral backstepping control design to be applied to the dc_dc boost converter in order to maximize the power of the solar generating system, it allows a direct control of the power converter. In order to improve the robustness and...
The small scale power networks i.e. microgrids are trending due to their various advantages including seamless integration of renewable energy resources. Microgrids are developed using diverse techniques depending on geological, technological factors. As a result, a complex network of various types of microgrids formed around the globe. And there are no set standards or policies to categorize and/or...
In this work, we analyze the design and simulation of the electrical operation of a photovoltaic (PV) system adapted by a numerical intelligent controller (MPPT controller) ensuring the pursuit of the maximum power supplied by the photovoltaic generator despite the change of weather conditions. Particularly, we present the effect of meteorological conditions on the performance of a photovoltaic generator...
In this paper, we present a design and implementation of an energy management system for stand-alone micro grid supplied by multi-sources. This system which controls several mixed sources of energy such as Photovoltaic panel, wind turbine, diesel generator and Battery pack equilibrates efficiently the production to the load (consumption). The actual system design is based on a microcontroller board...
The Work presented in this paper concerns the optimization of the performance of a photovoltaic system with MPPT controller, Specifically, we present and we analyze the simulation of electrical operation of a photovoltaic (PV) system adapted by a numerical control (MPPT control) based on a PIC microcontroller that will ensure the continuation of the maximum power output of the Photovoltaic generator...
This article studies an autonomous photovoltaic system. The main purpose of this work is to describe a renewable energy system that operates separately from the grid. The components include photovoltaic panels, a dc/ dc buck converter with MPPT and a load. Generally, this system is used in remote sites. The electrical photovoltaic panels must be able to supply energy, including when there is no more...
Decentralized electricity production from renewable energy sources provide a great benefit of security of supply for consumers while respecting the environment. The load fluctuations according to daily or annual periods and of pumping head are not necessarily proportional to resources. For remote areas, the solution to adopt is maybe the coupling between several various sources of energy. In this...
This When the power generated by the distributed power generation system matches with the consumed power of the local loads, and the load phase angle is equal to the angle of the current disturbance, even if the islanding occurs, the voltage frequency at the point of the common coupling (PCC) always keeps in non-detecting zone (NDZ). A detection method based on the alternate current disturbance (ACD)...
In this paper, simultaneous control of active power and volt/var is explored with photovoltaic (PV) generators in distribution systems. The PV active power output can be controlled in the load-following mode when sufficient solar power is available to supply a local load, or the maximum power point tracking (MPPT) mode when a local load is large or injection to the system is allowed. Two selected...
In this paper, two control strategies involving “continuous” and “ON/OFF” operation of the diesel generator in the solar photovoltaic-wind-diesel-battery hybrid systems are modeled. The objective of these proposed models is to minimize the system's daily operation cost while finding the optimal power flow considering the intermittent solar and wind resources, the battery state of charge and the fluctuating...
The objective of this paper is to improve the performance of limited power point tracking (LPPT) of photovoltaic plants. The limited power point tracking refers to controlling the power output of a photovoltaic array at a level below the maximum power point. The limited power point tracking exhibits advantages over maximum power point tracking (MPPT) both in terms of economy and system security. The...
The characteristics of power system's operation mode in China are the mass production and centralized scheduling. However, the production operation mode may not only causes large-scale blackouts, but also consumes a lot of coal resources and exhausts mass of pollutants. Then, people turned to the micro grid which uses clean energy. This paper realizes the basic economic dispatch function of the system...
With the problem of energy security, increasing prices of carbon-based energy sources and minimizing global warming, shipping industry have invested a great interest in developing “Green Ship” by utilizing the new energy technologies, such as nuclear energy technologies, wind energy technologies, solar energy technologies and tidal energy technologies. Among the renewable energy sources, the abundant...
In this paper a study of an electrical distribution grid with presence of renewable energy sources performed using the Power System Analysis Tool is presented. The paper describes the load flow analysis of a real existing grid owned by the Italian DSO “ENEL Distribuzione SpA” and located in an urban area.
In this study, as a new index of facilities, business continuity capability on occasion of an energetically isolated operation, was defined and evaluated for the facility with a rich amount of resources such as private generators, a battery energy storage system and a PV generation system. A methodology was proposed to evaluate a duration during which the facility is self- sustaining regarding energy...
This paper proposes a control strategy for the distributed generation based on isolated system, which consists of diesel generator, photovoltaic (PV)generator and battery. The diesel generator is used being a main energy source, but the photovoltaic generation is chosen as an additional power source due to the growth of the load demand and for establishing an isolated microgrid. The control of microgrid...
This paper aims to forecast the photovoltaic power, which is an important and challenging function of energy management system for grid planning, scheduling, maintenance and improving stability. Forecasting of photovoltaic power using Artificial Neural Network (ANN) is the main focus of this paper. The training algorithm used for ANN is Extreme Learning Machine (ELM). Accurate forecast of Renewable...
This paper proposes a battery energy management system (BEMS) for photovoltaic (PV) powered micro-grid, where the system would like to reduce the operational time of diesel generator (DG). Due to fast variations in the solar irradiance, the BEMS need to smooth the PV power fluctuations. Hence, an energy storage system is required to mitigate the PV power fluctuations. Novelty of this BEMS is to manage...
In this paper, a control of a photovoltaic system connected to the grid is presented. The main components of the studied system are solar arrays connected through a DC bus to a grid side inverter. Due to the instantaneous changes of solar irradiance and temperature, maximum power point tracking (MPPT) is integrated in the inverter control. The energy generated by the grid photovoltaic system is sent...
Photovoltaic plants are complex systems operating in variable conditions. Their performances can be deteriorated by many factors such as shadows and mismatch phenomena. In this case, a suitable device able to control and condition the produced power is needed. A power optimizer could represent an adequate solution since it is capable of regulating the PV generator output impedance to reach the maximum...
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