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The Photovoltaic microgrid is one of the most important and developing research area in the power system and around the world. Photovoltaic microgrid has demonstrated the ability to provide higher reliability and power quality than utility power system and improves energy utilization. The main requirements of photovoltaic microgrid should maintain constant voltage and frequency, balanced real and...
Microgrids are proving themselves viable to address the need for more reliable renewable power systems. They can improve the resilience of the overall system in case of abnormal conditions. The city of Spokane in Washington, is considering establishing a microgrid using existing transmission and distribution infrastructure. This microgrid will be supplied solely from the existing hydroelectric generators...
Since the last decade, distribution networks are facing a continuously growing penetration of distributed generation, mostly thanks to the “clean energy” incentives promoted by national governments. In particular, these initiatives have enhanced the presence of renewable-based generators in electricity grids. Taking advantage of their intermittent nature, the curtailment of a small portion of production...
LabZERO is a multidisciplinary laboratory located at Politecnico di Bari and ENEA Centro Ricerche di Brindisi aimed to promote energy efficiency and renewables in both urban and industrial districts. The lab activities are oriented to provide fast-prototyping, instrumentation, methodologies and equipment for material characterization of new components in the field of energy efficiency, micro-generation,...
The interconnection of distributed generators (DG) to existing network may give rise to many technical problems. To ensure appropriate power quality and stability of the grid these problems should be recognized and solved. For this purpose, behavior of such energy sources, under various disturbances, must be studied and known to the distribution grid operators. In this paper fault current contribution...
This paper presents the design and control of a distributed generation system using wind and solar PV (Photovoltaic) energy sources feeding to a 3-phase 4-wire network. The wind energy conversion system consists of a wind turbine coupled to DFIG (Double Fed Induction Generator) equipped with MPPT (Maximum Power Tracking technology). The MPPT demands speed control which is realized using vector control...
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, 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...
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