The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Integrated energy supply system of pelagic clustering islands (IESS-PCI) can meet the load demand of the main island more effectively. It strengthens the sense of cooperation between the islands and improves the stability of renewable power supply. It provides a more reliable mode of operation for pelagic clustering islands. The operation mode of IESS is introduced and the preliminary planning of...
A home solar power system for micro electric vehicles (EVs) is one of the important technologies to realize a sustainable energy society. The aim of this paper is a demonstration of a high performance digital control phase-shifted full-bridge converter connected between solar panels and the dc-bus line. Since the voltage in a home storage battery and EV battery is around 72V in some products, the...
The purpose of this paper is to present an estimation method of an optimum capacity of a storage battery system by combined use of a renewable energy and emergency generators (EGs) installed in a large hospital The hospital is planning to install a photovoltaic power generation system (PV) due to reduce a cost of the power. When the PV is installed, the battery is also to being planned for stable...
This paper presents a comparison of optimum energy scheduling of emergency generators (EGs) of a large hospital with renewable energy system using mathematical programming methods. A large hospital has the EGs to keep a medical service when a power failure occurred in disaster In using the EGs, the hospital has to save the fuel consumption in island operation mode to drive the EGs as long as possible...
This paper discusses how to achieve high PV penetrations for a hybrid diesel-PV micro-grid via the means of a cloud forecasting system. The micro-grid control system utilizes cloud forecasts to forecast PV transients and manage online diesel generation. Simulation results for the test micro-grid showed that an array size of 2 MW achieved an energy penetration of 30.8% with «11.5 annual faults. Additionally,...
With the depletion of fossil fuels and skyrocketing levels of CO2 in the atmosphere, renewable energy sources continue to gain popularity as a long-term sustainable energy source. However, two major limitations exist that prevent widespread adoption: variability of electricity generated and cost of the equipment needed. A grid-tied photovoltaic (PV) / wind hybrid system with battery back-up can help...
This paper has the focus to identify the unknown parameters of solar photovoltaic generators in real time, through the application of a new proposed technic. The identification process is discussed with details, about the four steps of identification. In this regard, the first step explain the experimental data acquisition work, to obtain data from real photovoltaic system. For the second step, a...
This paper discusses the impact of the combined action of storage and energy distribution management on the improvement of self-consumption in the residential sector. The case study is a house that is equipped with a photovoltaic system with backup and connected to the network. Several configurations of the PV-batteries system were considered in order to determine the optimal configuration to satisfy...
The aim of this work is to present a novel fuzzy slide mode control (FSMC) to extract a maximum power point (MPP) of the photovoltaic (PV) generator. This technique allows tracking the MPP consequently for the different operating condition of radiation and temperature. The FSMC is simulated with Matlab/Simulink environment and compared with the perturb and observe (P&O) method. The tests results...
In Morocco, the use of renewable energies present have a great importance especially with the new energy strategy. The important geographical location of the Kingdom helps for the development of the use of the solar energy. To reduce the import of primary energy, and to make face to the high demand of electricity and water in remote zone, the government has made several projects to encourage the use...
For controlling distributed controllable units in radial distribution networks, a method based on alternating direction method of multipliers (ADMM) for dynamic distributed optimal power flow (DOPF) is designed. The convex DistFlow model for power flow is spitted into two layers. Based on power flow of distribution networks, distribution system operators (DSOs) in the upper layer calculate shadow...
In this paper the results of ten months monitoring of the microgrid supplied by the photovoltaic generator and operating in the Mediterranean area have been presented. The microgrid architecture and control strategy have been described. Further, the analysis of the energy exchange between the microgrid and the main grid have been analyzed. A particular attention has been given to the optimization...
In photovoltaic-battery systems, more attention is usually paid to the MPPT control while the battery management is put aside. This paper proposes two control strategies for an integrated PV-battery system, both of them making it possible to perform MPPT or regulate the battery voltage to its maximum value in order to prevent it from overcharging. Simulation results prove the feasibility of both controls.
The intermittent character of the photovoltaic generator, power electronic converters and load dynamic are the main factors leading operation instability in islanded microgrids. The necessity of the immediate control within the micro-source is very important since it impacts the interaction between micro-sources in the microgrid. This control level must be characterized by a fast and accurate response...
In this paper the impact brought by different demand sector profiles on the daily operational cost and optimal scheduling of grid connected photovoltaic system with bidirectional power flow is analysed for the specific case of Bloemfontein in South Africa. For this purpose, residential, commercial and industrial daily load curves are used to estimate daily load demands. For comparison purposes, three...
In this paper an algorithm for calculating the steady state of electrical networks including wind and photovoltaic generation is presented. The wind generators considered are; squirrel cage induction generator and doubly fed induction generator. The proposed algorithm is based on the formulation of nodal power injections that is solved with the Newton Raphson technique using complex matrices notation...
Photovoltaic generators can provide several benefits for distribution networks, such as power loss reduction, and improvements in voltage level. However, high penetration of these generators can cause voltage rise problems in the distribution network. In this way, voltage control strategies are necessary so that the voltage levels are within the range of operation for any load and generation conditions...
In this work, an analysis of grid parity for residential and commercial photovoltaic generators in an important city of Argentina is presented. The analysis includes installation costs, levelized costs of photovoltaic energy, grid electricity price and incentive programs that promote the insertions of those generators in low demand users. A specific analysis on the economic viability of low power...
A recent report from the German Energy Agency analyzes the possible introduction of the blockchain technology in energy transactions in power distribution. The issue deserves attention since the extensive digitalization of business models puts new challenges to utilities in the power sector. The German decision makers in the energy field claim that blockchain appears as a close perspective and, at...
This work provides the guidelines to calculate the size of the DC-link capacitor to contribute with additional energy - for a short period of time - than the photovoltaic panel can supply under normal operating conditions. First, a model of a three-phase electric generation system is used that combines photovoltaic panels and an inverter with an LCL filter at network side. In addition, a control algorithm...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.