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This paper proposes to use a combinatorial optimization technique, the branch and cut algorithm, to design an hybrid isolated microgrid in the Colombian community of Unguia. In addition, this paper presents a comparison between the designs obtained with the branch and cut algorithm, the software HOMER and a genetic algorithm for the Unguia community. The proposed microgrid includes two diesel generators...
The world has grown quickly and almost all the transportation equipment work with fossil fuels. Since electrical energy can be generated from clean and efficient sources, the world energy consumption should change to electric type. Charge stations should be bidirectional so that power could be transferred from grid to vehicle and vice versa. In this condition, the grid is prone to new kind of challenges...
In this paper, it is proposed a robust Second-Order Super-Twisting Sliding Mode Control for a Grid-connected inverter of a PV power plant. The proposed control strategy is able to maximize the energy extracted from the PV while regulating the DC-link voltage and achieving a power factor compensation and the reduction of currents harmonic distortion. Both in balanced or unbalanced condition, the grid...
This paper proposed a novel PV faults diagnosis method, which is based on the structure of differential power processing (DPP). Since the conventional PV faults diagnosis methods are very easily affected by the working environment conditions, such as solar irradiance and temperature. Compared to the conventional methods, this method is able to diagnose several PV modules at the same time. Furthermore,...
A micorgrid is a small size distribution grid that integrated various on-site distributed energy sources to satisfy the local energy demand. A microgrid can either be connected to the main utility grid or operate in islanded mode. The technical, economic and environmental benefits associated with microgrids have led to extensive research in this area. However, development of advanced planning and...
This paper proposes a new control scheme for a permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS). In this scheme, the generator and grid currents are controlled using a hysteresis current controller (HCC). The control system of the back-to-back converter based on the HCC is described. Modeling and simulation of the system are developed using Matlab/Simulink to...
Smart grid technology is the key for an efficient use of distributed energy resources. There prevails a steady increase of power demand due to urbanization and industrialization. Distributed Generation (DG), a rational idea to reduce the burden on the centralised grid and increase the grid reliability. DG gets an appealing picture when many renewable sources are integrated with one another and complements...
New technologies are developing very faster than before and also technologies changed rapidly needs of people according to the use of technology. To understand the meaning of the benefits that renewable energy can bring we must firstly establish our understanding of the concept. The future of the developed and developing countries in the world depends on the availability and transport of energy. It...
Lithium-Ion Capacitors (LICs) are a new technology of hybrid supercapacitors that aims to deliver relatively high energy and high power. Therefore, they are known for their constitution inspired from lithium-ion batteries and conventional supercapacitors. Due to their hybrid structure, they have a unique behavior during aging. This paper concerns the effects of high temperatures (60°C and 70°C) and...
The paper deals with a Second Order Variable Structure Control (VSC) for Wind Turbine PMSG-based and Generator-side Converter System. By means of the proposed control and the associated sliding observer, a vectorial control of PMSG generator is recognized while maximum power point tracking by the renewable source and DC voltage control of the generator-side converter are assured to maintain a high...
In this article, a current control algorithm is conceived for converting solar dc power into ac power of high-quality. This conversion is based only on a dc-ac converter, avoiding the use of two stage converter. The proposed algorithm is founded on tracking the maximum power point which ensures controlling the electrical power exchanged with the grid. To assure a good dynamics and reduce the control...
Differential power processing (DPP) is a promising architecture to solve an issue caused by mismatch among PV modules. PV to non-isolated port bus (or PV to the virtual bus) is one of the topologies studied in DPP architecture that allows each DPP converters can achieve maximum power point tracking (MPPT) independently. The string current value does not have an effect on MPPT but relates to the power...
Exchangeable battery systems (EBSs) are one of the charging solutions for electric vehicles (EVs) and are attractive for public transportation vehicles such as buses and taxis, because only a few minutes are required to swap the batteries. EBSs can efficiently make use of renewable energy, since the batteries can be charged while the EVs are on the road. However, how much renewable energy can be used...
Conventionally power flow of transmission and distribution network is calculated separately. With the increasing penetration level of distributed generation (DG), such as photovoltaic and wind power, voltage and power characteristics of tie bus become complicated. The tight coupling problem appears between transmission and distribution network. As a consequence, the power flow calculation must be...
Based on the inductive power transfer (IPT), the contactless approach allows safe and comfortable operations of battery charging for Electric Vehicles (EVs). In this paper, a contactless system particularly suitable for E-bike battery charging is proposed. A practical realization of the system has been carried out, aiming at the system evaluation in terms of working and efficiency. Through a phase...
Many problems in the electricity demand of grid caused by the increases in the population. Moreover, the use of the conventional sources does not meet consumer demand. In this case, the use of renewable power will be very economical and beneficial to provide the required energy of consumers. In addition to that, smart grid is supposed to improve the quality and safety of renewable energy system through...
Smart grid systems include many different power sources such as renewable and fossil energy basis. While collecting all type of energy on the grid, phase order, frequency, maximum voltage value and synchronization time of each power station should be known for a smooth operation of the smart grid. Therefore, the detection of peak values of grid voltages will help the smart grid operators to connect...
Increasing environmental pollutions, lack of power in remote places and demand for more energy makes us to seek new energy sources. Wind and solar hybrid energy have being popular ones owing to abundant, complement nature, ease of availability and convertibility to the electric energy. For hybridizing solar-wind system DC-AC or separate DC-DC converters are used one for each source. They will be connected...
For a high penetration of intermittent renewable energy sources, they may cause transmission-line congestion problems in power systems. In particular, among the current forecasting methodologies for renewable generation, an extremely large (but rare) forecasting error in the renewable generation inevitably occurs. In a previous paper, the authors developed a line current variation model to represent...
The use of fossil energy has caused air pollution, energy crises, and it is not environmentally friendly. So, that is necessary to find alternative energy from biomass materials. Indonesia has the potential of developing alternative energy with a huge natural resource. Examples of mass bio energy developed such as: Jatropha, Palm, and Nyamplung (Calophyllum inophyllum L) oils. To assist the development...
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