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The grid-connected photovoltaic-battery hybrid system is widely used in modern communities. Based on the hybrid system, customers' energy demand can be satisfied by renewable energy or battery, then their electricity cost can be reduced. When disturbances on solar energy and load demand occurred, pre-designed control strategy cannot fit system requirements in terms of optimality and safety. In this...
Areas missing wide electricity grid deployment require set-up of local and small scale grids (nano-grids) covering individual or group of houses. Such systems require a performance/cost optimisation. A simulation has been developed to evaluate management algorithms. A 15 % optimisation through the use of simple predictive algorithms is demonstrated.
The paper presents an approach to making the complete energy management diagrams for a system composed of renewable energy generators, utility-grid connections and a number of various energy storages. The method is very general and can be applicable to almost arbitrary system configuration that can be defined by components and rules. The system components are categorized according to their roles (source/sink/both),...
Plug-in electric vehicles are the driving force behind a paradigm not only in the auto industry but also in the electric power sector. This paper explores the possibility of plug-in electric vehicles serving as electrical energy storage (EES) devices in a microgrid-in the so called vehicle-to-grid concept in Ghana. A vehicle-to-grid technology assisted microgrid is proposed as a solution to address...
This paper proposes a novel single-switch dc/dc converter for the future renewable electric energy delivery and management system to implement the distributed renewable energy resources (DRER). The DRER is responsible for the maximum power point tracking of the photovoltaic panel (PV) module and also for the control of central energy storage device. Due to the characteristics of the PV module and...
The increase in penetration of renewable energy sources, such as solar or wind, and high peak load demand can cause grid network security issues. The incorporation of demand side management and energy storage devices can provide a solution to these problems. This paper presents a proposed adaptive power flow control (APFC) strategy which reduces peak grid demand, increases self-consumption of renewable...
A multiple input non-isolated DC-DC converter with improved reliability is presented in this paper. The proposed converter can supply energy from storage and renewable energy sources independently to the load. It can work in buck, boost and buckboost modes depending on the operating conditions. It has the ability to maintain constant output voltage during transient conditions of load as well as source...
This paper presents a design scheme of controlling/optimization system for hybrid solar — wind renewable energy sources, its transmission, charging — discharging battery energy storage system and connectivity to the grid distribution. The voltage base self — intervention technique is employed for hybrid solar — wind renewable energy sources and battery energy storage system. The hierarchical switching...
The work describes the modeling and simulation of a renewable energy based hybrid power system in the aspects of improving power quality and system reliability. An Energy Management and Control Unit (EMCU) is also proposed. For meeting the sustained load demands during varying natural conditions, different renewable energy sources and converters need to be integrated with each other. The paper focuses...
Photovoltaic PV panels are traditionally arranged in more than one modules in order to increase the power system; with the purpose of obtain the maximum power point a converter for each panel could be used, or a multi-input converter that is able to control independently each input. In this paper is proposed a multi-input topology based on the Flyback converter with the capability of regulate independently...
As it is known, Hybrid Renewable Energy Systems (HRESs) development are aimed to increase the productivity and optimize the power generation produced by one or more connected sources. Such HRESs are always integrated with some kind of energy storage systems to satisfy the load demand during the Off-Period condition of the renewable energy sources. Off-Period condition can be categories into two phases:...
The objective of this work is to provide the continuous AC power supply by using semi-isolated multi input converter (S-MIC) for hybrid PV/WIND power charger system. The DC output from the hybrid charger system will be boosted and converted it into AC. This S-MIC converter provides the system very simple in design, delivers continuous power, and it also reduces the cost of the system. The boost inverter...
This paper describes a model of a smart street light that can work autonomously, save energy and can be seamlessly integrated with the existing grid. The street light incorporates a Light Emitting Diode array and an ARM Cortex M0 based microcontroller, both of which are powered by a combination of a solar panel and battery pack. The microcontroller executes an astronomical time switch based estimation...
We consider a two-tier urban Heterogeneous Network where small cells powered with renewable energy are deployed in order to provide capacity extension and to offload macro base stations. We use reinforcement learning techniques to concoct an algorithm that autonomously learns energy inflow and traffic demand patterns. This algorithm is based on a decentralized multi-agent Q-learning technique that,...
This paper proposes a novel PV module integrated system with energy storage capability. The topology is based on the Future Renewable Electric Energy Delivery and Management (FREEDM) System, where Distributed Renewable Energy Resources (DRER) comprised by a single power stage, are responsible for the Maximum Power Point Tracking (MPPT) of each PV module and also the charging method of a centralized...
Development of Len Bi-directional Inverter 15 kW (LenBDI15K-1P) and Len Battery Solar Charger 65 A (LenBSC65A-240V-BO) will be presented in this paper. These two products are used as power converter for 15kW solar off-grid power plant. The bi-directional inverter is using single phase full-bridge topology with a PI controller for inductor current and unbalanced d-q frame controller for voltage output...
Solar energy and wind energy are highly depended on the climate. So, the available power is discrete. Hence two different renewable energy sources could be combined to get a demanded load power. Hence the system is known as a hybrid power system. Instead of several independent converter, in hybrid system multiple input converter have simple circuit and low cost. But multiple input converters have...
In this paper, power control method is proposed when power converters are configured in parallel for increasing power capacity. Each module and load is transformed by equivalent circuit model. And power is controlled through the equation. Power control method can be controlled power of each module and reduced circulate current. Proposed power control method is applied to power converter modules for...
One of the most important key components of intelligent power grids is the distributed energy storage. On the other hand the electrification of person transport vehicle seems to be a inevitable trend. Thus an attractive way to store the energy of the grid is to use the onboard battery of these electric vehicles by connecting them to the grid “Vehicle to Grid (V2G)”. The conventional way to do this...
Due to environmental conditions and the particular pattern of economic development, masses from all across the world have turned towards different types of energy sources for meeting their energy demands. But the lack of integration in between these sources is an important factor to be taken into consideration. In this study the incorporation of different energy sources on a single node is discussed...
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