Design Of Hybrid Power System Research Articles

A process integration targeting method for hybrid power systems

Pinch Analysis is a well-established methodology of Process Integration for designing optimal networks for recovery and conservation of resources such as heat, mass, water, carbon, gas, properties and solid materials for more than four decades. However its application to power systems analysis still needs development. This paper extends the Pinch Analysis concept used in Process Integration to determine the minimum electricity targets for systems comprising hybrid renewable energy sources. PoPA (Power Pinch Analysis) tools described in this paper include graphical techniques to determine the minimum target for outsourced electricity and the amount of excess electricity for storage during start up and normal operations. The PoPA tools can be used by energy managers, electrical and power engineers and decision makers involved in the design of hybrid power systems.

Design of Hybrid Power System of Renewable Energy for Domestic Used in Khartoum

Design of Hybrid Power System of Renewable Energy for Domestic Used in Khartoum

Design of an autonomous renewable hybrid power system

This paper presents the development of an optimisation model for the design of an autonomous solar-wind hybrid system in combination with battery bank and diesel generator. The performance of solar and wind system is evaluated using new practical mathematical models, in combination with hourly measured meteorological data. Loss of power supply probability technique is used as a key system parameter to assess the reliability and net present cost of the system. A novel penalty function is used for low reliability level in the cost calculation. Methodology used in this model allows quick identification of optimal design based on user’s desired reliability level and techno-economical performance of the system. The programme has been developed using energy balance calculation method in MATLAB 7.0 environment.

Design and Analysis of Hybrid Power Systems with Variable Inertia Flywheel

The purpose of this study is to analyze and to design for the hybrid power systems with variable inertia flywheel while the hybrid power system consists of 1 power plant, 1 variable inertia flywheel which is used as the energy storage device, a planetary gear set, and a set of actuators. First, the kinematic and kinetic equations of the hybrid power system are developed in order to establish the relationships of the speed and torque of all elements, and the specific speed and torque of the output needed for the vehicle can be found by using the software “ADVISOR” in various operation modes. Then, with the prescribed mechanical brake energy recovery system model and a control model, a comprehensive analysis can be achieved. Finally, various driving modes, such as ECE, ECE+EUDC and New York Bus driving mode are investigated in order to demonstrate the characteristics of the hybrid power system. The numerical results show and conclude the effectiveness of the variable inertia flywheel, and the improvement on the efficiency of hybrid power systems. Copyright Form of EVS25.

Advances in Design of Solid Oxide Fuel Cell Hybrid Power Systems for Underwater Applications

A hybrid propulsion system for torpedo propulsion applications was developed. The hybrid system utilizes a solid oxide fuel cell (SOFC) to provide low power propulsion and hotel loads supplemented by a high power turbine for high speed pursuit, with both systems using common fuel and oxidant sources. A solid LiClO4 oxidant source was investigated. Individual subsystems including the SOFC stack and LiClO4 oxidant source were physically tested. Trade studies were performed comparing various fuel, oxidant, low power, and high power sources, based on testing performance of the subsystems. The SOFC low power system was demonstrated to provide the longest low power range while maintaining the necessary high power reserve for target pursuit.

Hybrid power systems – An effective way of utilising primary energy sources

Nowadays in many countries the increase of generating capacity takes place in small units within the framework of so-called distributed power industry (distributed generation – DG, embedded generation), and among them in hybrid power systems (HPS). In this paper we present our experience of the design, build and exploitation of HPS in the Institute of Electrical Power Engineering, Warsaw University of Technology. The following major subjects are considered: ■ the experience of exploitation of a hybrid solar – wind power plant, ■ a solar power plant with a fuel cell, ■ the concept of a wind power plant with a battery energy storage, ■ the utilisation of a DC micro-grid for the integration of different electrical energy sources.

Design, economic analysis and environmental considerations of mini-grid hybrid power system with reverse osmosis desalination plant for remote areas

This paper discusses the design process of a mini-grid hybrid power system with reverse osmosis desalination plant for remote areas, together with an economic analysis and environmental considerations for the project life cycle. It presents a design scenario for supplying electricity and fulfilling demand for clean water in remote areas by utilising renewable energy sources and a diesel generator with a reverse osmosis desalination plant as a deferrable load. The economic issues analysed are the initial capital cost needed, the fuel consumption and annual cost, the total net present cost (NPC), the cost of electricity (COE) generated by the system per kWh and the simple payback time (SPBT) for the project. The environmental considerations discussed are the amount of gas emissions, such as CO 2 and NO x , as well as particulate matter released into the atmosphere. Simulations based on an actual set of conditions in a remote area in the Maldives were performed using HOMER for two conditions: before and after the Tsunami of 26th December 2004. Experimental results on the prototype 5 kVA mini-grid inverter and reverse osmosis desalination plant, rated at 5.5 kWh/day, are also presented here to verify the idea of providing power and water supplies to remote areas.

GENETIC-BASED SIZE OPTIMIZATION OF RENEWABLE ENERGY SOURCES

This paper presents an optimized design of a stand-alone multisource hybrid power system. The power system includes such sources as wind farm, photovoltaic array, diesel generator, and battery bank based on an evolutionary algorithm. In this work, the battery bank has been used to cover the emergency loads energy. For this approach, economic aspects such as interest rate, inflation, capital recovery factor, and sinking found factor are expressed for each power source, and then an objective function with the aim of minimizing of all system costs is clarified. A genetic algorithm approach is employed to obtain the best cost value of hybrid power system construction. Simulation results show this method calculating the electrification costs (capital cost, replacement costs, operation and maintenance cost, and fuel cost) over a period of 20 years for two different cases.

Design and Optimization of Hybrid Power Systems for Fully Implantable Medical Devices

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Design and Optimization of Hybrid Power Systems for Fully Implantable Medical Devices

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Design requirements for medium-sized wind turbines for remote and hybrid power systems

This paper provides an overview of the design requirements for medium-sized wind turbines intended for use in a remote hybrid power system. The recommendations are based on first-hand experience acquired at the University of Massachusetts through the installation, operation, and upgrade of a 250-kW turbine on a mountain top with difficult access in Western Massachusetts. Experience with the operation of this turbine and the design of its control system, together with a long history in the design and analysis of hybrid power systems, has made it possible to extend the work in Western Massachusetts to remote or hybrid power systems in general. The University test site has many attributes of more remote sites and the overall wind turbine installation is typical of one that could power a hybrid wind system. For example, access to the site is limited due to steep terrain, snow, and environmental restrictions. Also, the power lines feeding the turbine exhibit voltage sags and phase imbalance, especially during start-up. This paper is based on the experience gained from the operation of this wind turbine and assesses the requirements for the design and operation of medium to large wind turbines in remote locations. The work summarizes lessons learned relative to: (1) sensors, communication, and control capabilities; (2) grid connection issues; and (3) weather-related problems. The final section of the paper focuses on design requirements to ensure successful installation and the completion of maintenance and repairs at remote sites.

Hybrid wind/PV/diesel system experiences

The past ten years have seen significant developments in the design, analysis and installation of hybrid (wind/PV/diesel) power systems. This paper presents a summary of recent progress on this subject in the United States with emphasis on the analytical and experimental work carried out at the University of Massachusetts. Topics discussed here include: 1) System configuration and hardware, 2) Modeling and design tools, and 3) Recent applications.

Hybrid wind/PV/diesel hybrid power systems modeling and South American applications

This paper presents an applications case study and comparison of performance results between two computational models for simulating the performance of hybrid power systems. The first model, HYBRID2, was developed at the University of Massachusetts under National Renewable Energy Laboratory (NREL) sponsorship. The second model, SOMES, was developed at Utrecht University in the Netherlands. Both models have been designed to predict the technical and economical (life cycle cost) performance of hybrid power plants that typically might be comprised of renewable energy sources, a battery bank, and a diesel generator. A South American (Brazil) based hybrid power system used to power a remote telecommunications system was used for the applications case study. A final system configuration be used as a basis for model prediction comparison was established as a result of HYBRID2 parametric evaluation. Both codes yielded similar performance results, and this work points out that the predicted performance discrepancies are due basically to different subcomponent models and differences in control strategy. The generalized nature of this work is intended to be of interest to engineers involved with the design and analysis of hybrid power systems.