Hybrid Electric Power Generation System Research Articles

High gain super lift Luo converter for hybrid energy management systems

Recently, there has been a resurgence of interest in the development of alternative energy supplies due to rising fossil fuel prices and issues about the effects of greenhouse gas emissions on the environment. Today's demand is the design of a hybrid electric power generation system that uses solar and wind energy for remote places. This paper presents the design of an optimized hybrid renewable energy system consisting of a photo voltaic wind turbine (savinous type) with a battery and a super lift LUO converter. A solar PV module with an intelligent inverter facilitates the tracking of the maximum power point and the implementation of a battery charge controller for greater battery lifespan as well as reliable performance. Higher power output and clean energy are available from the hybrid power generation system, which combines innovative techniques with solar and wind power.

Efficient harvesting of low-grade waste heat from proton exchange membrane fuel cells via thermoradiative power devices

A hybrid electric power generation system involving a thermoradiative power device (TPD) and a proton exchange membrane fuel cell (PEMFC) is proposed, in which the TPD can efficiently convert low-grade waste heat produced by PEMFC into electricity. Accordingly, a theoretical model is developed to investigate the output performance characteristics and the optimal design of the proposed system. The model predicts that the hybrid system can generate a maximum power density of 0.367 W/cm2 when operated at 353.15 K, possessing better output performance than other previously proposed PEMFC-based hybrid systems. The peak power density of the hybrid PEMFC-TPD device is around 1.30 times that of the PEMFC, suggesting significantly improved overall performance of the system. Additionally, the effects of radiative extraction efficiency and bandgap for the TPD to achieve optimal performance are investigated. Importantly, the optimal operating regime and the critical parameter designs concerning the hybrid system are identified, offering theoretical guidance for improving system performance. These findings provide important guidelines in designing high-performance coupled heat-to-electricity energy harvesting systems.

An Induction Generator based AC/DC Hybrid Electric Power Generation System for Additional Electrically Powered Airliner

For an additional aircraft power system, both AC and DC power having high voltage levels are required. with various flight loads. This paper introduces an induction generator based on AC / DC hybrid MEA power generation system. In the proposed system structure, a high-speed generator/generator and a low-speed generator are fitted with high pressure (HP) and low pressure (LP) of the spools of the engine, respectively. In production mode, all alternating AC power is generated by the HP generator while the DC power supply is supplied by both HP and LP generators. The control system is designed to control the AC power supply and direct the DC power supply between the two generators. The proposed AC / DC-based induction generator system results in reduced demand for computer hardware compared to the AC and DC production systems.

PID Control System Applied to a Hybrid Electric Power Generation System with Hydrogen

In this study, the capacity of two PID controllers (classic and adaptive) is evaluated to maintain the electric power of a Hybrid Electric Power Generation System (HEPGS), which is formed by a wind turbine, a photovoltaic module and a fuel cell. The addition of the fuel cell allows providing mainly the missing energy when fluctuations occur in environmental conditions that significantly reduce wind and/or solar energy. The HEPGS system installed in the Colombian Caribbean region demonstrates that 36 W and 72 W power generation is possible through the photovoltaic module and the wind turbine. Through simulations and analyses carried out in SIMULINKTM, it has been found out that the adaptive PID controller shows a better reduction in the disturbance of the electrical parameters of the HEPGS compared to the classic control. This is reflected in the lower deviation of the voltage and current obtained in the HEPGS when the adaptive control is used. The performance analysis of this type of controller allows stabilizing the HEPGS output configuration for domain variations of up to 25%. This guarantees the use of hybrid energy systems to supply an electric power independent of environmental conditions continuously.

Fuzzy Adaptive Control Applied to a Hybrid Electric-Power Generation System (HEPGS)

Objectives: Application of a fuzzy adaptive control to a commuted Hybrid Electric Power Generation System (HEPGS) for different case studies. Methods: The system is integrated by a 400 W wind turbine, a Polymer Electrolyte Membrane Fuel Cell (PEMFC), and a solar photovoltaic panel which represent the three sources of energy of the system, where the oxygen and hydrogen flow are controlled variables, and the wind power, solar power and electrical demand are uncontrolled variables considering two meteorological station, Puerto Bolivar and Ernesto Cortissoz. Findings: The transient responses of the system with respect to the variation of the solar radiation and wind velocity, regarding to the meteorological and geographical conditions of the zone, are presented as results of the manipulation of the reactant flow in the PEMFC. It was possible to propose an adaptive fuzzy PID which responses were compared to the standard responses of achieved by a classical PID controller, the responses of the fuzzy adaptive PID were 37,4 and 45,4% improved for the meteorological stations Puerto Bolivar and Ernesto Cortissoz respectively for an electrical demand of 200 MW. Finally, a fuzzy logic control model was proposed and tested, demonstrating an improved performance than a classical PID. Application: These systems are able to be applied in rural zones where the on grid energy systems are not supplied. In addition, a hybrid energy system may be improved through the implementation of novel control techniques, so that can be possible to increase the efficiency and improve the performance of the HEPGS. Keywords: Adaptive Fuzzy PID, Fuel Cells, Hybrid Energy System, Solar Energy, Wind Energy

Optimum design of a hybrid diesel-ORC / photovoltaic system using PSO: Case study for the city of Cujubim, Brazil

Abstract In this work, the optimal design of a hybrid electric power generation system for isolated zones, using Particle Swarm Optimization (PSO) technique, is presented. A study is carried out taking as case of study, the city of Cujubim, in the state of Rondonia-Brazil, consisting of photovoltaic panels, a diesel generator, batteries and an organic Rankine Cycle, which is used for the heat recovery of the exhaust gases from the diesel generator sets, what is the novelty of this study. Decision variables, involved in the optimal design problem of the hybrid system, are the number of photovoltaic panels, the number of batteries and the nominal power of the diesel generator. Directly connected to the size of the diesel generator, is the nominal power of ORC system, not being a decision variable. All components are modeled and the objective function is the cost of power generation, with system reliability, results of the simulation show that the hybrid system is profitable to supply electric power demand of a selected city.

An Induction Generator-Based AC/DC Hybrid Electric Power Generation System for More Electric Aircraft

In more electric aircraft (MEA) system, both ac and dc electric power with multiple voltage levels are required for various aircraft loads. This paper presents an induction generator-based ac/dc hybrid electric power generation system for MEA. In the proposed system architecure, a high-speed induction starter/generator and a low-speed induction generator are installed on the high pressure (HP) and low pressure (LP) spools of the engine, respectively. In generating mode of operation, all of the constant voltage variable frequency ac power is generated by the HP generator while the dc power demand is shared by both HP and LP generators. A control scheme is developed to regulate the ac load voltage and coordinate dc power generation between the two generators. The proposed induction generator based ac/dc hybrid generation system results in reduced hardware requirement compared with both ac and dc primary generation systems.

MODELING AND SIMULATION OF WIND-SOLAR HYBRID ENERGY SYSTEM FOR POWER SUPPLY TO FACULTY OF ENGINEERING TEACHING WORKSHOP IN UNIVERSITY OF MAIDUGURI

Modeling and simulation of a PV-Wind hybrid electric power generation system is presented in this paper. The system generates power from wind and solar energy sources and also supplies power to the Faculty of Engineering Teaching Workshop, University of Maiduguri, Nigeria. Ten years meteorological data (wind speed and solar irradiation) for Maiduguri was collected from the National Metrological Agency (NIMET) and analyzed using statistical and simulation software (HOMER). Theoretical models for predicting the electrical power generation potential of the hybrid system was developed and the wind and solar energy potentials of the desired site was investigated and analyzed. According to the results obtained through the analysis, the site has abundant solar energy and wind energy potential, about 2-5MWh/m 2 /yr of electrical power can be generated by using the hybrid system under ideal condition. The electric load of the workshop obtained from the energy audit carried out was about 370kWh/day and the scaled peak load is 140kW. The modeling, simulations and design has been carried out using the HOMER software based on the promising findings of these two renewable energy resource potentials. The software generates the simulation results which are lists of feasible power supply systems have been and arranged in ascending order according to their net present cost.

Design of a Photovoltaic-Wind Hybrid Power Generation System for Ethiopian Remote Area

This paper presents the design of a hybrid electric power generation system utilizing both wind and solar energy for supplying model community living in Ethiopian remote area. The work was begun by investigating wind and solar energy potentials of the desired site, compiling data from different sources and analyzing it using a software tool. The data regarding wind speed and solar irradiation for the site understudy are collected from the National Metrological Agency (NMA) and analyzed using the software tool HOMER. According to the results obtained through the analysis, the site has abundant solar energy potential and the wind energy potential is unquestionably high enough to be exploited for generating electric energy using wind turbines with low cut-in wind speed. The design of a standalone PV-wind hybrid power generating system has proceeded based on the promising findings of these two renewable energy resource potentials, wind and solar. Electric load for the basic needs of the community such lighting, water pumping, a radio receiver, flour mill and medical equipment for a health clinic has been suggested. The simulations and design has been carried out using the HOMER software. By running the software the simulation results which are lists of power supply systems have been generated and arranged in ascending order according to their net present cost. Sensitivity variables, such as range of wind speed, solar radiation, PV panel price and diesel price have been defined as inputs into the software and the optimization process has been carried out repeatedly for the sensitivity variables and the results have been refined accordingly.

가스터빈과 고체산화물 연료전지를 결합한 가압형 하이브리드 시스템의 설계변수 해석

Thermodynamic performance analysis has been carried out for a hybrid electric power generation system combining a gas turbine and a solid oxide fuel cell and operating at over-atmospheric pressure. Performance characteristics with respect to main design parameters such as maximum temperature and pressure ratio are examined in detail. Effects of other important design parameters are investigated including fuel cell internal parameters such as fuel utilization factor, steam/carbon ratio and current density, and system parameters such as recuperator efficiency and compressor inlet temperature.