Proposed Hybrid Energy System Research Articles

Dynamic Behavior and Management Strategy of Hybrid Wind/Fuel Cell System

hybrid generation system is considered as a solution for the uncontrolled energy production from such dispersed sources as wind generation. In this paper, modeling and control of wind/FC system is proposed. Dynamics models for the main system components, namely, wind energy conversion system (WECS), fuel cell, electrolyses, power electronic interfacing circuits, hydrogen storage tank and ultra-capacitor are developed. Also, a variable speed wind generation maximum power point tracking (MPPT) based on Adaptative Neuro-Fuzzy Inference system (ANFIS) is presented. Based on the dynamic component model, a simulation model for the proposed hybrid energy system has been developed using Matlab/Simulink and the power flows management strategy are proposed. The result shows that this system can tolerate the rapid changes in wind speed and/or power demand. This results shows also that, the overall power management strategy is effective and the power flows among the different energy sources and the load demand is balanced successfully.

Modelling of hybrid energy system—Part III: Case study with simulation results

This paper presents the results of the application of model (developed in part I) and simulation algorithm (developed in part II) for determining the techno-economics of battery storage type hybrid energy system intended to supply the load of a rural remote area having a cluster of nine villages (grid isolated). The hour-by-hour simulation model is intended to simulate a typical one month period of system operation. For simulation purpose, hourly solar insolation data and load data have been generated and used as an input data. Demand side management (DSM) is used in this study to smooth out the daily peaks and fill valleys in the load curve to make the most efficient use of energy sources. The economic analysis has resulted in the calculation of optimized hourly, daily, and monthly system unit cost of proposed hybrid energy system. The obtained results represent also a helpful reference for energy planners in Uttarakhand state and justify the consideration of hybrid energy systems more seriously.

Control of Rubber Tyred Gantry Crane With Energy Storage Based on Supercapacitor Bank

This paper proposes a hybrid energy system, which consists of a diesel-engine generator and a supercapacitor, for improving performance of a rubber tyred gantry crane (RTGC). The supercapacitor contributes to the energy recovery associated with regenerative braking in Hoist-Down braking operation and to the rapid energy consumption related with acceleration in Hoist-Up operation of the RTGC. Hence, it does save energy which is conventionally wasted by a braking resistor. Moreover, the large engine generator is replaced by the much smaller one, because the supercapacitor reduces high power demands away from it. For the power conversion between the supercapacitor and the dc link, a three-leg bidirectional dc-dc converter, which has the same structure as the commercially available three-phase inverter, is used. Two kinds of simulations are performed to study the behaviors of the proposed system under the worst operating conditions. The performance of the proposed hybrid energy system is evaluated through several experiments with a real RTGC. The proposed system can cut down the fuel consumption by 35% and the emission of engine by more than 40%