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Solar power plants should collect any available thermal energy in a usable form at the desired temperature range. Efficient operation requires a fast start-up and reliable operation in varying cloudy conditions without unnecessary shutdowns and start-ups. Fast and well damped linguistic equation (LE) controllers have been tested in Spain at a collector field, which uses parabolic-trough collectors...
In recent years, an interest toward fuel cell studies has grown because of increasing energy demand and fuel cells are clean and efficient sources of electricity. In this study, the electrical characteristic of solid oxide fuel cell (SOFC) is analysed. The dynamic model of solid oxide fuel cell is built using PSCAD software. DC performance of SOFC is tested under constant load. Then variable DC load...
The necessitation in the optimal power demand model, make it an impetus to present this work as a glaring path in determining the optimum power demand curve, using the available data of a substation. The data are used to find the equation and its coefficients of determination that can give the best-fit curve of the power demand of a substation, based on the available data. This will produce a model...
The paper is to study new control strategies for improvement of dynamic responses of a supercritical power generation process through an improved control to the associated fuel preparation performed by the coal milling process. Any control actions taking for the milling process will take a long time to show their influences onto the boiler, turbine and generator responses as the whole process experiences...
This paper presents a simulation model of green energy devices, which is developed for analyzing energy balance of a micro-grid and for optimizing its management. Several renewable energy based electricity production and storage are modeled and analyzed in the making of strategies for sustainable micro-grid management. In this study, two different simulation models are described, which call a “long-term...
Two-axis pan and tilt systems are widely used in surveillance applications for high accuracy positioning of sensor payloads such as cameras and laser pointers. In order to develop advanced control algorithms to improve the performance of these systems, a model of the system must be developed. This model should include the dynamics of the system to include effects such as compliance and account for...
Accurate load forecasting is essential for energy planning and load management. This paper presents long term industrial load forecasting (LTLF) using Nonlinear Autoregressive Exogenous model (NARX) based Feed-Forward Neural Network (FFNN) method, Support Vector Regression (SVR) and Neural Network models. It is applied to data sets obtained from National Transmission and Dispatch Company (NTDC) of...
HF-link converters have been studied for several years but they have not been exploited as widely as DC bus based topologies. HF-Link Cycloconverter based topology offers a way to reduce power processing stages redundancy present in conventional DC-bus isolated inverters. However, Cycloconverters have been limited to medium - high power applications because of the complexity associated with their...
This paper deals with the use of computer simulation with the aim of design efficient production in manufacturing and production systems. In our case, the possibilities of such use are demonstrated on particular example from industrial practice. The purpose was to build up a model of the prepared manufacture system and, especially, to propose a solution designed to increase productivity and to find...
In this paper the Bond Graph (BG) technique is used for modelling power split and power flow of planetary gears with three connections for Hybrid Electric Vehicles (HEV). Some basic equations for one gear type and a comparison of parameters and steady-state equations for two gear types are firstly given. A unified model based on a fourth virtual connection for the load is presented, preparing in advance...
In recent years the simulation tools have been optimized for precise modelling and simulation for their special purpose. Therefore the simulation tools have been developed to model and simulate a certain problem. In the past, the hardware was used to be modeled in a SPICE simulator, the software in a signal and differential equation based simulator. Nowadays the investigated systems are decreasingly...
This paper covers the modelling of the standard IEEE 14 bus system using the MATLAB package. The basic system is tested under large and small disturbances to study the dynamic behaviour of the system and the stability margins associated with the different configurations of the system. As a suggested solution to increase stability margins of the system, Sen transformer is added, modelled and tested...
Power system simulation software is a useful tool for teaching the fundamentals of power system design and operation. However, existing commercial packages are not ideal for teaching work-based students because of high-cost, complexity of the software and licensing restrictions. This paper describes a set of power systems libraries that have been developed for use with the free, student-edition of...
This paper describes small-signal analysis of a photovoltaic boost converter with an emulated load controller and a resistive load. The simulation results of the derived model are compared to time-domain large-signal simulation results for verification. This analysis helps select the time interval between iterations of Perturb and Observe algorithm. It was found that output voltage takes longer time...
Most traction substations are equipped with 12-pulse passive rectifiers. Therefore, Total Harmonic Distortion (THD) of the input current is high, and feedback of braking power into the grid is not possible. Also, the overhead line voltage fluctuates seriously with varying loads. Imtech has developed a bidirectional supply for traction substations based on IGBT technology. The power electronics consist...
This paper introduces an electro-thermal model of an inverter implemented in PLECS. This model is able to calculate IGBT junction temperature with a mission profile. Look up tables (LUT) of switching power loss are generated by running physics-based IGBT and diode models under different operating conditions. The inverter model interpolates power dissipation from the LUTs to speed up the simulation...
Laboratory set-ups for drive systems with torsional load are rather expensive and therefore rarely used in engineering education. In this paper, a versatile low-cost solution is developed, some industrially relevant examples and experiments are presented, and a day program for student exchanges with associated university colleges is discussed.
Constantly increasing complexity of organizational environments and changing demands of the stakeholders severely affects the strategic capabilities of organizations and reduces their decision making ability dramatically. Large-scale complex systems like energy grids, air-ground traffic control systems and logistics systems are designed in multi-actor environments and hence require various perspectives...
In this paper the dynamic analysis of a photovoltaic system with an emulated load control scheme is provided by means of a linearized small-signal state-space model. The model is verified by comparing the results of the time-stepped component level simulation and the simulation of the linearized state-space model. The derived model helps determine the minimal time between iterations of Perturb and...
With increasingly stringent regulations on fuel emissions, vehicle manufacturers have started developing hybrid and electric versions of their vehicles. This paper presents a systematic approach to developing series-hybrid version of an existing bus through power-train modelling. The approach involves accurate modelling of the conventional bus, validating it by matching the simulation results with...
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