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A v-shaped interior permanent magnet (1PM) and a surface mounted permanent magnet (SMPM) machines with the same dimensions and magnet volume are used as WEC generators and are evaluated using the Life Cycle Cost (LCC) method. The most optimal design from the economical perspective is determined to be the SMPM.
Variations in sensor data collected from equipment have been widely analyzed by using anomaly detection methods for predictive maintenance. Our experience shows that correlations between sensors effectively predict failures because the correlations usually reflect the status of equipment with higher sensitivity. In this paper, we present a method that exploits correlations between sensors for pre-processing...
this paper describes and analyzes a system for controlled aging of electrical Form-Wound Bars and Coils of large rotating synchronous machines. The proposed system allows performing an improved voltage endurance test, if compared to standard procedure given by std IEEE 1043–2002: Recommended Practice for Voltage-Endurance Testing of Form-Wound Bars and Coils [1]. This work will explain the key features...
This paper presents a new graduate-level course that is designed, developed, and taught at the University of Wisconsin-Madison to further advance the education for wind power technologies. The objective of this course is to provide an in-depth coverage of control of electric drives for wind turbines with an emphasis using state-of-the-art modeling and simulation techniques. Various generator types...
Single-phase inductor alternators have been shown to be suitable for use with renewable energy electric conversion systems for small power applications. Since both the field and the ac output winding are on the stator, these alternators, in respect of construction and maintenance, have all the advantages of self-excited induction generators presently being employed with renewable energy sources. An...
In today's energy-saving and optimization programs, hydroelectric power plays a key role as it is based on a clean renewable energy source and capable of fulfilling a significant portion of the overall power demand. However, many hydropower plants have been in service for decades and are built with obsolete technology. In order to better exploit their potentialities, they often need large renewal...
The paper analyzes the phenomenon of self-excitation in induction generators. A nonlinear state-space model is obtained based on a magnetization curve that is nonlinear at high and low currents. The model was used previously to characterize the steady-state regimes of self-excited induction generators, including the number of possible regimes and their stability properties. In this paper, the model...
Pollution and limited fossil fuels are the critical issues that lead HEVs to emerge. Nowadays new designs and topologies of HEVs are suggesting and developing. In this paper we have dynamically modeled and simulated a new structure of series-parallel HEV based on a special machine named Transmotor and applied it to Toyota Prius 2004. In This structure, generator and planetary gear in common series-parallel...
This paper presents an Improved Parallel Differential Evolution (IPDE) optimization algorithm based dynamic decomposed strategy to solving large economic dispatch (ED) with consideration of practical generators constraints. The migration operation inspired from Biogeography-based Optimization algorithm (BBO) is newly introduced in the parallel DE approach, thereby can effectively explore and exploit...
The paper presents a study for determination the optimal control law for a small horizontal axis windgenerator. Experimentally, using a mixed physical-analog laboratory model, were determined the state variables, corresponding to different wind speed values, for the optimum regimes of the wind turbine, based on the turbine theoretical estimated mathematical model. From a large multitude of possible...
To broaden the output voltage adjustment range of the X-Ray high voltage dc power supply and to make control circuit simple, a high frequency high voltage X-ray power supply with full bridge LLC (FB-LLC) series resonant converter is proposed. FB-LLC series resonant, high voltage transformer and bipolar single-phase symmetrical voltage multiplier are used in the main circuit. The parameters of the...
Performance of planned shipboard distribution/generation systems can be affected by power fluctuations and inappropriate control strategies. A measure of observability of such systems will allow one to quantify their operational performance. This paper attempts to account for observability of these systems through the incorporation of nonlinear dynamics of converters and electromechanical behavior...
Piezoelectric power generators employing piezoelectric materials to scavenge ambient vibration energy and provide micro electric energy for MEMS. In this paper, a model based on current equivalent circuit method to analyze electric generation characteristics of a cantilever piezoelectric power generator from low-frequency vibrations is put forward and used to discuss a prototype with experimental...
Since giant magnetostriction was first found at aroom temperature in early 1980s, there have been many applications proposed. This paper introduces a novel application which is able to generate electric power by utilizing a reverse transduction of the material called Villari effect. The generator uses vibration as a power source which is easily accessible in our daily life such as traffic-induced...
Analyzing from the several main kinds of bidding mechanism for electricity market,the most important factor to judge the superiority and inferiority of bidding mechanism is the degree of information disturbance. From the perspective of signal transmission in game theory, this paper proposed a random matching mechanism of optimal probability to improve the fault of PAB Bidding mechanism. This mechanism...
The paper focuses on a type of generator sets, designing a generator set's monitoring detecting system, prototype circuit is designed, the serial communication between the MCU (Microcontroller Unit) and the PC (Personal Computer) is achieved, the anti jamming technology has been considered, and it uses VB (Visual Basic) to carry out the design of the background manager, the whole system is debugged.
A collaborative research and technology development effort was conduct by ARL Penn State and AMSAA to develop embedded diagnostic and predictive technology for ground platform power generators. An Army Freightliner truck was used as the test bed, and it was outfitted with seven new alternators of the same model type that each had a specific seeded fault, including a baseline non-faulted alternator...
The single machine infinite bus system excitation control of power system is discussed in this paper. A nonlinear equivalent sliding mode controller and adaptive sliding mode controller are designed based on the theory of sliding mode variable structure control and stability analysis is included. The proposed design approach enables to compensate the inherent nonlinearities of the generator and to...
With the increasing of the power from KW to MW for wind turbines, effective cooling measures are introduced for keeping the system operating within the allowable temperature. Taking a 1mw wind turbine as an example, this paper introduces the structural features and the ventilation way of it, the CFD(Computational Fluid Dynamics) software is adopted to analyze the fluid field and the temperature field...
This paper introduces a new method for mitigating inter-area oscillations of a large scale interconnected power system by means of generation re-dispatch. The optimal mitigation procedures are derived by searching for the shortest distance from current operating condition to a targeted operating condition with the desired damping ratio of the oscillation mode. A sensitivity-based method is used to...
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