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This paper presents a method for the possible detection of abnormal performance of a wind turbine based on real observed pairs of wind speed and generated power. Usually the power curve satisfies this objective but its use in real-time for the detection of abnormal performance is not easy because the pairs observed do not follow a single line, but rather cloud of points around an ideal definition...
This paper describes the frequency analysis method of the conducted noise in AC/DC converter using SiC-MOSFET on the basis of the leakage current by switching. The error of the experimental and simulation result of the disturbance voltage is 10 dBμV. The simulation result can be closely simulated including resonance points. Furthermore, this paper presented verification results of designed EMI filters...
As renewable energy sources are used increasingly; distributed generation (DG) became a new trend in energy market. Turkey, in which unlicensed DG inclines rapidly, has a special case about deployment of distributed pv power plants. Unlicensed PV power plants have higher capacity and less in number than expected values. Therefore, this undesired case has different effects on distribution system from...
The reduction in weight of an electric vehicle (EV) is essential for the improvement of driving performance and reducing cost. In particularly, lightening the weight of motor shaft used for EV contributes to not only total weight reduction but also decrease in shaft inertia, which determines responsiveness of the induction motors. The motor shaft has complicated figures at both shaft ends in order...
Direct matrix converters (DMC) allow desired AC power flow from supply to load. Desired AC power means voltage and current having required magnitude and frequency. DMC is a type of AC-to-AC power converter having relatively small dimensions of circuits which provide substantial advantages to them. In this study, the new swarm intelligence (SI) based control method is suggested to control 3-phase DMC...
Impedance analyzers are often used for characterization of many electrochemical devices, such as photovoltaic cells, fuel cells and batteries, that are commonly utilized in renewable energy applications. Depending upon specifications of these devices, they are quite expenseive and their use in many low-cost applications is limited. This study demonstrates a practical impedance analyzer application...
This paper presents two different control strategies to balance the capacitor voltage of sub-modules in modular multilevel converters. In the centralized control, sub-modules receive the switching state defined by a proposed sorting algorithm in order to control the capacitor voltage. The proposed algorithm reduces the number of switching changes in comparison with the classical sorting algorithm...
The output power of PV system can drastically decrease when photovoltaic modules under partially shaded condition. Therefore, partially shaded condition is a big issue to proper tracking maximum power point in photovoltaic systems. This paper proposes a new simple method which can track the global maximum power point under this condition. The proposed method is obtained by combining the incremental...
The purpose of this paper is to present a new approach of optimum energy scheduling using linear programing for an emergency isolated power generator installed in a large hospital. In our previous work, we have developed a simulator to analyze the power grid conditions when a power failure occurred in medical facilities. Analyzing the power supply and demand balance in medical facilities with our...
This paper proposes a linearized model of Modular Multilevel Converter (MMC) in DQ frame. The proposed MMC model has a modular structure and can be linked with other power elements such as AC and DC subsystems. The main challenge of developing DQ model of MMC is to deal with the multiplication terms in dynamic equations of MMC. In this paper, the multiplication terms are done in ABC frame and results...
Reference current play a decisive role in power quality control algorithm. In this paper, introduce the principle of six reference current extracting methods in time domain, and applying MATLAB/Simulink software to simulate in eight conditions. The results shown that p-q theory method have a high power factor(PF) three-phase balance and harmonic suppression; Fryze-Buchholz-Depenbrock(FBD) method have...
In this study, a series resonant converter is designed in order to improve power generation capability of surface mounted permanent magnet generator over a wide speed range while considering the current limits of the machine. A simple and mostly accurate design approach for the series resonant converter has been developed by considering the dynamic characteristics of the surface mounted permanent...
Renewable energy sources have long since been recognized as environmental-friendly, sustainable and climate-neutral solution for future power systems. With the increasing penetration of renewable energy sources, particularly wind energy, as well as the growing percentage of power electronics-based devices and plants in the electrical supply grid, power quality issues ranging from voltage sags/swells,...
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
This work describes a general concept for modeling weather phenomena as renewable energy resources. The model considers all typical effects, like time-variance, realistic rates of change, the causality relation between different weather phenomena and satisfying the reference distribution functions. The focus of this work is to design a continuous model, similar to a weather generator, with a simple...
This paper clarifies the relationship between voltage gain tolerance and resonant circuit components variation for mass production of LLC converters. The LLC converter is a good solution for high power application, hence many PV systems which use LLC converter have been proposed. The combination of the LLC converter and a multi-level conversion technique is also proposed to overcome a drawback of...
In this paper, we present the class E amplifier connecting the transistors in series, and some of connected transistors in series are constantly kept active, and rests are periodically controlled. In the proposed method, peak switch voltage of class E amplifier is reduced lower than conventional because shunt capacitance voltage is divided by connecting the transistors in series. Thus, peak switch...
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