Georgios Adamidis

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Keywords: Three-level inverter p–q Theory Fuzzy logic controller Neutral point balancing Reactive power compensation a b s t r a c t In this paper the control scheme of a three-level three-phase inverter for grid integration of distributed generation (DG) units is investigated. Furthermore, the inverter compensates the reactive power of the load. The(More)
The objective of the present study was to investigate the possible electrophysiological time-related changes in auditory pathway during mobile phone electromagnetic field exposure. Thirty healthy rabbits were enrolled in an experimental study of exposure to GSM-900 radiation for 60 min and auditory brainstem responses (ABRs) were recorded at regular(More)
This paper presents a method of controlling the Torque of an asynchronous motor that is fed by a PWM-Inverter. The control method that is used is a modified direct torque control (DTC) scheme with constant switching frequency, using space vector modulation (SVM). In this scheme a closed loop of torque control is applied. Small and rapid changes on motor's(More)
The wide spread of mobile communication since the late 1980 s raises questions about the effects of electromagnetic fields (EMFs) on the human body. Most studies have focused on the non-thermal effects of electromagnetic radiation (EMR). Low-energy EMFs seem to cause structural and functional changes in the cell membrane of different cell types, leading to(More)
This paper presents a Maximum Power Point Tracking (MPPT) method which is applied on a Wind Turbine with Permanent Magnet Synchronous Generator (PMSG). A three-phase Switched Mode Rectifier (SMR) is connected with the three phase output of the PMSG. The SMR employs a modulation strategy which is based on the Space Vector Modulation (SVM) technique. Thus,(More)
This research addresses the issue of power electronics control scheme for grid integration of a distribution generation unit. For the improvement of the current control and DC bus voltage control, the application of the PI and Fizzy-PI controller is investigated. Theoretical and mathematical analysis of the internal structure of the PI and Fuzzy-PI(More)
This paper investigates the control scheme of a multilevel cascade single phase converter -consisted of two cell cascaded full-bridge converters-, where the modified p-q theory with ramp comparison has been applied for the proper single-phase interconnection of a 5 kW photovoltaic park with the grid. With the proposed method the converter is able to(More)
In this paper two different conversion systems of wind energy into electricity are investigated. In the first system studied the wind turbine is connected to a three phase diode rectifier. At the output of the non-controlled rectifier a DC/DC boost converter is connected. Controlling the switching pattern for the DC/DC converter the maximum power point(More)