محمودیان, مهرداد
دانشگاه صنعتی شیراز
[ 1 ] - ارائه یک اینورتر تکفاز فتوولتاییک جدید با بازدهی بسیار بالا به منظور حذف جریان نشتی حالت مشترک در کاربردهای ریزشبکه
This paper is proposed a novel topology of a single phase grid connected inverter in order to conquest the common mode leakage current. There are many topologies presented so far, But none of them has the efficiency more than 98 percent. In this paper, a modern configuration is presented that, not only delete the common mode leakage current, but also increase the efficiency and power density an...
[ 2 ] - ارائۀ یک روش نوین به‌منظور مدل‌سازی جامع سیستم زمین دکل‌های فشار قوی و برج توربین‌های بادی با استفاده از روش برازش برداری
In the past, grounding systems usually were modeled by an individual Resistor. This estimation is useful only at low frequencies, while in high frequencies, the inductance of the grounding system plays the main role to identify the phase and amplitude of that. In recent years, as wind farms grow rapidly throughout the world, the grounding system and ground impedance of wind turbine towers under...
[ 3 ] - مدل‌سازی شبکه‌های چندترمیناله در سیستم‌های قدرت با استفاده از روش برازش برداری به‌منظور تحلیل حالات گذرای الکترومغناطیسی فرکانس بالا
Modeling of frequency-dependent components of power system is often based on a terminal description by an admittance matrix in the frequency domain. One challenge in the extraction of state-space models from such data is to prevent possible error magnification when the model is to be applied in time-domain simulations. The error magnification is a consequence of inaccurate representation of sma...
[ 4 ] - A New Approach for Reactive Power Control of Single Phase Transformerless Inverter to Modify Power Quality in Stand Alone Micro-Grids with Current Leakage Elimination
Nowadays there has been an increasing interest in transformerless inverter for grid-connected photovoltaic (PV) system due to low cost, high efficiency and light weight. One of the reasons describe the grid behavior is capability of reactive power control by inverter. According to the standard VDE-AR-N 4105, grid-tied PV inverter of power rating below 3.68KVA, should attain power factor (PF) fr...
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