مشخصات مقاله:
عنوان فارسی مقاله:
تعیین بار جریان RMS در خازن DC-Link مبدلهای منبع ولتاژ با استفاده از کنترل جریان مستقیم
عنوان انگلیسی مقاله:
Determination of RMS Current Load on the DC-link Capacitor of Voltage Source Converters using Direct Current Control
سال انتشار مقاله:
2021
مناسب برای رشته های دانشگاهی زیر:
مهندسی برق
مناسب برای گرایش های دانشگاهی زیر:
مهندسی الکترونیک، سیستم های قدرت، مدارهای مجتمع الکترونیک
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Introduction
Direct Current Control
Calculation of RMS Current Load on the DC-Link Capacitor
Verification of the Results Using Digital Simulation
Experimental Results
Accuracy in Comparison to State-of-the-Art Methods
Conclusion and Future Work
قسمتی از مقاله انگلیسی:
Abstract
RMS current load is one of the most important design criteria for the DC-link capacitors of voltage source converters. In literature, determination of this RMS current load is well documented for state-of-the-art modulation schemes like space vector modulation. But the methods presented can not be applied for direct current control algorithms. Therefore, the paper introduces a new approach specially for direct current controllers which reflects and compares to the state-of-the-art calculation method for space vector modulation. As direct current control is a feedback control, no closed-form solution can be given. Instead, the DC-link capacitor RMS current load is determined by an iterative calculation scheme as a function of the modulation level and the phase angle. Although the scheme presented is applied to a three phase two level voltage source converter it can be adapted to any voltage source converter topology. An example is presented applying the calculation method to one specific direct current control algorithm. The calculated results are verified via a digital simulation model as well as test bench measurements showing good correlation. For correct comparison, different effects are considered and discussed between simulation, calculation and measurement results. These contain transients, the commutation process between IGBT and Diode, the current dependent voltage drop of the semiconductors and the stationary current error of the hysteresis control. The DC-link capacitor current load for space vector modulation is calculated analytically as a reference by using the state-of-the-art method. The comparison of results obtained in this paper and the reference are very similar which is discussed in the conclusion.