Modeling and Capacitors Voltage Balancing Control of STATCOM Based on Modular Multilevel Converter
Publish place: The first international conference of modern research engineers in electricity and computer
Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CBCONF01_0559
تاریخ نمایه سازی: 16 شهریور 1395
Abstract:
Modular multilevel converter (MMC) provides a new concept in a wide range of applications due to its simple topology and high reliability. In this paper, a three phase four legs modular multilevel converter is used as a compensator in a four-wire network which feeds an unbalanced and distorted custom load. The purpose is to compensate this unbalance load currents by injection suitable currents besides the capacitors voltage balancing control in individual legs. In this paper, designing of compensator current controller will be done based on a composite control model (CCM) combined of average model and predictive control method. Also an independent controller has been proposed for capacitors voltage balancing whose task is to eliminate the circulating current oscillations in each leg. In order to control total energy stored in converter and also to remove the zero sequence current, two simple control schemes have been presented based on PI controller and closed loop controller, respectively. Finally simulation results have been presented in MATLAB/Simulink to confirm effectiveness and accuracy of proposed controller.
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Authors
Milad Samady Shadlu
Department of Electrical and Electronic Engineering Young Researchers and Elite Club, Bojnourd Branch, slamic Azad University Bojnourd, Iran
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