Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM
The work presented in this paper deals with a proposal of a new topology of a multilevel inverter to act as a Static synchronous Compensator (STATCOM). The proposed inverter is the five-level Asymmetric Stacked Multi-Level Inverter (ASMLI). One of the essential features of this inverter that distin...
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middle technical university
2021-06-01
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| author | Mostafa Q. Kasim Raaed Faleh Hassan |
| author_facet | Mostafa Q. Kasim Raaed Faleh Hassan |
| author_sort | Mostafa Q. Kasim |
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The work presented in this paper deals with a proposal of a new topology of a multilevel inverter to act as a Static synchronous Compensator (STATCOM). The proposed inverter is the five-level Asymmetric Stacked Multi-Level Inverter (ASMLI). One of the essential features of this inverter that distinguishes it from the conventional types is that it achieves the required voltage levels with fewer switching devices, leading to simplifying the control process. Moreover, the work includes using a Finite Control Set Model Predictive Current Control (FCS-MPCC) to control the proposed structure. The FCS-MPCC control strategy performs the finite optimization process at the current sampling instant to provide the optimum switching states to the inverter at the next sampling instant. Therefore, this control strategy allows injecting harmonic current and reactive power compensation to reduce source current distortion and improve the voltage profile and power factor. The optimization mechanism reduces the cost function, which is a function of measuring the network current's deviation from the reference value and how the capacitor voltage deviates from the required values. LCL-filter was used to connect this setup to the grid, and its resonance was actively damped using the multivariable capabilities of the FCS-MPCC. The proposed control framework was simulated using MATLAB/Simulink 9.1 environment and tested in a distorted and healthy network compared to a conventional two-level converter with RL-filter. The STATCOM was used to inject reactive power to raise the source power factor to unity and reduce source current harmonics by injecting harmonic current. The proposed prototype could absorb 70% of source current harmonics, which is nearly 25% better than a conventional inverter, inject an appropriate amount of reactive power, and raise the source power factor to unity in two case scenarios. The performance achieved was promising at steady-state operation and speedy response during transients with balanced capacitors voltages.
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| format | Article |
| id | doaj-art-e75c33ae43484cf48e8acb0a5b82b44b |
| institution | Kabale University |
| issn | 1818-653X 2708-8383 |
| language | English |
| publishDate | 2021-06-01 |
| publisher | middle technical university |
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| series | Journal of Techniques |
| spelling | doaj-art-e75c33ae43484cf48e8acb0a5b82b44b2025-01-19T11:09:02Zengmiddle technical universityJournal of Techniques1818-653X2708-83832021-06-013210.51173/jt.v3i2.305Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOMMostafa Q. Kasim0Raaed Faleh Hassan1Electrical Engineering Technical College, Middle Technical University, IraqElectrical Engineering Technical College, Middle Technical University The work presented in this paper deals with a proposal of a new topology of a multilevel inverter to act as a Static synchronous Compensator (STATCOM). The proposed inverter is the five-level Asymmetric Stacked Multi-Level Inverter (ASMLI). One of the essential features of this inverter that distinguishes it from the conventional types is that it achieves the required voltage levels with fewer switching devices, leading to simplifying the control process. Moreover, the work includes using a Finite Control Set Model Predictive Current Control (FCS-MPCC) to control the proposed structure. The FCS-MPCC control strategy performs the finite optimization process at the current sampling instant to provide the optimum switching states to the inverter at the next sampling instant. Therefore, this control strategy allows injecting harmonic current and reactive power compensation to reduce source current distortion and improve the voltage profile and power factor. The optimization mechanism reduces the cost function, which is a function of measuring the network current's deviation from the reference value and how the capacitor voltage deviates from the required values. LCL-filter was used to connect this setup to the grid, and its resonance was actively damped using the multivariable capabilities of the FCS-MPCC. The proposed control framework was simulated using MATLAB/Simulink 9.1 environment and tested in a distorted and healthy network compared to a conventional two-level converter with RL-filter. The STATCOM was used to inject reactive power to raise the source power factor to unity and reduce source current harmonics by injecting harmonic current. The proposed prototype could absorb 70% of source current harmonics, which is nearly 25% better than a conventional inverter, inject an appropriate amount of reactive power, and raise the source power factor to unity in two case scenarios. The performance achieved was promising at steady-state operation and speedy response during transients with balanced capacitors voltages. https://journal.mtu.edu.iq/index.php/MTU/article/view/305Predictive controlDC‐AC power convertersPower conditioningCurrent controlReactive power controlSTATCOM |
| spellingShingle | Mostafa Q. Kasim Raaed Faleh Hassan Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM Journal of Techniques Predictive control DC‐AC power converters Power conditioning Current control Reactive power control STATCOM |
| title | Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM |
| title_full | Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM |
| title_fullStr | Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM |
| title_full_unstemmed | Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM |
| title_short | Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM |
| title_sort | model predictive current control with asymmetric stacked multilevel inverter and lcl filter based statcom |
| topic | Predictive control DC‐AC power converters Power conditioning Current control Reactive power control STATCOM |
| url | https://journal.mtu.edu.iq/index.php/MTU/article/view/305 |
| work_keys_str_mv | AT mostafaqkasim modelpredictivecurrentcontrolwithasymmetricstackedmultilevelinverterandlclfilterbasedstatcom AT raaedfalehhassan modelpredictivecurrentcontrolwithasymmetricstackedmultilevelinverterandlclfilterbasedstatcom |