Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid
There is a growing focus on exploring direct current (DC) microgrids in traditional power grids. A key challenge in operating these microgrids is ensuring proper current distribution among converters. While conventional droop control has been used to address this issue, it requires compensating for...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/15/8659 |
| _version_ | 1797587066270253056 |
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| author | Olanrewaju Lasabi Andrew Swanson Leigh Jarvis Anuoluwapo Aluko Matthew Brown |
| author_facet | Olanrewaju Lasabi Andrew Swanson Leigh Jarvis Anuoluwapo Aluko Matthew Brown |
| author_sort | Olanrewaju Lasabi |
| collection | DOAJ |
| description | There is a growing focus on exploring direct current (DC) microgrids in traditional power grids. A key challenge in operating these microgrids is ensuring proper current distribution among converters. While conventional droop control has been used to address this issue, it requires compensating for voltage deviations in the DC bus. This paper introduces an innovative distributed secondary control approach that effectively addresses both voltage restoration and current sharing challenges within a standalone DC microgrid. The distributed secondary control proposed in this study is integrated into the microgrid’s cyber layer, enabling information sharing between controllers. This distributed approach ensures reliability, even in the event of partial communication connection failures. The controller employs a fuzzy logic control approach to dynamically determine the parameters of the secondary control, resulting in an enhanced control response. Additionally, the proposed approach can handle constant power and resistive loads without specific requirements. Employing the Lyapunov method, we have derived adequate stability conditions for the proposed controller. The performance of the controller has been assessed using MATLAB/Simulink<sup>®</sup> models and validated with real-time experimental testing performed with a Speedgoat<sup>TM</sup> real-time machine, considering five different test cases. The results indicated that the proposed control system is robust in achieving its control objectives within a DC microgrid, exhibiting fast response and minimal oscillations. |
| first_indexed | 2024-03-11T00:31:59Z |
| format | Article |
| id | doaj.art-141fc3048684483fa6e277f685c3bc8d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T00:31:59Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-141fc3048684483fa6e277f685c3bc8d2023-11-18T22:35:50ZengMDPI AGApplied Sciences2076-34172023-07-011315865910.3390/app13158659Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC MicrogridOlanrewaju Lasabi0Andrew Swanson1Leigh Jarvis2Anuoluwapo Aluko3Matthew Brown4Discipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South AfricaDiscipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South AfricaDiscipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South AfricaPower Research Laboratory, Department of Electrical and Software Engineering, University of Calgary, Calgary, AB T2N 1N4, CanadaDiscipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South AfricaThere is a growing focus on exploring direct current (DC) microgrids in traditional power grids. A key challenge in operating these microgrids is ensuring proper current distribution among converters. While conventional droop control has been used to address this issue, it requires compensating for voltage deviations in the DC bus. This paper introduces an innovative distributed secondary control approach that effectively addresses both voltage restoration and current sharing challenges within a standalone DC microgrid. The distributed secondary control proposed in this study is integrated into the microgrid’s cyber layer, enabling information sharing between controllers. This distributed approach ensures reliability, even in the event of partial communication connection failures. The controller employs a fuzzy logic control approach to dynamically determine the parameters of the secondary control, resulting in an enhanced control response. Additionally, the proposed approach can handle constant power and resistive loads without specific requirements. Employing the Lyapunov method, we have derived adequate stability conditions for the proposed controller. The performance of the controller has been assessed using MATLAB/Simulink<sup>®</sup> models and validated with real-time experimental testing performed with a Speedgoat<sup>TM</sup> real-time machine, considering five different test cases. The results indicated that the proposed control system is robust in achieving its control objectives within a DC microgrid, exhibiting fast response and minimal oscillations.https://www.mdpi.com/2076-3417/13/15/8659secondary controlfuzzy logic systemDC microgridvoltage regulationcurrent sharingdistributed energy resources |
| spellingShingle | Olanrewaju Lasabi Andrew Swanson Leigh Jarvis Anuoluwapo Aluko Matthew Brown Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid Applied Sciences secondary control fuzzy logic system DC microgrid voltage regulation current sharing distributed energy resources |
| title | Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid |
| title_full | Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid |
| title_fullStr | Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid |
| title_full_unstemmed | Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid |
| title_short | Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid |
| title_sort | enhanced distributed non linear voltage regulation and power apportion technique for an islanded dc microgrid |
| topic | secondary control fuzzy logic system DC microgrid voltage regulation current sharing distributed energy resources |
| url | https://www.mdpi.com/2076-3417/13/15/8659 |
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