Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids
In this paper, we propose a novel switching modulation scheme for three-phase four-leg inverters that enables the separation of the fault points occurring in AC distribution networks. The proposed method is aimed at continuously supplying normal voltage to the remaining healthy phases while applying...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2022-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9712307/ |
| _version_ | 1819277947236777984 |
|---|---|
| author | Chang-Gyun An Bong-Yeon Choi Hoon Lee Tae-Gyu Kim Kyung-Min Kang Mina Kim Yoon-Seong Lee Junsin Yi Chung-Yuen Won |
| author_facet | Chang-Gyun An Bong-Yeon Choi Hoon Lee Tae-Gyu Kim Kyung-Min Kang Mina Kim Yoon-Seong Lee Junsin Yi Chung-Yuen Won |
| author_sort | Chang-Gyun An |
| collection | DOAJ |
| description | In this paper, we propose a novel switching modulation scheme for three-phase four-leg inverters that enables the separation of the fault points occurring in AC distribution networks. The proposed method is aimed at continuously supplying normal voltage to the remaining healthy phases while applying zero voltage to any faulty phase when a single line-to-ground (SLG) fault occurs in the distribution network. This modulation scheme allows isolation without physically blocking the point of failure. This can prevent unnecessary continuous outages in the AC distribution network. To this end, we propose a novel coordinate transformation method to extract accurate values for the magnitude of unbalanced three-phase voltages. A novel space vector pulse-width modulation (SVPWM) method for switching schemes that are used under fault conditions is also presented. The proposed coordinate transformation considers a plane lying in a three-dimensional (3-D) space that describes the rotation of a three-phase voltage vector. This transformation converts a physical quantity that rotates in 3-D space into a value that moves in two-dimensional (2-D) space. Subsequently, the use of synchronous reference frame (SRF) transformation enables the detection and control of the voltage magnitude in case of an SLG fault. Additionally, switching vectors are selected to apply zero voltage to the faulty phase by analyzing the switching vector diagram of a four-leg inverter. Mathematical analyses conducted for the entire process are detailed herein. Further, the experimental results of four-leg inverters designed for the 10 kW class verify the proposed strategies. |
| first_indexed | 2024-12-24T00:04:12Z |
| format | Article |
| id | doaj.art-fd377d067da94e79b2270c2e31c522de |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-24T00:04:12Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-fd377d067da94e79b2270c2e31c522de2022-12-21T17:25:04ZengIEEEIEEE Access2169-35362022-01-0110185571856910.1109/ACCESS.2022.31510669712307Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded MicrogridsChang-Gyun An0https://orcid.org/0000-0002-9180-1799Bong-Yeon Choi1Hoon Lee2https://orcid.org/0000-0002-2317-3209Tae-Gyu Kim3https://orcid.org/0000-0003-1260-9369Kyung-Min Kang4Mina Kim5Yoon-Seong Lee6https://orcid.org/0000-0002-4625-3404Junsin Yi7https://orcid.org/0000-0002-6196-0035Chung-Yuen Won8https://orcid.org/0000-0002-1809-3052Department of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaMando Corporation, Seongnam, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Engineering, Sungkyunkwan University, Suwon, South KoreaIn this paper, we propose a novel switching modulation scheme for three-phase four-leg inverters that enables the separation of the fault points occurring in AC distribution networks. The proposed method is aimed at continuously supplying normal voltage to the remaining healthy phases while applying zero voltage to any faulty phase when a single line-to-ground (SLG) fault occurs in the distribution network. This modulation scheme allows isolation without physically blocking the point of failure. This can prevent unnecessary continuous outages in the AC distribution network. To this end, we propose a novel coordinate transformation method to extract accurate values for the magnitude of unbalanced three-phase voltages. A novel space vector pulse-width modulation (SVPWM) method for switching schemes that are used under fault conditions is also presented. The proposed coordinate transformation considers a plane lying in a three-dimensional (3-D) space that describes the rotation of a three-phase voltage vector. This transformation converts a physical quantity that rotates in 3-D space into a value that moves in two-dimensional (2-D) space. Subsequently, the use of synchronous reference frame (SRF) transformation enables the detection and control of the voltage magnitude in case of an SLG fault. Additionally, switching vectors are selected to apply zero voltage to the faulty phase by analyzing the switching vector diagram of a four-leg inverter. Mathematical analyses conducted for the entire process are detailed herein. Further, the experimental results of four-leg inverters designed for the 10 kW class verify the proposed strategies.https://ieeexplore.ieee.org/document/9712307/Single line-to-ground (SLG)four-leg invertersthree-dimensional (3-D)space vector pulse-width modulation (SVPWM)coordinate transformationmicrogrid |
| spellingShingle | Chang-Gyun An Bong-Yeon Choi Hoon Lee Tae-Gyu Kim Kyung-Min Kang Mina Kim Yoon-Seong Lee Junsin Yi Chung-Yuen Won Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids IEEE Access Single line-to-ground (SLG) four-leg inverters three-dimensional (3-D) space vector pulse-width modulation (SVPWM) coordinate transformation microgrid |
| title | Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids |
| title_full | Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids |
| title_fullStr | Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids |
| title_full_unstemmed | Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids |
| title_short | Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids |
| title_sort | space vector pulse width modulation control strategy for four leg inverters under single line to ground faults in islanded microgrids |
| topic | Single line-to-ground (SLG) four-leg inverters three-dimensional (3-D) space vector pulse-width modulation (SVPWM) coordinate transformation microgrid |
| url | https://ieeexplore.ieee.org/document/9712307/ |
| work_keys_str_mv | AT changgyunan spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT bongyeonchoi spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT hoonlee spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT taegyukim spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT kyungminkang spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT minakim spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT yoonseonglee spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT junsinyi spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids AT chungyuenwon spacevectorpulsewidthmodulationcontrolstrategyforfourleginvertersundersinglelinetogroundfaultsinislandedmicrogrids |