Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters
In Korea, there is a rule for Renewable Energy Certification with weighting 5.0, to expand grid linkage capacity and to improve the stability of the grid to accommodate photovoltaic (PV) systems in a distributed power system. Due to this rule, many power companies and operators are trying to install...
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MDPI AG
2019-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/5/817 |
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| author | Jong Rok Lim Hye Mi Hwang Woo Gyun Shin Hyung-Jun Song Young-Chul Ju Young Seok Jung Gi Hwan Kang Suk Whan Ko |
| author_facet | Jong Rok Lim Hye Mi Hwang Woo Gyun Shin Hyung-Jun Song Young-Chul Ju Young Seok Jung Gi Hwan Kang Suk Whan Ko |
| author_sort | Jong Rok Lim |
| collection | DOAJ |
| description | In Korea, there is a rule for Renewable Energy Certification with weighting 5.0, to expand grid linkage capacity and to improve the stability of the grid to accommodate photovoltaic (PV) systems in a distributed power system. Due to this rule, many power companies and operators are trying to install electrical energy storage systems that are able to operate in conjunction with PV system power. These systems operate in parallel at the same grid connection point. This paper presents the results of case studies on the failure to detect islanding operation. Test evaluation devices that could be bi-directionally charged and discharged were implemented for an islanding detection test. Testing was conducted under a variety of operating conditions. When a single inverter was operated under the islanding condition, it was stably stopped within 0.5 s using the Korean grid-code standard. However, when two inverters were operated at the same time under the islanding condition, islanding detection failed and the two inverters continued to feed the connected RLC (resistor, inductor, capacitor) loads in the isolated section known as an island. Different algorithms used by PCS (power conversion system) manufacturers to detect islanding might cause this phenomenon. Therefore, it is necessary for a new PCS test standard to detect islanding. |
| first_indexed | 2024-04-14T02:47:22Z |
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| id | doaj.art-ceeb9291b9d94e54b4a4aa60fce42e36 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-14T02:47:22Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-ceeb9291b9d94e54b4a4aa60fce42e362022-12-22T02:16:30ZengMDPI AGApplied Sciences2076-34172019-02-019581710.3390/app9050817app9050817Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems InvertersJong Rok Lim0Hye Mi Hwang1Woo Gyun Shin2Hyung-Jun Song3Young-Chul Ju4Young Seok Jung5Gi Hwan Kang6Suk Whan Ko7Photovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaPhotovoltaics Laboratory, New and Renewable Energy Institute, Korea Institute of Energy Research, Daejeon 34129, KoreaIn Korea, there is a rule for Renewable Energy Certification with weighting 5.0, to expand grid linkage capacity and to improve the stability of the grid to accommodate photovoltaic (PV) systems in a distributed power system. Due to this rule, many power companies and operators are trying to install electrical energy storage systems that are able to operate in conjunction with PV system power. These systems operate in parallel at the same grid connection point. This paper presents the results of case studies on the failure to detect islanding operation. Test evaluation devices that could be bi-directionally charged and discharged were implemented for an islanding detection test. Testing was conducted under a variety of operating conditions. When a single inverter was operated under the islanding condition, it was stably stopped within 0.5 s using the Korean grid-code standard. However, when two inverters were operated at the same time under the islanding condition, islanding detection failed and the two inverters continued to feed the connected RLC (resistor, inductor, capacitor) loads in the isolated section known as an island. Different algorithms used by PCS (power conversion system) manufacturers to detect islanding might cause this phenomenon. Therefore, it is necessary for a new PCS test standard to detect islanding.https://www.mdpi.com/2076-3417/9/5/817anti-islandinganti-islanding detectEESS inverterPV inverterPV system |
| spellingShingle | Jong Rok Lim Hye Mi Hwang Woo Gyun Shin Hyung-Jun Song Young-Chul Ju Young Seok Jung Gi Hwan Kang Suk Whan Ko Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters Applied Sciences anti-islanding anti-islanding detect EESS inverter PV inverter PV system |
| title | Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters |
| title_full | Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters |
| title_fullStr | Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters |
| title_full_unstemmed | Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters |
| title_short | Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters |
| title_sort | case studies for non detection of islanding by grid connected in parallel photovoltaic and electrical energy storage systems inverters |
| topic | anti-islanding anti-islanding detect EESS inverter PV inverter PV system |
| url | https://www.mdpi.com/2076-3417/9/5/817 |
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