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| Content Provider | IET Digital Library |
|---|---|
| Author | Ke, Jia Zhengxuan, Zhu Qijuan, Zhao Zhe, Yang Tianshu, Bi |
| Abstract | DC Grid does not transmit reactive power, nor does it offer frequency and phase issues. This results in malfunction of conventional islanding detection methods (IDMs) that rely on the above quantities. At present, the DC IDMs proposed in literatures are mostly active power injection methods based on DC/DC converters. However, in a multi-photovoltaic (PV) DC system, the synchronization of the injection of converters is difficult to guarantee, which may lead to detection failure. This paper proposes an impedance measurement IDM for multi-PV DC micro grid based on the analysis of high-frequency impedance model of power electronic devices. The impedance of DC converters is constant at high frequency and the harmonic impedance of the system changes significantly after islanding, so that islanding operation can be accurately detected. The harmonic impedance change directly reflects the structural changes of the system, and its calculation requires less disturbance intensity, which avoids the requirement of synchronous injection. Therefore, the method uses a DC/DC converter for injection, without the need for additional injection equipment. The method has little influence on power quality and theoretically has no none detection zone. Simulation results show that the method can perform accurately islanding detection in multi-PV DC micro grid. |
| Starting Page | 2604 |
| Ending Page | 2611 |
| Page Count | 8 |
| ISSN | 17521416 |
| Volume Number | 13 |
| e-ISSN | 17521424 |
| Issue Number | Issue 14, Oct (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/13/14 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0271 |
| Journal | IET Renewable Power Generation |
| Publisher Date | 2019-07-26 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Active Power Injection Method DC Network DC System DC-DC Converter DC-DC Power Converter Detection Failure Distributed Power Generation Disturbance Intensity Electric Impedance Measurement Electrical Quantities Failure Analysis Harmonic Impedance Measurement Harmonic Injection Harmonics High-frequency Impedance Model Impedance And Admittance Measurement Impedance Measurement IDM Injection Signal Synchronization Islanding Detection Method Islanding Operation State Multiple Photovoltaic Source Multiport Photovoltaic DC Microgrid MultiPV DC Microgrid Photovoltaic Power System Power Electronic Device Power Generation Reliability Power Grid Power Quality Power Supply Quality Power System Harmonics Power System Measurement Power System Measurement And Metering PV Source Reactive Power Reliability Solar Power Stations Synchronisation Transmit Reactive Power |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment |
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