Abstract
This paper proposes a frequency scanning-based impedance analysis for stability assessment of grid-connected inverter system, which is able to perform stability assessment without using system mathematical models and inherit the superior feature of impedance-based stability criterion with consideration of the inverter nonlinearities. Small current disturbance is injected into grid-connected inverter system in a particular frequency range, and the impedance is computed according to the harmonic-frequency response using Fourier analysis, and then the stability is predicted on the basis of the impedance stability criterion. The stability issues of grid-connected inverters with grid-current feedback and the converter-current feedback are addressed using the proposed method. The results obtained from simulation and experiments validate the effectiveness of the method. The frequency scanning-based impedance stability criterion can be easily used for stability assessment without using detailed mathematical model.
| Original language | English |
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| Title of host publication | Proceedings of the 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) |
| Number of pages | 6 |
| Publisher | IEEE Press |
| Publication date | Jun 2017 |
| Pages | 1575-1580 |
| ISBN (Print) | 978-1-5090-5157-1 |
| DOIs | |
| Publication status | Published - Jun 2017 |
| Event | 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) - Kaohsiung, Taiwan, Province of China Duration: 3 Jun 2017 → 7 Jun 2017 |
Conference
| Conference | 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) |
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| Country/Territory | Taiwan, Province of China |
| City | Kaohsiung |
| Period | 03/06/2017 → 07/06/2017 |
Keywords
- Inverters
- Impedance
- Power system stability
- Stability criteria
- Circuit stability