Abstract
New and stronger power quality requirements are issued due to the increase amount of photo-voltaic (PV) installations. In this paper different methods are used for continuous grid monitoring. By injecting a non-characteristic harmonic current and measuring the grid voltage response it is possible to evaluate the grid impedance directly by the PV-inverter, providing a fast and low cost implementation. This principle theoretically provides a correct result of the grid impedance but when using it into the context of PV integration, different implementation issues strongly affect the quality of the results. This paper presents a new impedance estimation method including typical implementation problems encountered and it also presents adopted solutions for on-line grid impedance measurement. Practical tests on an existing PV-inverter validate the chosen solutions.
| Original language | English |
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| Title of host publication | Proceedings of PESC 2004 |
| Volume | 4 |
| Publisher | IEEE Signal Processing Society |
| Publication date | 2004 |
| Pages | 3095-3101 |
| ISBN (Print) | 0-7803-8399-0 |
| DOIs | |
| Publication status | Published - 2004 |
| Event | 2004 IEEE 35th Annual Power Electronics Specialists Conference, 2004. PESC 04. - Aachen, Germany Duration: 20 Jun 2004 → 25 Jun 2004 Conference number: 35 |
Conference
| Conference | 2004 IEEE 35th Annual Power Electronics Specialists Conference, 2004. PESC 04. |
|---|---|
| Number | 35 |
| Country/Territory | Germany |
| City | Aachen |
| Period | 20/06/2004 → 25/06/2004 |