COORDINATION PROTECTION SYSTEM DESIGN FOR INVERTER-BASED MICROGRIDS
In the inverter-based microgrid system, there is a problem with the small magnitude of short-circuit current contributed by the inverter. This happens because the components of the inverter, namely switches, which are usually IGBTs or MOSFETs, have a certain current limit that must not be exceede...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/65810 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | In the inverter-based microgrid system, there is a problem with the small magnitude of
short-circuit current contributed by the inverter. This happens because the components of
the inverter, namely switches, which are usually IGBTs or MOSFETs, have a certain current
limit that must not be exceeded to ensure the components are not being damaged. The
fault current contributed by this inverter might be smaller than the conventional
overcurrent relay pickup current which results in no fault being detected. An alternative
solution to overcome this problem is to use a 51V relay which has a lower pickup current
when detect a voltage drop. In this case, the writer designing and evaluating overcurrent
protection, protection coordination, and the effect of using NGR in inverter-based
microgrid systems. Tests were carried out using DIgSILENT Power Factory for several
generation scenarios, fault impedance, and fault types. In conclusion the 51V relay is able
to overcome the insensitivity of conventional overcurrent relays, the coordination between
relays that had been carried out was good, and it is better not to use NGR in an inverterbased microgrid system. |
|---|