Abstract
A synchronous generator-based distributed energy resource (DER) is commonly employed in microgrids due to its low cost and simple controls. However, there are many challenges to the DER operation when it is sized for supplying the critical loads alone in a microgrid. In particular, the DER would experience an overload condition during the microgrid transition from grid-connection to islanded operation, when the noncritical loads are also supplied momentarily. Therefore, it is very important to have a clear understanding on the survivability of a synchronous generator-based DER for transient overload conditions. Recently, experimental tests on survivability of the DER were carried out in the Consortium for Electric Reliability Technology Solutions Microgrid Testbed at American Electric Power. In this paper, an in-depth analysis of the synchronous generator-based DER operation during transient overload conditions is presented. The key relationships governing the system dynamic behavior of synchronous generator-based DER are analyzed to design the load shedding scheme for its survivability. Several case studies are illustrated to demonstrate the validity of the proposed load shedding method.
| Original language | English |
|---|---|
| Article number | 8408714 |
| Pages (from-to) | 5717-5726 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 54 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 1 2018 |
| Externally published | Yes |
Funding
Manuscript received March 1, 2018; revised May 15, 2018 and June 8, 2018; accepted June 8, 2018. Date of publication July 8, 2018; date of current version October 12, 2018. Paper 2018-PSPC-0029.R2, presented at the 2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference, Niagara Falls, ON, Canada, May 7–10, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Power Systems Protection Committee of the IEEE Industry Applications Society. This work was supported in part by the Office of Naval Research under Award N00014-16-1-2753 and in part by the Office of Electricity Delivery and Energy Reliability, Transmission Reliability Program of the U.S. Department of Energy under subcontract 7004227 with The Ohio State University administered by the Lawrence Berkeley National Laboratory. (Corresponding author: Jongchan Choi.) J. Choi, M. S. Illindala, and K. Subramaniam are with The Ohio State University, Columbus, OH 43210 USA (e-mail:, [email protected]; [email protected]; [email protected]).
Keywords
- Distributed power generation
- islanding
- load shedding
- microgrids
- overload conditions
- power system protection
- survivability
- synchronous generators