Abstract
This paper presents analytical and simulation results of the application of distance relays for the protection of transmission systems employing flexible alternating current transmission controllers such as the unified power flow controller (UPFC). Firstly a detailed model of the UPFC and its control is proposed and then it is integrated into the transmission system for the purposes of accurately simulating the fault transients. An apparent impedance calculation procedure for a transmission line with UPFC based on the power frequency sequence component is then investigated. The simulation results show the impact of UPFC on the performance of a distance protection relay for different fault conditions; the studies also include the influence of the setting of UPFC control parameters and the operational mode of UPFC.
| Original language | English |
|---|---|
| Pages (from-to) | 1137-1147 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Power Delivery |
| Volume | 21 |
| Issue number | 3 |
| Publication status | Published - 2006 |
Keywords
- load flow control
- power transmission faults
- relay protection
- unified power flow controller
- power system protection
- power transmission protection
- apparent impedance calculation
- distance relay
- flexible AC transmission systems
- transmission line
- power transmission control
- flexible alternating current transmission (FACTS) controllers
- transmission system protection
- flexible alternating current transmission controllers
- fault transients
- UPFC
- power frequency sequence components