| Title |
A study on IEC 61850 based Centralized 22.9kV Bus Protection considering Time Synchronization Errors |
| Authors |
송명훈(Myeong-Hoon Song ); 이남호( Nam-Ho Lee ); 남순열 ( Soon-Ryul Nam ) |
| DOI |
https://doi.org/10.5370/KIEE.2019.68.8.965 |
| Keywords |
22.9kV Bus Differential Protection; Differential Current Error; GOOSE; IEC 61850; Time Synchronization Error; Measurment Timing Error |
| Abstract |
Data exchange are important for reliable operation of IEC 61850 based protections in power systems. In this paper, we demonstrate the acquisition of phasor data using GOOSE and SV and bus differential backup protection based on IEC 61850. Particularly, in IEC 61850 based 22.9kV bus differential backup protection, time synchronization errors among IEDs should be compensated because differential current errors due to time synchronization errors can result in mis-operation of the IED. On the other hand, to transmit GOOSE periodically, the statistical calculation model is needed to update data. In this paper, we propose a method for compensating time synchronization errors using Lagrange interpolation with reference voltages measured at each IED. The test result shows that the proposed method can reduce the differential current error significantly |