Dissipating Potential-Based Method for Forced Oscillation Location Estimation

Forced oscillations may be excited by periodical disturbance caused by malfunctions in exciters, power system stabilizers, governors and so on. Forced oscillations cannot be fully mitigated until the source is identified and removed. Therefore, fast and accurate source location is of importance for forced oscillation mitigation in interconnected power grids. This paper proposes a dissipating potential-based method to locate the source of forced oscillation. This method creates virtual transmission lines according to the monitored buses’ location, estimate the virtual dissipating energy flow with partial system observation. Then dissipating potential is proposed and calculated to locate the exciting source. The developed method is tested with the IEEE test case library of power system sustained oscillations, which are simulated forced oscillation events in a reduced 179 -bus WECC model with partial observation of the system. Also, the tool is tested using an actual forced oscillation event in EI. The test results demonstrate the effectiveness of the tool in forced oscillation source location.