Use of local measurements to estimate voltage-stability margin Conference Paper uri icon

abstract

  • Estimating the proximity of power systems to voltage collapse in real time still faces difficulties. Beside the data-management and computational issues, any central-control method is subject to the reliability of long-distance data communications. In the paper, we describe a new data-processing method to estimate the proximity to voltage collapse. The method (code-named SMARTDevice, for Stability Monitoring And Reference Tuning Device) employs only local measurements - bus voltage and load current - and calculates the strength of the transmission system relative to the bus. The collapse occurs when the local load approaches this value. The method is simple enough so that it can be implemented in a numerical relay. The performance of SMARTDevice is compared against the conventional undervoltage relay. It is shown that the latter can misoperate while the new device does not. SMARTDevice is in fact a new breed of voltage relays whose setpoint is automatically tuned to the system condition.

name of conference

  • Proceedings of the 20th International Conference on Power Industry Computer Applications

published proceedings

  • PROCEEDINGS OF THE 20TH INTERNATIONAL CONFERENCE ON POWER INDUSTRY COMPUTER APPLICATIONS

author list (cited authors)

  • Vu, K., Begovic, M. M., Novosel, D., & Saha, M. M.

complete list of authors

  • Vu, K||Begovic, MM||Novosel, D||Saha, MM

publication date

  • January 1, 1996 11:11 AM