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Low-order dynamic equivalent estimation of power systems using data of phasor measurement units

Shiroei, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijepes.2015.07.015
  3. Publisher: Elsevier Ltd
  4. Abstract:
  5. This paper utilizes data measured by phasor measurement units (PMUs) to extract a low-order dynamic equivalent model for power system stability studies. The estimated model is a 2-order model for synchronous machines. This model has the advantage of simplicity of classical model and considerably reduces the oversimplifying error of classical model. This method offers an alternative approach to analytical model reduction techniques based on the detailed system models. The proposed method uses the synchronized bus voltage and current phasors measured by PMUs. Using post disturbance data, electrical and mechanical parameters of the equivalent generator are estimated sequentially. Furthermore, a new approach for estimation of two-machine and single machine infinite bus (SMIB) equivalent systems are presented for analysis of electromechanical oscillations. To evaluate the performance of the proposed approach, simulations are performed on a two area 13-bus test system and real measured PMU data. Simulation results show that the estimated model can represent the dynamic behavior of the studied system with good approximation
  6. Keywords:
  7. Power system model reduction ; Power system oscillations ; Circuit oscillations ; Electric power system measurement ; Phase measurement ; System stability ; Units of measurement ; Electromechanical oscilla-tions ; Model estimation ; Model reduction techniques ; Phasor measurement unit (PMUs) ; Power system model ; Power system stability ; Single machine infinite bus
  8. Source: International Journal of Electrical Power and Energy Systems ; Volume 74 , 2016 , Pages 134-141 ; 01420615 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0142061515003014