Transient state analysis in a power grid including under frequency load shedding
Main Article Content
Abstract
The paper presents an analysis of selected transient states of an industrial power grid. It was assumed that power sources with voltage and rotation control systems are installed in the grid. Interaction of the generation units’ control systems with under frequency load shedding relays was analysed. The study included a comparative analysis of transient states for various under frequency load shedding algorithms. The analysis concerned the uncertainty of parameters of selected mathematical models of the power system’s components. Model parameters’ uncertainty was considered by multiple simulations and outlining the envelope (stop bands) of the family of the analysed signals’ waveforms. To estimate the simulation results’ reliability appropriate statistical indicators were used.
Article Details
References
F.P. Mello de, L.H. Hannett, “Validation of synchronous machine models and derivation of model parameters from tests”, IEEE Transaction on Power Apparatus and Systems, Vol. 100, No. 2, 1981, pp. 662–672.
“Dokumentacja techniczna układu wzbudzenia Unitrol firmy ABB” [Technical documentation ABB Unitrol excitation unit].
A. Halinka, P. Rzepka, M. Szablicki, “Systemy automatyki częstotliwościowego odciążania i bilansowania mocy czynnej obszarów sieciowych” [Systems of automatic under frequency active power load shedding and balancing in grid areas], Przegląd Elektrotechniczny, Yearbook 90, No. 8, 2015, pp.105–109.
M.H. Kalos, P.A. Whitlock, “Monte Carlo methods”, WILEY Verlag GmbH & Co., Weinheim 2008.
A. Klimpel, “Odciążanie jako ostateczny środek obrony KSE” [Load shedding as the ultimate national power system defence], Elektroenergetyka, No. 3–4 (13–14), 2012, pp. 84–97.
A. Klimpel, “Zabezpieczenia póładaptacyjne podczęstotliwościowei podczęstotliwościowe SCO” [Semi-adaptive sub-frequency UFSL protections], conference proceedings of scientific-technical conference „Technologie w energetyce”, 22–25.05.2015, pp. 31–55.
P.C. Krause, “Analysis of electric machinery”, McGraw-Hill Book Company, New York 1986.
J. Machowski, J.W. Bialek, J.R. Bumby, “Power System Dynamics: Stability and Control”, John Wiley & Sons, 2008.
S.J. Nanou, O.D. Tzortzopoulos, S.A. Papathanassiou, “Evaluation of an enhanced power dispatch control scheme for multi-terminal HVDC grids using Monte-Carlo simulation”, Electric Power Systems Research, Vol. 140, November 2016, pp. 925–932.
A. Nocoń, S. Paszek, “Sensitivity analysis of power system stability factors including the uncertainty of mathematical models parameters”, Kwartalnik Elektryka, Vol. 2 (218), 2011, pp. 7–17.
A. Nocoń, S. Paszek, “Transient states and island mode operation of industrial electricity networks”, in: 13th Selected Issues of Electrical Engineering and Electronics (WZEE), Rzeszów 2016, pp. 1–6.
S. Paszek et al., “Pomiarowa estymacja paramentów dynamicznych generatorów synchronicznych i układów wzbudzenia pracujących w krajowym systemie elektroenergetycznym” [Measurement estimation of dynamic parameters of synchronous generators and excitation systems operated in the national power system], Silesian University of Technology Publishers, Gliwice 2013.
S. Paszek, A. Nocoń, “Parameter polyoptimization of PSS2A power system stabilizers operating in a multi-machine power system including the uncertainty of model parameters”, Applied Mathematics and Computation, No. 267, 2014, pp. 750–757.
S. Raychaudhuri, “Introduction to Monte Carlo simulation”, Proceedings of the 2008 Winter Simulation Conference [online], http://www.informs-sim.org/wsc08papers/012.pdf [access: 9.05.2016].
S. Robak, “Źródła niepewności w analizie systemów elektroenergetycznych” [Uncertainty sources in power system analysis], Przegląd Elektrotechniczny, No. 84 (1), 2008, pp. 54–57.
A. Zimny, “Statystyka opisowa” [Descriptive statistics], State University of Applied Sciences in Konin Publishers, Konin 2010.