A New Method for Online Steady-State Power Flow Calculation in Electric Power System

Abstract:

Owing to the given variables are measurable in online power flow calculation, the electrical variables of higher measuring accuracy should be chosen for calculation. Currently the theory of reactive power is deficient and several methods for reactive power measurement are briefly introduced in this paper. The inaccuracy of those methods is pointed out by the relevant references in non-sinusoidal conditions. The measuring accuracy of Active power directly obtained by voltage and current is the same as that of voltage and current. For increasing the accuracy of online power flow calculation, a method substituting voltage magnitude for reactive power is proposed in this paper. The new method eliminates the effects resulted from inaccurate reactive power measurement. The simulation results on software MATPOWER verify the correctness and rationality of the new method.

• Periodical: Advanced Materials Research (Volumes 816-817)
• Pages: 1090-1093
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.816-817.1090
• Online since: September 2013
• Authors: Hai Bao, Xin Huang, Ling Wang, Gang Liu
• Keywords: Newton-Raphson Method, Online Power Flow Calculation, Reactive Power Measurement

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