Open Access

ARTICLE

Probabilistic Load Flow Calculation of Power System Integrated with Wind Farm Based on Kriging Model

Lu Li¹, Yuzhen Fan², Xinglang Su^1,*, Gefei Qiu¹

1 Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650500, China
2 School of Control and Computer Engineering, North China Electric Power University, Beijing, 102206, China

* Corresponding Author: Xinglang Su. Email:

(This article belongs to the Special Issue: Wind Energy Development and Utilization)

Energy Engineering 2021, 118(3), 565-580. https://doi.org/10.32604/EE.2021.014627

Received 13 October 2020; Accepted 29 October 2020; Issue published 22 March 2021

Abstract

Because of the randomness and uncertainty, integration of large-scale wind farms in a power system will exert significant influences on the distribution of power flow. This paper uses polynomial normal transformation method to deal with non-normal random variable correlation, and solves probabilistic load flow based on Kriging method. This method is a kind of smallest unbiased variance estimation method which estimates unknown information via employing a point within the confidence scope of weighted linear combination. Compared with traditional approaches which need a greater number of calculation times, long simulation time, and large memory space, Kriging method can rapidly estimate node state variables and branch current power distribution situation. As one of the generator nodes in the western Yunnan power grid, a certain wind farm is chosen for empirical analysis. Results are used to compare with those by Monte Carlo-based accurate solution, which proves the validity and veracity of the model in wind farm power modeling as output of the actual turbine through PSD-BPA.

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Keywords

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