Probabilistic Load Flow Based on Holomorphic Embedding, Kernel Density Estimator and Saddle Point Approximation Including Correlated Uncertainty Variables

2020 ◽  
Vol 183 ◽  
pp. 106178
Author(s):  
Ali Reza Abbasi

2018 ◽  
Vol 9 (5) ◽  
pp. 4796-4804 ◽  
Author(s):  
Mohammad Mohammadi ◽  
Hooman Basirat ◽  
Amin Kargarian


Author(s):  
Meghdad Tourandaz Kenari ◽  
Mohammad Sadegh Sepasian ◽  
Mehrdad Setayesh Nazar

Purpose The purpose of this paper is to present a new cumulant-based method, based on the properties of saddle-point approximation (SPA), to solve the probabilistic load flow (PLF) problem for distribution networks with wind generation. Design/methodology/approach This technique combines cumulant properties with the SPA to improve the analytical approach of PLF calculation. The proposed approach takes into account the load demand and wind generation uncertainties in distribution networks, where a suitable probabilistic model of wind turbine (WT) is used. Findings The proposed procedure is applied to IEEE 33-bus distribution test system, and the results are discussed. The output variables, with and without WT connection, are presented for normal and gamma random variables (RVs). The case studies demonstrate that the proposed method gives accurate results with relatively low computational burden even for non-Gaussian probability density functions. Originality/value The main contribution of this paper is the use of SPA for the reconstruction of probability density function or cumulative distribution function in the PLF problem. To confirm the validity of the method, results are compared with Monte Carlo simulation and Gram–Charlier expansion results. From the viewpoint of accuracy and computational cost, SPA almost surpasses other approximations for obtaining the cumulative distribution function of the output RVs.





1981 ◽  
Vol 128 (5) ◽  
pp. 280 ◽  
Author(s):  
R.N. Allan ◽  
A.M. Léite da Silva






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