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Energies 2016, 9(12), 1041; doi:10.3390/en9121041

A Parallel Probabilistic Load Flow Method Considering Nodal Correlations

1
Shaanxi Key Laboratory of Smart Grid, State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
Northwest Subsection of State Grid Corporation of China, Xi’an 710048, China
*
Author to whom correspondence should be addressed.
Academic Editor: Gianfranco Chicco
Received: 2 November 2016 / Revised: 24 November 2016 / Accepted: 26 November 2016 / Published: 10 December 2016
(This article belongs to the Special Issue Advances in Power System Operations and Planning)
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Abstract

With the introduction of more and more random factors in power systems, probabilistic load flow (PLF) has become one of the most important tasks for power system planning and operation. Cumulants-based PLF is an effective algorithm to calculate PLF in an analytical way, however, the correlations among the nodal injections to the system level have rarely been studied. A novel parallel cumulants-based PLF method considering nodal correlations is proposed in this paper, which is able to deal with the correlations among all system nodes, and avoid the Jacobian matrix inversion in the traditional cumulants-based PLF as well. In addition, parallel computing is introduced to improve the efficiency of the numerical calculations. The accuracy of the proposed method is validated by numerical tests on the standard IEEE-14 system, comparing with the results from Correlation Latin hypercube sampling Monte Carlo Simulation (CLMCS) method. And the efficiency and parallel performance is proven by the tests on the modified IEEE-300, C703, N1047 systems with distributed generation (DG). Numerical simulations show that the proposed parallel cumulants-based PLF method considering nodal correlations is able to get more accurate results using less computational time and physical memory, and have higher efficiency and better parallel performance than the traditional one. View Full-Text
Keywords: correlation matrix; Correlation Latin hypercube sampling Monte Carlo Simulation (CLMCS); cumulants; distributed generation (DG); parallel computing; probabilistic load flow (PLF) correlation matrix; Correlation Latin hypercube sampling Monte Carlo Simulation (CLMCS); cumulants; distributed generation (DG); parallel computing; probabilistic load flow (PLF)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, J.; Hao, X.; Cheng, P.; Fang, W.; Niu, S. A Parallel Probabilistic Load Flow Method Considering Nodal Correlations. Energies 2016, 9, 1041.

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