access icon free Probabilistic load flow with correlated wind power sources using a frequency and duration method

© The Institution of Engineering and Technology
Received 12/09/2018, Accepted 11/07/2019, Revised 03/01/2019, Published 24/07/2019

Probabilistic load flow (PLF) is an important tool in power system planning and operation. One limitation of conventional PLF is that only the probability information of random variables is obtained as a reference for related analyses. Frequency and duration information often plays an important role in power system assessment. In this study, a frequency and duration method for PLF with correlated wind power sources and loads is proposed based on Latin hypercube sampling (LHS), Nataf transformation, and Markov chains. In the proposed method, the spatial and temporal correlations among wind power sources and loads are addressed using Nataf transformation and Markov chains, which are incorporated into the LHS framework to solve the PLF problem with frequency and duration quantities. With the proposed method, not only the probability information but also the frequency and duration information of the random output variables in a PLF problem can be efficiently and accurately obtained. The performance of the proposed PLF method is verified using comparative tests on three modified test systems.

Inspec keywords: probability; statistical distributions; Monte Carlo methods; wind power plants; sampling methods; load flow; Markov processes

Other keywords: duration information; temporal correlations; Nataf transformation; conventional PLF; PLF problem; duration method; PLF method; power system assessment; probabilistic load flow; power system planning; duration quantities; random output variables; spatial correlations; correlated wind power sources; probability information; Markov chains

Subjects: Other topics in statistics; Monte Carlo methods; Wind power plants

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