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Date of Publication:2022-10-06

Journal:中国电机工程学报

Affiliation of Author(s):电子信息与电气工程学部

Volume:37

Issue:2

Page Number:557-563

ISSN No.:0258-8013

Abstract:Power system dispatch becomes having much uncertainty due to large-scale
   wind power integration into power grid, and the interval dispatch
   results provides the range of the optimized objective function for
   operating workers in power grid. This paper proposed a nonlinear dual
   optimization method for interval economic dispatch, in which the
   nonlinear factors such as valve point loading effects were considered.
   Wind power output was described as an interval variable, and bi-level
   nonlinear optimistic and pessimistic models were set up. This paper
   combined nonlinear dual theory with primal-dual interior point method to
   solve bi-level nonlinear pessimistic model. According to nonlinear dual
   theory, interior level model was transformed to dual model, and the
   problem was solved after transforming the bi-level model to conventional
   model. And then the range of total generation cost and the corresponding
   generator power output were obtained for generating decision-making in
   the future. A ten-unit test system with a wind farm is used to
   illustrate the effectiveness of the proposed method.

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