Use of SQP optimization algorithm to size a multiphysical system: Application to an aircraft electrical power channel
ISSN: 0332-1649
Article publication date: 5 March 2018
Abstract
Purpose
Static converters generate current harmonics in power grids. For numerous studies, analytical frequency modeling is preferred to carry out their harmonic modeling in the context of sizing by optimization. However, a design by optimization has to consider other constraints, e.g. modeling constraints and operating constraints. In this way, this paper aims to focus on applying an analytical frequency modeling on the sizing by optimization of an aircraft electrical power channel.
Design/methodology/approach
The paper aims to size a multiphysical system by optimization. In this way, the sizing of an aircraft electrical power channel by optimization has been carried out. The models of all the channel components are analytical. Specifically, the frequency model of the power electronics is based on Tran et al. (2016) and is made of equalities and inequalities. Due to this modeling choice, the optimization satisfies hundreds of constraints, such as modeling constraints and static converter operating constraints. Furthermore, transient constraints are only verified after optimization.
Findings
The difficulty is the modeling of the system by taking into account nonlinear implicit equations having several solutions. A solution is the addition of inequality constraints to the model to guide the implicit solving. Furthermore, this greatly helps the optimization algorithm to find the good operating mode of the static converter, at steady state. This aspect is indispensable to validate the sizing model.
Research limitations/implications
The number of the configurations per operating period of the static converters is defined a priori and limited.
Originality/value
The analytical model for the sizing is formulated as a constrained optimization problem. Its solving and the sizing by optimization are carried out by the same optimization algorithm.
Keywords
Citation
Tran, L.N.H., Gerbaud, L., Retière, N. and Nguyen Huu, H. (2018), "Use of SQP optimization algorithm to size a multiphysical system: Application to an aircraft electrical power channel", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 37 No. 2, pp. 661-680. https://doi.org/10.1108/COMPEL-12-2016-0519
Publisher
:Emerald Publishing Limited
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