Power plant de-superheater water spray flow optimization by artificial neural networks

سال انتشار: 1394
محل انتشار: اولین کنفرانس ملی رویکردهای نوین و کاربردی در مهندسی مکانیک
کد COI اختصاصی: NAAME01_069
زبان مقاله: انگلیسی
تعداد مشاهده: 505

نویسندگان

چکیده

Abstract— This paper deals with modeling a power plant component with mild nonlinear characteristics using a modified neural network structure. The hidden layer of the proposed neural network has a combination of neurons with linear and nonlinear activation functions. This approach is particularly suitable for nonlinear system with a low grade of nonlinearity, which cannot be modeled satisfactorily by neural networks with purely nonlinear hidden layers or by the method of least square of errors (the ideal modeling method of linear systems). In this approach, two channels are installed in a hidden layer of the neural network to cover both linear and nonlinear behavior of systems. If the nonlinear characteristics of the system (i.e. de-superheater) are not negligible, then the nonlinear channel of the neural network is activated; that is, after training, the connections in nonlinear channel get considerable weights. The approach was applied to a de-superheater of a 325 MW power generating plant. The actual plant response, obtained from field experiments, is compared with the response of the proposed model and the responses of linear and neuro-fuzzy models as well as a neural network with purely nonlinear hidden layer. A better accuracy is observed using the proposed approach.

کلیدواژه ها

Superheater, power plant, neural network,Attemperator

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