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Load frequency control for multi-area power systems: A new type-2 fuzzy approach based on Levenberg-Marquardt
Ali Dokht Shakibjoo1, Mohammad Moradzadeh2, Seyed Zeinolabedin Moussavi1
1Department of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran.
Abstract:
In this study, a new fuzzy approach is proposed for load frequency control (LFC) of a multi-area power system. The main control system is constructed by use of interval type-2 fuzzy inference systems (IT2FIS) and fractional-order calculus. In designing the controller, there is no need for the system dynamics, therefore the system Jacobian is obtained by a multilayer perceptron neural network (MLP-NN). Uncertainties are modeled by IT2FIS, and for training fuzzy parameters, Levenberg-Marquardt algorithm (LMA) is used, which is faster and more robust than gradient descent algorithm (GDA). The system stability is studied by Matignon's stability method under time-varying disturbances. A comparison between the proposed controller with type-1 fuzzy controller on the New England 39-bus test system is also carried out. The simulations demonstrate the superiority of the designed controller.
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