scholarly journals Parameter Identification of Pump Turbine Governing System Using an Improved Backtracking Search Algorithm

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1668 ◽  
Author(s):  
Jianzhong Zhou ◽  
Chu Zhang ◽  
Tian Peng ◽  
Yanhe Xu
Keyword(s):  
Parameter Identification ◽  
Search Algorithm ◽  
Pump Turbine ◽  
Backtracking Search ◽  
Backtracking Search Algorithm ◽  
Governing System

Parameter Identification of Nonlinear Muskingum Model with Backtracking Search Algorithm

2016 ◽  
Vol 30 (8) ◽  
pp. 2767-2783 ◽  
Author(s):  
Xiaohui Yuan ◽  
Xiaotao Wu ◽  
Hao Tian ◽  
Yanbin Yuan ◽  
Rana Muhammad Adnan
Keyword(s):  
Parameter Identification ◽  
Search Algorithm ◽  
Backtracking Search ◽  
Backtracking Search Algorithm ◽  
Muskingum Model ◽  
Nonlinear Muskingum Model

scholarly journals Modeling and Synchronous Optimization of Pump Turbine Governing System Using Sparse Robust Least Squares Support Vector Machine and Hybrid Backtracking Search Algorithm

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3108 ◽  
Author(s):  
Chu Zhang ◽  
Chaoshun Li ◽  
Tian Peng ◽  
Xin Xia ◽  
Xiaoming Xue ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Least Squares ◽  
Search Algorithm ◽  
Support Vector ◽  
Backtracking Search ◽  
Backtracking Search Algorithm ◽  
Governing System ◽  
Robust Least Squares ◽  
Pumped Storage ◽  
Identification Model

In view of the complex and changeable operating environment of pumped storage power stations and the noise and outliers in the modeling data, this study proposes a sparse robust least squares support vector machine (LSSVM) model based on the hybrid backtracking search algorithm for the model identification of a pumped turbine governing system. By introducing the maximum linearly independent set, the sparsity of the support vectors of the LSSVM model are realized, and the complexity is reduced. The robustness of the identification model to noise and outliers is enhanced using the weighted function based on improved normal distribution. In order to further improve the accuracy and generalization performance of the sparse robust LSSVM identification model, the model input variables, the kernel parameters, and the regularization parameters are optimized synchronously using a binary-real coded backtracking search algorithm. Experiments on two benchmark problems and a real-world application of a pumped turbine governing system in a pumped storage power station in China show that the proposed sparse robust LSSVM model optimized by the hybrid backtracking search algorithm can not only obtain higher identification accuracy, it also has better robustness and a higher generalization performance compared with the other existing models.

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