AGC system identification method based on big data and Bayesian neural network
A neural network and system identification technology, applied in the field of AGC system identification based on big data and Bayesian neural network, can solve the problems of big data and retrograde intelligent identification without giving practical guidance, so as to improve the level of automatic control and achieve better results. Recognition accuracy, the effect of improving speed and accuracy
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[0082] In order to verify that the AGC system identification method proposed in this application has high identification accuracy and fast convergence speed, the historical operation data of a 1000MW ultra-supercritical unit was collected, and the high-profile gate valve position, feedwater flow rate and total fuel volume were selected as model inputs The actual power, the temperature at the middle point and the main steam pressure are used as the output of the model. 16381 sets of data have been collected, and the sampling interval is 0.01s. The observed input and output curves are as follows: Figure 2-7 shown.
[0083] According to the identification method proposed in this application, after zero initialization, data denoising, normalization and other preprocessing are performed on all data, 1000 sets of data are selected as sample data by using the nearest neighbor method, and the selected sample data curve is as follows Figures 8 to 13 shown. The sampling data other th...
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