Thermal efficiency is an important indicator for the evaluation of boiler equipment performance and unit operation economy. For the high-dimensional nonlinearity between thermal efficiency and auxiliary variables
Random forest algorithm was used to carry out supervised dimensionality reduction
and the convolutional neural network (CNN) for variable load conditions was proposed to construct a dynamic model of thermal efficiency in view of the typical time-series characteristics of boiler. In order to ensure that the model was lightweight
a channel equalization block was introduced into the conventional CNN with three convolutional layers to solve the problem of channel collapse due to the suppression of feature maps
and a thermal efficiency prediction model based on channel equalization CNN (CE-CNN) was constructed. Simulation experiments were conducted using historical data from a 600 MW real boiler. Results show that the CE-CNN achieves a root mean square error of (0.1010.008)%
reducing training time by 29.97% compared to a 6-layer CNN
which validates the effectiveness of the model.
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references
ESLICK J C, ZAMARRIPA M A, MA Jinjiang, et al. Predictive modeling of a subcritical pulverized-coal power plant for optimization: parameter estimation, validation, and application[J]. Applied Energy, 2022, 319: 119226.
员盼锋, 徐舒涵, 丹慧杰, 等. 基于火电厂源侧的综合能源系统集成及优化配置研究[J]. 动力工程学报, 2024, 44(4): 650-657. YUAN Panfeng, XU Shuhan, DAN Huijie, et al. Integration and optimal allocation of integrated energy system based on source side of thermal power plant[J]. Journal of Chinese Society of Power Engineering, 2024, 44(4): 650-657.
ZHAO Huirong, SHEN Jiong, LI Yiguo, et al. Coal-fired utility boiler modelling for advanced economical low-NO x combustion controller design[J ] . Control Engineering Practice, 2017, 58: 127-141.
喻聪. 电站锅炉燃烧优化及低NO x 排放控制若干问题研究[D ] . 南京: 东南大学, 2019.
DAL SECCO S, JUAN O, LOUIS-LOUISY M, et al. Using a genetic algorithm and CFD to identify low NO x configurations in an industrial boiler[J ] . Fuel, 2015, 158: 672-683.
ZHOU Hao, CEN Kefa, MAO Jianbo. Combining neural network and genetic algorithms to optimize low NO x pulverized coal combustion[J ] . Fuel, 2001, 80(15): 2163-2169.
SHI Yan, ZHONG Wenqi, CHEN Xi, et al. Combustion optimization of ultra supercritical boiler based on artificial intelligence[J]. Energy, 2019, 170: 804-817.
李杨, 蓝茂蔚, 赵国钦, 等. 基于PCA-PSO-LSSVM的电站锅炉效率预测模型研究[J]. 热力发电, 2021, 50(12): 43-50. LI Yang, LAN Maowei, ZHAO Guoqin, et al. Study on prediction model of utility boiler efficiency based on PCA-PSO-LSSVM[J]. Thermal Power Generation, 2021, 50(12): 43-50.
ZHAO Yufan, LIU Han, GUO Runyuan, et al. Air preheater rotor deformation soft sensor based on wavelet analysis and SVR[C]//Proceedings of the 2020 Chinese Automation Congress (CAC). Shanghai: IEEE, 2020: 4490-4495.
何宁, 谢天, 尹俊杰, 等. 燃煤机组变负荷瞬态过程的实时能耗分析[J]. 动力工程学报, 2023, 43(2): 158-164. HE Ning, XIE Tian, YIN Junjie, et al. Real-time energy consumption analysis of coal-fired power units during load change transient processes[J]. Journal of Chinese Society of Power Engineering, 2023, 43(2): 158-164.
文乐, 付龙龙, 杨新民. 超临界直流锅炉实际蓄热系数计算分析[J]. 热能动力工程, 2018, 33(12): 105-110. WEN Le, FU Longlong, YANG Xinmin. Calculation and analysis of actual heat storage coefficient for supercritical once-through boilers[J]. Journal of Engineering for Thermal Energy and Power, 2018, 33(12): 105-110.
ZHANG Y G. Combustion control of utility boiler based on GRU neural network[J]. International Core Journal of Engineering, 2022, 8(1): 665-667.
CHEN Wanghu, ZHAI Chenhan, WANG Xin, et al. GCN-and GRU-based intelligent model for temperature prediction of local heating surfaces[J]. IEEE Transactions on Industrial Informatics, 2023, 19(4): 5517-5529.
TUTTLE J F, BLACKBURN L D, ANDERSSON K, et al. A systematic comparison of machine learning methods for modeling of dynamic processes applied to combustion emission rate modeling[J]. Applied Energy, 2021, 292: 116886.
XIE Peiran, GAO Mingming, ZHANG Hongfu, et al. Dynamic modeling for NO x emission sequence prediction of SCR system outlet based on sequence to sequence long short-term memory network[J ] . Energy, 2020, 190: 116482.
WANG Zhi, PENG Xianyong, ZHOU Huaichun, et al. A dynamic modeling method using channel-selection convolutional neural network: a case study of NO x emission[J ] . Energy, 2024, 290: 130270.
LI Nan, HU Yong. The deep convolutional neural network for NO x emission prediction of a coal-fired boiler[J ] . IEEE Access, 2020, 8: 85912-85922.
YANG Guotian, WANG Yingnan, LI Xinli. Prediction of the NO x emissions from thermal power plant using long-short term memory neural network[J ] . Energy, 2020, 192: 116597.
TANG Zhehao, WANG Shikui, CHAI Xiangying, et al. Auto-encoder-extreme learning machine model for boiler NO x emission concentration prediction[J ] . Energy, 2022, 256: 124552.
BREIMAN L. Bagging predictors[J]. Machine Learning, 1996, 24(2): 123-140.
VERIKAS A, GELZINIS A, BACAUSKIENE M. Mining data with random forests: a survey and results of new tests[J]. Pattern Recognition, 2011, 44(2): 330-349.
MEHTA D, KIM K I, THEOBALT C. On implicit filter level sparsity in convolutional neural networks[C]//Proceedings of the 2019 IEEE/CVF Conference on Computer Vision and Pattern Recognition. Long Beach: IEEE, 2019: 520-528.
IOFFE S, SZEGEDY C. Batch normalization: accelerating deep network training by reducing internal covariate shift[C]//Proceedings of the 32nd International Conference on International Conference on Machine Learning. Lille: JMLR. org, 2015: 448-456.
HUANG Lei, YANG Dawei, LANG Bo, et al. Decorrelated batch normalization[C]//Proceedings of the 2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition. Salt Lake City: IEEE, 2018: 791-800.
KIM J H. Further improvement of Jensen inequality and application to stability of time-delayed systems[J]. Automatica, 2016, 64: 121-125.
YANG Jianwei, REN Zhile, GAN Chuang, et al. Cross-channel communication networks[C]//Proceedings of the 33rd International Conference on Neural Information Processing Systems. Vancouver: Curran Associates Inc., 2019: 1297-1306.
LEHMANN R. 3 -rule for outlier detection from the viewpoint of geodetic adjustment[J ] . Journal of Surveying Engineering, 2013, 139(4): 157-165.
JEON Y, KIM J. Active convolution: learning the shape of convolution for image classification[C]//Proceedings of the 2017 IEEE Conference on Computer Vision and Pattern Recognition. Honolulu: IEEE, 2017: 1846-1854.
GREFF K, SRIVASTAVA R K, KOUTNK J, et al. LSTM: a search space odyssey[J]. IEEE Transactions on Neural Networks and Learning Systems, 2017, 28(10): 2222-2232.
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