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Extreme learning machine-based estimation of total transfer capability of transmission corridors in wind-integrated power systems |
DOI:10.7667/PSPC180610 |
Key Words:wind power total transfer capability (TTC) data mining scenario clustering RELIEF-F based feature selection differential evolution extreme learning machine (DE-ELM) |
Author Name | Affiliation | XU Weiting | Sichuan Electric Power Corporation Power Economic Research Institute, Chengdu 610041, China | LIU Junyong | College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, China | TANG Quan | Sichuan Electric Power Corporation Power Economic Research Institute, Chengdu 610041, China | QIU Gao | College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, China | WANG Yunling | Sichuan Electric Power Corporation Power Economic Research Institute, Chengdu 610041, China | YANG Xinting | Sichuan Electric Power Corporation Power Economic Research Institute, Chengdu 610041, China | LI Ao | Sichuan Electric Power Corporation Power Economic Research Institute, Chengdu 610041, China |
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Abstract:Central integration of wind farmmakes it hard to effectively compute Total Transfer Capability (TTC) through traditional way. For this reason,a data mining technique named Differential Evolution Extreme Learning Machine (DE-ELM) is proposed to extract operating rules for the TTC of tie-lines in wind-integrated power systems. Representative operating scenarios are firstly determined by K-medoids clustering under the two-dimensional “wind power-load consumption” feature space. Then knowledge base for TTC operation rule mining is generated by stochastic sampling and repeated power flow. Secondly, to reduce the ultra-high dimensionality of operating features, RELIEF-F algorithm is employed to screen the redundant features and identify the features that are strongly correlated to the TTC. Finally, the TTC operation rules are extracted from the knowledge base by feeding training data into the DE-ELM. Numerical results show that the proposed method can fast estimate TTC with satisfying accuracy and strong generalization. This work is supported by National Natural Science Foundation of China (No. 51437003) and Science and Technology Project of State Grid Sichuan Electric Power Company (No. SGSCJY00JHJS201700009). |
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