Event-based non-intrusive load identification algorithm for residential loads combined with underdetermined decomposition and characteristic filtering
For intelligent power utilisation of demand side management, the implementation of non-intrusive load identification is an important technology. This study proposed an event-based non-intrusive load identification algorithm for residential loads combined with underdetermined decomposition and charac...
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| Published in | IET generation, transmission & distribution Vol. 13; no. 1; pp. 99 - 107 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
The Institution of Engineering and Technology
08.01.2019
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1751-8687 1751-8695 1751-8695 |
| DOI | 10.1049/iet-gtd.2018.6125 |
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| Abstract | For intelligent power utilisation of demand side management, the implementation of non-intrusive load identification is an important technology. This study proposed an event-based non-intrusive load identification algorithm for residential loads combined with underdetermined decomposition and characteristic filtering. This method first needs to monitor the circuit in real time. After detecting an electrical switching event, the load decomposition and identification are performed. By combining the operating habits of the electrical equipment, the problem that the single current signal is difficult to solve by multi-dimensional under-determination is optimised as a one-dimensional under-determination problem. The objective function is established based on the sparsity of current in the frequency domain. The two-step iterative shrinkage threshold algorithm is used to get the optimal solution to achieve load decomposition. Then, according to the unique harmonic components of each power load, this study establishes the characteristic filtering to filter the decomposition current, which realises load recognition. The algorithm is verified by actual data measured in a household. It can obtain the individual load current and accurately judge the load status, which proves the accuracy and effectiveness of the algorithm. |
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| AbstractList | For intelligent power utilisation of demand side management, the implementation of non-intrusive load identification is an important technology. This study proposed an event-based non-intrusive load identification algorithm for residential loads combined with underdetermined decomposition and characteristic filtering. This method first needs to monitor the circuit in real time. After detecting an electrical switching event, the load decomposition and identification are performed. By combining the operating habits of the electrical equipment, the problem that the single current signal is difficult to solve by multi-dimensional under-determination is optimised as a one-dimensional under-determination problem. The objective function is established based on the sparsity of current in the frequency domain. The two-step iterative shrinkage threshold algorithm is used to get the optimal solution to achieve load decomposition. Then, according to the unique harmonic components of each power load, this study establishes the characteristic filtering to filter the decomposition current, which realises load recognition. The algorithm is verified by actual data measured in a household. It can obtain the individual load current and accurately judge the load status, which proves the accuracy and effectiveness of the algorithm. |
| Author | Han, Xiao Wu, Xin Liang, Kai Xin |
| Author_xml | – sequence: 1 givenname: Xin surname: Wu fullname: Wu, Xin email: 19861002wuxin@163.com organization: School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, People's Republic of China – sequence: 2 givenname: Xiao surname: Han fullname: Han, Xiao organization: School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, People's Republic of China – sequence: 3 givenname: Kai Xin surname: Liang fullname: Liang, Kai Xin organization: School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, People's Republic of China |
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| Copyright | The Institution of Engineering and Technology 2019 The Authors. IET Generation, Transmission & Distribution published by John Wiley & Sons, Ltd. on behalf of The Institution of Engineering and Technology |
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| Keywords | harmonic components load status iterative methods residential loads intelligent power utilisation characteristic filtering electrical switching event single current signal load current load decomposition load recognition event-based nonintrusive load identification algorithm one-dimensional under-determination problem frequency domain power load multidimensional under-determination electrical equipment demand side management two-step iterative shrinkage threshold algorithm underdetermined decomposition objective function |
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| Snippet | For intelligent power utilisation of demand side management, the implementation of non-intrusive load identification is an important technology. This study... For intelligent power utilisation of demand side management, the implementation of non‐intrusive load identification is an important technology. This study... |
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| SubjectTerms | characteristic filtering demand side management electrical equipment electrical switching event event‐based nonintrusive load identification algorithm frequency domain harmonic components intelligent power utilisation iterative methods load current load decomposition load recognition load status multidimensional under‐determination objective function one‐dimensional under‐determination problem power load Research Article residential loads single current signal two‐step iterative shrinkage threshold algorithm underdetermined decomposition |
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| Title | Event-based non-intrusive load identification algorithm for residential loads combined with underdetermined decomposition and characteristic filtering |
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