Marginalize, Rather than Impute: Probabilistic Wind Power Forecasting with Incomplete Data
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866917120320733184 |
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| author | Wen, Honglin Pinson, Pierre Gu, Jie Jin, Zhijian |
| author_facet | Wen, Honglin Pinson, Pierre Gu, Jie Jin, Zhijian |
| contents | Machine learning methods are widely and successfully used for probabilistic wind power forecasting, yet the pervasive issue of missing values (e.g., due to sensor faults or communication outages) has received limited attention. The prevailing practice is impute-then-predict, but conditioning on point imputations biases parameter estimates and fails to propagate uncertainty from missing features. Our approach treats missing features and forecast targets uniformly: we learn a joint generative model of features and targets from incomplete data and, at operational deployment, condition on the observed features and marginalize the unobserved ones to produce forecasts. This imputation-free procedure avoids error introduced by imputation and preserves uncertainty aroused from missing features. In experiments, it improves forecast quality in terms of continuous ranked probability score relative to impute-then-predict baselines while incurring substantially lower computational cost than common alternatives. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_03631 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Marginalize, Rather than Impute: Probabilistic Wind Power Forecasting with Incomplete Data Wen, Honglin Pinson, Pierre Gu, Jie Jin, Zhijian Machine Learning Systems and Control Machine learning methods are widely and successfully used for probabilistic wind power forecasting, yet the pervasive issue of missing values (e.g., due to sensor faults or communication outages) has received limited attention. The prevailing practice is impute-then-predict, but conditioning on point imputations biases parameter estimates and fails to propagate uncertainty from missing features. Our approach treats missing features and forecast targets uniformly: we learn a joint generative model of features and targets from incomplete data and, at operational deployment, condition on the observed features and marginalize the unobserved ones to produce forecasts. This imputation-free procedure avoids error introduced by imputation and preserves uncertainty aroused from missing features. In experiments, it improves forecast quality in terms of continuous ranked probability score relative to impute-then-predict baselines while incurring substantially lower computational cost than common alternatives. |
| title | Marginalize, Rather than Impute: Probabilistic Wind Power Forecasting with Incomplete Data |
| topic | Machine Learning Systems and Control |
| url | https://arxiv.org/abs/2403.03631 |