A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems
Hydro-wind system output fluctuations are the primary factors used to assess the effects of hydropower on power companies compensating for wind power intermittency. Considering that most fluctuation indices can only characterize one aspect of fluctuations, namely, the quantitative or contour variati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-02-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/9/2/114 |
| _version_ | 1811185016637489152 |
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| author | Xianxun Wang Yadong Mei Hao Cai Xiangyu Cong |
| author_facet | Xianxun Wang Yadong Mei Hao Cai Xiangyu Cong |
| author_sort | Xianxun Wang |
| collection | DOAJ |
| description | Hydro-wind system output fluctuations are the primary factors used to assess the effects of hydropower on power companies compensating for wind power intermittency. Considering that most fluctuation indices can only characterize one aspect of fluctuations, namely, the quantitative or contour variations, we present a new index that uses the standard deviation (SD) and rotation angle to detect the quantitative variations and contour changes, respectively. Herein, the new index is compared with commonly used indices, specifically, the first-order difference, SD, and Richards-Baker flashiness indices. The results of tests performed using various processes and disposals show that: (1) when dealing with the process by moving average, repeating or overlay disposal, the new index performs comparably to the other indices, while when dealing with the process by zooming disposal, it more fully describes the fluctuation characteristics by taking both quantitative and contour variations into consideration; (2) when the new index is used to characterize the hydro-wind output fluctuations with different resources and capacities, the outcomes coincide with the mechanisms of hydro-wind systems. This study presents a new way to characterize the fluctuation of hydro-wind output. |
| first_indexed | 2024-04-11T13:23:17Z |
| format | Article |
| id | doaj.art-33d9adeb5f64485980d609ce6d3c0b0f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T13:23:17Z |
| publishDate | 2016-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-33d9adeb5f64485980d609ce6d3c0b0f2022-12-22T04:22:09ZengMDPI AGEnergies1996-10732016-02-019211410.3390/en9020114en9020114A New Fluctuation Index: Characteristics and Application to Hydro-Wind SystemsXianxun Wang0Yadong Mei1Hao Cai2Xiangyu Cong3State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, ChinaState Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, ChinaState Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, ChinaPOWERCHINA Kunming Engineering Corporation Limited, Kunming 650051, Yunnan, ChinaHydro-wind system output fluctuations are the primary factors used to assess the effects of hydropower on power companies compensating for wind power intermittency. Considering that most fluctuation indices can only characterize one aspect of fluctuations, namely, the quantitative or contour variations, we present a new index that uses the standard deviation (SD) and rotation angle to detect the quantitative variations and contour changes, respectively. Herein, the new index is compared with commonly used indices, specifically, the first-order difference, SD, and Richards-Baker flashiness indices. The results of tests performed using various processes and disposals show that: (1) when dealing with the process by moving average, repeating or overlay disposal, the new index performs comparably to the other indices, while when dealing with the process by zooming disposal, it more fully describes the fluctuation characteristics by taking both quantitative and contour variations into consideration; (2) when the new index is used to characterize the hydro-wind output fluctuations with different resources and capacities, the outcomes coincide with the mechanisms of hydro-wind systems. This study presents a new way to characterize the fluctuation of hydro-wind output.http://www.mdpi.com/1996-1073/9/2/114fluctuation characterizationhydro-wind outputstandard deviationrotation angle |
| spellingShingle | Xianxun Wang Yadong Mei Hao Cai Xiangyu Cong A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems Energies fluctuation characterization hydro-wind output standard deviation rotation angle |
| title | A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems |
| title_full | A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems |
| title_fullStr | A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems |
| title_full_unstemmed | A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems |
| title_short | A New Fluctuation Index: Characteristics and Application to Hydro-Wind Systems |
| title_sort | new fluctuation index characteristics and application to hydro wind systems |
| topic | fluctuation characterization hydro-wind output standard deviation rotation angle |
| url | http://www.mdpi.com/1996-1073/9/2/114 |
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