The Calculation Method of PV Direct Current Energy Based on Modulated Broadband Mode Decomposition and Compound Simpson Integral Algorithm
| Autor: | Bai Li, Yanfeng Peng, Yunfeng Liu, Kuanfang He, Zucheng Wang, Z. T. Wu |
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| Rok vydání: | 2021 |
| Předmět: |
photovoltaic direct current power measurement
General Computer Science Noise (signal processing) Computer science 020208 electrical & electronic engineering General Engineering 020206 networking & telecommunications 02 engineering and technology modulated difference operator Signal Harmonic analysis Narrowband Modulation Modulated broadband mode decomposition algorithm Broadband 0202 electrical engineering electronic engineering information engineering compound Simpson integral algorithm General Materials Science lcsh:Electrical engineering. Electronics. Nuclear engineering Wideband lcsh:TK1-9971 Algorithm Energy (signal processing) |
| Zdroj: | IEEE Access, Vol 9, Pp 51403-51415 (2021) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2021.3067728 |
| Popis: | The application of photovoltaic power is becoming more and more extensive presently, when the existing time-frequency analysis methods are used to analyze photovoltaic mutation signals such as transient rise and transient fall, the cornered signal will produce Gibbs phenomenon and leads to errors. Thus, the Broadband Mode Decomposition (BMD) method is proposed. The main idea of BMD is to search in the associated dictionary that contains the wideband and narrowband signals. However, the BMD algorithm may treat the wideband signal as several narrowband components, when applied to a wideband signal interfered by strong noise, because the relative bandwidth is not sufficiently small. Therefore, a modulated broadband modal decomposition (MBMD) based on the modulation differential operator is proposed. By multiplying a high-frequency single-frequency signal, the relative bandwidth of the effective wideband signal is much smaller than 1, and the wideband signal is processed as an approximate wideband signal. Meanwhile, because the errors of the traditional dot product sum algorithm in DC energy measurement cannot be positive and negative offset, while the compound Simpson integral algorithm has small error and high calculation accuracy. Therefore, a photovoltaic DC power calculation method based on the MBMD and compound Simpson integration is proposed. |
| Databáze: | OpenAIRE |
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