Virtual flux vector reconstruction of a PWM rectifier
The virtual flux space vector of a pulse width modulation (PWM) rectifier usually can be calculated by integrating the grid voltage vector. In practice, the pure integral part is replaced with a first-order low-pass filter (FOLP) to counteract the DC offset error and high frequency harmonic interfer...
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| Format: | Article |
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Science Press
2016-02-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.02.019 |
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| _version_ | 1850282906608467968 |
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| author | CHEN Tie-zhu ZHANG Yong-jun XIAO Xiong LUO Ling-bo |
| author_facet | CHEN Tie-zhu ZHANG Yong-jun XIAO Xiong LUO Ling-bo |
| author_sort | CHEN Tie-zhu |
| collection | DOAJ |
| description | The virtual flux space vector of a pulse width modulation (PWM) rectifier usually can be calculated by integrating the grid voltage vector. In practice, the pure integral part is replaced with a first-order low-pass filter (FOLP) to counteract the DC offset error and high frequency harmonic interference. However, the FOLP will result in the amplitude variation and phase shift of the grid voltage vector, which can lead to inaccurate observations of the virtual flux. In order to eliminate the effect of the FOLP on the grid voltage, this paper proposes an improved virtual flux orientation strategy based on the vector reconstruction principle. According to the amplitude-frequency characteristics and phase-frequency characteristics of the FLOP, the amplitude and phase of the voltage vector were separately reconstructed to improve the accuracy of the amplitude and phase values in virtual flux estimation. Furthermore, the proposed method was applied to a virtual flux oriented PWM rectifier direct power control system. Simulations and experimental results show that, compared with the traditional first-order low-pass filter, this method improves the accuracy of virtual flux estimation, effectively reduces the DC bus vohage fluctuation in dynamic response, and is more conducive to filter out grid current harmonics control. |
| format | Article |
| id | doaj-art-e6f8d5dfca22413c869c1e0eb54a8dae |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2016-02-01 |
| publisher | Science Press |
| record_format | Article |
| series | 工程科学学报 |
| spelling | doaj-art-e6f8d5dfca22413c869c1e0eb54a8dae2025-08-20T01:47:51ZzhoScience Press工程科学学报2095-93892016-02-0138228329010.13374/j.issn2095-9389.2016.02.019Virtual flux vector reconstruction of a PWM rectifierCHEN Tie-zhu0ZHANG Yong-jun1XIAO Xiong2LUO Ling-bo31. Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China;1. Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China;1. Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China;2. CRRC Zhuzhou Institute Co., Ltd., Zhuzhou 412001, ChinaThe virtual flux space vector of a pulse width modulation (PWM) rectifier usually can be calculated by integrating the grid voltage vector. In practice, the pure integral part is replaced with a first-order low-pass filter (FOLP) to counteract the DC offset error and high frequency harmonic interference. However, the FOLP will result in the amplitude variation and phase shift of the grid voltage vector, which can lead to inaccurate observations of the virtual flux. In order to eliminate the effect of the FOLP on the grid voltage, this paper proposes an improved virtual flux orientation strategy based on the vector reconstruction principle. According to the amplitude-frequency characteristics and phase-frequency characteristics of the FLOP, the amplitude and phase of the voltage vector were separately reconstructed to improve the accuracy of the amplitude and phase values in virtual flux estimation. Furthermore, the proposed method was applied to a virtual flux oriented PWM rectifier direct power control system. Simulations and experimental results show that, compared with the traditional first-order low-pass filter, this method improves the accuracy of virtual flux estimation, effectively reduces the DC bus vohage fluctuation in dynamic response, and is more conducive to filter out grid current harmonics control.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.02.019pulse width modulationrectifiersvector reconstructionpower control |
| spellingShingle | CHEN Tie-zhu ZHANG Yong-jun XIAO Xiong LUO Ling-bo Virtual flux vector reconstruction of a PWM rectifier 工程科学学报 pulse width modulation rectifiers vector reconstruction power control |
| title | Virtual flux vector reconstruction of a PWM rectifier |
| title_full | Virtual flux vector reconstruction of a PWM rectifier |
| title_fullStr | Virtual flux vector reconstruction of a PWM rectifier |
| title_full_unstemmed | Virtual flux vector reconstruction of a PWM rectifier |
| title_short | Virtual flux vector reconstruction of a PWM rectifier |
| title_sort | virtual flux vector reconstruction of a pwm rectifier |
| topic | pulse width modulation rectifiers vector reconstruction power control |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.02.019 |
| work_keys_str_mv | AT chentiezhu virtualfluxvectorreconstructionofapwmrectifier AT zhangyongjun virtualfluxvectorreconstructionofapwmrectifier AT xiaoxiong virtualfluxvectorreconstructionofapwmrectifier AT luolingbo virtualfluxvectorreconstructionofapwmrectifier |