Anovel online monitoring method of three-phase voltage unbalance factor with Butterworth-based improved SOGI
发布时间：2024-11-19
点击次数：
DOI码：10.1007/s00202-024-02856-0
发表刊物：Electrical Engineering
关键字：Three-phase voltage unbalance factor · Butterworth-based improved second-order generalized integrator · Instantaneous symmetric components · Phase-locked loop
摘要：Since the three-phase voltage unbalance factor is a crucial index for assessing power quality, real-time monitoring of the three-phase voltage unbalance is crucial for ensuring the safety of the power grid. In order to realize the online monitoring of three-phase voltage unbalance, the second-order generalized integrator (SOGI) is used to generate quadrature signals at the fundamental frequency. Addressing the issue that the SOGI cannot effectively filter harmonics and DC components, a Butterworth-based improved second-order generalized integrator (BISOGI) is first proposed in this paper. Subsequently, to achieve real-time measurement of the three-phase voltage unbalance factor in a three-phase four-wire low-voltage distribution network, a BISOGI-based improvement method is presented and the detailed signal processing process is analyzed. Finally, an experimental platform is constructed to verify the proposed model under the influence of harmonics and DC offset. The experimental results indicate that the new method not only filters out harmonics and DC components but also achieves high accuracy that complies with the standards set by GB/T 15543-2008 and IEC61000-4-27, with a real-time response speed under any conditions.
论文类型：期刊论文
学科门类：工学
文献类型：J
是否译文：否
发表时间：2024-11-18
收录刊物：SCI
附件：