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All Journal Jurnal Varidika Indonesian Journal of Electrical Engineering and Computer Science
Jie Yang
Unknown Affiliation
Education Languange, Linguistic, Communication & Media Mathematics Other

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Harmonic Analysis and Compensation Strategy for Grid-connected Inverter with LCL Filter Xiaowei Dong; Yize Sun; Yujie Chen; Jie Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 2: February 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In this paper, the harmonic components of grid-connected current are systemically and quantitatively analyzed, including the high-frequency harmonics caused by the modulation, and the low-frequency harmonics injected by the inherent non-linear characteristics and dead-time effects of switching tubes along with the DC voltage secondary pulsation and the grid disturbance. Furthermore, a combined control scheme of repetitive control and state feedback is brought forward, in which the feedforward decoupling for DC voltage and the feedforward compensation for grid voltage are added. The proposed control strategy can eliminate resonance peak of LCL filter, suppress and compensate the low-frequency harmonics, so that quick response and tracking without static error of the system can be realized. Finally, the rationality of the presented harmonic analysis and the validity of the presented combined control scheme are verified on the 3kW inverter experiment system.DOI : http://dx.doi.org/10.11591/telkomnika.v12i2.3578
Study on Chinese College Teachers’ Professional Beliefs and Ways to Improve Their Professional Beliefs Yang, Jie; Yao, Chunlin
Jurnal VARIDIKA Volume 35, No 1 June 2023
Publisher : Faculty of Teacher Training and Education, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/varidika.v1i1.21869

Abstract

Modern information technology has brought great benefits to education and challenged teachers’ professional beliefs. This study collects data about Chinese college teachers’ professional beliefs with the methods of questionnaire surveys and individual interviews. Based on 682 valid questionnaires, the study finds that Chinese college teachers’ professional beliefs are positive in general. Their research capabilities and their sense of research achievements are lower than their teaching abilities and their sense of teaching achievements. In addition, they expect to improve their information technology capabilities eagerly. Given research findings, this study proposes strategies to reconstruct the teachers’ professional beliefs, such as offering training and further education opportunities for college teachers, improving their research capabilities, intensifying the reform of colleges to establish a classified evaluation system, and providing information technology training for college teachers.
Study on Chinese College Teachers’ Professional Beliefs and Ways to Improve Their Professional Beliefs Yang, Jie; Yao, Chunlin
Jurnal VARIDIKA Volume 35, No 1 June 2023
Publisher : Faculty of Teacher Training and Education, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/varidika.v1i1.21869

Abstract

Modern information technology has brought great benefits to education and challenged teachers’ professional beliefs. This study collects data about Chinese college teachers’ professional beliefs with the methods of questionnaire surveys and individual interviews. Based on 682 valid questionnaires, the study finds that Chinese college teachers’ professional beliefs are positive in general. Their research capabilities and their sense of research achievements are lower than their teaching abilities and their sense of teaching achievements. In addition, they expect to improve their information technology capabilities eagerly. Given research findings, this study proposes strategies to reconstruct the teachers’ professional beliefs, such as offering training and further education opportunities for college teachers, improving their research capabilities, intensifying the reform of colleges to establish a classified evaluation system, and providing information technology training for college teachers.
Co-Authors Sheng, Dongping Su, Chun Xiaowei Dong Yao, Chunlin Yize Sun Yujie Chen