volume | PIER Journals

Abstract

Optical direct current (DC) transformer has become a hot spot of research with its high accuracy, wide bandwidth, and high voltage isolation characteristics, but has the technical difficulties of low signal-to-noise ratio of ODCT signal and poor temperature stability. For this reason, the study proposes a new type of optical DC transformer integrating material science and signal processing. The study introduces an improved terbium gallium garnet crystal sensing unit material and a signal processing algorithm with a plus-window dual correlation detection algorithm, and constructs an optical DC transformer model. Simulation results show that the temperature compensation method can effectively weaken the influence of temperature change on the measurement accuracy under both warming and cooling conditions, and higher accuracy can be obtained by using the whole period window for measurement. The system applying terbium gallium garnet crystals helps to enhance the measuring system's output signal-to-noise ratio and sensitivity. Terbium gallium garnet crystals as a sensing material can further decrease the measuring error compared with other magneto-optical glasses. Taken together, DC measurement system using terbium gallium garnet crystals and dual correlation detecting algorithm can control the error to about 0.3 s. Simulation experiments verify the validity and feasibility of the research methodology, which can guide the research and application of optical DC transformers in the future.

1. Cui, Shenghui, Joon-Hee Lee, Jingxin Hu, Rik W. De Doncker, and Seung-Ki Sul, "A modular multilevel converter with a zigzag transformer for bipolar MVDC distribution systems," IEEE Transactions on Power Electronics, Vol. 34, No. 2, 1038-1043, 2019.

2. Luo, Xinyu, Ju Tang, Cheng Pan, and Yongze Zhang, "Contribution of free iron particles to PD characteristics in flowing transformer oil at DC voltages," IET Generation, Transmission & Distribution, Vol. 14, No. 2, 294-300, 2020.

3. Durrani, Abdullah, Ammar Javaid, Seungwan Lee, and Jinyong Ha, "Optical rotary junction incorporating a hollow shaft DC motor for high-speed catheter-based optical coherence tomography," Optics Letters, Vol. 45, No. 2, 487-490, 2020.

4. Shi, Shuhuai, Fang Zhuo, Yanlin Zhu, Sheng Cheng, and Feng Wang, "Research on control strategy of MMC DC power electronic transformer based on DAB mode," IET Generation, Transmission & Distribution, Vol. 14, No. 21, 4694-4702, 2020.

5. Zhuo, Chaoran, Xiaotian Zhang, Xiong Zhang, and Xu Yang, "Research on fault current limitation and active control for power electronic transformer in direct current grid," IET Generation, Transmission & Distribution, Vol. 15, No. 1, 121-134, 2021.

6. Wang, Congbo, Ke Jia, Tianshu Bi, Zhenwen Xuan, and Rui Zhu, "Transient current curvature based protection for multi-terminal flexible DC distribution systems," IET Generation, Transmission & Distribution, Vol. 13, No. 15, 3484-3492, 2019.

7. Zhang, Weichi, Matthew Armstrong, and Mohammed Ali Elgendy, "Mitigation of DC current injection in transformer-less grid-connected inverters using a voltage filtering DC extraction approach," IEEE Transactions on Energy Conversion, Vol. 34, No. 1, 426-434, 2019.

8. Canturk, Sevket, Murat Erhan Balci, Mehmet Hakan Hocaoglu, and Ahmet Kerem Koseoglu, "Performance analysis of three-phase five-leg transformers under DC bias using a new frequency-dependent reluctance-based model," IET Generation, Transmission & Distribution, Vol. 16, No. 12, 2455-2465, 2022.

9. Lee, Hyeon-Seok, Bongkoo Kang, Wook-Sung Kim, and Sang-Jin Yoon, "Reduction of input voltage/current ripples of boost half-bridge DC-DC converter for photovoltaic micro-inverter," Solar Energy, Vol. 188, 1084-1101, Aug. 2019.

10. Achlerkar, Pankaj D. and Bijaya Ketan Panigrahi, "Assessment of DC offset in fault current signal for accurate phasor estimation considering current transformer response," IET Science, Measurement & Technology, Vol. 13, No. 3, 403-408, 2019.

11. Geng, Jianzhao, Rodney A. Badcock, and Chris W. Bumby, "A wireless rectifier for inductively energizing high direct-current high-temperature superconducting magnets," IEEE Transactions on Industrial Electronics, Vol. 68, No. 4, 3273-3281, 2021.

12. Belčević, Nenad M. and Zoran N. Stojanović, "Algorithm for phasor estimation during current transformer saturation and/or DC component presence: Definition and application in arc detection on overhead lines," IET Generation, Transmission & Distribution, Vol. 14, No. 7, 1378-1388, 2020.
doi:10.1049/iet-gtd.2019.0787

13. Li, Jinlong and Jinzhong Li, "Core form transformer topological duality based transient model validation for exciting current calculation within DC bias," IET Generation, Transmission & Distribution, Vol. 14, No. 15, 3099-3107, 2020.

14. Silva, Wibson W. G., Luana M. C. S. Hildever, Maria C. G. Santos, Francisco Estrada, and José Holanda, "Analyzing the magnetic influence on magneto-optical interactions," Journal of Superconductivity and Novel Magnetism, Vol. 36, No. 3, 951-955, 2023.

15. Royintarat, Tanitta, Phisit Seesuriyachan, Dheerawan Boonyawan, Eun Ha Choi, and Wassanai Wattanutchariya, "Mechanism and optimization of non-thermal plasma-activated water for bacterial inactivation by underwater plasma jet and delivery of reactive species underwater by cylindrical DBD plasma," Current Applied Physics, Vol. 19, No. 9, 1006-1014, 2019.

16. Miller, David C., Katherine E. Hurst, Archana Sinha, Jiadong Qian, Stephanie L. Moffitt, Soňa Uličná, Laura T. Schelhas, and Peter Hacke, "Quantifying optical loss of high-voltage degradation modes in photovoltaic modules using spectral analysis," Progress in Photovoltaics, Vol. 31, No. 8, 840-861, 2023.
doi:10.1002/pip.3690

17. Vidyasagar, R., O. Alves Santos, J. Holanda, R. O. Cunha, F. L. A. Machado, P. R. T. Ribeiro, A. R. Rodrigues, J. B. S. Mendes, A. Azevedo, and S. M. Rezende, "Giant zeeman shifts in the optical transitions of yttrium iron garnet thin films," Applied Physics Letters, Vol. 109, No. 12, 122402, 2016.

18. Tavsanoglu, T., E. O. Zayim, O. Agirseven, Saffettin Yildirim, and Onuralp Yucel, "Optical, electrical and microstructural properties of SiC thin films deposited by reactive DC magnetron sputtering," Thin Solid Films, Vol. 674, 1-6, Mar. 2019.

19. Hildever, Luana, Thiago Ferro, Adrielson Dias, André José, Francisco Estrada, and José Holanda, "Detecting magneto-optical interactions in nanostructures," ArXiv Preprint ArXiv:2401.03294, 2024.

20. Emami, Hojjat and Abbas Ali Sharifi, "A novel bio-inspired optimization algorithm for solving peak-to-average power ratio problem in DC-biased optical systems," Optical Fiber Technology, Vol. 60, 102383, Dec. 2020.

21. Lin, Chin-Wei, Jian-Ming Chen, You-Jun Lin, Ling-Wei Chao, Sin-Yi Wei, Chiu-Hsien Wu, Chien-Chung Jeng, Li-Min Wang, and Kuen-Lin Chen, "Magneto-optical characteristics of streptavidin-coated Fe3O4@Au core-shell nanoparticles for potential applications on biomedical assays," Scientific Reports, Vol. 9, No. 1, 16466, 2019.

22. Chen, Yuanxi, Weinong Fu, Hongjian Lin, and Shuangxia Niu, "A passive negative magnetic reluctance structure-based kHz transformer for improved DC magnetic bias withstanding," IEEE Transactions on Power Electronics, Vol. 38, No. 1, 717-727, 2023.

23. Sarsen, Adilkhan and Constantinos Valagiannopoulos, "Robust polarization twist by pairs of multilayers with tilted optical axes," Physical Review B, Vol. 99, No. 11, 115304, 2019.

24. Wellendorf, Axel, Patrick Tichelmann, and Joachim Uhl, "Performance analysis of a dynamic test bench based on a linear direct drive," Archives of Advanced Engineering Science, Vol. 1, No. 1, 55-62, 2023.
doi:10.47852/bonviewAAES3202902

Mr. Jinfeng Luo