儲能裝置和可再生能源的組合，能夠有效對應可再生能源的間歇性特性，將多種能源利用單一或是多個轉換器進行連結，形成具有韌性的系統。然而，效率和元件數量之間存在著一個權衡，本文提出了一種新型的非隔離雙向三埠直流-直流轉換器，利用SEPIC具有兩個電感的特點，將其中一個電感替換為耦合電感並結合升壓電路的架構，達到高升壓的應用。
三埠轉換器結合兩種轉換器的架構，來減少使用的元件數量變相的縮減電路體積達到更高的功率密度。本文提出的架構用於PV埠-電池-DC電網系統，具有單輸入單輸出模式、雙輸入單輸出模式和單輸入雙輸出模式，其中單輸入單輸出模式中，具有DC電網至電池的模式，增加功率流的方向。本文中將會詳細介紹此轉換器的操作原理，穩態分析和轉換器的設計流程等，最後實際操作具有36 V的PV埠、48 V的電池埠和200 V的電壓輸出埠，功率為300 W的實驗電路。

The combination of energy storage devices and renewable energy can effectively address the intermittent nature of renewable energy sources. By connecting multiple energy sources using a single or multiple converters, a resilient system can be formed. However, there is a trade-off between efficiency and the number of components. This paper proposed a novel non-isolated bidirectional three-port DC-DC converter. Utilizing the SEPIC architecture with two inductors, one inductor is replaced with a coupled inductor and combined with a boost circuit, achieving high step-up applications.
The three-port converter integrates two converter architectures to minimize component usage, thereby reducing circuit size and increasing power density. The proposed architecture is used for a PV port-battery-DC grid system, featuring single-input single-output condition, dual-input single-output condition, and single-input dual-output condition. There is a condition for DC grid to battery, increasing the direction of power flow. This paper will detail the operating principles, steady-state analysis, and design process of the converter. Finally, a prototype circuit is implemented and tested with a 36 V PV port, a 48 V battery port, and a 200 V output port, and a power rating of 300 W.

[1] Q. Li and P. Wolfs, "A Review of the Single Phase Photovoltaic Module Integrated Converter Topologies With Three Different DC Link Configurations," in IEEE Transactions on Power Electronics, vol. 23, no. 3, pp. 1320-1333, May 2008.
[2] R. Rajesh and M. C. Mabel, "A comprehensive review of photovoltaic systems", Renewable Sustainable Energy Review, vol. 51, pp. 1364-321, Jun. 2015.
[3] Y. Zhu, H. Wen, G. Chu, Y. Hu, X. Li, and J. Ma, "High-Performance Photovoltaic Constant Power Generation Control with Rapid Maximum Power Point Estimation," in IEEE Transactions on Industry Applications, vol. 57, no. 1, pp. 714-729, Jan.-Feb. 2021.
[4] C. N. Truong, L. Viernstein, M. Schimpe, R. Witzmann, A. Jossen, and H. C. Hesse, "Maximizing Solar Home Battery Systems' Contribution to the Energy Transition of the Power System," NEIS 2017; Conference on Sustainable Energy Supply and Energy Storage Systems, Hamburg, Germany, 2017, pp. 1-8.
[5] A. K. Bhattacharjee, N. Kutkut, and I. Batarseh, "Review of Multiport Converters for Solar and Energy Storage Integration," in IEEE Transactions on Power Electronics, vol. 34, no. 2, pp. 1431-1445, Feb. 2019.
[6] P. Zhang, Y. Chen, and Y. Kang, "Non isolated Wide Operation Range Three-Port Converters With Variable Structures," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 5, no. 2, pp. 854-869, June 2017.
[7] Haimin Tao, J. L. Duarte, and M. A. M. Hendrix, "Multiport converters for hybrid power sources," 2008 IEEE Power Electronics Specialists Conference, Rhodes, Greece, 2008, pp. 3412-3418.
[8] A. Lavanya, J. D. Navamani, K. Vijayakumar, and R. Rakesh, "Multi-input DC-DC converter topologies-a review," 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), Chennai, India, 2016, pp. 2230-2233.
[9] M. C. Mira, Z. Zhang, A. Knott, and M. A. E. Andersen, "Analysis, Design, Modeling, and Control of an Interleaved-Boost Full-Bridge Three-Port Converter for Hybrid Renewable Energy Systems," in IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1138-1155, Feb. 2017.
[10] H. Wu, K. Sun, L. Zhu, and Y. Xing, "An Interleaved Half-Bridge Three-Port Converter With Enhanced Power Transfer Capability Using Three-Leg Rectifier for Renewable Energy Applications," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 4, no. 2, pp. 606-616, June 2016.
[11] H. Wu, R. Chen, J. Zhang, Y. Xing, H. Hu, and H. Ge, "A Family of Three-Port Half-Bridge Converters for a Stand-Alone Renewable Power System," in IEEE Transactions on Power Electronics, vol. 26, no. 9, pp. 2697-2706, Sept. 2011.
[12] H. Wu, Y. Jia, F. Yang, L. Zhu, and Y. Xing, "Two-Stage Isolated Bidirectional DC–AC Converters With Three-Port Converters and Two DC Buses," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 8, no. 4, pp. 4428-4439, Dec. 2020.
[13] T. Qian, K. Guo, and C. Qian, "A Combined Three-Port LLC Structure for Adaptive Power Flow Adjustment of PV Systems," in IEEE Transactions on Power Electronics, vol. 35, no. 10, pp. 10413-10422, Oct. 2020.
[14] H. Wu, J. Zhang, X. Qin, T. Mu, and Y. Xing, "Secondary-Side-Regulated Soft-Switching Full-Bridge Three-Port Converter Based on Bridgeless Boost Rectifier and Bidirectional Converter for Multiple Energy Interface," in IEEE Transactions on Power Electronics, vol. 31, no. 7, pp. 4847-4860, July 2016.
[15] V. N. S. R. Jakka, A. Shukla, and G. D. Demetriades, "Dual-Transformer-Based Asymmetrical Triple-Port Active Bridge (DT-ATAB) Isolated DC–DC Converter," in IEEE Transactions on Industrial Electronics, vol. 64, no. 6, pp. 4549-4560, June 2017.
[16] F. Alaql and I. Batarseh, "A Boost and LLC Resonant–based Three-port DC–DC Converter," 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Vancouver, BC, Canada, 2021, pp. 2118-2122.
[17] T. Qian, Y. Yang, and W. Zhao, "A Boost-Type Three-Port Resonant Forward Converter With Flexible Power Flow Path Optimization for PV Systems," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 70, no. 1, pp. 161-165, Jan. 2023.
[18] P. Wang, P. Ren, X. Lu, W. Wang, and D. Xu, "Topology Analysis and Power Sharing Control of a Two-Stage Three-Port Hybrid Energy Storage Converter for DC Microgrids," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 1, pp. 647-665, Feb. 2021.
[19] K. Wang, W. Liu, and F. Wu, "Topology-Level Power Decoupling Three-Port Isolated Current-Fed Resonant DC-DC Converter," in IEEE Transactions on Industrial Electronics, vol. 69, no. 5, pp. 4859-4868, May 2022.
[20] Y. Hu, W. Xiao, W. Cao, B. Ji, and D. J. Morrow, "Three-Port DC–DC Converter for Stand-Alone Photovoltaic Systems," in IEEE Transactions on Power Electronics, vol. 30, no. 6, pp. 3068-3076, June 2015.
[21] X. Tang, H. Wu, W. Hua, Z. Yu, and Y. Xing, "Three-Port Bidirectional Series-Resonant Converter with First-Harmonic-Synchronized PWM," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 2, pp. 1410-1419, April 2021.
[22] S. S. Dobakhshari, S. H. Fathi, and J. Milimonfared, "A New Soft-Switched Three-Port DC/DC Converter With High Voltage Gain and Reduced Number of Semiconductors for Hybrid Energy Applications," in IEEE Transactions on Power Electronics, vol. 35, no. 4, pp. 3590-3600, April 2020.
[23] M. I. Marei, B. N. Alajmi, I. Abdelsalam, and N. A. Ahmed, "An Integrated Topology of Three-Port DC-DC Converter for PV-Battery Power Systems," in IEEE Open Journal of the Industrial Electronics Society, vol. 3, pp. 409-419, 2022.
[24] R. Chattopadhyay and S. Bhattacharya, "Power flow control and ZVS analysis of three limb high frequency transformer based three-port DAB," 2016 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2016.
[25] N. D. Dao, D. C. Lee, and Q. D. Phan, "High-Efficiency SiC-Based Isolated Three-Port DC/DC Converters for Hybrid Charging Stations," in IEEE Transactions on Power Electronics, vol. 35, no. 10, pp. 10455-10465, Oct. 2020.
[26] R. Faraji, H. Farzanehfard, G. Kampitsis, M. Mattavelli, E. Matioli, and M. Esteki, "Fully Soft-Switched High Step-Up Non isolated Three-Port DC–DC Converter Using GaN HEMTs," in IEEE Transactions on Industrial Electronics, vol. 67, no. 10, pp. 8371-8380, Oct. 2020.
[27] Y. C. Liu and Y. -M. Chen, "A Systematic Approach to Synthesizing Multi-Input DC–DC Converters," in IEEE Transactions on Power Electronics, vol. 24, no. 1, pp. 116-127, Jan. 2009.
[28] H. Wu, K. Sun, S. Ding, and Y. Xing, "Topology Derivation of Non isolated Three-Port DC–DC Converters rom DIC and DOC," in IEEE Transactions on Power Electronics, vol. 28, no. 7, pp. 3297-3307, July 2013.
[29] P. C. Heris, Z. Saadatizadeh, and E. Babaei, "A New Two Input-Single Output High Voltage Gain Converter with Ripple-Free Input Currents and Reduced Voltage on Semiconductors," in IEEE Transactions on Power Electronics, vol. 34, no. 8, pp. 7693-7702, Aug. 2019.
[30] Z. Saadatizadeh, E. Babaei, F. Blaabjerg, and C. Cecati, "Three-Port High Step-Up and High Step-Down DC-DC Converter With Zero Input Current Ripple," in IEEE Transactions on Power Electronics, vol. 36, no. 2, pp. 1804-1813, Feb. 2021.
[31] T. -J. Liang, K. F. Liao, K. H. Chen, and S. -M. Chen, "Three-Port Converter With Single Coupled Inductor for High Step-Up Applications," in IEEE Transactions on Power Electronics, vol. 37, no. 8, pp. 9840-9849, Aug. 2022.
[32] P. Luo, L. Guo, J. Xu, and X. Li, "Analysis and Design of a New Non-Isolated Three-Port Converter with High Voltage Gain for Renewable Energy Applications," in IEEE Access, vol. 9, pp. 115909-115921, 2021.
[33] M. Uno and K. Sugiyama, "Switched Capacitor Converter Based Multiport Converter Integrating Bidirectional PWM and Series-Resonant Converters for Standalone Photovoltaic Systems," in IEEE Transactions on Power Electronics, vol. 34, no. 2, pp. 1394-1406, Feb. 2019.
[34] E. Meshkati and H. Farzanehfard, "Family Of High Step-Up Multi-Input Converters With Continuous Battery Current Based On Three Port Boost Topology and Switched Capacitors," 2023 14th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC), Babol, Iran, Islamic Republic of, 2023, pp. 1-7.
[35] M. Al-Soeidat, H. Khawaldeh, D. D. C. Lu, and J. Zhu, "A Novel High Step-up Three-Port Bidirectional DC/DC Converter for PV-Battery Integrated System," 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), New Orleans, LA, USA, 2020, pp. 3352-3357.
[36] T. Cheng, D. D. C. Lu, and L. Qin, "Non-Isolated Single-Inductor DC/DC Converter With Fully Reconfigurable Structure for Renewable Energy Applications," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 65, no. 3, pp. 351-355, March 2018.
[37] Z. Wang, Q. Luo, Y. Wei, D. Mou, X. Lu, and P. Sun, "Topology Analysis and Review of Three-Port DC–DC Converters," in IEEE Transactions on Power Electronics, vol. 35, no. 11, pp. 11783-11800, Nov. 2020.
[38] MICROMATALS, HF-184125-2, 2021, datasheet.
[39] Texas Instruments, Practical Magnetic Design: Inductors and Coupled Inductors, 2012, datasheet.