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| Control Strategy of Three-Port Bidirectional DC-DC Converter Based on Reactive Power Optimization |
| Huang Jun1,2, Fu Yanan1,2, Lü Xiaofei3, He Xuguo1,2, Huo Pengchong1,2 |
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China;
2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin 300130 China;
3. NARI Technology Co. Ltd Nanjing 211106 China |
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Abstract The three-port bidirectional DC-DC converter (TP BDC) suffers high reactive power, narrow soft switching range, and low efficiency when the port voltages do not match. Thus, this paper proposes a control strategy for the efficiency optimization of TP BDC, which aims to minimize the reactive power. The voltage and current characteristics of each port are analyzed. On this basis, the power model of each port is established with the duty cycle control and phasor analysis. By constructing and solving the minimum reactive power optimization problem, the reactive power of TP BDC is reduced in a wide voltage range. Furthermore, this paper analyzes the soft switching characteristics of TP BDC under the optimal control. The selection strategy of optimal control parameters is subsequently proposed. The experimental results show that TP BDC has lower reactive power and wider soft switching range under wide voltage conditions by applying the proposed optimal control strategy. Consequently, the transmission efficiency of the converter is significantly improved under port voltage mismatch and light load conditions.
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Received: 02 April 2021
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[1] Sheikh Jakir Hossain, Biswajit Dipan Biswas, Rojan Bhattarai, et al.Operational value-based energy storage management for photovoltaic (PV) integrated active power distribution system[J]. IEEE Transa- ctions on Industry Applications, 2019, 55(5): 5320-5330.
[2] Poh Chiang Loh, Ding Li, Yi Kang Chai, et al.Autonomous operation of hybrid microgrid with AC and DC subgrids[J]. IEEE Transactions on Power Electronics, 2013, 28(5): 2214-2223.
[3] 朱晓荣, 孟凡奇, 谢志云. 基于虚拟同步发电机的直流微DC-DC变换器控制策略[J]. 电力系统自动化, 2019, 43(21): 132-140.
Zhu Xiaorong, Meng Fanqi, Xie Zhiyun.Control strategy of DC-DC converter in DC microgrid based on virtual synchronous generator[J]. Automatic of Electric Power Systems, 2019, 43(21): 132-140.
[4] 刘计龙, 朱志超, 肖飞, 等. 一种面向舰船综合电力系统的模块化三端口直流变换器[J]. 电工技术学报, 2020, 35(19): 4085-4096.
Liu Jilong, Zhu Zhichao, Xiao Fei, et al.A modular three-port DC-DC converter for vessel integrated power system[J]. Transactions of China Electro- technical Society, 2020, 35(19): 4085-4096.
[5] 陈强, 李睿, 蔡旭. 链式储能系统电池侧二次脉动功率的抑制方法[J]. 电工技术学报, 2015, 30(8): 231-237.
Chen Qiang, Li Rui, Cai Xu.Method of second-order ripple power suppression for battery in cascaded H-bridge storage system[J]. Transactions of China Electrotechnical Society, 2015, 30(8): 231-237.
[6] 李建林, 徐少华, 惠东. 百MW级储能电站用PCS多机并联稳定性分析及其控制策略综述[J]. 中国电机工程学报, 2016, 36(15): 4034-4047.
Li Jianlin, Xu Shaohua, Hui Dong.A review of stability analysis and control strategy of multi-parallel PCS for hundred MW level energy storage power station[J]. Proceedings of the CSEE, 2016, 36(15): 4034-4047.
[7] 张辉, 梁誉馨, 孙凯, 等. 直流微电网中多端口隔离型DC-DC变换器的改进虚拟电容控制策略[J]. 电工技术学报, 2021, 36(2): 292-304.
Zhang Hui, Liang Yuxin, Sun Kai, et al.Improved virtual capacitor control strategy of multi-port isolated DC-DC converter in DC microgrid[J]. Transactions of China Electrotechnical Society, 2021, 36(2): 292-304.
[8] Zhao Biao, Song Qiang, Liu Wenhua, et al.Overview of dual-active-bridge isolated bidirectional DC-DC converter for high-frequency-link power-conversion system[J]. IEEE Transactions on Power Electronics, 2014, 29(8): 4091-4106.
[9] Zhang Junjun, Wu Hongfei, Qin Xiaoqing, et al.PWM plus secondary-side phase-shift controlled soft- switching full-bridge three-port converter for rene- wable power systems[J]. IEEE Transactions on Industrial Electronics, 2015, 62(11): 7061-7072.
[10] 余雪萍, 涂春鸣, 肖凡, 等. 三端口隔离DC-DC变换器软开关特性研究[J]. 电工技术学报, 2021, 36(23): 5014-5026.
Yu Xueping, Tu Chunming, Xiao Fan, et al.Soft switching characteristics of the three-port isolated DC-DC converter[J]. Transactions of China Electro- technical Society, 2021, 36(23): 5014-5026.
[11] Zhao Lei, Li Haoyu, Hou Yue, et al.Operation analysis of a phase-shifted full-bridge converter during the dead-time inverval[J]. IET Power Electro- nics, 2016, 9(9): 1777-1783.
[12] 周兵凯, 杨晓峰, 张智, 等. 能量路由器中双有源桥直流变换器多目标优化控制策略[J]. 电工技术学报, 2020, 35(14): 3030-3040.
Zhou Bingkai, Yang Xiaofeng, Zhang Zhi, et al.Multi-objective optimization control strategy of dual- active-bridge DC-DC converter in electric energy router application[J]. Transactions of China Electro- technical Society, 2020, 35(14): 3030-3040.
[13] 李微, 王议锋, 韩富强, 等.一种隔离型三端口双向LCLC多谐振直流变换器[J]. 电工技术学报, 2018, 33(14): 3231-3244.
Li Wei, Wang Yifeng, Han Fuqiang, et al.An isolated three-port bidirectional LCLC multi-resonant DC-DC converter[J]. Transactions of China Electrotechnical Society, 2018, 33(14): 3231-3244.
[14] 王萍, 陈博, 王议锋, 等.一种多谐振隔离双向DC-DC变换器[J]. 电工技术学报, 2019, 34(8): 1667-1676.
Wang Ping, Chen Bo, Wang Yifeng, et al.A multi resonant bidirectional DC-DC converter[J]. Transa- ctions of China Electrotechnical Society, 2019, 34(8): 1667-1676.
[15] Ngoc Dat Dao, Dong-Choon Lee, Quoc Dung Phan.High-efficiency SiC-based isolated three-port DC/DC converter for hybrid charging stations[J]. IEEE Transactions on Power Electronics, 2020, 35(10): 10455-10465.
[16] 沙广林, 王聪, 程红, 等. 移相控制的双有源桥DC-DC变换器统一相量分析法[J]. 电工技术学报, 2017, 32(18): 175-185.
Sha Guanglin, Wang Cong, Cheng Hong, et al.Unified phasor analytical method for bidirectional dual-active-bridge DC-DC converter under phase- shift control[J]. Transactions of China Electro- technical Society, 2017, 32(18): 175-185.
[17] Zhao Biao, Song Qiang, Liu Wenhua, et al.Universal high-frequency-link characterization and practical fundamental-optimal strategy for dual-active-bridge DC-DC converter under PWM plus phase-shift control[J]. IEEE Transactions on Power Electronics, 2015, 30(12): 6488-6494.
[18] 李广地, 阮杰, 王昆, 等. 一种混合调制型三路输出DC-DC变换器[J]. 电工技术学报, 2019, 34(22): 4719-4727.
Li Guangdi, Ruan Jie, Wang Kun, et al.A hybrid modulated triple-output DC-DC converter[J]. Transa- ctions of China Electrotechnical Society, 2019, 34(22): 4719-4727.
[19] 杨玉岗, 赵金升. 高增益对称双向LCLC谐振变换器的研究[J]. 电工技术学报, 2020, 35(14): 3007-3017.
Yang Yugang, Zhao Jinsheng.Research on high-gain symmetric bidirectional LCLC resonant converter[J]. Transactions of China Electrotechnical Society, 2020, 35(14): 3007-3017. |
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2022, Vol. 37 
