为解决多个变换器引起的能量损耗问题,提出一种三端口LLC谐振型结构的变换器,可实现同时向负载端和储能端供能。建立基波近似（FHA）模型,分析变换器的增益特性。传统的脉冲宽度调制（PWM）策略无法实现宽范围零电压开关（ZVS）技术,现有的脉冲频率调制（PFM）控制策略需要复杂的建模过程。研究中设计了改进的PWM-PFM混合调制方法。在该控制策略下变换器可在宽输入电压范围内实现稳压输出和软开关技术。最后,建立330~400 V输入、48 V/288 W输出的仿真模型,验证了研究与分析的正确性。
Abstract
The energy transmission of DC micro-grid needs cascaded converters. In order to solve the problem of energy loss caused by multiple converters, a three-port LLC resonant converter is proposed. The converter can supply energy to the load side and the energy storage side at the same time. The fundamental harmonic approach （FHA） is used to establish the model of the converter. The gain characteristics of the converter is analyzed. Traditional pulse width modulation can not realize wide range of zero voltage switching technology. The existing pulse frequency modulation control strategy needs complex modeling process. An improved PWM-PFM hybrid control strategy is proposed. The converter can realize the output voltage regulation and zero voltage switching in a wide input voltage range. Finally, the simulation model of 330-400 V input and 48 V/288 W output is established to illustrate the correctness of the research and analysis.
关键词
ZVS /
LLC谐振 /
变换器 /
宽范围 /
PWM-PFM混合控制 /
三端口
Key words
ZVS /
LLC resonance /
converter /
wide range /
PWM-PFM hybrid control /
three ports
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 曹靖, 许建平, 陈一鸣, 等. PWM-PFM混合控制LCC谐振变换器研究[J]. 中国电机工程学报, 2018, 38(12): 3629-3637, 23.
CAO J, XU J P, CHEN Y M, et al.Study of PWM-PFM hybrid controlled LCC resonant converter[J]. Proceedings of the CSEE, 2018, 38(12): 3629-3637, 23.
[2] 余吕斌. 谐振半桥变换器的研究[D]. 重庆: 重庆大学, 2007.
YU L B.Research on resonant half bridge converter[D]. Chongqing: Chongqing University, 2007.
[3] IBANEZ F M, ECHEVERRIA J M, VADILLO J, et al.A step-up bidirectional series resonant DC/DC converter using a continuous current mode[J]. IEEE transactions on power electronics, 2015, 30(3): 1393-1402.
[4] CHEN G, LEE Y S, HUI S Y R, et al. Actively clamped bidirectional flyback converter[J]. IEEE transactions on industrial electronics, 2000, 47(4): 770-779.
[5] CHUNG S H, CHEUNG W L, TANG K S.A ZCS bidirectional flyback DC/DC converter[J]. IEEE transactions on power electronics, 2004, 19(6): 1426-1434.
[6] HUANG L, ZHANG Z, ANDERSEN M, et al.High voltage bidirectional flyback converter driving DEAP actuator for automotive applications[C]//IEEE Vehicle Power and Propulsion Conference, Beijing, China, 2013: 1938-8756.
[7] 陆治国, 祝万平, 刘捷丰, 等. 一种新型交错并联双向DC/DC变换器[J]. 中国电机工程学报, 2013, 33(12): 39-46, 184.
LU Z G, ZHU W P, LIU J F, et al.A novel interleaved parallel bidirectional DC/DC converter[J]. Proceedings of the CSEE, 2013, 33(12): 39-46, 184.
[8] DENG J Y, WANG H Y, SHANG M.A ZVS three-port DC/DC converter for high-voltage bus-based photo-voltaic systems[J]. IEEE transactions on power electronics, 2019, 34(11): 10688-10699.
[9] SOEIDAT M, KHAWALDEH H, ALJARAJREH H, et al.A compact three-port DC-DC converter for integrated PV-battery system[C]//2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) Shenzhen, China, 2018: 1-6.
[10] 耿福山, 黄有为, 季纲. 高频开关电源变压器的优化设计分析[J]. 电源技术应用, 2014(2): 109-115.
GENG F S, HUANG Y W, JI G.Optimal design and analysis of high frequency switching power supply transformer[J]. Application of power supply technology, 2014(2): 109-115.
[11] YOUSSEF M Z, PINHEIRO H, JAIN P K.Self-sustained phase-shift modulated resonant converters: modeling, design, and performance[J]. IEEE transactions on power electronics, 2006, 21(2): 401-414.
[12] PINHEIRO H, JAIN P K, JOOS G.Self-sustained oscillating resonant converters operating above the resonant frequency[J]. IEEE transactions on power electronics, 1999, 14(5): 803-815.
[13] PINHEIRO H, JAIN P, JOOS G.Series-parallel resonant converter in the self-sustained oscillating mode for unity power factor applications[C]//Proceedings of the 12th applied Power Electronics Conference and Exposition, Atlanta, GA, USA, 1997: 477-483.
[14] SOSA J L, CASTILLA M, MIRET J, et al.Modeling and performance analysis of the DC/DC series-parallel resonant converter operating with discrete self-sustained phase-shift modulation technique[J]. IEEE transactions on industrial electronics, 2009, 56(3): 697-705.
[15] DA SILVEIRA CAVALCANTE F, KOLAR J W. Design of a 5 kW high output voltage series-parallel resonant DC-DC converter[C]//Proceedings of the 34th Annual Power Electronics Specialist Conference, Acapulco, Mexico:IEEE, 2003: 1807-1814.
基金
国家自然科学基金（61803154）; 河北省自然科学基金（F2019209553）
PDF(2213 KB)
