1 kVA高性能单相中频逆变电源的研制
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摘要
针对低压直流输入/中频400 Hz/115 V交流输出的高功率密度航空变流器的应用需求,提出了两级电路拓扑结构,其前级采用并-串型移相全桥结构实现隔离和升压的功能,后级采用全桥电路实现逆变功能。同时,为减小单相逆变器直流侧的二次纹波电流对前级的影响,前级单模块采用加入陷波器的负载电流前馈控制策略。为了进一步提高前级并-串型DC-DC变换器的动态性能,还提出了一种主从控制的均压控制策略;为了提高后级逆变电路的动态性能和负载调整率,提出一种改进的前馈控制策略。仿真和实验均验证了上述两级结构逆变电源控制策略的可行性。
A two-stage circuit topology was proposed in this paper to meet the application demands for a high power density converter used in the field of aerospace, which was with low voltage DC input, middle-frequency of 400 Hz, and 115 V AC output. The pre-stage adopted an input parallel and output series(IPOS) phase shifted full-bridge structure to realize isolation and voltage boost, while the post-stage selected the full-bridge circuit to realize the inverter function. Meanwhile, to suppress the effect on the pre-stage due to the secondary ripple current on the DC side of the single-phase inverter, the pre-stage module adopted a load current feedforward control strategy with wave trap; to further improve the dynamic response of the pre-stage IPOS DC-DC converter, a voltage balancing control strategy under masterslave control was also proposed. Moreover, an improved feedforward control strategy was proposed to improve the dynamic performance and load regulation rate of the post-stage inverter circuit. Finally, the validity of the two-stage inverter control strategy was verified by simulation and experimental results.
A two-stage circuit topology was proposed in this paper to meet the application demands for a high power density converter used in the field of aerospace, which was with low voltage DC input, middle-frequency of 400 Hz, and 115 V AC output. The pre-stage adopted an input parallel and output series(IPOS) phase shifted full-bridge structure to realize isolation and voltage boost, while the post-stage selected the full-bridge circuit to realize the inverter function. Meanwhile, to suppress the effect on the pre-stage due to the secondary ripple current on the DC side of the single-phase inverter, the pre-stage module adopted a load current feedforward control strategy with wave trap; to further improve the dynamic response of the pre-stage IPOS DC-DC converter, a voltage balancing control strategy under masterslave control was also proposed. Moreover, an improved feedforward control strategy was proposed to improve the dynamic performance and load regulation rate of the post-stage inverter circuit. Finally, the validity of the two-stage inverter control strategy was verified by simulation and experimental results.
引文
[1]胡文华.大容量400 Hz中频逆变电源波形质量控制技术研究[D].武汉:华中科技大学,2010.Hu Wenhua.Research on waveform quality control technology of high power 400 Hz inverter[D].Wuhan:Huazhong U-niversity of Science and Technology,2010(in Chinese).
[2]蔡环宇.高功率密度DC-AC变流器并联系统研究[D].杭州:浙江大学,2016.Cai Huanyu.Research on high power density DC-AC converter and its parallel control[D].Hangzhou:Zhejiang University,2016(in Chinese).
[3]Giri R,Ayyanar R,Ledezma E.Input-series and outputseries connected modular DC-DC converters with active input voltage and output voltage sharing[C].Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition(APEC),2004.Anaheim,CA,USA,2004,3:1751-1756.
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[7]杨苓,罗安,陈燕东,等.直流微网双向储能变换器的两带通滤波器二次纹波电流抑制与均分控制方法[J].中国电机工程学报,2016,36(6):1613-1624.Yang Ling,Luo An,Chen Yandong,et al.The Second harmonic current suppressed by two band-pass filters and current sharing control method of Bi-directional energy storage converters in DC micro-grid[J].Proceedings of the CSEE,2016,36(6):1613-1624(in Chinese).
[8]曾正,邵伟华,宋春伟,等.电压源逆变器典型控制方法的电路本质分析[J].中国电机工程学报,2016,36(18):4980-4989.Zeng Zheng,Shao Weihua,Song Chunwei,et al.Circuitbased analysis of typical control schemes of voltage-source inverter[J].Proceedings of the CSEE,2016,36(18):4980-4989(in Chinese).
[9]Rymarski Z,Bernacki K.Different approaches to modelling single-phase voltage source inverters for uninterruptible power supply system[J].IEEE Transactions on IET Power Electronics,2016,9(7):1513-1520.
[10]王文杰,龙江涛,石健将.基于PR控制和平均功率控制的中频逆变器并联系统研究[J].电源学报,2013,11(3):5-12.Wang Wenjie,Long Jiangtao,Shi Jianjiang.Research on paralleled middle-frequency inverters system based on PRand average power control strategies[J].Journal of Power Supply,2013,11(3):5-12(in Chinese).
[11]龙江涛,蔡环宇,何昕东,等.基于平均功率控制的中频逆变器主从并联系统研究[J].电源学报,2015,13(2):1-9.Long Jiangtao,Cai Huanyu,He Xindong,et al.Research on master-slave paralleled middle-frequency inverters’system based on average power control strategies[J].Journal of Power Supply,2015,13(2):1-9(in Chinese).
[2]蔡环宇.高功率密度DC-AC变流器并联系统研究[D].杭州:浙江大学,2016.Cai Huanyu.Research on high power density DC-AC converter and its parallel control[D].Hangzhou:Zhejiang University,2016(in Chinese).
[3]Giri R,Ayyanar R,Ledezma E.Input-series and outputseries connected modular DC-DC converters with active input voltage and output voltage sharing[C].Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition(APEC),2004.Anaheim,CA,USA,2004,3:1751-1756.
[4]张容荣,阮新波,陈武.输入并联输出串联变换器系统的控制策略[J].电工技术学报,2008,23(8):86-93.Zhang Rongrong,Ruan Xinbo,Chen Wu.Control strategy for input-parallel output-series converter system[J].Transactions of China Electrotechnical Society,2008,23(8):86-93(in Chinese).
[5]Itoh J,Hayashi F.Ripple current reduction of a fuel cell for a single-phase isolated converter using a DC active filter with a center tap[J].IEEE Transactions on Power Electronics,2010,25(3):550-556.
[6]祝国平,阮新波,王学华,等.两级式单相逆变器二次纹波电流的抑制与动态特性的改善[J].中国电机工程学报,2013,33(12):72-80.Zhu Guoping,Ruan Xinbo,Wang Xuehua,et al.Suppression of the second harmonic current and improvement of the dynamic performance for two-stage single-phase inverters[J].Proceedings of the CSEE,2013,33(12):72-80(in Chinese).
[7]杨苓,罗安,陈燕东,等.直流微网双向储能变换器的两带通滤波器二次纹波电流抑制与均分控制方法[J].中国电机工程学报,2016,36(6):1613-1624.Yang Ling,Luo An,Chen Yandong,et al.The Second harmonic current suppressed by two band-pass filters and current sharing control method of Bi-directional energy storage converters in DC micro-grid[J].Proceedings of the CSEE,2016,36(6):1613-1624(in Chinese).
[8]曾正,邵伟华,宋春伟,等.电压源逆变器典型控制方法的电路本质分析[J].中国电机工程学报,2016,36(18):4980-4989.Zeng Zheng,Shao Weihua,Song Chunwei,et al.Circuitbased analysis of typical control schemes of voltage-source inverter[J].Proceedings of the CSEE,2016,36(18):4980-4989(in Chinese).
[9]Rymarski Z,Bernacki K.Different approaches to modelling single-phase voltage source inverters for uninterruptible power supply system[J].IEEE Transactions on IET Power Electronics,2016,9(7):1513-1520.
[10]王文杰,龙江涛,石健将.基于PR控制和平均功率控制的中频逆变器并联系统研究[J].电源学报,2013,11(3):5-12.Wang Wenjie,Long Jiangtao,Shi Jianjiang.Research on paralleled middle-frequency inverters system based on PRand average power control strategies[J].Journal of Power Supply,2013,11(3):5-12(in Chinese).
[11]龙江涛,蔡环宇,何昕东,等.基于平均功率控制的中频逆变器主从并联系统研究[J].电源学报,2015,13(2):1-9.Long Jiangtao,Cai Huanyu,He Xindong,et al.Research on master-slave paralleled middle-frequency inverters’system based on average power control strategies[J].Journal of Power Supply,2015,13(2):1-9(in Chinese).