| 适用于光伏发电系统的混合级联式逆变器 |
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| 引用本文： | 陆晓楠,孙凯,马毅为,黄立培.适用于光伏发电系统的混合级联式逆变器[J].清华大学学报(自然科学版),2011(3):351-355. |
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| 作者姓名： | 陆晓楠 孙凯 马毅为 黄立培 |
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| 作者单位： | 清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室; |
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| 基金项目： | 清华大学电力系统及发电设备控制和仿真国家重点实验室自主课题(SKLD09M15); 中国电机工程学会电力青年科技创新资助项目 |
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| 摘 要： | 为了适应光伏发电系统中对于高效率逆变器的需要,提出了一种基于MOSFET和IGBT的改进型单相混合级联式逆变器,其由3个H桥逆变器输出串联组成,直流侧相互独立,电压取值满足1:2:4的关系.其中,高压H桥和中压H桥由IGBT构成,而低压H桥由MOSFET构成.上述混合级联式逆变器结构可以在较低的开关频率下实现交流侧多电...
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| 关 键 词： | 混合级联式逆变器 调制策略 效率 光伏发电 |
Hybrid cascaded inverter for photovoltaic generation systems |
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| LU Xiaonan,SUN Kai,MA Yiwei,HUANG Lipei.Hybrid cascaded inverter for photovoltaic generation systems[J].Journal of Tsinghua University(Science and Technology),2011(3):351-355. |
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| Authors: | LU Xiaonan SUN Kai MA Yiwei HUANG Lipei |
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| Institution: | LU Xiaonan,SUN Kai,MA Yiwei,HUANG Lipei(State Key Laboratory of Control and Simulation of Power System and Generation Equipments,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | An improved single-phase hybrid cascaded inverter was developed using MOSFET/IGBT to give a high converting efficiency for photovoltaic(PV) generation systems.The inverter has three H-bridges,with series-connected AC sides and isolated DC sides.The DC voltages are in the ratio of 1∶2∶4.The high voltage and middle voltage H-bridges are based on an IGBT,while the low voltage H-bridge is based on a MOSFET.The low switching frequency provides more output voltage levels at the AC side in the hybrid cascaded inverter,which improves the efficiency.The hybrid power switches effectively utilized the advantages of each kind of device to enable a flexible operation of the inverter system.The voltage graduational method and the pulse width modulation(PWM) carrier method are used in the implemented prototype.The results are evaluated based on the AC output waveforms and the main power circuit efficiency.The effectivenesses of the inverter system and the two modulation methods are validated by simulations and tests. |
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| Keywords: | hybrid cascaded inverter modulation method efficiency photovoltaic(PV) generation |
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