| 引用本文: | 刘平,刘美琦,苗轶如,刘涛,李珊瑚,黄守道.基于LCC的三相四线制逆变器特性分析与控制[J].电力自动化设备,2023,43(2): |
| LIU Ping,LIU Meiqi,MIAO Yiru,LIU Tao,LI Shanhu,HUANG Shoudao.Characteristic analysis and control of LCC-based three-phase four-wire inverter[J].Electric Power Automation Equipment,2023,43(2): |
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| 摘要: |
| 传统的三相四线制逆变器存在拓扑结构与控制复杂、工频变压器导致体积庞大等问题。以一种简单的基于LCC网络的三相四线制逆变器为研究对象，深入分析了其构造原理与工作特性，其每一相输出电压独立于负载，因此在为多种不平衡负载供电时具有输出电压自平衡功能。LCC网络的增益还可以提高直流母线电压利用率，满足电气化交通领域的应用需求。给出了LCC网络的参数设计流程。针对LCC网络内部复杂的耦合关系，采用双序αβ坐标系与单序dq坐标系结合的解耦控制方法，对其进行计算机仿真，并且搭建了1 kW/105 V的原理性实验平台，与4种典型三相四线制逆变器进行对比，验证了理论分析的正确性与所提控制方法的有效性。 |
| 关键词: 不平衡负载 LCC网络 逆变器 电气化交通 双序解耦控制 |
| DOI：10.16081/j.epae.202206023 |
| 分类号:TM464 |
| 基金项目:省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学)开放课题基金资助项目(EERI_KF2020011) |
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| Characteristic analysis and control of LCC-based three-phase four-wire inverter |
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LIU Ping1,2, LIU Meiqi1, MIAO Yiru1, LIU Tao1, LI Shanhu2, HUANG Shoudao1
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1.College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;2.State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
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| Abstract: |
| There are some problems in traditional three-phase four-wire inverters, such as complex topology and control, large volume caused by industrial frequency transformers and so on. Taking a simple three-phase four-wire inverter based on LCC network as the research object, the construction principle and working characteristics are deeply analyzed. The output voltage of each phase is independent of loads, so it has the function of output voltage self-balancing under a variety of unbalanced loads. The gain of LCC network can also improve the utilization of DC bus voltage and meet the application requirements in the field of electrified transportation. The parameter design flow of LCC network is given. Aiming at the complex coup-ling relationship in LCC network, the decoupling control method based on the combination of double order αβ coordinate system and single sequence dq coordinate system is adopted and simulated by computer. A 1 kW/105 V principle experimental platform is established. Compared with four typical three-phase four-wire inverters, the results verify the correctness of theoretical analysis and the effectiveness of the proposed control method. |
| Key words: unbalanced loads LCC network electric inverters electrified transportation double sequence decoupling control |
