Control Strategy for Three-Phase Current Source Inverter Based on Optimal Given Value of DC Storage Inductance Current

被引：0
|
作者：
Miao Y. [1 ]
Liu H. [1 ]
Hua Z. [2 ]
Liu J. [3 ]
Cheng Z. [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
[2] School of Electrical Engineering, Southwest Jiaotong University, Chengdu
[3] State Grid Jiangsu Electric Power Maintenance Branch Company, Nanjing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 02期
关键词：
Current source inverter (CSI); Least limited value; Load current control; Optimal given current; Storage inductance current;
D O I：
10.19595/j.cnki.1000-6753.tces.171629
中图分类号：
学科分类号：
摘要：
In space vector modulation process for traditional three-phase current source inverter (CSI), DC storage inductance current is usually considered constant and charge-discharge process is ignored during a carrier period for traditional three-phase current source inverter, which causes storage inductance current discontinuous or continuous increasing. The DC-side topology of CSI was improved in this paper. Firstly, three working modes of storage inductance were analyzed in modulation process. The calculating method for optimal given value of storage inductance current was proposed under each working condition, and the modulation strategy was designed to guarantee storage inductance current constant for improved topology. Secondly, the math model of ac-side was derived in two-phase rotating reference frame. In addition, the closed-loop control system of voltage outer loop and current inner loop was designed. Finally, both the simulation and experimental results show the optimal given value of storage inductance current can meet the demand of ac-side and be maintained within a certain range. Besides, load current of CSI can accurately follow the given, system has good steady and dynamic performance. Thus, the correctness and feasibility of proposed modulation strategy and control method are proved. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：349 / 362
页数：13
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