Control strategy of modular multilevel converter based on arm current direct control

被引：0

作者：

Xin Y. ^{[1
]}

Wang W. ^{[1
]}

Li G. ^{[1
]}

Wang C. ^{[1
]}

Jiang S. ^{[1
]}

机构：

[1] School of Electrical Engineering, Northeast Electric Power University, Jilin

来源：

| 2018年 / Electric Power Automation Equipment Press卷 / 38期

关键词：

Arm current control; Circulating cur-rent; Dq transform; Flexible HVDC power transmission; Modular multilevel converter;

D O I：

10.16081/j.issn.1006-6047.2018.10.018

中图分类号：

学科分类号：

摘要：

A control strategy of modular multilevel converter based on arm current direct control is proposed to control the AC current, DC current and arm circulating current. Through the theoretical analysis, the relationship between the transmission power of the upper/lower arm and the arm current is obtained. The inner-and outer-loop control system is designed to control the upper/lower arm independently. Respectively, the current of three-phase upper/lower arm is transformed into dq coordinate system, and the command values of each phase current of the upper/lower arm are obtained. Then, the arm circulating current suppressor is used to realize active/reactive power closed-loop control of the converter. The control strategy is validated on the 31-level flexible HVDC power transmission physical experiment platform. The results show that the proposed control method has the advantages of high accuracy and high efficiency suppression of arm circulating current in the converter. © 2018, Electric Power Automation Equipment Press. All right reserved.

引用

页码：115 / 120

页数：5

共 18 条

[1]

Akagi H., Classification, terminology and application of the modular multilevel cascade converter, IEEE Transactions on Power Electronics, 26, 11, pp. 3119-3130, (2011)

[2]

Li C., Tang Z., Lin G., Et al., Parameter optimization strategy of sub-module balancing resistor in MMC, Electric Power Automation Equipment, 37, 10, pp. 146-152, (2017)

[3]

Zhang H., Yuan Z., Zhao Y., Et al., Variable intercept DC-voltage droop control for VSC-MTDC system, Electric Power Automation Equipment, 36, 10, pp. 60-64, (2016)

[4]

Li Y., Jiang W., Yu S., Et al., System design of Zhoushan multi-terminal VSC-HVDC transmission project, High Voltage Engineering, 40, 8, pp. 2490-2496, (2014)

[5]

Yang Y., He Z., Zhou Y., Et al., Control mode and operating performance of Xiamen ±320 kV VSC-HVDC project, Smart Grid, 4, 3, pp. 229-234, (2016)

[6]

Zhou Y., Jiang D., Guo J., Et al., Analysis of sub-module capacitor voltage ripples and circulating currents in modular multilevel converters, Proceedings of the CSEE, 32, 24, pp. 8-14, (2012)

[7]

Wang P., Cui X., Three phases decoupled second harmonic circulation current suppression algorithm for MMC-HVDC, Automation of Electric Power Systems, 37, 15, pp. 47-52, (2013)

[8]

Li G., Xin Y., Wu X., Arm current analysis of modular multilevel converter and its circulating current suppressing method, Automation of Electric Power Systems, 38, 24, (2014)

[9]

Sun Y., Zhao C., Zhao J., Et al., A steady-state control strategy of MMC-HVDC transmission system based on two-phase stationary reference frame, Power System Technology, 37, 5, pp. 1384-1388, (2013)

[10]

Liu H., Yue W., Zhang Y., Et al., Circuiting current res-training strategy based on quasi proportional-resonance control in MMC-HVDC, Automation of Electric Power Systems, 39, 12, pp. 146-151, (2015)

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