An Arm Current Control Strategy for MMC-HVDC Based on Novel Generalized Integrators

被引：0
|
作者：
Liang Y. [1 ]
Liu T. [2 ]
Li Y. [2 ]
Huang W. [2 ]
Liu S. [3 ]
机构：
[1] School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Haidian District, Beijing
[2] State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid, Guangzhou, 510080, Guangdong Province
[3] Beijing Sifang Automation Co., Ltd., Haidian District, Beijing
来源：
| 1600年 / Chinese Society for Electrical Engineering卷 / 37期
关键词：
Arm current control; Modular multilevel converter (MMC); Novel generalized integrator (NGI); Unbalanced grid voltages;
D O I：
10.13334/j.0258-8013.pcsee.162163
中图分类号：
学科分类号：
摘要：
The mathematic model of MMC based on arm currents was established and computational formula of the arm current reference was presented. In order to achieve ac-side current control and circulating current suppression simultaneously, this paper presented an arm current control strategy which is based on the proportional integrator and two sinusoidal signal regulators in parallel in the three-phase stationary frame. This paper presented a novel generalized integrator (NGI), and then thorough analysis and comparison between NGI and the quasi second order generalized integrator (QSOGI) were carried on from the point of time domain and frequency domain. The comparison shows that the control system has good control accuracy and transient performances and big phase margin when NGI is used as the current controller. Simulation results demonstrate that the proposed control strategy can work well under balanced grid voltage as well as under severe grid faults. © 2017 Chin. Soc. for Elec. Eng.
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页码：6708 / 6718
页数：10
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