Power Loss Modeling and Analysis of Hybrid MMCs with Active Redundancy for Offshore DC Wind Turbines

被引：0
|
作者：
Li H. [1 ]
Xie X. [1 ]
Wu Y. [1 ]
McDonald A. [2 ]
Yang W. [3 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
[2] Faculty of Engineering, University of Strathclyde, Glasgow
[3] CSIC (Chongqing) Haizhuang Windpower Equipment Co., Ltd., Chongqing
来源：
Gaodianya Jishu/High Voltage Engineering | 2021年 / 47卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Active redundancy; Hybrid submodule; Modular multilevel converter; Offshore DC wind turbine; Power loss calculation;
D O I：
10.13336/j.1003-6520.hve.20200715
中图分类号：
学科分类号：
摘要：
The simulation method is not applicable to rapidly assessing the power loss of hybrid modular multilevel converter (HMMC) at initial design stage, and existing analytical models mainly focus on the modular multilevel converter (MMC) constituted by submodules (SMs) with the same structure, without taking into account the impacts of active redundancy. Therefore, we proposed an analytical power loss model for HMMC with active redundancy. Firstly, both fixed level (FL) and voltage sharing (VS) redundancy modes were taken into consideration, and the modulation strategies of half- and full-bridge SMs were analyzed. Then, according to the conduction and switching states of power devices in SMs, the analytical approach to power loss of HMMC with different redundancy modes was derived. Finally, by taking a 10 MW and 10 kV MMC as an example, the efficacy of the proposed model was verified through simulations. Moreover, the influences of different redundancy modes and SM structures on power loss were analyzed and compared. The results show that, at the rated wind speed, the total loss of HMMC almost linearly increases with the increase of redundant half-bridge SMs (HBSMs) or full-bridge SMs (FBSMs). Compared with that in the FL mode, the total loss change with redundant HBSMs is slighter in the VS mode, which becomes greater with redundant FBSMs. The research can provide a theoretical basis for the loss calculation of grid-connected MMC for offshore DC wind turbine. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：2655 / 2667
页数：12
相关论文
共 35 条
  • [1] YARAMASU V, WU B, SEN P C, Et al., High-power wind energy conversion systems: state-of-the-art and emerging technologies, Proceedings of the IEEE, 103, 5, pp. 740-788, (2015)
  • [2] CAI Xu, SHI Gang, CHI Yongning, Et al., Present status and future development of offshore all-DC wind farm, Proceedings of the CSEE, 36, 8, pp. 2036-2048, (2016)
  • [3] WANG M, HU Y W, ZHAO W J, Et al., Application of modular multilevel converter in medium voltage high power permanent magnet synchronous generator wind energy conversion systems, IET Renewable Power Generation, 10, 6, pp. 824-833, (2016)
  • [4] LESNICAR A, MARQUARDT R., An innovative modular multilevel converter topology suitable for a wide power range, 2003 IEEE Bologna Power Tech Conference Proceedings, pp. 1-6, (2003)
  • [5] BAWART M, MARZINOTTO M, MAZZANTI G., Diagnosis and location of faults in submarine power cables, IEEE Electrical Insulation Magazine, 32, 4, pp. 24-37, (2016)
  • [6] QIN J C, SAEEDIFARD M, ROCKHILL A, Et al., Hybrid design of modular multilevel converters for HVDC systems based on various submodule circuits, IEEE Transactions on Power Delivery, 30, 1, pp. 385-394, (2015)
  • [7] VAN T L, NGUYEN T H, LEE D C., Advanced pitch angle control based on fuzzy logic for variable-speed wind turbine systems, IEEE Transactions on Energy Conversion, 30, 2, pp. 578-587, (2015)
  • [8] TANG G, XU Z, ZHOU Y Z., Impacts of three MMC-HVDC configurations on AC system stability under DC line faults, IEEE Transactions on Power Systems, 29, 6, pp. 3030-3040, (2014)
  • [9] XU J Z, ZHAO X B, JING H, Et al., DC fault current clearance at the source side of HVDC grid using hybrid MMC, IEEE Transactions on Power Delivery, 35, 1, pp. 140-149, (2020)
  • [10] LI Guoqing, SONG Zhenzi, WANG Guoyou, Asymmetric full bridge sub-module topology of MMC with DC fault blocking capability, High Voltage Engineering, 45, 1, pp. 12-20, (2019)
1234