Topology and Modulation Strategy of DC-DC Interfacing Converter for Inter-connection Between LCC-HVDC and VSC-HVDC

被引：0
|
作者：
Li Y. [1 ]
Liu C. [1 ]
Zhu M. [2 ]
Zhu L. [1 ]
Chen Y. [2 ]
Cai X. [2 ]
机构：
[1] China Electric Power Research Institute, Nanjing
[2] School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 04期
关键词：
Hybrid DC-DC inter-connection; Isolated DC-DC interfacing converter; MMC; Quasi two level modulation; Submodule voltage balancing strategy;
D O I：
10.13336/j.1003-6520.hve.20190410020
中图分类号：
学科分类号：
摘要：
An isolated dual MMC DC-DC interfacing converter and its modulation strategy are proposed for the inter-connection of Line Commutated Converter HVDC (LCC-HVDC) and Voltage Source Converter HVDC (VSC-HVDC). Full bridge MMC is applied in LCC side and half bridge MMC in VSC side for the different characteristics and demands of LCC-HVDC and VSC-HVDC. The two converters are connected via an intermediate-frequency transformer. A quasi two-level modulation method and its submodule voltage balancing strategy are presented to meet the proposed scenario. According to the analysis of the converter working process, stable power transmission and low submodule voltage pressure can be achieved. According to the submodule energy exchanging analysis, submodule capacitor voltages maintain stable by reasonably setting the phase-shifting angle of submodule with proposed voltage balancing strategy. Simulation and experiment results verify the effectiveness of proposed topology and modulation strategy. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1260 / 1268
页数：8
相关论文
共 19 条
  • [1] Yao L., Wu J., Wang Z., Et al., Pattern analysis of future HVDC grid development, Proceedings of the CSEE, 34, 34, pp. 6008-6020, (2014)
  • [2] Li X., Zeng Q., Wang Y., Et al., Control strategies of voltage source converter based direct current transmission system, High Voltage Engineering, 42, 10, pp. 3025-3037, (2016)
  • [3] Cai W., Zhu M., Li X., Et al., Impedance-source converter based direct current step-up collection system for photovoltaic, Automation of Electric Power Systems, 41, 15, pp. 121-128, (2017)
  • [4] Wang Y., Wang Y., Wang B., Et al., Influence of DC asynchronous interconnection on damping characteristics of sending system, High Voltage Engineering, 45, 7, pp. 2150-2159, (2019)
  • [5] Ma J.J., Zhu M., Cai X., Et al., DC substation for DC grid-part I: comparative evaluation of DC substation configuration, IEEE Transactions on Power Electronics, 34, 10, pp. 9719-9731, (2019)
  • [6] Ma J.J., Zhu M., Cai X., Et al., DC substation for DC grid-part II: hierarchical control strategy and verifications, IEEE Transactions on Power Electronics, 34, 9, pp. 8682-8696, (2019)
  • [7] Xu F., Xu Z., Hybrid HVDC system based on LCC and FHMMC, High Voltage Engineering, 40, 8, pp. 2520-2530, (2014)
  • [8] Yang X., Zheng Q., Lin Z., Et al., Survey of high-power DC/DC converter for HVDC grid application, Power System Technology, 40, 3, pp. 670-677, (2016)
  • [9] Zhang Z., Design and research of high power medium frequency transformer, (2015)
  • [10] Zhao B., Song Q., Li J., Et al., Comparative analysis of multilevel-high-frequency-link and multilevel-DC-Link DC-DC transfor- mers based on MMC and dual-active bridge for MVDC application, IEEE Transactions on Power Electronics, 33, 3, pp. 2035-2048, (2018)
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