Capacity Enlarging Method of Series and Parallel MMC and Its Application in Energy Internet

doi:10.3969/j.issn.1000-7229.2015.10.003

Abstract

Abstract:

Energy internet technology can achieve the efficient utilization and long-distance transmission of large-scale renewable energy. The DC grid based on modular multilevel converter （MMC） technology is an important component and effective technical mean of energy internet and renewable energy transmission. However, limited to the existing development of power electronic technology, the rated voltage and rated current of single MMC are hard to increase, which will hamper the large-scale renewable energy transmission over countries or over states. To solve the above challenges, the topological structures of MMCs sub-modules, arms and converters in series and parallel were studied, whose technology advantages and disadvantages applied in large-scale wind power integration transmission were analyzed. Moreover, in order to combine the advantages of line commutated converter （LCC） and MMC and meet the need of future energy internet, the series, parallel structures of LCC and MMC were also studied. At last, the voltage balancing problem for series structure and current balancing problem for parallel structure were simulated and analyzed. Through the comparison on the capacity enlarging methods of various series, parallel structure, it can be concluded that either the series of MMC or the series of MMC and LCC is applicable for high voltage and power application. The research results can provide reference for the construction method and engineering application of high-power converter station.

Key words: energy internet, modular multilevel converter, line commutated converter, series and parallel of converter, wind power integration

CLC Number:

TM 46

XU Bin, LI Chenghao, XIANG Wang, WEN Jinyu, ZHOU Guoliang, LIU Xiaorui. Capacity Enlarging Method of Series and Parallel MMC and Its Application in Energy Internet[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(10): 20-26.

References

［1］曹军威,孟坤,王继业,等. 能源互联网与能源路由器［J］. 中国科学: 信息科学, 2014, 44（6）: 714-727.
Cao Junwei, Meng Kun, Wang Jiye, et al. An energy internet and energy routers［J］. Science China: Information Science, 2014, 44（6）: 714-727.
［2］Huang A Q, Crow M L, Heydt G T, et al. The future renewable electric energy delivery and management （FREEDM） system: the energy internet［J］. Proceedings of the IEEE, 2011, 99（1）: 133-148.
［3］郭飞, 王智冬, 王帅, 等. 我国风电消纳现状及输送方式［J］. 电力建设, 2014, 35（2）: 18-22.
Guo Fei, Wang Zhidong, Wang Shuai, et al. Consumption situation and transmission modes of wind power in China［J］. Electric Power Construction,2014（2）:18-22.
［4］汤广福, 罗湘, 魏晓光. 多端直流输电与直流电网技术［J］. 中国电机工程学报, 2013, 33（10）: 8-17,24.
Tang Guangfu, Luo Xiang, Wei Xiaoguang. Multi-terminal HVDC and DC-grid technology［J］. Proceedings of the CSEE,2013（10）:8-17,24.
［5］姚良忠, 吴婧, 王志冰, 等. 未来高压直流电网发展形态分析［J］. 中国电机工程学报, 2014, 34（34）: 6007-6020.
Yao Zhongliang, Wu Jing, Wang Zhibing, et al. Pattern analysis of future HVDC grid development［J］. Proceedings of the CSEE, 2014, 34（34）: 6007-6020.
［6］胡航海, 李敬如, 杨卫红, 等. 柔性直流输电技术的发展与展望［J］. 电力建设, 2011, 32（5）: 62-66.
Hu Hanghai, Li Jingru, Yang Weihong, et al. The development and prospect of HVDC flexible technology［J］. Electric Power Construction,2011,32（5）:62-66.
［7］侯婷, 饶宏, 许树楷, 等. 基于 MMC 的柔性直流输电换流阀型式试验方案［J］. 电力建设, 35（12）: 61-66.
Hou Ting, Rao Hong, Xu Shukai, et al. Valve type test scheme for flexible DC transmission system based on MMC［J］. Electric Power Construction,2014,35（12）61-66.
［8］Lesnicar A, Marquardt R. An innovative modular multilevel converter topology suitable for a wide power range［C］//Proceedings of Power Tech Conference, Bologna, Italy:IEEE, 2003, 1-6.
［9］王珊珊，周孝信，汤广福，等．模块化多电平电压源换流器的数学模型［J］．中国电机工程学报. 2011, 31（24）: 1-8．Wang Shanshan, Zhou Xiaoxin, Tang Guangfu, et al. Modeling of modular multi-level voltage source converter［J］.Proceedings of the CSEE,2011,31（24）:1-8.
［10］赵昕，赵成勇，李广凯，等. 采用载波移相技术的模块化多电平换流器电容电压平衡控制［J］. 中国电机工程学报，2011,31（21）: 48-55.
Zhao Xin, Zhao Chengyong, Li Guangkai, et al. submodule capacitance voltage balancing of modular multilevel converter based on carrier phase shifted SPWM technique［J］.Proceedings of the CSEE, 2011,31（21）:48-55.
［11］丁冠军，汤广福，丁明，等. 新型多电平电压源换流器模块的拓扑机制与调制策略［J］. 中国电机工程学报，2009, 29（36）: 1-8.
Ding Guanjun, Tang Guangfu, Ding Ming, et al. Topology mechanism and modulation scheme of a new multilevel voltage source converter modular［J］. Proceedings of the CSEE, 2009, 29（36）: 1-8.
［12］管敏渊，徐政．MMC型VSC-HVDC系统电容电压的优化平衡控制［J］．中国电机工程学报, 2011, 31（12）: 9-14.
Guan Minyuan, Xu Zheng. Optimized capacitor voltage balancing control for modular multilevel converter based VSC-HVDC system［J］. Proceedings of the CSEE, 2011, 31（12）: 9-14.．
［13］丁冠军，丁明，汤广福，等．新型多电平VSC子模块电容参数与均压策略［J］．中国电机工程学报，2009，29（30）：1-6．Ding Guanjun, Ding Ming, Tang Guangfu, et al. Submodule capacitance parameter and voltage balancing scheme of a new multilevel VSC modular［J］. Proceedings of the CSEE, 2009，29（30）：1-6．
［14］ABB. Applying IGBTs［EB/OL］. ABB, ［2015-08-22］. http:// www05.abb. com/
［15］孙强，王雪茹，曹跃龙. 大功率 IGBT 模块并联均流问题研究［J］. 电力电子技术，2004, 38（1）: 4-6.
Sun Qiang, Wang Xueru, Cao Yuelong. Study of the current balance of IGBTs in paralleling［J］. Power Electronics,2004,38（1）:4-6.
［16］查申森，郑建勇，苏麟，等. 大功率IGBT 并联运行时均流问题研究［J］. 电力自动化设备，2005, 25（7）: 32-34.
Zha Shensen, Zheng Jianyong, Su Lin, et al. Research on current balancing of parallel IGBTs［J］. Electric Power Automation Equipment,2005,25（7）:32-34.
［17］Pou J， Ceballos S， Konstantinou G， et al. Control strategy to balance operation of parallel connected legs of modular multilevel converters［C］//Industrial Electronics （ISIE）, 2013 IEEE International Symposium on, 2013： 1-7.
［18］Feng Gao，Decun Niu，Chunjuan Jia，Nan Li，Yong Zhao. Control of Parallel- Connected Modular Multilevel Converters［J］. IEEE Transactions on Power Electronics, 2015，30（1）：372-386.
［19］徐政. 柔性直流输电系统［M］. 北京：机械工业出版社，2012.
［20］Qahraman B, Gole A M. A VSC based series hybrid converter for HVDC transmission［C］//2005 Canadian Conference on Electrical and Computer Engineering, 2005:458-461.
［21］Qahraman B, Gole A M, Fernando I T. Hybrid HVDC converters and their impact on power system dynamic performance［C］//2006 Power Engineering Society General Meeting, Montreal, Canada, 2006，5（1）：147-152.
［22］潘武略. 新型直流输电系统损耗特性及降损措施研究［D］. 杭州：浙江大学，2008:83-84.
Pan Wulue. Loss Evaluation and reduction approaches for VSC-HVDC system［D］. Hangzhou: Zhejiang University, 2008: 83-84.
［23］林卫星, 文劲宇, 王少荣, 等. 一种适用于风电直接经直流大规模外送的换流器［J］. 中国电机工程学报, 2014, 34（13）: 2022-2030.
Lin Weixing, Wen Jinyu, Wang Shaorong, et al. A kind of converters suitable for large-scale intergration of wind power directly through HVDC［J］. Proceedings of the CSEE, 2014, 34（13）: 2022-2030.

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