提高扰动下VSC-HVDC供电电压质量的逆变站控制方法

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (296 KB)
输出: BibTeX | EndNote (RIS)

摘要无源网络由VSC-HVDC供电时, 由于逆变站的输出电抗较大使得受端系统扰动下易遭受电压跌落和电压浪涌问题。为提高VSC-HVDC向无源网络供电的电压质量, 本文提出一种高动态性能的逆变站电压控制方法。首先基于逆变站的数学模型针对负载电流对电压的影响设计了前馈补偿器, 并进一步讨论了逆变器非线性特性对前馈补偿性能的影响, 进而在dq坐标下提出逆变器的非线性补偿方法。此外, 为了克服前馈补偿的参数敏感特性, 引入了PI反馈控制。利用PSCAD/EMTDC的软件在几类系统扰动下对提出的控制方法与直接电压控制方法、传统的前馈补偿方法进行了仿真比较。结果表明, 提出控制方法能有效提高扰动下VSC-HVDC供电的电压质量。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	唐欣
	李建霖
	滕本科

关键词 ：交流电压控制, 电压质量, 非线性补偿, 柔性直流输电

Abstract：The received system is weak and subject to voltage quality problems such as voltage sag and swell when a VSC-HVDC transmission is connected to a passive network. Then, dynamic performance of voltage control directly affects voltage quality in received system and particular care is required in the design of the controller. This paper presents a voltage vector control scheme without an inner current loop to enlarge control bandwidth. In the proposed control scheme, a feed-forward controller is used to reject abruptly changing load current. The influence of inverter nonlinearities on the performance of the feed-forward controller is further discussed. A compensation method for nonlinearities of the inverter is designed in dq rotating axis. Moreover, to overcome parameter sensitivity of the feed-forward controller, a feed-back loop with a PI controller is implemented. Simulations using PSCAD/EMTDC were carried out to show the proposed control scheme under various system disturbances. The simulation results show that with the use of the proposed control scheme, as compared with the direct voltage control, the VSC-HVDC system has a better capability to mitigate voltage fluctuation during system disturbances.

Key words： AC voltage control voltage quality nonlinearity compensation VSC-HVDC

收稿日期: 2012-09-10 出版日期: 2014-03-25

PACS:

TM732

基金资助:国家自然科学基金资助项目(51277013)

作者简介: 唐欣男, 1975年生, 博士, 副教授, 主要从事电力电子在电力系统中的应用的研究。李建霖男, 1989年生, 硕士研究生, 主要从事电力电子在电力系统中的应用的研究。

引用本文:

唐欣, 李建霖, 滕本科. 提高扰动下VSC-HVDC供电电压质量的逆变站控制方法[J]. 电工技术学报, 2013, 28(9): 112-119. Tang Xin, Li Jianlin, Teng Benke. Enhancement of Voltage Quality in a Passive Network Supplied by a VSC-HVDC System Under Disturbances. Transactions of China Electrotechnical Society, 2013, 28(9): 112-119.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I9/112

[1] Flourentzou N, Agelidis V G, Demetriades G D. VSC-based HVDC power transmission systems: An overview[J]. IEEE Transactions on Power Systems, 2009, 24(3): 592-602.
[2] 李兴源. 高压直流输电系统的运行和控制[M]. 北京: 科学技术出版社, 1998.
[3] Zhang L, Harnefors L, Nee H P. Interconnection of two very weak ac systems by VSC-HVDC links using power-synchronization control[J]. IEEE Transactions on Power Systems, 2011, 26(1): 344-355.
[4] 胡兆庆, 毛承雄, 陆继明, 等. 一种新型的直流输电技术——HVDC Light[J]. 电工技术学报, 2005, 20(7): 12-16.
Hu Zhaoqing, Mao Chengxiong, Lu Jiming, et al. New high voltage direct current transmission tech- nology——HVDC light[J]. Transactions of China Electrotechnical Society, 2005, 20(7): 12-16.
[5] IEEE Std, IEEE Guide for Planning DC Links Terminating at AC Locations Having Low Short- Circuit Capacities[S]. 1997: 1204-1997.
[6] IEEE Guide for Identifying and Improving voltage quality[S]. IEEE Std, 2011.
[7] Guo C, Zhao C. Supply of an entirely passive AC network through a double-infeed HVDC system[J]. IEEE Transactions on Power Systems, 2010, 25(11): 2835-2841.
[8] Du Cuiqing, H J Math Bollern, Ambra Sannino. A new control strategy of a VSC-HVDC system for high-quality supply of industrial plants[J]. IEEE Transactions on Power Systems, 2007, 22(4): 2386-2394.
[9] Du C, Agneholm E, Olsson G. Comparison of different frequency controllers for a VSC-HVDC supplied system[J]. IEEE Transaction on Power Delivery, 2008, 23(4): 2224-2232.
[10] Zhang L, Harnefors L, Nee H. Modeling and control of VSC-HVDC connected to island systems[J]. IEEE Transactions on Power Systems, 2011, 26(2): 783-793.
[11] Akshaya Moharana, Dash P K. Input-output linearization and robust sliding-mode controller for the VSC-HVDC transmission link[J]. IEEE Transac- tion on Power Delivery, 2010, 25(3): 1952-1961.
[12] 梁海峰, 李庚银, 王松, 等. VSC-HVDC系统控制体系框架[J]. 电工技术学报, 2009, 24(5): 141-145.
Liang Haifeng, Li Gengyin, Wang Song, et al. VSC-HVDC control system framework[J]. Transac- tions of China Electrotechnical Society, 2009, 24(5): 141-145.
[13] 魏晓光汤广福. 电压源高压直流输电离散模型及其控制策略[J]. 中国电机工程学报, 2007, 27(28): 6-11.
Wei Xiaoguang, Tang Guangfu. Study of VSC-HVDC discrete model and its control strategies[J]. Procee- dings of the CSEE, 2007, 27(28): 6-11.
[14] 周国梁, 石新春, 魏晓光, 等. 电压源换流器高压直流输电不平衡控制策略研究[J]. 中国电机工程学报, 2008, 28(22): 137-143.
Zhong Guoliang, Shi Xinchun, Wei Xiaoguang, et al. Sliding-mode control based VSC-HVDC under unbalanced input voltage condition[J]. Proceedings of the CSEE, 2008, 28(22): 137-143.
[15] 魏晓云, 孙辉, 魏晓光, 等. 改善电能质量的电压源换流器高压直流输电不平衡控制策略[J]. 中国电机工程学报, 2011, 31(9): 8-14.
Wei Xiaoyun, Sun Hui, Wei Xiaoguang, et al. Control strategy about power quality improvement for VSC-HVDC under unbalanced AC grid conditions[J]. Proceedings of the CSEE, 2011, 31(9): 8-14.
[16] Mohamed M Zakaria Moustafa, Filizadeh S. Simulation of a VSC transmission scheme supplying a passive load[C]. The 34th Annual Coference of the IEEE Industrial Electronics Society, 2008: 942-946.
[17] Omar Kotb, Vijay K Sood. A hybrid HVDC transmitssion system supplying a passive load[J]. 2010 Proceedings of Electric Power and Energy Conference, 2010: 1-5.
[18] 陈海荣, 徐政. 向无源网络供电的VSC-HVDC系统的控制器设计[J]. 中国电机工程学报, 2006, 23(26): 43-48.
Chen Hairong, Xu Zheng. Control design for VSC-HVDC supplying passive network[J]. Proceedings of the CSEE, 2006, 23(26): 43-48.
[19] Wang X, Ruan X, Liu S, et al. Full feedforward of grid voltage for grid-connected inverter with LCL-filter to suppress current distortion due to grid voltage harmonics[J]. IEEE Transaction on Power Electronics, 2010, 25(12): 3119-3127.
[20] J Holtz, N Oikonomou. Fast dynamic control of medium voltage drives operating at very low switching frequency—An overview[J]. IEEE Transaction on Power Electronics, 2008, 55(3): 1005-1013.