基于VSC-HVDC的海上风电小干扰稳定控制

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摘要建立了海上风电经柔性直流输电VSC-HVDC并网数学模型,对系统小干扰稳定进行特征根分析。提出了对VSC-HVDC换流站控制进行改进:将电磁功率增量ΔP_e引入到风电场并网侧换流站控制系统中,增加了阻尼控制,并采用模态控制理论对阻尼控制环节参数进行设计。最后,分别对系统故障和风速扰动两种运行情况下的海上风电并网系统进行了时域仿真分析,结果表明提出的阻尼控制能够有效阻尼同步发电机的功角振荡和海上风电场出力的波动,提高了海上风电并网系统的小干扰稳定性。

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	杨悦
	李国庆

关键词 ：柔性直流输电, 海上风电, 小干扰稳定, 阻尼控制, 模态控制理论

Abstract：The model of the offshore wind power farm based on the voltage source converter high voltage direct current(VSC-HVDC)system is established,and the small signal stability of the system has been analyzed by the characteristic root method.The improvement on the converter of the VSC-HVDC is proposed:The electromagnetic power increment ΔP_e is introduced to the converter control system of the wind power’s grid side,the damping control is utilized,and the parameters of the damping control are determined by the modal control theory.The stability in the cases of the power system short circuit and the wind disturbances of the offshore wind power farm are all simulated in the time domain.The results show that the proposed damping control can effectively inhibit the power angle oscillations and the output power fluctuation of the offshore wind power farm,and thus improve the small signal stability of the onshore grid system.

Key words： VSC-HVDC offshore wind farm small signal stability damping control modal control theory

收稿日期: 2015-05-15 出版日期: 2016-07-15

PACS:

TM712

基金资助:国家自然科学基金(51377016)和吉林省科技发展计划项目(20130206038GX)资助。

作者简介: 杨悦女,1985年生,博士研究生,讲师,研究方向为新能源电力系统安全性与稳定性。E-mail:yangyue@mail.nedu.edu.cn;李国庆男,1964年生,博士,教授,研究方向为电力系统安全性与稳定性。E-mail:lgq@mail.nedu.edu.cn(通信作者)

引用本文:

杨悦,李国庆. 基于VSC-HVDC的海上风电小干扰稳定控制[J]. 电工技术学报, 2016, 31(13): 101-110. Yang Yue ,Li Guoqing. The Small Signal Stability Control of Offshore Wind Farm Based on VSC-HVDC. Transactions of China Electrotechnical Society, 2016, 31(13): 101-110.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I13/101

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