| 引用本文: | 廖坤玉,肖湘宁,罗超,陶顺,杨志超,于弘洋,刘宗烨,刘辉.基于VSC的双馈风电场群宽频带次同步谐振抑制作用分析与实验[J].电力自动化设备,2019,39(10): |
| LIAO Kunyu,XIAO Xiangning,LUO Chao,TAO Shun,YANG Zhichao,YU Hongyang,LIU Zongye,LIU Hui.Effect analysis and experiment of broadband sub-synchronous resonance suppression of DFIG-based wind farm groups based on VSC[J].Electric Power Automation Equipment,2019,39(10): |
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| 摘要: |
| 双馈风电场的次同步谐振频率具有宽频时变特性，为其抑制带来了难题。对此，基于并联型电压源换流器(VSC)技术，设计了双馈风电场群宽频带次同步谐振的抑制装置，并将其安装于风电场群的汇集线上，将抑制装置等效为受控源，给出了分析该装置抑制双馈风电场次同步谐振作用的等值电路的一般形式和简化形式，通过次同步电流的响应方程揭示了其抑制次同步谐振的作用。该装置测取汇集线的次同步电流作为馈入信号，采用宽频滤波器并进行相位补偿的方案提取振荡模态，调整其幅值和相位后，向系统中注入次同步阻尼电流，通过增强系统阻尼实现抑制。不同工况下的数字-物理闭环仿真实验结果表明，通过参数优化设计，该装置能快速、准确地动态检测出宽频带次同步谐振信号并实现有效的抑制，可集中解决大型风电场群的时变次同步谐振。 |
| 关键词: 双馈风电场群 电压源换流器 时变频率 宽频带次同步谐振 谐振抑制 作用分析 数字-物理闭环仿真 |
| DOI：10.16081/j.epae.201909043 |
| 分类号:TM614 |
| 基金项目:国家自然科学基金面上项目(51777066)；中央高校基本科研业务费专项资金资助项目(2017XS011)；国家电网公司科技项目(52010116000S) |
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| Effect analysis and experiment of broadband sub-synchronous resonance suppression of DFIG-based wind farm groups based on VSC |
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LIAO Kunyu1, XIAO Xiangning1, LUO Chao2, TAO Shun1, YANG Zhichao1, YU Hongyang3, LIU Zongye3, LIU Hui4
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1.State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2.Electric Power Research Institute, CSG, Guangzhou 510080, China;3.Global Energy Interconnection Research Institute, Beijing 102209, China;4.Electric Power Research Institute, State Grid Jibei Electric Power Co.,Ltd.,Beijing 100045, China
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| Abstract: |
| The SSR(Sub-Synchrous Resonance) frequency of DFIG(Doubly-Fed Induction Generator)-based wind farm is broadband and time-varying, which brings difficulties to its suppression. Thus, based on the parallel VSC(Voltage Source Converter) technology, the suppression device of broadband SSR for DFIG-based wind farm groups is designed, which is installed on the assemble line of wind farm groups. The suppression device is equivalent to a controlled source, the general form and simplified form of equivalent circuit for analyzing the suppression effect of the device on the SSR of DFIG-based wind farm are given, and the suppression effect is revealed through the response equation of the sub-synchronous current. The sub-synchronous current of the assemble line is measured as the feed-in signal, the oscillation modes are extracted by using the broadband filter and phase compensation scheme, whose amplitude and phase are adjusted, then the sub-synchronous damping current is injected into the system, suppressing SSR by increasing the system damping. Experimental results of digital-physical closed loop simulation under different working conditions show that through parameter optimization design, the device can quickly and accurately detect the broadband SSR signal and realize effective suppression, so as to solve the time-varying SSR of large-scale wind farm groups. |
| Key words: DFIG-based wind farm groups voltage source converter time-varying frequency broadband sub-synchronous resonance resonance suppression effect analysis digital-physical closed loop simulation |
