故障期间,撬棒（crowbar）保护和直流卸荷（chopper）保护的工作状态对双馈风电机组（DFIG）的暂态过程有重要影响。为此,针对三相故障不同严重程度下的双馈风力发电系统,综合考虑撬棒保护和直流卸荷保护的协调控制方式,通过分析转子电流、直流母线电压与机端电压跌落的关系,新建统一的保护动作分析判据;在此基础上,分析撬棒保护和直流卸荷保护在不同电压跌落深度下的状态,并建立统一的双馈电机故障后暂态等值模型。最后基于PSCAD/EMTDC提供的1 MW双馈电机标准模型,验证了所建DFIG暂态等值模型的准确性。
Abstract
Crowbar protection and chopper protection operation state during fault have an important influence on the transient process of doubly-fed induction generator （DFIG）. With the different voltage drop depths, the protection operation states are different, and the corresponding transient equivalent models of DFIG are also different. Therefore, for the doubly-fed wind turbines system with different severity of three-phase fault, the coordinated control mode of crowbar protection and chopper protection is comprehensively considered. Firstly, by analyzing the relationship between rotor current, DC bus voltage and terminal voltage drop, a unified protection action analysis criterion is established. Secondly, the operation states of crowbar protection and chopper protection under different voltage drop depths are analyzed, and a unified post fault transient equivalent model of DFIG is established. Finally, based on the standard model of 1 MW DFIG provided by the PSCAD/EMTDC, the accuracy of the DFIG transient equivalent model is verified.
关键词
双馈风力发电机 /
暂态分析 /
撬棒保护 /
直流卸荷保护
Key words
doubly-fed wind turbines /
transient analysis /
crowbar protection /
chopper protection
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参考文献
[1] BLAABJERG F, MA K.Wind energy systems[J]. Proceedings of the IEEE, 2017, 105(11): 2116-2131.
[2] SAWYER S, QIAO L M, FRIED L.Global wind report-annual market update 2017[M]. Brussels: Global Wind Energy Council, 2018.
[3] FENG Y, LIN H Y, HO S L, et al.Overview of wind power generation in China: Status and development[J]. Renewable and sustainable energy reviews, 2015, 50: 847-858.
[4] WANG Q G, ZHOU N C, YE L.Fault analysis for distribution networks with networks with current-controlled three-phase inverter-interfaced distributed generators[J]. IEEE transactions on power delivery, 2015, 30(3): 1532-1542.
[5] OUYANG J X, ZHENG D, XIONG X F, et al.Short-circuit current of doubly fed induction generator under partial and asymmetrical voltage drop[J]. Renewable energy, 2016, 88(1): 1-11.
[6] 潘文霞, 刘明洋, 张艺博, 等. 单相接地故障下双馈感应发电机短路电流计算[J]. 太阳能学报, 2018, 39(1): 180-185.
PAN W X, LIU M Y, ZHANG Y B, et al.The calculation of short-circuit current of DFIG under single-phase to ground fault[J]. Acta energiae solaris sinica, 2018, 39(1):180-185.
[7] SULLA F, SVENSSON J, SAMUELSSON O.Symmetrical and unsymmetrical short-circuit current of squirrel-cage and doubly-fed induction generators[J]. Electric power system research, 2011, 81(7): 1610-1618.
[8] 尹俊, 毕天姝, 薛安成, 等. 计及低电压穿越控制的双馈风力发电机组短路电流特性与故障分析方法研究[J]. 电工技术学报, 2015, 30(23): 116-125.
YIN J, BI T S, XUE A C, et al.Study on short circuit current and fault analysis method of doubly fed induction generator with low voltage ride-through control strategy[J]. Transactions of China Electrotechnical Society, 2015, 30(23): 116-125.
[9] 邹乐, 吴学光, 寇龙泽, 等. 电网电压对称骤升下双馈风力发电系统的改进控制策略研究[J]. 电网技术, 2020, 44(4): 1360-1367.
ZOU L, WU X G, KOU L Z, et al.Improved control strategy for a doubly-fed generation system under grid voltage symmetric swell[J]. Power system technology, 2020, 44(4): 1360-1367.
[10] 李生虎, 王鹏飞, 孙琪, 等. 计及RSC控制的DFIG短路电流直流分量解析表达[J]. 太阳能学报, 2020, 41(2): 131-136.
LI S H, WANG P F, SUN Q, et al.Analytical expression of DC component of short-circuit currents of DFIG considering RSC control[J]. Acta energiae solaris sinica, 2020, 41(2):131-136.
[11] SULLA F, SVENSSON J, SAMUELSSON O.Short-circuit analysis of a doubly fed induction generator wind turbine with direct current chopper protection[J]. Wind energy, 2013, 16(1): 37-49.
[12] 唐浩, 郑涛, 黄少锋, 等. 考虑Chopper动作的双馈风电机组三相短路电流分析[J]. 电力系统自动化, 2015, 39(3): 76-83.
TANG H, ZHENG T, HUANG S F, et al.Analysis on three-phase short-circuit current of DFIG-based wind turbines considering chopper protection[J]. Automation of electric power systems, 2015, 39(3): 76-83.
[13] 潘文霞, 刘明洋, 杨刚, 等. 考虑Chopper保护的双馈电机短路电流计算[J]. 中国电机工程学报, 2017, 37(18): 5454-5460.
PAN W X, LIU M Y, Yang G, et al.The calculation of short-circuit current doubly-fed induction generator considering chopper protection[J]. Proceedings of the CSEE, 2017, 37(18): 5454-5460.
[14] HUCHEL L, MOURSI M S E, ZEINELDIN H H. A parallel capacitor control strategy for enhanced FRT capability of DFIG[J]. IEEE transactions on sustainable energy, 2015, 6(2): 303-312.
[15] WANG Y, WU Q W, XU H H, et al.Fast coordinated control of DFIG wind turbine generators for low and high voltage ride-through[J]. Energies, 2014, 7(7): 4140-4156.
[16] LIU S M, BI T S, JIA K, et al.Coordination fault-through strategy for doubly-fed induction generators with enhanced reactive and active power support[J]. IET renewable power generation, 2016, 10(2): 203-211.
[17] 曹鹏飞, 邹博, 吴林林, 等. 综合Crowbar和Chopper保护的双馈风机低电压穿越仿真研究[J]. 华北电力技术, 2017, 7(2): 49-54.
CAO P F, ZOU B, WU L L, et al.Research of low voltage ride-through techniques for DFIG based on crowbar and choppe[J]. North China electric power, 2017, 7(2): 49-54.
[18] NOURELDEEN O, HAMDAN I.Design and analysis of combined chopper-crowbar protection scheme for wind power system based on artificial Intelligence[C]//20th International Middle East Power Systems Conference (MEPCON), Cairo, Egypt, 2018: 809-814.
[19] PEREIRA R M M, PEREIRA A J C, FERREIRA C M, et al. Influence of crowbar and chopper protection on DFIG during low voltage ride through[J]. Energies, 2018, 11(4): 1-13.
[20] AMALORPAVARAJ R, KALIANNAN P, PADMANABAN S, et al.Improved fault ride through capability in DFIG based wind turbines using dynamic voltage restorer with combined feed-forward and feed-back control[J]. IEEE access, 2017, 5: 20494-20503.
[21] 熊小伏, 欧阳金鑫. 电网短路时双馈感应发电机转子电流的分析与计算[J]. 中国电机工程学报, 2012, 32(28): 114-121.
XIONG X F, OUYANG J X.Analysis and calculation of rotor currents for doubly-fed induction generators under short circuits in power grides[J]. Proceedings of CSEE, 2012, 32(28): 114-121.
[22] 阿瓦德. 双馈感应电机在风力发电中的建模与控制[M]. 北京: 机械工业出版社, 2014.
GONZALO ABAB.Doubly fed induction machine: modeling and control for wind energy generation[M]. Beijing: China Machine Press, 2014.
[23] LING Y, CAI X, WANG N B.Rotor current transient analysis of DFIG-based wind turbines during symmetrical voltage faults[J]. Energy conversion and management, 2013, 76: 910-917.
基金
国家自然科学基金（51377047）; 国家电网公司总部科技项目（5108-202024029A）
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