Research on Grid Impact Suppression in Hydraulic Wind Turbine

Abstract

Abstract:

Taking a hydraulic wind turbine as the research object, mathematical models for wind turbine, fixed displacement pump-variable displacement motor of hydraulic system, synchronous generator and excitation system were established, for the problem of grid impact in hydraulic wind turbine. The mathematical models for impulse current and impact torque were derived. A suppression method for grid impact in hydraulic wind turbine was proposed, by the combination of generator speed control, excitation voltage control and quasi-synchronization monitoring. Using 30kV·A hydraulic wind turbine simulation platform as the simulation and experimental foundation, the grid impact suppression was researched. Simulation and experimental results show that the grid impact suppression proposed has good control effect for impulse current and impact torque, achieving the flexible grid-connection for generator.

Key words: wind power, hydraulic transmission, grid impact, impact suppression

摘要：

以液压型风力发电机组为研究对象，针对其并网冲击问题，建立了风力发电机数学模型、定量泵-变量马达液压调速系统数学模型、同步发电机与励磁系统数学模型，推导了并网过程的冲击电流与冲击转矩数学模型。以数学模型为基础，提出了液压型风力发电机组并网冲击抑制方法，即通过发电机稳速控制、励磁电压控制和准同期监控相结合对机组并网冲击进行抑制。以30kV·A液压型风力发电机组实验台为仿真和实验基础，对机组并网冲击抑制展开研究。仿真和实验结果表明，所提出的并网冲击抑制方法对并网冲击转矩和冲击电流具有较好的控制效果，基本实现了机组柔性并网。

关键词: 风力发电, 液压传动, 并网冲击, 冲击抑制

CLC Number:

TH137

Ai Chao, Yan Guishan, Kong Xiangdong, Chen Lijuan. Research on Grid Impact Suppression in Hydraulic Wind Turbine[J]. China Mechanical Engineering, 2015, 26(15): 1989-1994.

艾超, 闫桂山, 孔祥东, 陈立娟. 液压型风力发电机组并网冲击抑制研究[J]. 中国机械工程, 2015, 26(15): 1989-1994.

References

[1]Guo Yi，Hosseini S，Tang C Y．An Approximate Wind Turbine Control System Model for Wind Farm Power Control[J]．IEEE Transactions on Sustainable Energy，2013，4(1)：262-274．
[2]Redha A M，Dincer I，Gadalla M. Thermodynamic Performance Assessment of Wind Energy System：an Application[J]．Energy，2011，36(7)：4002-4010．
[3]王晓，谢振宇，周红凯. 磁悬浮风力发电机零偏置电流控制策略研究[J].振动与冲击，2014，33(23)：63-67．
Wang Xiao，Xie Zhenyu，Zhou Hongkai. Control Strategy with Zero-bias Current for Magnetic Levitation Wind Power Generator[J]．Journal of Vibration and Shock，2014，33(23)：63-67．
[4]贺益康，胡家兵. 双馈异步风力发电机并网运行中的几个热点问题[J]. 中国电机工程学报，2012，32(27)：1-15.
He Yikang，Hu Jiabing. Several Hot-spot Issues Associated with the Grid-connected Operations of Wind-turbine Driven Doubly Fed Induction Generators[J]. Proceedings of the CSEE，2012，32(27)：1-15.
[5]李文津，汤广福，康勇，等. 基于VSC-HVDC的双馈式变速恒频风电机组启动及并网控制[J].中国电机工程学报，2014，34(12)：1864-1873．
Li Wenjin，Tang Guangfu，Kang Yong，et al. Starting Up and Integration Control of Doubly-fed Variable-speed Constant-frequency Wind Power Generator Based on VSC-HVDC[J]. Proceedings of the CSEE，2014，34(12)：1864-1873．
[6]Muyeen S，Takahashi R，Tamura J．Operation and Control of HVDC-connected Offshore Wind Farm[J]．IEEE Transactions on Sustainable Energy，2010，1(1)：30-37．
[7]孔祥东，艾超，娄霄翔. 液压型风力发电机组并网冲击仿真研究[J]. 系统仿真学报，2012，24(9)：2012-2018.
Kong Xiangdong，Ai Chao，Lou Xiaoxiang. Impact of Grid-connecting Simulation Research of Hydraulic Wind Turbine[J]. Journal of System Simulation，2012，24(9)：2012-2018.
[8]Diepeveen N F B, Segeren M L A. Stretching the Applicability of the Monopile by Using a Delft Offshore Turbine [J].Wind Energy, 2012，5(3)：1-10.
[9]董泳，周绪强，毕强. 风力机与液力变速传动装置匹配工作特性研究[J]. 中国机械工程，2012，23(6)：660-665.
Dong Yong，Zhou Xuqiang，Bi Qiang.Research on Working Characteristics about Wind Rotor Matching with Hydrodynamic Variable Speed Drive Uint[J]. China Mechanical Engineering，2012，23(6)：660-665.
[10]国家电网公司. Q/GDW392-2009风电场接入电网技术规定[S]. 北京：中国电力出版社，2009.
[11]孔祥东，艾超，闫桂山，等．液压型风力发电机组低电压穿越控制方法研究[J]. 中国机械工程，2014，25(16)：2137-2142.
Kong Xiangdong，Ai Chao，Yan Guishan，et al. Research on Control Method of Low Voltage Ride Through for Hydraulic Wind Turbine[J]. China Mechanical Engineering，2014，25(16)：2137-2142.
[12]李光琦. 电力系统暂态分析[M]. 3版. 北京：中国电力出版社，2007.
[13]侯亚敏. 无刷励磁同步发电机励磁控制系统的研究[D]. 广州：华南理工大学，2013.
[14]艾超，孔祥东，陈文婷，等. 液压型风力发电机组主传动系统稳速控制研究[J]. 太阳能学报，2014，35(9)：1757-1763.
Ai Chao，Kong Xiangdong，Chen Wenting，et al. Research on Speed Control of the Main Translation System of Hydraulic Wind Energy Conversion System[J]. Acta Energiae Solaris Sinica，2014，35(9)：1757-1763.
[15]艾超，孔祥东，闫桂山，等. 液压型风力发电机组最优功率追踪控制方法研究[J]. 动力工程学报，2015，35(2)：126-133.
Ai Chao，Kong Xiangdong，Yan Guishan，et al. Research on Maximum Power Point Tracking of Hydraulic Wind Turbine[J]. Journal of Chinese Society of Power Engineering，2015，35(2)：126-133.