新型H桥级联型风机并网检测装置研制
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摘要
在调研风电机组并网检测相关需求的基础上,提出一种能够兼顾低电压穿越(LVRT)和电能质量指标扰动穿越能力检测的实验设备。该装置采用H桥级联型多电平变流器结构,配合载波移相脉宽调制(CPS-PWM)策略和直接矢量控制模式,实现了电压跌落、谐波、电压波动、不平衡等多种扰动电压输出,从而为风电机组并网测试创造条件。在Matlab/Simulink仿真分析的基础上,研制了可移动式35kV/4MVA风电机组并网检测装置,仿真分析和实际装置的现场实验结果验证了装置主电路和控制策略的正确性。除了风电机组并网检测外,该装置还可应用于光伏电站并网检测、静止无功发生器(SVG)出厂性能检测,应用前景广阔,极具推广价值。
On the basis of investigating the related requirements of grid connection detection for wind turbines,a test equipment that can consider both low voltage ride through(LVRT) and power quality index disturbance ride capability detection is proposed.The device adopts the structure of H-bridge cascaded multilevel converter with carrier phase shift pulse width modulation(CPS-PWM) modulation strategy and direct vector control mode,voltage sag,voltage fluctuation,harmonic and unbalanced voltage output to achieve a variety of disturbance, so as to create conditions for wind generator test.On the basis of Matlab/Simulink simulation and analysis,a mobile 35 kV/4 MVA wind turbine connected detection device is developed.Simulation analysis and field test results of the actual device verify the correctness of the main circuit and control strategy of the device.In addition to wind power grid connection detection, the device can also be applied to photovoltaic power station grid connection detection and static var generator(SVG) factory performance detection.It has broad application prospects and has great popularization value.
On the basis of investigating the related requirements of grid connection detection for wind turbines,a test equipment that can consider both low voltage ride through(LVRT) and power quality index disturbance ride capability detection is proposed.The device adopts the structure of H-bridge cascaded multilevel converter with carrier phase shift pulse width modulation(CPS-PWM) modulation strategy and direct vector control mode,voltage sag,voltage fluctuation,harmonic and unbalanced voltage output to achieve a variety of disturbance, so as to create conditions for wind generator test.On the basis of Matlab/Simulink simulation and analysis,a mobile 35 kV/4 MVA wind turbine connected detection device is developed.Simulation analysis and field test results of the actual device verify the correctness of the main circuit and control strategy of the device.In addition to wind power grid connection detection, the device can also be applied to photovoltaic power station grid connection detection and static var generator(SVG) factory performance detection.It has broad application prospects and has great popularization value.
引文
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[2]王海明,韩肖清,秦文萍,等.风电场谐波分析及治理方案研究[J].电气应用,2015,11(34):104-108.
[3]何世恩,董新洲.大规模风电机组脱网原因分析及对策[J].电力系统保护与控制,2012,40(1):131-138.
[4]叶希,鲁宗相,乔颖.大规模风电机组连锁脱网事故机理初探[J].电力系统自动化,2012,35(8):11-17.
[5]吴义纯,丁明.风电引起的电压波动与闪变的仿真研究[J].电网技术,2009,33(20):125-130.
[6]王仲鸿,沈裴,吴铁铮.FACTS技术研究现状及其在中国的应用与发展[J].电力系统自动化,2000,24(23):1-5.
[7]武守远,周孝信,赵贺,等.电力系统最新技术:灵活交流输电系统的发展及研究[J].电网技术,1996,20(5):1-3.
[8]李庚银,陈志业,丁巧林,等.dq0坐标系下广义瞬时无功功率定义及补偿[J].中国电机工程学报,1996,20(10):176-179.
[9]孙驰,魏光辉,毕增军.基于同步坐标变换的三相不对称系统的无功与谐波电流的检测[J].中国电机工程学报,2003,23(12):43-48.
[10]马莉,周景海,吕征宇,等.一种基于d,q变换的改进型谐波检测方案的研究[J].中国电机工程学报,2000,20(10):55-58.