【作者】 戴晖；

【导师】 沈锦飞；

【作者基本信息】 江南大学 ， 电力电子与电力传动， 2010， 硕士

【摘要】 本文以1.5MW双馈型风机为研究对象,对1.5MW双馈型风机变频器的控制进行了研究。现有的1.5MW双馈型风机的变频器要实现国家电网对风电场提出的无功功率和有功功率的调节、电网电压和频率的要求和对低电压穿越的要求,必须在控制和硬件电路上采取相应的变化。本文设计了1.5MW双馈型风机变频器的整体硬件电路,满足风机整体工作的稳定性和高效率。为实现LVRT功能,设计了一种新的CROW BAR电路,并对电路的控制电路做了改进。研究了1.5MW双馈型风机变频器系统的控制策略,转子侧变换器采用定子磁链定向矢量控制技术,网侧PWM变换器采用电网电压定向矢量控制技术,构建了电流内环、电压外环的双闭环PI控制系统,导出了采用转子有功电流和无功电流独立解耦来控制有功功率和无功功率的策略。以PSCAD/EMTDC平台建立了1.5MW双馈电机整体仿真模型。双馈风力发电机组在定子磁链定向矢量控制策略下,完成了有功无功独立控制,变速恒频运行追踪最大风能,控制风电场电压与频率等预期要求。在电网发生接地故障时刻的仿真中,风机能够在CROW BAR帮助下实现低电压穿越,从而验证了1.5MW双馈型风机的抗干扰和暂态稳定性。在实际1.5MW双馈型风力发电整机平台的基础上,进行了风机的整体调试和并网调试,进行了有速度传感器定子磁场定向矢量控制的1.5MW双馈电机的调试,验证了风机并网发电的控制策略和矢量控制原理,在风机并网发电之后,进行了电压和电流的检测。最后给出了调试测量波形和结果分析。更多还原

【Abstract】 In this paper, double-fed 1.5MW wind turbine as the research object, the 1.5MW double-fed turbine inverter’s control were studied. Existing 1.5MW double-fed turbine inverter of the national grid to achieve the proposed wind farm reactive power and active power regulation, grid voltage and frequency requirements and the requirements for low voltage ride through, hardware must be taken to control and change accordingly.This paper designs 1.5MW double-fed turbine inverter circuit the overall hardware, meet the overall stability of turbine and high efficiency. To achieve LVRT function, this paper designed a new CROW BAR circuit. This paper has studyed 1.5MW DFIM inverter system control strategy, rotor side converter using the stator flux oriented vector control technology, grid side of the PWM converter with grid voltage oriented vector control, construction of the inner current loop, double loop PI voltage outer control system, derived using the rotor active current and reactive current decoupling to separate active and reactive power control strategy. The PSCAD/EMTDC platform 1.5MW DFIG established the overall simulation model. Wind turbines in stator flux oriented vector control strategy, completed an independent active and reactive power control, variable speed constant frequency operation to track the largest wind energy, wind farm control of voltage and frequency expectations. Ground fault in the power of simulation time, the fan can help in CROW BAR for low voltage ride through, which proves the double-fed 1.5MW wind turbine disturbance and transient stability.In practice, double-fed wind power 1.5MW machine platform, based on the overall conduct of the turbine and grid commissioning and commissioning, had been the stator flux oriented speed sensorless vector control of 1.5MW doubly-fed machine debugging, verification, and the turbine grid control strategies and vector control principle, after the turbine and power generation, for the voltage and current detection. Finally, Shows the measured waveforms and debug the results of analysis.更多还原