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Energy-Efficient Dynamic Drive Control for Wind Power Conversion With PMSG: Modeling and Application of Transfer Function Analysis

机译:PMSG的风能转换高效节能动态驱动控制:传递函数分析的建模和应用

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摘要

A method for transfer function based modeling offering an in-depth insight into the systemic behavior of wind energy conversion systems (WECS) is developed. The originally nonlinear behavior of the drive system covering turbine, permanent magnet synchronous generator, and power electronic converter is rearranged and linearized resulting in a compact transfer function description. The locations of transfer function poles and zeros and related stability are readily identified as a function of WECS parameters and the operating point. Drive control design rules making use of the transfer functions for setting the compensation parameters depending on the wind speed are established. The behavioral differences between speed and power control loops can readily be appreciated. The synthesis of a power control loop to closely follow maximum available wind power is performed based on the design rules. In this context, the voltage sourced converter is operated in current mode control to contribute to fast adjustment of air-gap torque while maintaining currents within limits. The direct and quadrature current references are calculated to attain the desired torque at minimal stator current magnitude and so enhance energy efficiency. The dynamic performance of the design is evidenced by time-domain simulation and stochastic analysis.
机译:开发了一种基于传递函数的建模方法,可提供对风能转换系统(WECS)的系统行为的深入了解。重新布置并线性化了包括涡轮机,永磁同步发电机和电力电子转换器在内的驱动系统的原始非线性行为,从而形成了紧凑的传递函数描述。传递函数的极点和零点的位置以及相关的稳定性很容易根据WECS参数和工作点确定。建立了利用传递函数来根据风速设置补偿参数的驱动控制设计规则。速度和功率控制回路之间的行为差​​异很容易理解。根据设计规则,进行功率控制环路的合成,以紧跟最大可用风力。在这种情况下,电压源转换器在电流模式控制下运行,有助于快速调节气隙扭矩,同时将电流保持在限制范围内。计算直流和正交电流参考值可以在最小定子电流大小的情况下获得所需的转矩,从而提高能量效率。时域仿真和随机分析证明了设计的动态性能。

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