近振荡中心规模化风电对电网阻尼特性的影响

发布时间：2018-04-21 17:42

本文选题：双馈风机 + 风电场　；参考：《电网技术》2017年05期

【摘要】：大扰动冲击后,电网中振荡中心的电压变化幅度大、幅值跌落低,受此影响,其近区风电场功率会出现显著波动,从而加剧风电场与电网交互作用。基于通用电气双馈风机机电暂态仿真模型,分析了并网电压U_s低频跌落与回升过程中,风电场并网系统暂态功率特性,以及不同控制方式对其影响;基于等面积原理,分析了等值电纳B_w的3种典型受扰U_s-B_w轨迹对振荡的影响,并据此揭示了风电场并网系统对电网振荡阻尼的作用机制。通过蒙东外送电网大扰动时域仿真,验证了沽源风电并网系统提升电网振荡阻尼的作用,以及优化风机控制方式增强阻尼能力的效果。
[Abstract]:After the large disturbance, the voltage of the oscillation center in the power grid changes greatly, and the amplitude falls low. Under the influence of this, the power of the wind farm in the near area will fluctuate significantly, which will aggravate the interaction between the wind farm and the power grid. Based on the electromechanical transient simulation model of GE doubly-fed fan, the transient power characteristics of grid-connected wind farm grid-connected system during the low-frequency drop and rise of grid-connected voltage are analyzed, and the influence of different control methods on the transient power characteristics of grid-connected wind farm system is analyzed. The effect of three typical disturbed U_s-B_w trajectories on oscillation is analyzed, and the mechanism of damping of grid oscillation by grid connected system of wind farm is revealed. Through the simulation of the large disturbance time domain of the Mundong outgoing power grid, the effect of the Gu source wind power grid connected system to enhance the oscillation damping of the power grid and the effect of optimizing the fan control mode to enhance the damping ability are verified.
【作者单位】：电网安全与节能国家重点实验室(中国电力科学研究院);华北电力大学电气与电子工程学院;国网西北分部调控中心;
【基金】：国家电网公司科技项目(XT71-15-005)~~
【分类号】：TM712

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