抑制管道水压波动的调速侧实现方法

发布时间：2018-04-01 18:17

  本文选题：调速器　切入点：水压波动　出处：《排灌机械工程学报》2017年08期

【摘要】：借鉴电力系统稳定器超前相位补偿的思想,提出一种导叶超前相位补偿方法,抑制水压波动.利用传递函数模型,计算调速器控制输出信号到水轮机进口断面水压波动的滞后相位角.引入水压波动信号作为相位超前补偿环节的输入信号,相位补偿环节的输出与调速器PID输出累加形成新的控制信号,进而对相位补偿环节的参数设计问题进行了分析.最后,设计仿真试验系统进行仿真研究,结果表明:补偿调节方式可以将导叶开度波动的相位调制到具有一定超前相位角的信号,虽然还不能达到预期设计的超前相位角,但机组暂态稳定性明显改善;采用这种补偿调节方式时,机组正常的有功调节趋势不变,其调节速度加快.因此,通过抑制管道水压波动来改善水力机组暂态稳定性的方法是有效的.
[Abstract]:Based on the idea of advanced phase compensation of power system stabilizer, a leading phase compensation method for guide vane is proposed to suppress the fluctuation of water pressure. The lag phase angle between the governor control output signal and the hydraulic pressure fluctuation at the inlet section of the turbine is calculated. The water pressure fluctuation signal is introduced as the input signal of the phase leading compensation link. The output of the phase compensation link and the output of the governor PID are accumulated to form a new control signal, and then the parameter design problem of the phase compensation link is analyzed. Finally, the simulation test system is designed and simulated. The results show that the compensation regulation can modulate the phase fluctuation of guide vane to the signal with certain leading phase angle. Although it can not reach the expected design advance phase angle, the transient stability of the unit is improved obviously. When this compensation regulation mode is adopted, the normal active power regulation trend of the unit is unchanged, and its regulating speed is accelerated. Therefore, the method to improve the transient stability of hydraulic unit by suppressing the fluctuation of pipeline water pressure is effective.
【作者单位】： 昆明理工大学电力工程学院;昆明理工大学冶金与能源工程学院;昆明理工大学建筑工程学院;
【基金】：国家自然科学基金资助项目(51579124,51469011)
【分类号】：TV734.1
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本文编号：1696702