抽水蓄能电站单机动态特性与控制性能仿真平台

发布时间：2018-05-24 23:23

本文选题：抽水蓄能电站 + 水轮机调节系统　；参考：《华北电力大学》2014年硕士论文

【摘要】：本文主要研究抽水蓄能电站单机动态特性与控制性能,并对其建立仿真平台对各过渡过程动态特性进行仿真实现。针对水轮机调节系统的物理结构建立各模块传递函数,在稳定工况点附近为调节系统建立数学模型,并依据水轮机调节系统的数学模型建立仿真模型,研究抽水蓄能水轮机的十几种工况转换过程、机组并网等工作状态。分析模型机理知,水轮机水头变化引起模型参数变化,动态特性亦变化。论文使用模型参考自适应控制方式对抽水蓄能水轮机进行自适应研究,结合李雅普诺夫稳定性理论和波波夫的超稳定性理论推导出使实际输出满足控制要求的控制器变化规则。最后,分别使用PID控制器与模型参考自适应控制器对机组并网、过渡过程等工作状态进行控制仿真,研究水头变化后的动态特性。比较仿真结果可知,模型参考自适应控制较PID控制超调量小、调节时间短、稳定性好、控制性能良好,能够减小水轮机系统机械损伤。
[Abstract]:In this paper, the dynamic characteristics and control performance of single unit in pumped storage power station are studied, and the simulation platform is established to realize the dynamic characteristics of each transition process. According to the physical structure of the turbine governing system, the transfer function of each module is established, and the mathematical model of the regulating system is established near the point of steady working condition, and the simulation model is established according to the mathematical model of the governing system of the turbine. In this paper, more than a dozen operating conditions of pumped-storage turbines are studied. According to the analysis of the model mechanism, the change of hydraulic head of turbine causes the change of model parameters and dynamic characteristics. In this paper, the model reference adaptive control method is used to study adaptively the pumped storage turbine. Combined with Lyapunov stability theory and Popov's hyperstability theory, the controller variation rules are deduced to make the actual output meet the control requirements. Finally, the PID controller and the model reference adaptive controller are used to control the grid-connected and transient working conditions of the unit, and the dynamic characteristics of the water head after the change of the water head are studied. The simulation results show that the model reference adaptive control has less overshoot, shorter adjustment time, better stability and better control performance than PID control, which can reduce the mechanical damage of hydraulic turbine system.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV743

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