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随着大型机组的投产,各电网对水电站调节系统的要求也更加严格,建立更能体现机组实际运行情况、稳定性能良好、对大小扰动均能很好适应的仿真模型就显得尤为重要。随动系统作为调速器的执行部分,其内部存在的非线性环节主要由机械因素导致,这些环节在进行仿真建模研究时不可忽略。分析了随动系统非线性环节的产生原因及表现形式,探讨了接力器反应时间常数的现场试验方法,在Matlab/Simulink环境中搭建了精细化的随动系统仿真模型,对一般线性模型及精细化模型同时进行导叶阶跃仿真试验,并通过实测试验与仿真试验的结果对比,验证了包含非线性因素的精细化模型的优越性和准确性。
With the commissioning of large-scale generating units, the demands of various grids for the regulation system of hydropower stations are also stricter. It is particularly important to set up a simulation model that better reflects the actual operation of the generating units, has good stability and can be well adapted to the size disturbances. Follow-up system as an executive part of the governor, its internal non-linear links are mainly caused by mechanical factors, which can not be neglected in the simulation modeling research. The causes and manifestations of nonlinear system of servo system are analyzed. The field test method of relay reaction time constant is discussed. The refined servo system simulation model is established in Matlab / Simulink environment. The general linear model and fine At the same time, the model is compared with the guide vane step simulation test, and the superiority and accuracy of the refined model including the nonlinear factors are verified by the comparison between the actual test and the simulation test.