双背压双转子改造机组汽轮机及调节系统实测建模试验研究

Experimental study on measured modeling of steam turbine and regulating system of double back pressure and double rotor retrofit unit

电力系统仿真模型中,原有汽轮机及其调节系统模型和参数是基于80%的纯凝工况一次调频试验获得的火电机组进行"双背压双转子"改造后,供热季以低压转子光轴工况运行。电网仿真如果沿用纯凝工况仿真模型,仿真结果会与实际特性产生较大偏差。针对机组低压转子光轴工况开展汽轮机及其调节系统参数实测、建模,并与纯凝工况模型、参数进行对比研究,验证了改造机组重新开展实测建模的必要性。

Power system simulation model of steam turbine and its control system model and parameters is based on the original working condition of 80%pure condensation an FM test,thermal power unit for the“double back pressure double rotor”after modification,the heating season in low-pressure rotor axis operation.Power grid simulation uses the pure condensation condition simulation model,the simulation results will have great deviation with the actual characteristics.In this paper,the parameters of steam turbine and its regulating system are measured and modeled in the light shaft condition of low-pressure rotor of the unit,and compared with the model and parameters of pure condensation condition.It is proved that it is necessary to carry out measurement modeling again.