【摘要】 孤网高频事故会影响电网稳定性以及发电机组的安全运行。由于热力系统的复杂性,目前针对孤网高频优化控制问题,采用传递函数或NRTS(非实时仿真)技术进行仿真研究,在仿真精度以及适用性方面存在一定程度缺陷。为提高仿真精度,采用一种RTS(实时仿真)建模技术建立了火电机组动态仿真模型,在仿真精度以及适用性方面有了较大提高,并以实际孤网运行参数对模型进行了验证,分析了孤网高频运行时一次调频下限幅对电网和热力系统运行特性的影响。仿真结果表明,扩大一次调下限幅设置能有效降低孤网高频并保持网频的稳定,为保证热力系统安全和孤网机组高频运行优化控制设计提供了依据。更多还原

【Abstract】 High frequency faults of isolated power grid will seriously affected the stability of power grid and the safe operation of the generator units.In this paper,we used a Real-Time-Simulation(RTS) to establish a dynamic simulation model of thermal power units,the simulation accuracy and applicability have been greatly improved.This paper analyzed the primary frequency limiting impact on high frequency of isolated power grid high-frequency problem.The simulation results show that when the Isolated Network is on high-frequency,expanding the lower limiter settings can effectively reduce the high frequency of the isolated network and keep the stability of the network frequency,but in order to ensure the safety of the thermodynamic system,the lower limiter of primary frequency should not be fully liberalized.更多还原