【摘要】 文章推导了单机无穷大系统机端带负荷时系统的6个系数K1～K6、同步转矩系数和阻尼转矩系数。以云南某水电机组为例分析负荷模型对PSS电磁功率信号(-ΔPe)大小、相位和PSS参数整定的影响并通过3机9节点系统的小扰动稳定分析加以验证。通过分析表明,负荷模型对PSS时间常数和放大倍数的整定都有一定程度的影响,负荷与PSS相互作用在不同的情况下对系统稳定性的影响不同,因此,在分析负荷模型对电力系统稳定性的影响时,应考虑PSS的作用,同样,在进行PSS参数整定时,不可忽略机端负荷的影响。更多还原

【Abstract】 Coefficients of K1~K6,the synchronous torque coefficients and the damping torque coefficients of single-machine infinite-bus system with load in machine-side are derived. The influence of load model on the size and phase of the input signals of PSS and PSS parameter setting is analyzed based on a hydropower generating units in Yunnan,and the results are verified through small signal stability analysis of a three-machine and nine-bus system. The research shows that the load model has a certain degree of influence on the time constant and magnification of PSS. The influence on system stability is different under different circumstances when the load and PSS is interacting. The role of PSS should be taken into account while analyzing the influence of load model on power system stability. The influence of load model in machine-side can’t be ignored during the PSS parameter setting.更多还原