基于准稳态仿真的电压稳定轨迹灵敏度分析方法

提出了基于准稳态(quasi-steady-state,QSS)仿真的电压稳定轨迹灵敏度方法,可提供系统参数和控制变量对状态量的灵敏度.利用轨迹灵敏度预测控制量和参数发生变化情况下系统的中长期时域轨迹,评价系统电压稳定性状况,比较元件对系统电压稳定性的影响,为系统电压稳定控制措施提供信息.轨迹灵敏度方法弥补了传统电压稳定静态灵敏度对模型适应性差、不能体现系统动态特性的缺陷,以及传统时域仿真方法提供信息单一、结论可分析性差的不足

A Method to Analyze Trajectory Sensitivity of Voltage Stability Based on Quasi-Steady State Simulation

A method to analyze trajectory sensitivity of voltage stability based on quasi-steady state simulation is proposed,by which the sensitivity of system parameters control variables to state quantity can be attained.The trajectory sensitivity is utilized to predict the medium-and long-term trajectory in time-domain under the variation of control quantity and system parameters to assess voltage stability of power system,compare influences of power components on voltage stability and provide information to voltage stability control measures.Trajectory sensitivity method can remedy the defects of poor adaptability of traditional static sensitivity of voltage stability to device models and incapability of incarnating dynamic characteristics of power system as well as such shortcomings of traditional simulation methods as only simple information can be provided and poor analyzability of their conclusions.