摘要
为解决潮流雅可比矩阵在电压稳定临界点的奇异问题,在传统连续潮流PV-PQ转换逻辑的基础上,计及发电机定转子电流约束来表达发电机的无功动态特性。基于电力系统非线性等值泰勒级数,建立了计及发电机定转子电流约束的节点电压和负荷电流的非线性等值模型。在负荷功率因数任意变化的情形下,将节点电压和负荷电流展开为节点电压模的泰勒级数,能够较大范围地直接计算系统极限潮流和临界电压,加快了计算速度,同时也更加接近电力系统实际运行状态。IEEE典型系统的仿真结果,证明了所建模型的正确性和快速性。
In order to solve the singular problem of Jacobi matrix at the voltage stability critical point,the reactive power dynamic characteristics of generator is expressed considering the stator and rotor current limits on the basis of the traditional PV-PQ transformation logic.Based on the nonlinear equivalent Taylor series of power system,a nonlinear equivalent model of node voltage and load current is set up considering the stator and rotor current limits.Under any changes of load power factor,the node voltage and load current are expanded as the Taylor series of node voltage mode.The proposed method can directly calculate the limit power flows and critical voltages,and accelerate the calculation speed.Moreover,the actual operation state of power system can also be approximated more closely.The accuracy and quickness of the established model are proved by the simulation result of an typical IEEE system.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2017年第8期119-125,共7页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(51577053)
关键词
电力系统
连续潮流
转子电流限制
定子电流限制
非线性等值
电压稳定
power system
continuous power flow
rotor current limit
stator current limit
nonlinear equivalence
voltage stability
