长期电压稳定准稳态仿真算法比较  

Comparison of Quasi-Steady-State Simulation Algorithms for Long-Term Voltage Stability

作　　者：陈文广[1] 刘明波[1] 林声宏[1] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640

出　　处：《电网技术》2009年第9期44-51,共8页Power System Technology

基　　金：国家自然科学基金资助项目(50777021)~~

摘　　要：详细论述了准稳态(quasi steady state,QSS)仿真和基于参数连续化技术的准稳态(continuation based quasi steady state,CQSS)仿真方法的基本思想。以3机10节点和新英格兰10机39节点系统为例,根据长期动态过程仿真结果对2种方法进行了比较分析,论证了在QSS仿真中引入负荷参数连续化思想的可行性,避免了求解描述动态负荷恢复过程的微分方程,缩短了计算时间;同时通过先预测后修正的方法提高了QSS仿真的收敛速度,即使系统运行点接近奇异诱导分歧点,通过选择适当的连续化参数仍能保持良好的收敛性。此外CQSS的仿真精度受发电机过励磁和电枢电流限制的影响。Basic principle of quasi-steady-state （QSS） simulation method and continuation-based quasi-steady-state （CQSS） simulation method are expounded. Serving a 3-machine 10-bus system and New England 10-machine 39-bus system as examples and according to simulation results of long-term dynamic process, a comparative analysis on above-mentioned two methods is performed and the feasibility of leading load parameter continuity into QSS simulation is demonstrated, thus it can be avoided to solve differential equations describing the restoration process of dynamic load and the computing time is reduced. Through the approach of revising after predicting, the rapidity of convergence of QSS simulation is improved, that is, to make the operating point of power system being closed to the singularity induced bifurcation point to keep to good convergence by choosing appropriate continuous parameters. Besides, it is discovered that the limitation of both over-excitation and armature current of generators impact the simulation accuracy of CQSS.

关 键 词：长期电压稳定 准稳态仿真 参数连续化技术 电力系统 

分 类 号：TM712[电气工程—电力系统及自动化]