摘要
为了准确描述发电机无功动态调节作用对静态电压稳定临界点的影响,保证发电机运行在安全极限范围内,建立了考虑发电机安全运行极限的静态电压稳定临界点的互补约束非线性规划模型和算法。根据临界点处发电机励磁电势、定子电流与机端电压互补约束的严格性条件,给出了新模型下快速判断临界点的方法。对5个IEEE系统的计算结果表明,所述模型可以精确地表达发电机无功动态特性,更充分地挖掘系统的电压稳定裕度,对临界点类型和关键发电机节点的判断更为准确,有利于电力系统稳定运行。
In order to accurately describe the impact of dynamic regulation of generators on critical points of static voltage stability and keep generators operate in the safe zone, a new generator model is constructed by nonlinear complementarily constraints and a nonlinear programming model for voltage stability critical point considering generator capability limits is proposed. The type of critical point is judged through analyzing the strict conditions of complementarily constraints of generator field induced voltage, stator current and tei＇minal voltage. The numerical results of five IEEE test systems indicate that the proposed mo＇del can describe the dynamic characteristics of generators and calculate the voltage stability critical point more accurately, the exact judgment of the critical point type and the key generators could be achieved. This work is supported by National Natural Science Foundation of China （No. 50867001, No. 51167001） and Guangxi Provincial Natural Science Foundation of China （No. 2011GXNSFA018018）.
出处
《电力系统自动化》
EI
CSCD
北大核心
2012年第22期12-18,共7页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50867001,51167001)
广西自然科学基金资助项目(2011GXNSFA018018)~~
关键词
电压稳定
临界点
发电机运行极限
互补约束
内点法
voltage stability
critical point
generator Capability limits
complementarily constraints
interior point method
