摘要
应用正规形理论推导了四阶近似的电力系统失稳模式的预测公式,推导了预测电力系统失稳模式公式中的待定的系数;通过讨论预测公式中参变量的性质,得到用该参变量作参照比较各发电机的功角等同于用时间作参照的结果;分析了影响失稳模式的因素;用电科院和新英格兰系统2个算例验证了预测失稳模式的公式的正确性,计算结果表明用该公式能准确预测电力系统的失稳模式。
The predictive formula of fourth-order approximated unstable modes for electric power system is derived with normal form theory,and the elements of nonlinear transformation matrices in the formula is derived too.It is discovered by the discussion of this referenced variable’s pro perty that,the comparison among the power angles of different machines referring to the referenced varia-ble is equal to that referring to time t.The factors,which affect the unstable modes,are analy-zed.The correctness of the prediction formula is verified through two calculation examples of EPRI system and New England system.The results show that the unstable modes of a disturbed power system can be correctly predicted.
出处
《电力自动化设备》
EI
CSCD
北大核心
2003年第10期9-13,共5页
Electric Power Automation Equipment
基金
高等学校博士学科点专项科研基金资助课题(RFDP-98069814)~~
关键词
非线性变换
失稳模式
解耦系统
nonlinear transformation
unstable modes
de-coupled system
