静态功角稳定和静态电压稳定判据比较分析  

Analysis of static angularity and voltage stability criteria

作　　者：王正风[1] 胡晓飞[1] 

机构地区：[1]安徽省电力调度通信中心,安徽合肥230022

出　　处：《电力自动化设备》2008年第2期61-64,共4页Electric Power Automation Equipment

摘　　要：指出用传统的静态功角稳定的静态稳定储备系数评估系统静态功角稳定性的不足在于其过于乐观,并容易造成认识上的误区;静态功角稳定和电压稳定的极限均是求取系统潮流的极限值,但静态功角稳定的推导是建立在单机无穷大系统基础上,静态电压稳定的推导则是建立在电源电压恒定的基础上。从电能物理传输原理上对静态功角稳定判据和静态电压稳定判据进行了推导,从而纠正了由于2个不同假设条件推导出的静态电压稳定和静态功角稳定判据的不足,得出了统一的结论。指出通常当线路两端相位差在45°以内时失稳是静态电压稳定失稳,而超过45°是静态功角稳定失稳;传输感性无功功率影响系统的静态功角稳定,将造成系统静态功角稳定的下降和传输功率的下降,而传输容性无功功率正好相反。It is pointed out that power- angle stability may cause applying the static stability reserve coefficient to evaluate the static overassessment. Both static power-angle stability limit and static voltage stability limit are limits of power flow. from the single-infinite system,while the static power resource. The static power-angle stability deduced from power transmission laws,which The static power-angle stability criterion is deduced voltage stability criterion is based on the invariable criterion and the static voltage stability criterion are avoids the assumptions and obtains a uniform conclusion. When the angle difference between two line ends is less than 45° ,it is static voltage instability;otherwise it is static power-angle instability. The transmission of inductance reactive power has impact on static power-angle stability,lowering stability and active power transmission, while the transmission of capacitance reactive power has opposite impact.

关 键 词：静态功角稳定 静态电压稳定 有功功率 无功功率 

分 类 号：TM712[电气工程—电力系统及自动化]