摘要
概率不安全指标是基于动态安全域(Dynamic Security Region,DSR)的电力系统安全概率评估模型的核心。通过大量仿真,发现输电线路不同地点故障的DSR变化具有一定的规律性,据此提出了一种基于角度均匀旋转法的输电线路概率不安全指标的快速算法。该方法只需得到线路两端点故障时精确的DSR,即可通过角度旋转快速推算该线路上任意地点故障时的DSR,从而快速求得概率不安全指标。通过WSCC4-11系统验证,采用该方法计算速度显著提高,最大计算误差约为1.96%,能够满足工程计算需要。
Probability insecurity index is the core of probabilistic model of power system security assessment based on DSR. Through the numerical simulation experiment, to the same transmission line, we discover the change of DSR of different fault position has a certain regularity. According to that, the paper presents a rapid calculation to calculate insecurity probabilistic index based on method of angle even rotation. The method only needs the accurate DSR of the two end points, we can calculate the DSR of other locations on the same transmission line rapidly, and then we can get insecurity probabilistic index. Test on WSCC4-11 system shows the calculation speed increases significantly, the biggest error is about 1.96%, that can meet the needs of the engineering calculation.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2014年第16期21-26,共6页
Power System Protection and Control
关键词
电力系统
角度均匀旋转法
动态安全域
概率不安全指标
超平面
power system
angle even rotation
dynamic security region
insecurity probabilistic index
hyper-plane
