基于轨迹灵敏度的电力系统动态安全预防控制算法研究

提出了一种基于轨迹灵敏度的动态安全调度新方法.该方法首先滤除系统中的无危害故障,通过故障排序选取最严重故障并鉴别最领先发电机,然后依据最严重故障的临界切除时间和其最领先发电机有功输出的近似线性关系,计算最领先发电机至少需要调整的有功输出量,以使最严重故障的临界切除时间大于实际故障切除时间,通过故障中及故障后的系统仿真计算轨迹灵敏度,并依据故障切除后设定时刻领先发电机功角对各发电机有功输出的灵敏度数值,计算全系统内各发电机有功输出的调整量.最后通过对新英格兰10机39节点系统的计算验证了算法的有效性.

STUDY ON PREVENTIVE CONTROL ALGORITHM FOR DYNAMIC SECURITY OF POWER SYSTEMS BASED ON TRAJECTORY SENSITIVITY METHOD

A new dynamic security dispatching method based on trajectory sensitivity is proposed. In this method at first the non-damaging faults in power system are filtrated and through fault sequencing the most severe fault and the most advanced machine are distinguished; then according to the approximate linear relation between the critical clearing time of the most severe fault and the active power output of the most advanced machine, the active output at least to be regulated by this generator is calculated to make the critical clearing time of the most severe fault longer than actual fault clearing time. The trajectory sensitivity is calculated by simulating the system during the fault and after the fault, based on the sensitivity values of the power angle of the most advanced machine to the active power outputs of other generators at the specified moment after the fault is cleaned the regulated amount of active outputs of all generators in the system are calculated. The calculation results of New England 10-machine 39-node system show that the proposed method is effective.