CAJ | 학술논문

基于三阶感应电动机模型，同时考虑机械转矩参数，给出了快速评估法下极限切除时间的计算方法，分析了转子绕组电磁暂态特性和机械转矩参数对极限切除时间的影响。该方法提高了感应电动机模型精度，同时计算更加简便，可用于动态安全评估系统的计算。IEEE30系统仿真结果表明较高的机械转矩次数有利于负荷节点暂态电压稳定，而转子绕组的电磁暂态特性不利于负荷节点的暂态电压稳定，模型精度对极限切除时间的影响小于机械转矩参数的影响。
기우삼계감응전동궤모형，동시고필궤계전구삼수，급출료쾌속평고법하겁한절제시간적계산방법，분석료전자요조전자잠태특성화궤계전구삼수대겁한절제시간적영향。해방법제고료감응전동궤모형정도，동시계산경가간편，가용우동태안전평고계통적계산。IEEE30계통방진결과표명교고적궤계전구차수유리우부하절점잠태전압은정，이전자요조적전자잠태특성불리우부하절점적잠태전압은정，모형정도대겁한절제시간적영향소우궤계전구삼수적영향。
Based on three-order induction motor load model and considering different mechanical torque, a method for calculating critical clearing time under rapid assessment is presented. The effect on critical clearing time by rotor winding electromagnetic transient characteristics and mechanical torque parameters is analyzed. The proposed method improves the accuracy of induction motor load model, and the time index can be calculated more simply so that this method can be used in dynamic security assessment system as a computational engine. The simulation result of IEEE30 bus system shows that the power of mechanical torque benefits the transient voltage stability of load nodes, and the electromagnetic transients in rotor winding harm the transiet voltage stability;the effect of model accuracy on critical clearing time is smaller than that of mechanical torque parameters.