CAJ | 학술논문

通过一简单两节点系统,证明节点最大功率总是发生在节点负荷等值阻抗模与电源侧等效阻抗模相等的时候,而与负荷的功率因数无关,但负荷的功率因数决定临界功率的大小.分析PV曲线下半支稳定性及其与节点负荷等值阻抗模的关系,指出在以比较节点负荷等值阻抗模与临界阻抗模来判别系统电压稳定性时应考虑节点的负荷特性.
통과일간단량절점계통,증명절점최대공솔총시발생재절점부하등치조항모여전원측등효조항모상등적시후,이여부하적공솔인수무관,단부하적공솔인수결정림계공솔적대소.분석PV곡선하반지은정성급기여절점부하등치조항모적관계,지출재이비교절점부하등치조항모여림계조항모래판별계통전압은정성시응고필절점적부하특성.
Based on a simple two-node system, it was proved that the maximum power of nodes always occurred when the equivalent impedance module of the nodes was equal to that of the system. It was independent of the load power. However the critical power was dependent upon the load power. The stability of the low part of P-V curves as well as its relationship with the equivalent impedance module of loads was analyzed. A conclusion is drawn that the load characteristic should be considered when the voltage stability of power systems is evaluated by comparing the equivalent impedance module of nodes with their critical impedance module.