A study on the Reactive Power Compensation Effect Calculation by Determining an Accurate Voltage Collapse Point

정확한 전압붕괴점 결정에 의한 무효전력 보상 효과 산정 방법에 관한 연구

Many developing countries has been voltage unstable and the inter- change capability in Korea is limited by voltage instability. In analyzing voltage stability, load model has been considered as constant power, but actual loads vary as voltage changes. In order to incorporating voltage-dependent load model. we need the low-side of P-V curve that can not be obtained by general load flow algorithm. This paper proposes a modified GCF algorithm to obtain a full low-side of P-V curve and a accurate voltage assessment index considering load model. 5-bus sample system and 19-bus real power system are applied to simulate the proposed GCF. Also. the effect of reactive power compensation is illustrated in same systems.