負荷抑制を含む(n-1)電坮安定性ランキング手法に関する研究

摘要

電力需要増の鈍化や電力自由化の進展に伴うコスrnトダウンなどを背景に、既設の送電線の一層の有rn効活用を図る傾向にある。これにより、送電線のrn重潮流化が進み、同期化力安定度に加えて電圧安rn定性も厳しくなることが危惧される。%Recently, the loading of existing transmitting facilities of electric power systems are gradually increased in Japan because of construction cost reduction due to the progress of electricity deregulation. This increased loading will causes the decrease of voltage stability margin, especially under (N-1) contingency conditions. The voltage stability can be evaluated by using conventional load flow analysis and the voltage index. However, the conventional methods have disadvantages in terms of heavy computation works.rnTherefore, the voltage stability screening method under (N-1) contingency conditions is newly proposed in this research. The proposed method employs voltage stability index "Pmax" in order to make the fast screening. The severity of the voltage stability of each load point that can be put by using "Pmax" can be examined. The ranking that contains the load shedding is done in this research.