Analysis of Steady-State Voltage Stability Limit of Radial Distribution Systems Considering Load Characteristics

• Main Authors: Jyh-Cheng Jeng, 鄭至成
• Other Authors: Ching-Lien Huang, Jiann-Fuh Chen
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/92724972776797425270

碩士 === 國立成功大學 === 電機工程研究所 === 83 === Analysis of voltage stability limit is an important topic in the study of a distribution system. In this thesis, the effects of different types of static loads is investigated on the steady-state voltage stability limit for a radial distribution system. The loads adopted in the investigation include constant power loads, constant impedance loads and constant current loads. Furthermore, the uniqueness and existence of the voltage solution are discussed. In solving the load flow problems of the radial power network, the DistFlow technique has been proposed as the most suitable method. In this method, an equivalent two-bus network will be obtained simultaneously. Based on that, the analysis in this thesis is mainly concentrated on the two-bus system. The detailed simulated results are presented to justify the opinions proposed.The result reveal that when a larger part of constant current or constant impedance load is added to the total load, the voltage stability limit will move far into the lower branch of the P-V curve and multiple load flow solutions may exist.