A corrected external equivalent approach using branch equivalent injection power model

作者：Liu, Zhi-Wen^*; Liu, Ming-Bo

来源：Power System Protection and Control, 2010, 38(21): 219-226.

• External network
• Optimal power flows
• Power model
• REI equivalents
• Ward equivalent

During optimal power flow computing based on external network equivalent, the equivalent admittance matrices of external networks need to be recalculated repeatedly and hence computational efficiency is reduced. According to Ward equivalent and REI equivalent, this paper presents the method which replaces the changed branches by means of branch equivalent injection power model to eliminate the influence of changed branches on bus admittance matrices and gain the equivalent admittance matrices which are not associated with changes of branches. The correction of external network equivalent is implemented only through modifying branch equivalent injection power and merging equivalent injection power into boundary buses. Furthermore, results on IEEE 39-bus systems validate the correctness and effectiveness of the proposed method.

• 出版日期2010-11-1
• 单位华南理工大学