The Influence Of Power In Equivalent Network On Power Transmission Cost Calculating

It is necessary to reduce the power flow computation burden,and the network equivalence is an effective way.Since the complexity of the electricity network,it is very common for the network being equivalent within Low-power supply.How the power in equivalent network impact the transmission cost is an important problem in the power market research.This paper develops a calculation model of transmission cost based on power distribution theorem and quantitative analyze the transmission cost of each node in the power network.And finally it calculates and campares the transmission cost in equivalent network with different capacity power before and after the equivalence through two examples in IEEE39 node bus system.Finally,the results show that the grid equivalent calculation for the network transmission cost of a greater impact in a larger power supply network,while the equivalent network in the power capacity is relatively small,the transmission cost is less affected.