电网等值对输电成本的影响  

The Influence of Network Equivalence on Power Transmission Cost

作　　者：孙慧皎[1] 鲍海[1] 王小君[1] 

机构地区：[1]华北电力大学电气工程学院,北京市昌平区102206

出　　处：《中国电机工程学报》2007年第4期79-84,共6页Proceedings of the CSEE

摘　　要：电力网等值是减少潮流计算量的有效手段。等值后电力网的输电成本是否发生变化,是电力市场研究的新问题。基于功率分布理论(电网中任意支路消耗的功率为具有不同分布系数的电源提供的功率分量的代数和)和支路输电费用守恒原则(流入支路的费用等于流出的费用),建立输电成本计算模型,对各节点的输电成本进行了定量分析,指出网络等值前后的输配电成本在被等值网络中有可能发生变化,并通过IEEE30节点算例验证了这一结论。Network equivalence is an effective way to reduce the power flow computation burden. Whether the transmission cost of power network after equivalence will vary is a new problem in the realm of electricity market research. This paper develops a computation model of transmission cost based on power distribution theorem （power distribution theorem is that the consumed power for arbitrary branch of the electrical network equals the summation of elements provided by each source with different distribution coefficients） and branch transmission cost conservation （the cost of branch inflow equals that of branch outflow）. It shows that the transmission and distribution cost before and after the network equivalence will be different. A case study on IEEE 30 bus system verifies the proposed method.

关 键 词：电力市场 输电成本 电力网等值 功率分布理论 费用守恒 

分 类 号：TM76[电气工程—电力系统及自动化]