电网输电能力与拓扑结构的关系及其影响因素  

Influence Factors of Transmission Capacity and the Relationship Between Transmission Capacity and Power Network Topology

作　　者：刘行 丁剑[2] 何静波 吕熹[3] 吉平[2] 王璟 

机构地区：[1]国网保定供电公司,保定071000 [2]中国电力科学研究院,北京100192 [3]华北电力大学电气与电子工程学院,保定071003 [4]国网河南省电力公司经济技术研究院,郑州450052

出　　处：《高电压技术》2017年第10期3463-3472,共10页High Voltage Engineering

基　　金：国家电网公司科技项目(XT71-15-056)~~

摘　　要：为了分别从电网拓扑结构以及电网运行要素角度出发,对电网输电能力的影响因素进行较为全面地梳理。首先,在将实际电网错综复杂的拓扑结构抽象为二维加权图的基础上,又对其进行了二维平面垂直坐标轴方向上的归一化处理,基于电路相关理论推导,证明了增加直连线路对于输电能力的提高效果要优于增加间接连接线路,并经过仿真计算进行了验证;其次,基于多对象耦合多影响因素问题梳理降阶的思路,将输电网按其结构本质分成了点对网型和网对网型两种输电结构,并根据各类网架结构的特点分类研究。结果表明:送受端电网侧、输电通道以及网内电源侧因素皆为影响电网输电能力的因素,并经过大量的实际电网仿真算例进行了验证。这为提高电网的输电能力提供了理论支撑和具体策略。In order to comprehensively summarize the influential factors of transmission capacity from the perspective of grid topology and related operation factors,first of all,the complicated topology in actual power grid was normalized as a two-dimensional weighted graph which was studied only at its axis direction.Based on the relevant circuit theory,it was proved that,as for the improvement of transmission capacity,compared with increasing the amount of indirectly connected transmission line,increasing the amount of directly connected transmission line was more effective,which was validated by simulation.Secondly,based on the idea of reduced order about the problem of multi-object coupling multi-factor,the transmission network structure was divided into point-to-grid and grid-to-grid.Based on characteristics of each structure,influential factors of transmission capacity were extracted from sending end and receiving end power grid,transmission channel and power supply in actual power grid,then its rationality was proved through a large number of actual grid simulation examples.The above content provides the theoretical support and concrete strategies for improving the transmission capacity of power grid.

关 键 词：电网拓扑结构 运行要素 输电能力 影响因素 送受端电网 输电通道 

分 类 号：TM732[电气工程—电力系统及自动化]