直流输电对电网复杂网络特性的影响

摘要

The complex network theory is used to study the structural characteristics of AC/DC system with high-voltage DC transmission(HVDC), which aims to study the effects of HVDC transmission on the complex network characteristics of the power grid structure. Taking the transmission capacity as an index, the unified definition of the weight of AC and DC transmission lines is presented; By considering both the contribution of the node to system and node network characteristics, the importance of nodes is defined. Based on the above proposed definition, an assessment method for the AC-DC transmission system vulnerability is proposed.Taking IEEE14 system for an example, a simulation analysis with the objective function of commonly used network performance function shows that in the same power system, the introduction of HVDC transmission makes the system characteristics transfer to be scale-free, and enhances the ability to resist random failures, while also shows more vulnerable when facing the calculated attack.This work is supported by National Natural Science Foundation of China (No.60674057).%利用复杂网络理论对含高压直流输电(HVDC)的AC/DC系统的结构特性进行研究,意在研究高压直流输电对电网复杂网络特性的影响.以线路输电能力为指标对交直流输电线路的权重进行了统一定义;在考虑节点对系统贡献力又考虑节点的网络特性下,对节点的重要性进行了定义;提出了基于上述定义的交直流输电系统网络特性评估方法.以IEEE14系统为例,以常用的网络效能函数为目标函数进行仿真分析,得出:同一电力系统中,引入高压直流输电使系统网络特性向无标度特性转移,增强了系统抵制随机故障的能力,同时,对蓄意攻击也表现得更加脆弱.