南方电网直流线路电阻时变性评估与实时值估计  

Time-Variability Evaluation and Real-Time Value Estimation of Resistances of HVDC Transmission Lines in China Southern Power Grid

作　　者：顾慧杰[1] 郭烨[2] 周华锋[1] 赵旋宇[1] 吴文传[2] 郑伟业[2] 

机构地区：[1]中国南方电网电力调度控制中心,广东省广州市510623 [2]清华大学电机工程与应用电子技术系,北京市海淀区100084

出　　处：《电网技术》2013年第12期3342-3346,共5页Power System Technology

基　　金：国家高技术研究计划(863项目)(2011AA05A118);南方电网公司科技项目(K-ZB2011-010)~~

摘　　要：对交直流混合电力系统进行准确建模非常重要。直流输电线路的电阻会随温度、输送功率的不同而变化。由于没有电抗参数,直流线路电阻的变化可能会对交直流混合电力系统的分析计算产生明显影响,因此在交直流混合系统中,需要将直流线路的电阻参数作为时变参数处理。利用交叉熵理论排除异常点影响的能力,提出了直流线路电阻的时变程度评估与实时值估计方法,并基于所提的方法,开发了实用化的应用软件在南方电网这一交直流混合电力系统应用。It is very important to build an accurate model for AC-DC hybrid power system. The resistances of HVDC transmission lines will vary with the variation of temperature and transmitted power. Since there is no reactance parameter, the resistance variation of HVDC transmission line may lead to obvious affect on analysis and calculation of AC-DC hybrid power system, thus for AC-DC hybrid power system it is necessary to regard the resistance parameters of HVDC transmission line as time-varying parameters. Leading in the concept of correntropy, the affects of gross errors are excluded, and the time-variability evaluation and real-time estimation methods for HVDC line resistances are proposed consequently. Based on the proposed method, a practicable application software is developed and actually applied in China Southern Grid, which is an AC-DC hybrid power system.

关 键 词：交直流混合电力系统 时变参数 状态估计 参数 估计 交叉熵 

分 类 号：TM721[电气工程—电力系统及自动化]