考虑分布阻抗及恒电流控制的电解铝负荷建模  

Load Modeling of Electrolytic Aluminum Considering Distributed Impedance and Constant Current Control

作　　者：司大军 孙震龙 徐衍会[2] SI Dajun;SUN Zhenlong;XU Yanhui(Power Grid Planning and Construction Research Center of Yunnan Power Grid Co.,Ltd.,Kunming 650011,China;School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]云南电网有限责任公司电网规划建设研究中心,云南昆明650011 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《华北电力大学学报（自然科学版）》2023年第2期35-43,共9页Journal of North China Electric Power University：Natural Science Edition

基　　金：云南省重大科技专项计划“提升绿色电力消纳的电网运行分析与保护控制关键技术研究及应用”(202002AF080001);南方电网科技项目“云南电网负荷模型与建模方法研究”(YNKJXM20180017).

摘　　要：电解铝负荷在我国西部各省电网快速增长,其中云南电网的电解铝负荷增长最为迅速。近年来的多次安全稳定分析结果表明,当前电网规划和运行部门采用的负荷模型已经不能准确描述电解铝的负荷特性。针对该问题,在详细分析电解铝供电系统结构、恒电流控制策略和电解铝生产过程原理的基础上提出了一种考虑电解系列导线分布阻抗和恒电流控制的电解铝机理式动态负荷模型。基于PMU实测的电解铝负荷特性数据,对比分析了机理式动态负荷模型和现有的30%恒阻抗+30%恒电流+40%恒功率静态负荷模型、100%恒电流静态负荷模型、95%恒电流+5%马达模型的准确度。结果表明,考虑分布阻抗与恒电流控制的机理式动态负荷模型具有最好的拟合效果,可以更准确地描述电解铝负荷的动态特性。The electrolytic aluminum load is increasing rapidly in the power grids of the western provinces in China,especially in Yunnan.The results of safety and stability analysis in recent years indicate that the current load model adopted by the power grid planning and operation department cannot accurately describe the load characteristics of electrolytic aluminum.The structure of the aluminum electrolytic power supply system,constant current control strategy,and production process principle of electrolytic aluminum were analyzed in detail in this paper.On this basis,a dynamic load model of electrolytic aluminum considering distributed impedance of electrolytic cell series wire and constant current control system was proposed.Based on the measured load characteristic data of PMU,the accuracy of the 30%constant impedance+30%constant current+40%constant power static load model,100%constant current static load model,95%constant current+5%motor model,and the dynamic load model of electrolytic aluminum proposed in this paper were compared and analyzed.The results show that the proposed dynamic load model considering distributed impedance of electrolytic cell series wire and constant current control system has the best fitting effect and can describe the dynamic characteristics of electrolytic aluminum load more accurately.

关 键 词：电解铝 负荷模型 负荷特性 分布阻抗 恒电流控制 饱和电抗器 

分 类 号：TM714[电气工程—电力系统及自动化]