考虑配电网结构的电力系统综合负荷建模  

Synthesis Load Modeling of Power System Considering Distribution Network Structure

作　　者：屈星[1] 李欣然[2] QU Xing;LI Xinran(School of Electrical Engineering,University of South China,Hengyang 421001,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]南华大学电气工程学院,湖南省衡阳市421001 [2]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《电力系统自动化》2020年第12期117-123,共7页Automation of Electric Power Systems

基　　金：湖南省教育厅项目(18C0429;18C0471)的资助

摘　　要：电力系统综合负荷模型结构是负荷建模领域中最为基础和关键的问题之一。在电力系统仿真计算中,负荷模型直接与变电站高压母线连接,而负荷一般通过高压配电网接入电网,这在现有的综合负荷模型未能体现。文中提出了一种适用于负荷建模的高压配电网建模方法,基于不复杂化综合负荷模型,将高压配电网等效模型集成至负荷模型中,从而构建了一种考虑配电网结构的综合负荷模型。通过仿真分析可知,所提综合负荷模型在模型描述能力、电压适应范围等方面相较于已有的综合负荷模型有显著的提高,其2种结构形式在模型综合性能方面相近,在参数稳定性和维持负荷电压稳定方面差异不显著。The structure of synthesis load model for power system is one of the most basic and key issues in the field of load modeling.In simulation calculations of power system,the load model is directly connected to the high-voltage bus of substation.However,the loads are actually connected to power gird through the high-voltage distribution network,and the existing synthesis load modeling doesn’t reflect this condition.In this paper,a load modeling method suitable for high-voltage distribution network is proposed.To avoid extra complexity,the equivalent model of high-voltage distribution network is integrated into the load model,and therefore an synthesis load model considering the distribution network structure is developed.The simulation analysis shows that the proposed synthesis load model has a significant improvement in model description ability,adaptation ranges of voltage and other aspects compared with the existing synthesis load models.The two structures are similar in the comprehensive performances,but have slight differences in the parameter stability and the maintenance of load bus voltage.

关 键 词：负荷建模 负荷模型结构 配电网 电力系统 

分 类 号：TM714[电气工程—电力系统及自动化]