基于多端柔性直流配电网主动型负荷建模分析  

Analysis of Active Load Modeling Based on Multi-terminal Flexible DC Distribution Network

作　　者：赵祖熠 蔡清亮 迟小翔 ZHAO Zuyi;CAI Qingliang;CHI Xiaoxiang(State Grid Shandong Electric Power Company Super High Voltage Company,Jinan 250000,China)

机构地区：[1]国网山东省电力公司超高压公司,山东济南250000

出　　处：《山东电力技术》2024年第6期52-59,共8页Shandong Electric Power

摘　　要：传统交流配电网络大多存在电能质量及电能可靠性问题,而柔性直流配电网可以很好地解决此类问题。分布式新能源、储能系统等主动型负荷是柔性直流配电网的重要组成部分,对主动型负荷进行建模分析有助于推动直流配电网潮流分析、电压控制等方面的研究。提出一种基于控制模型的主动型负荷建模方法,该方法首先通过数学建模确立主动型负荷的功率-电压特性模型,该模型简化了主动型负荷中电力电子元件在小时间尺度上的变化特性,在秒级尺度上反映主动型负荷的功率-电压特性,极大地减少了直流配电网计算机仿真时的计算量,是一种可以快速仿真运行、能够高度还原主动型负荷电气特性的仿真模型。利用MATLAB/Simulink完成主动型负荷模型的搭建并建验证其特性,并基于所建立的模型研究了主动型负荷到直流配电网的线路长度对其功率特性的影响。Traditional AC distribution networks generally have issues with power quality and reliability,while flexible DC distribution networks can effectively solve such problems.Active loads such as distributed new energy and energy storage systems are important components of flexible DC distribution networks.Modeling and analyzing active loads can help promote research in DC distribution network flow analysis,voltage control,and other aspects.A control model-based active load modeling method was proposed.A power voltage characteristic model for active loads was established,which simplifies the variation characteristics of power electronic components in active loads on a small time scale and reflects the power voltage characteristics of active loads on a second scale.This greatly reduces the computational complexity in computer simulation of DC distribution networks.The simulation model can run quickly and highly restore the electrical characteristics of active loads.An active load model was built using MATLAB/Simulink,and its characteristics were verified.The influence of the length of the line from the active load to the DC distribution network on its power characteristics was studied.

关 键 词：直流配电网 主动型负荷 控制模型 线路电阻 

分 类 号：TM715[电气工程—电力系统及自动化]