基于键图法的直流电网系统模型  

System Model of DC Grid Based on Bond Graph Method

作　　者：刘先正[1] 王兴成[1] 温家良 郭高朋 李金元 

机构地区：[1]大连海事大学信息科学技术学院,辽宁省大连市116026 [2]国网智能电网研究院,北京市海淀区102211

出　　处：《电网技术》2015年第6期1605-1610,共6页Power System Technology

基　　金：国家重点基础研究发展计划项目(973项目)(2012CB215204)~~

摘　　要：为适应直流电网智能、高效、经济运行的要求,实现各换流站间的协调控制,基于六端直流电网物理仿真平台,将多端直流输电系统视为一个多输入、多输出、多控制目标的系统整体进行了数学建模。提出了适用于多节点、系统级仿真的换流器简化模型,分别讨论了各端电源、负载模型的简化方法,利用键图方法对六端树状直流电网进行了等效建模,并提取出其状态空间方程。最后根据电力系统的常规运行要求对直流电网的具体控制目标进行了数学提炼,写出控制问题的约束条件和指标函数,为进一步设计、优化协调控制器提供了基础。To adapt to the intelligent, efficient, economical operation of DC grid, to implement the coordinated control among relevant converter stations, in scenario of six terminal DC grid physical simulation platform, a mathematical model is built, regarding the DC grid in whole as a multi input, multi output and multi control objective system. A simplified converter model suitable for multi node and system level simulation is proposed, a simplified method of power supply and load modeling is discussed, and the bond graph method is utilized to built up an equivalent model of six terminal tree topology DC grid, and a state space equation is extracted. According to the regular operation requirements of electric power systems, control objectives for DC grid is refined, constraint condition and index function are suggested. This paper provides a reference for optimal controller design.

关 键 词：直流电网 多端直流输电 键图法 新能源电力系统 

分 类 号：TM76[电气工程—电力系统及自动化]