摘要
新型高压直流输电--基于电压源换流器(VSC)的新型高压直流输电(VSC-HVDC)的拓扑 结构变化复杂。文中通过引入单极性二值逻辑开关函数,建立了能够反映VSC-HVDC内部特性 和物理过程的开关函数数学模型。该模型中计及了换流变压器的不同变比及三相电网电压的不平 衡,具有一般性。EMTDC和MATLAB中的仿真结果表明该模型在具有很高准确度的同时,还能 显著缩短仿真时间,提高仿真效率。
The topological changes of the voltage source converter based HVDC (VSC-HVDC) are complicated. In consideration of this characteristic, a mathematical model for this device capable of reflecting its interior characteristics and physical course is developed by introducing the concept of the single-pole two-valued logic switching function. The different ratios of converter transformer and unbalance of three-phase network voltage can also be considered which makes this model more general. With the help of EMTDC and MATLAB Simulink, informative simulation results show that with this model not only can the dynamic characteristics of VSC-HVDC be well presented, but also the speed of simulation can be improved.
出处
《电力系统自动化》
EI
CSCD
北大核心
2005年第8期32-35,共4页
Automation of Electric Power Systems
关键词
电压源换流器
新型高压直流输电
开关函数
建模
Computer simulation
Electric network topology
HVDC power transmission
Mathematical models
Switching functions
