【摘要】 提出了输电线路电子模拟技术原理,并介绍了集中元件、小损耗输电线路及具有频变特性的输电线路的电子模拟方案。该技术依据导线之间电磁联系的数学模型,建立输电线路的等值计算模型。对于模型中数值可由采集量历史记录确定的元件采用数字信号处理器模拟,并通过A/D和D/A转换技术完成物理量与数字量的接口转换;而对于模型中与采集量历史记录无关、反映电压电流瞬时变化关系的元件则用实际元件实现。以小损耗输电线路电子模拟系统为例进行验证,试验结果表明了该原理的可行性,为进一步探讨体积小、投资省、操作方便的电力系统模拟方法奠定了基础。更多还原

【Abstract】 It is very important to simulate transmission lines accurately in power system simulation.Now all kinds of real-time simulation tools have limitations to some extent.This paper presents the principle of electronic simulation of transmission lines and introduces the solutions of electronic simulation of lumped components,low-loss transmission lines and frequency-dependent transmission lines.The technology builds the equivalent model of transmission lines based on the mathematical model of electromagnetic interaction between conductors.In the model,those components of which values can be determined by the history record of sampled quantities are simulated by digital signal processors and the conversion between physical quantities and digital quantities is accomplished by A/D and D/A conversion units.Those components of which values are independent on the history record of sampled quantities and that reflect the relationship of instantaneous voltage and current are realized by themselves.An example simulation system for low-loss transmission lines verifies the feasibility of the proposed principle.The technology establishes the foundation for further exploration of power system simulation methods with space efficiency,low investment and convenient operation.更多还原