基于实际装置的距离保护动态仿真研究

以距离保护为研究对象,分析距离继电器的动作方程在阻抗平面上的动态特性,采取与实际保护装置相同的数据处理过程,开发了距离保护仿真软件。仿真软件数据载入部分采用COM-TRADE格式,图形显示部分采用多视图方法,将距离保护内部各元件的动态工作过程按故障数据的采样点以直观的方式再现出来,实现对保护装置动作过程描述的透明化、可视化、定量化。以实际故障录波数据和基于PSCAD/EMTDC模型仿真产生的故障数据为例对软件进行仿真,分析距离保护的启动元件、选相元件、工频变化量继电器、接地距离继电器的仿真结果,说明软件能精确地再现故障时保护内部各元件的动态行为。并可评估在不同运行工况下,继电器在数据不同采样点之间的动态表现。

Dynamic simulation of distance protection based on real equipment

Taking distance relay as the research object,the dynamic characteristics of its operation equation on impedance plane are analyzed.The simulation software of distance relay is developed applying the same data-handling technique of real protective equipment.COMTRADE data format is used in its data-input module and multi-views graphics are adopted in its display module.The internal information and dynamic behavior of distance relay elements are displayed directly at each sampling point of fault data,which describes the process of protective operation transparently,visually and quantitatively.The simulation software is tested with the real recorded fault data and the simulative fault data based on PSCAD / EMTDC for startup component,phase-selector,power frequency variable relay,grounding distance relay.Test results show that the dynamic behavior of the internal components of real protective equipment under different operating conditions can be exactly re-produced and evaluated.