基于RTDS的数字与物理混合仿真接口设计与实现

SF6类电力设备内部的局部放电停止后或者取气回实验室进行检测时，尽管设备或样品处于静置状态，但气体分解产物的体积分数依然会随着时间的变化发生不同程度的变化。为提高气体分解产物检测的准确性和可靠性，对静置状态下气体分解产物体积分数随时间的变化（简称为静置效应）展开研究。通过分析SF6的分解机制确定SOF2、SO2F2、CO2三种气体是分解产物中的典型成分，然后在90 L的实验罐体内装设悬浮电位缺陷模型，对其施加2倍的起始局部放电电压，使罐体内的SF6在局放作用下产生分解，进而分析放电停止后这3种主要分解产物的体积分数及比值随时间、初始体积分数的变化规律。结果表明，SOF2和SO2F2两种产物的体积分数随时间呈现不同程度的下降，且初始体积分数越大则下降幅度越大，CO2的体积分数则相对稳定；产物体积分数比值φ(SOF2)/φ(SO2F2)在初始阶段的12 h内随静置时间逐渐下降，并于24 h后逐渐稳定。

Design and Implementation of Digital Physical Hybrid Simulation Interface Based on RTDS

Digital physical hybrid simulation is a new technology in today's power system simulation, and the interface is the core of the hybrid simulation technology. Power interface design for the hybrid real-time simulation of the RTDS and physical model is carried out, and the characteristics of hybrid simulation interface are studied. Technical route for four-quadrant amplifier interface is put forward, therefore the key technical problems of the hybrid simulation interface are solved, and hybrid simulation interface established. Through the hybrid simulation tests of passive physical model and active physical model, and respectively comparing with the pure digital simulation results, the accuracy and stability of the interface are verified. The result provides a reference for the practical application of the hybrid simulation.