Sub-harmonic oscillations attenuation in hardware-in-the-loop models using the Integration Oversampling Method

Hardware-in-the-loop (HIL) technology has become widespread for testing purposes, gaining special importance in micro-grids and renewable energy. One of the main challenges HIL is its use mid or high-frequency applications. In those cases, oversampling gate signals a must to obtain enough accuracy avoid undesirable sub-harmonic oscillations emulation that would not appear real scenario offline electrical simulation. However, handling extra information obtained through increases significantly complexity switched models since methods deal with more than one sample per simulation step. It leads design effort if are designed ad-hoc increased hardware resources when using vendor tools implement techniques. both traditionally implies an increase overall cost system. This paper proposes Integration Oversampling Method (IOM), which manages minimum impact on models’ complexity. fact, power model changed at all uses just switch state The method consists adding small block input signals. Using additional oversampling, it generates set states every step minimizes integrated error reading. experimental results NI myRIO device show clearly enhanced performance IOM transient steady-state operation. At same time, necessary implementation negligible. • Sampling induced loop models. Proposing (IOM) attenuate unexpected oscillations. MATLAB verify IOM. Experimental by open/closed-loop configurations.