Analyzing standardization needs for CHIL-based testing of power systems and components

Abstract

Real-time simulation methods for investigations on electric networks and integration of grid connected generation units are increasingly in the focus of ongoing research areas. While laboratory testing methods are the predominant method for the verification of safety and quality related features of gridconnected generation units in the past, load flow modeling verification methods have been integrated in state-of-the-art standardization frameworks recently. The next step is comprised in real-time simulation methodologies applied for compliance testing of entire power electronic systems integrated in power distribution networks. The Controller Hardware-in-the-Loop (CHIL) approach is an appropriate methodology that combines numerical simulations with software modeling approaches and classical hardware testing in labs. Control boards represent the hardware device directly connected to the power electronic periphery, which is entirely simulated in a real-time simulation environment. Hereby, input signals from voltage and current measurements and output signals for power system control are exchanged in real-time. Thanks to this setup the testing of the true behavior of entire generation units within the electric network can be emulated precisely. With the application of CHIL a shorter time to market and a lower risk in the development phase can be achieved. However, an analysis from realized CHIL experiments shows the need for more harmonized procedures. This paper addresses this topic and provides an outlook about necessary future CHIL standardization needs.

Real-Time Simulation-Based Testing of Modern Energy Systems: A Review and Discussion

“…This system integration testing needs to bridge the gap between simulations and field trials and is done in a laboratory. In this context, the concept of digital twin already used in factory automation domain [46] needs to be applied. The reason for this is that due to the amount of possibilities a field test to assess the performance every solution and device would not be possible or at least very time consuming and expensive.…”

“…It can be concluded that HIL simulations became an advanced means for investigative experimentation, model validation, and testing before implementation of electrical subsystems in actual processes [53]. This is reflected in the ongoing standardization efforts [46].…”

Hardware-in-the-Loop Validation of an Energy Management System for LV Distribution Networks with Renewable Energy Sources

“…Background knowledge of the CHIL simulation methodology and its design principles are presented in [22,23]. The authors discuss different CHIL setups used for generation units and network investigations.…”