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

TL;DR

This paper discusses the need for standardization in Controller Hardware-in-the-Loop (CHIL) testing methods for power systems, emphasizing its role in verifying power electronic systems within electric networks and proposing future standardization directions.

Contribution

It analyzes current CHIL testing practices for power systems and outlines necessary future standardization efforts to improve consistency and reliability.

Findings

CHIL enables precise emulation of power electronic system behavior.

Current practices lack harmonized procedures, indicating standardization needs.

CHIL reduces time-to-market and development risks for power systems.

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 grid-connected 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.