NEIS 2021 - Conference on Sustainable Energy Supply and Energy Storage Systems

The time- and frequency-variant impedance is gaining importance as a necessary parameter to describe and determine systems and devices. There is a multitude of use-cases ranging from structural health monitoring to PLC applications. Many measuring concepts have been developed and were implemented in prototypes and first commercial solutions. In regard to the power-flow, all active concepts may be divided into either source-based systems, which actively feed a current into a measuring setup, or load-based approaches, which switch passive loads and therefore draw a current from the setup. The main objective of this paper is to compare and distinguish the two basic concepts within a controlled laboratory environment by switching between a constant and a sub-periodically influenced load scenario.

High penetration of electric vehicles into the electrical grid requires a grid-friendly management method to decrease possible congestion issues. In this work, a congestion management concept was modeled and simulated. The concept can be implemented by low voltage distribution system operators and charge point operators through a communication protocol. This paper aims to investigate the effectiveness and efficiency of this management method on different penetration scenarios of electric vehicles by using Python and quasi dynamic simulation method in DIgSILENT Power Factory. The modeling of the electric vehicles, as well as other loads and small generators, was conducted with the Monte Carlo simulation and distribution data based on real measurements.

With the development of power grid communication infrastructure in Germany in recent years, it has become possible to integrate a wide range of energy applications. Due to the lack of a comprehensive modeling approach, the impact testing and integration into the existing infrastructure is still challenging. The modern Smart Meter Gateway infrastructure holds the potential to optimize and protect the electrical grid from instabilities, through the increase of transparency of the current grid state parameters and realization of Demand-Side-Management programs. This paper considers real-time residential load profile modeling of various German household configurations in accordance with the requirements of Smart Meter Gateway as the central communication device in Smart Grid infrastructure. The proposed residential load model is expected to reflect the properties of the German advanced metering infrastructure with the ability to simulate and utilize the Smart Meter Gateway for future energy applications.