Technical-Reports on FLEXsys

Creation and testing of the simulation model of the hybrid energy converter in the MATLAB/Plecs software package

Thu, 15 Oct 2026 14:23:39 +0000

This technical report presents a simulation model of a hybrid energy converter in the MATLAB/Plecs software package. The simulation model of the hybrid converter includes a mains AC/DC converter, a DC intermediate circuit, a battery DC/DC converter and a photovoltaic DC/DC converter.

The mains AC/DC converter consists of a two-level PWM converter and an LCL filter, and the control-regulation structure of VOC management of the same is implemented in the simulation.

Development and Experimental Validation of a Battery Charger/Discharger Laboratory Setup for Battery Model Assessment

Thu, 15 Oct 2026 14:23:39 +0000

This technical report details the development and experimental validation of a flexible laboratory setup designed to test battery systems and evaluate battery models for microgrid and economic analyses. The setup incorporates a bidirectional DC/DC converter, battery system, measurement equipment, a Texas Instruments digital signal processor (DSP), and a PC-based human-machine interface (HMI). The DSP enables real-time current and voltage control, supervisory charger and discharger operation, and comprehensive battery-state monitoring, including state of charge (SOC), state of energy (SOE), capacity, efficiency, state of health (SOH), and open-circuit-voltage (OCV)-based SOC correction. The HMI facilitates system control, automated experimental protocols, real-time visualization, and experimental data acquisition.

Technical Characteristics, Flexibility Potential, and Grid Services of Different Flexibility Sources

Thu, 15 Oct 2026 14:23:39 +0000

This technical report presents a comprehensive framework for assessing and quantifying the flexibility potential of four key flexibility sources in modern power systems: utility battery storage, electrolysers, electric vehicles, and pumped hydroplants. With a focus on the European Union context, the report examines the technical characteristics, constraints, and flexibility potential of each source for providing critical power system services including frequency regulation, voltage support, and grid congestion management.

The assessment framework developed in this report enables systematic evaluation of flexibility sources across multiple dimensions, considering technical, economic, and operational factors. Through detailed analysis and case studies, the report demonstrates how different flexibility sources can be compared and optimized for specific grid applications, highlighting their complementary roles in supporting power systems with high shares of renewable energy.