Technical-Reports on FLEXsys

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.

Izrada i testiranje simulacijskog modela hibridnog energetskog pretvarača u programskom paketu MATLAB/Plecs

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

U ovom tehničkom izvještaju predstavljen je simulacijski model hibridnog energetskog pretvarača u programskom paketu MATLAB/Plecs. Simulacijski model hibridnog pretvarača obuhvaća mrežni AC/DC pretvarač, istosmjerni međukrug, baterijski DC/DC pretvarač te fotonaponski DC/DC pretvarač.

Mrežni AC/DC pretvarač sastoji se od dvorazinskog PWM izmjenjivača i LCL filtera te je u simulaciji implementirana upravljačko-regulacijska struktura VOC upravljanja istim.

Baterijski DC/DC pretvarač je dvosmjerni silazno-uzlazni pretvarač realiziran pomoću dva tranzistora i dvije povratne diode, te prigušnice na strani baterija.

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.