Ricoso- Rapid Inverter Control Prototyping and Power-Hardware-in-the-Loop Solution

RICOSO combines Rapid Control Prototyping (RCP), Power Hardware-in-the-Loop (P-HiL), and automated testing in a unified development platform. This enables teams to develop control algorithms faster, validate them under realistic conditions, and test them systematically—without unnecessary system changes.

Quickly from concept to validated control algorithm

In RCP mode, new control algorithms for inverters can be implemented directly on the internal processing unit and tested under realistic conditions. Modeling, programming, monitoring, and control all take place within an integrated development environment. This ensures rapid iterations, high flexibility, and a smooth transition from simulation to laboratory or field validation.

Seamless transition to power testing

Without any modifications, an external real-time computer can be connected, and the system can be switched to P-HiL operation. This allows complex, high-precision models to be emulated and coupled with real components via RICOSO as a power interface. Inverters and energy systems can thus be tested under real power flows—from the early concept phase through to hardware-in-the-loop validation.

Automated Testing with Objective Evaluation

In addition, RICOSO functions as an intelligent test system with automated evaluation. Standardized test sequences can be defined, executed in a reproducible manner, and analyzed automatically—from functional tests to grid codes to dynamic fault scenarios. Measurement data, parameters, and pass/fail criteria are processed and documented directly.

RICOSO combines RCP flexibility, realistic P-HiL emulations, and automated test evaluation into a comprehensive hybrid solution for the development, validation, and characterization of modern inverters.

RICOSO offers a unified, model-based development environment using MATLAB/Simulink or PLECS. Industry-standard libraries for control engineering are supplemented by libraries developed specifically for RICOSO and tested at Fraunhofer IEE. This ensures targeted, rapid development and validation of advanced inverter control and regulation systems.

Work directly from your familiar environment

The environment allows for the direct use of MATLAB/Simulink or PLECS models, as well as programming, monitoring, and controlling the RICOSO system from the familiar working environment. Developers can either work directly on the integrated computing platform or connect external real-time computers from various manufacturers. The workflow remains flexible and scalable—from early concept development through hardware-based validation.

Specialized processes for demanding applications

Specially developed control algorithms are available for complex cases, such a#s:

• grid-forming power converter
• high-performance current limiting
• rapid grid fault detection in the event of voltage deviations

These functions support the development of modern inverters with grid-forming and grid-stabilizing capabilities and enable realistic testing under dynamic grid conditions.

Ready to use right away—even without developing your own controller

RICOSO can be used immediately, even without developing your own controller. Using preinstalled configurations, the system can be deployed as an inverter for various applications and can quickly expand existing test setups. Predefined operating modes are available for, among other things:

• Battery inverters
• On-board chargers
• PV systems with performance curves
• Small wind turbines
   

Flexibility and ready-to-use features in a single system

The integrated RICOSO development environment combines maximum flexibility in control development with ready-to-use functions. It provides an efficient foundation for the rapid implementation and validation of modern energy systems—while complementing the hybrid capabilities of RCP, P-HiL, and automated test evaluation.

The RICOSO amplifier was specifically designed for research and development of grid-forming applications—ideal for interconnected grids as well as stand-alone and microgrids. With 34.5 kW of power, output frequencies up to 2 kHz at full rated voltage, and reliable operation up to 5 kHz, it enables the realistic simulation of highly dynamic grid processes and the development of next-generation control strategies.

Maximum system configuration flexibility 

The system not only features active power bridges in phases A, B, and C, but also allows for active control of the neutral conductor. As a result, in addition to three-phase operation, configurations such as single-phase, two-phase, or split-phase systems can be easily implemented.

Compact, portable, and safe in the lab

Its compact design, which integrates into a 19-inch rack on casters, ensures safe, mobile, and convenient use in laboratory settings.