Advanced grid measurement and simulation solutions from morEnergy

by Christoph Klie

Modern power networks are becoming increasingly complex. The integration of renewable energy, power electronics, electric mobility and industrial automation introduces new challenges in power quality, network stability and high-frequency disturbances. Accurate measurements and reliable simulation tools are essential to understand these interactions and maintain stable electrical systems.

To address these challenges, Astrolkwx offers advanced grid measurement and simulation solutions from morEnergy. The portfolio combines precise network impedance measurements, comprehensive monitoring software and digital simulation capabilities, helping engineers analyse grid behaviour, identify potential resonances and evaluate system performance.

The solutions include the ONIS network impedance spectrometer, Measurement Center software, Digital Twin technology and the mobile ONIS 20kV measurement system.

ONIS: advanced network impedance analysis

The Online Network Impedance Spectrometer (ONIS) from morEnergy is an advanced measurement system designed to analyse network impedance and identify potential resonances in modern electrical grids. With measurement capabilities up to 500 kHz, ONIS provides detailed insights into high-frequency grid behaviour and the interaction between power electronic equipment and electrical infrastructure.

As renewable energy systems, industrial drives and high-power inverters become increasingly integrated into power networks, understanding network impedance is essential for maintaining stable operation. ONIS enables engineers to detect resonance conditions, investigate supraharmonic disturbances and optimise system configurations based on measured grid characteristics.

The system supports applications ranging from photovoltaic power plants and industrial installations to railway power infrastructure, where reliable impedance measurements can help identify potential stability issues and support technical decision-making.

ONIS measurement capabilities

ONIS provides engineers with advanced tools for investigating complex electrical network behaviour:

• High-frequency impedance measurements: Analyse network impedance across frequencies up to 500 kHz.
• Resonance identification: Detect potentially harmful resonance conditions within electrical installations.
• Supraharmonic analysis: Investigate high-frequency disturbances associated with inverters, EV charging infrastructure and renewable energy systems.
• Sub-cycle measurements: Examine impedance behaviour within selected portions of the electrical waveform.
• Multiple configurations: Available in Classic (up to 20 kHz), Premium (up to 150 kHz) and Plus (up to 500 kHz) variants.

Measurement Center: advanced monitoring and analysis software

The morEnergy Measurement Center is a software platform designed to support electrical network measurements, power quality monitoring and detailed data analysis. Working alongside ONIS measurement systems, it provides engineers with a central environment to capture, visualise and evaluate complex grid behaviour.

The platform combines high-resolution waveform analysis with network impedance measurements up to 500 kHz. Interactive heatmaps, impedance diagrams and root locus charts help engineers identify resonance conditions, investigate high-frequency disturbances and evaluate the performance of electrical installations.

Measurement Center also supports simultaneous operation of multiple measurement devices, allowing engineers to compare live measurements with historical data. Measurement results can be exported in CSV format for further evaluation, documentation and laboratory analysis.

Key features of Measurement Center

Measurement Center provides a range of tools for analysing electrical network performance:

• High-resolution waveform capture: Record detailed snapshots of electrical signals, including voltage variations and transient disturbances.
• Network impedance visualisation: Analyse impedance measurements using interactive heatmaps and root locus charts.
• Multi-device management: Control and monitor multiple measurement systems from one software environment.
• Historical data comparison: Compare previous measurements with current results to identify changes in network behaviour.
• Power quality monitoring: Monitor up to 26 electrical parameters, including voltage, current, frequency, power factor and harmonics.
• Automated disturbance detection: Capture voltage dips, transient surges and other abnormal network conditions.

Digital Twin: bringing the grid into the lab

The morEnergy Digital Twin solution enables engineers to recreate real-world electrical network behaviour within a controlled laboratory environment. By using measured grid characteristics to develop digital network models, engineers can investigate system performance, evaluate potential disturbances and test different operating conditions without relying exclusively on measurements in the field.

This approach is particularly valuable when developing new power electronic systems or integrating equipment into complex electrical networks. Digital Twin technology allows engineers to assess how changes in network impedance, operating conditions and system configurations may affect overall performance before equipment is commissioned.

By combining real-world measurement data with simulation tools, morEnergy Digital Twin supports more efficient product development, system validation and grid integration studies. Engineers can evaluate potential stability issues, optimise system designs and reduce the need for repeated on-site testing.

Applications of Digital Twin technology

Digital Twin technology supports a wide range of engineering and research applications:

• Grid integration and stability analysis: Evaluate the impact of renewable energy installations, energy storage systems and other high-power equipment on electrical networks.
• Power electronics development: Test new components and system configurations under simulated network conditions.
• Marine and island networks: Analyse complex electrical systems used in vessels and isolated power networks.
• Product validation: Support testing and verification processes before equipment is deployed in operational environments.
• Research and laboratory testing: Create repeatable test conditions for engineering research and high-power system evaluation.

ONIS 20kV: mobile medium-voltage measurements

The morEnergy ONIS 20kV is a mobile measurement system designed for impedance and admittance analysis in medium-voltage electrical networks. Integrated into a compact 10-foot container, the system enables engineers to perform detailed on-site measurements without the need for permanent measurement infrastructure.

With a measurement frequency range of up to 150 kHz, ONIS 20kV provides valuable insights into network characteristics, harmonic behaviour and potential resonance conditions. These measurements support the assessment of grid stability and help engineers evaluate the interaction between power electronic equipment and medium-voltage infrastructure.

The system is designed for applications in 20 kV industrial and utility networks, as well as specialised 15 kV railway power systems. Its mobile configuration makes it suitable for temporary measurement campaigns, network investigations and technical verification activities at different locations.

Key features of ONIS 20kV

The ONIS 20kV system combines advanced measurement capabilities with a mobile configuration for field applications:

• Impedance and admittance measurements: Analyse electrical network characteristics at frequencies up to 150 kHz.
• Mobile containerised design: A compact 10-foot container allows the system to be deployed at different measurement locations.
• Medium-voltage compatibility: Designed for 20 kV industrial and utility grids and specialised 15 kV railway networks.
• Resonance analysis: Identify frequency-dependent network behaviour and potential resonance conditions.
• Grid verification: Support technical assessments of railway infrastructure, power electronic systems and medium-voltage installations.

Applications across modern power networks

Modern electrical networks face increasing challenges as renewable energy sources, power electronic converters and high-power industrial equipment become more widely integrated. Understanding how these systems interact with existing infrastructure is essential for maintaining power quality, identifying potential resonance conditions and supporting reliable grid operation.

morEnergy’s measurement and simulation solutions support engineers, manufacturers and research organisations across a wide range of applications. From high-frequency impedance measurements in renewable energy installations to laboratory-based system validation and mobile diagnostics in medium-voltage networks, the technology provides valuable insights into complex electrical behaviour.

Key application areas

• Renewable energy systems: Analyse grid impedance and resonance conditions in photovoltaic installations, wind farms and energy storage systems to support stable integration into electrical networks.
• Railway infrastructure: Perform impedance measurements in railway power networks, investigate harmonic interactions and support technical verification of electrical equipment.
• Industrial power networks: Identify high-frequency disturbances and evaluate the interaction between power electronic converters, industrial drives and connected equipment.
• EV charging infrastructure: Investigate supraharmonic emissions and potential interference between multiple high-power charging systems.
• Marine and isolated networks: Simulate complex electrical configurations in vessels and independent power systems to evaluate performance under varying operating conditions.
• Research and development: Use measured network characteristics and digital simulation models to support product development, laboratory testing and system validation.

Explore morEnergy solutions with Astrolkwx

As electrical networks become increasingly complex, reliable measurement data and advanced simulation capabilities are essential for understanding system behaviour and supporting informed engineering decisions.

With morEnergy’s ONIS measurement systems, Measurement Center software and Digital Twin technology, Astrolkwx offers solutions for analysing network impedance, investigating power quality challenges and supporting the development of reliable electrical infrastructure.

Whether you are evaluating a renewable energy installation, investigating disturbances in an industrial network or developing new power electronic equipment, our team can help you explore the measurement and simulation solutions that best fit your application.

Interested in learning more about morEnergy’s grid measurement and simulation solutions? Contact Astrolkwx to discuss your technical requirements.