ONIS
With the Online Network Impedance Spectrometer ONIS high frequency power quality measurements can be performed. Our specialty is network impedance measurement for the detection of dangerous resonances in the frequency range from DC to 500 kHz in the power network. This solution sets us apart from the competition and allows us to detect problems before they occur.
Why ONIS?
Modern high-performance inverter systems can be found in fast charging systems for electric cars, in high-rise elevators, on server farms and in photovoltaic and wind power plants. They normally function reliably even under the most difficult conditions. This highly efficient frequency converter technology not only precisely controls the charging speed or the speed of elevators, but also takes care of energy regulation on the power grid. The reliability of the systems requires that the interactions between the frequency converter and the power grid have been well estimated by the engineers when designing the controller. If this is not the case, due to complex power grids on site, instabilities often occur during operation, resulting in system failures. With our ONIS technology, we prevent problems in the system integration of energy producers and consumers and proactively prevent system and revenue losses.
ONIS Types
- ONIS 600: Measurements on networks with voltages up to 600 Vpeak (400 Vrms)
- ONIS 1000: Measurements on networks with voltages up to 1000 Vpeak (690 Vrms)
ONIS Variants
ONIS 600 and ONIS 1000 as:
- ONIS Classic:
- Frequency range from DC to 20 kHz
- ONIS Premium:
- Frequency range from DC to 150 kHz
- ONIS Plus:
- Frequency range from DC to 500 kHz
Applications
PQ-Check: Checking the Power Quality
Get to the bottom of equipment failures or recurring defects.
Development of charging parks for e-mobility
Determination of dependencies and influences of different e-car models on each other.
Performance of grid interconnection points
Determining the real performance of network interconnection points. Optimal resource allocation for grid expansion.
Current and Power Module
Currents and power of systems are recorded and investigated. With this module, a more extensive recording of network points and plants is possible, as the current is also analysed at high frequency and a calculation of the complex, electrical powers is made possible. For the module, the ONIS measurement system is extended with three analogue inputs for current sensors.
Optional Modules
Module Sub-Cycle Impedance
Determine the so-called sub-cycle impedance, i.e. the impedance of a certain period of the periodic sine wave of the mains voltage.
Current and Power Module
Currents and power of systems are recorded and investigated. With this module, a more extensive recording of network points and plants is possible, as the current is also analysed at high frequency and a calculation of the complex, electrical powers is made possible. For the module, the ONIS measurement system is extended with three analogue inputs for current sensors.
Battery supply module
With the help of the battery supply module, the mobility and flexibility of the ONIS measuring system is increased even further and the measuring system can be used more easily for long-term measurements, among other things.
PQ-Plus module
With the additional module you get a more complete picture of harmonics at the mains connection. Not only symptoms, but also the cause of harmonics become more easily visible. All relevant characteristic values are calculated and displayed according to DIN EN 61000-4-7.
Nominal mains frequency extension
In principle, nominal grid frequencies of the grid to be measured from DC to 800 Hz can be implemented.