FRANEO 800 PQlyzer for Instrument Transformers – our new solution for wideband testing of instrument transformers for power quality
Power quality (PQ) measurements are an important element of maintaining grid integrity, especially with the shift towards renewable energy. Being responsible for the conversion of of the primary grid signals to the signals received by the power quality meters, Instrument transformers (ITs) play a crucial role in the PQ measurement chain. The instrument transformer wideband ratio and phase accuracy must be evaluated across the entire frequency range to ensure accurate PQ readings. The FRANEO 800 PQlyzer for Instrument Transformers offers a solution for this measurement.
Wideband Ratio Measurements – Capturing Non-Linear Behaviour
ITs often show non-linear variations in their ratio response across different frequencies. For instance, medium voltage inductive voltage transformers typically exhibit a first resonance below 10 kHz due to the resonant circuit of the main inductance and the secondary winding’s layer capacitances. The FRANEO 800 IT PQlyzer allows for measurement or verification of the wideband ratio of instrument transformers, and so to ensure accurate power quality analysis by at the power quality meters.
Importance of Measuring Instrument Transformer Wideband Accuracy
Inaccuracies in instrument transformer ratio or phase accuracy in the harmonic frequency range can distort data received by PQ measurement devices, leading to misinterpretation of power quality events, ineffective corrective actions based on faulty data, and increased risk of equipment damage. The FRANEO 800 IT PQlyzer ensures that the instrument transformer performance adheres to specified tolerances for the intended frequency range. Such error limits for instrument transformers in higher frequency ranges are first introduced in the IEC 61869-1 Edition 2.0.
How the FRANEO 800 IT PQlyzer Works
The FRANEO 800 IT PQlyzer system includes:
- FRANEO 800: A Sweep Frequency Response Analyzer (SFRA) device.
- EIC1 Electronic Impedance Converter: Matches the input impedance of the test setup to the rated burden of the IT under test.
- FRANEO PQlyzer Software: Provides a guided workflow optimized for IT wideband ratio and phase error measurements and analysis.
FRANEO PQlyzer Software – Streamlined Workflow and Analysis
The software simplifies the testing process and data management with a user-friendly interface, step-by-step guidance, data visualization, easy analysis tools, and comprehensive reporting capabilities.
EIC1 Accessory – The Key to Optimal Testing
The EIC1 adjusts the burden seen by the IT under test, replicating real-world operating conditions for accurate test results. It features a dial for selecting the appropriate test burden, ensuring optimal test configuration for various IT types.
Conclusion
The FRANEO 800 IT PQlyzer, with its advanced hardware and user-friendly software, empowers you to perform comprehensive wideband testing of your ITs. Ensuring the accuracy of power quality data provided by ITs helps in making informed decisions for optimizing grid performance, maximizing asset life, and enhancing overall power system reliability.
Take a look at our FRANEO 800 & EIC1 product page do discover all about the new FRANEO 800 IT PQlyzer for precise power quality measurements.
Original Article: https://www.omicronenergy.com/en/news/details/new-protection-test-templates-in-ptl-470-available/
