PQDIF and COMTRADE define two industry standard file formats for power quality and oscillography data.
If no higher-level power quality software is accessible (e.g. DranView, PQView) or if evaluation at device level is not sufficient, the PQDiffractor® is a very good alternative. With the free PQDiffractor® PQ data can be viewed, searched, diagnosed as well as converted.
The PQDiffractor® offers the following functions:
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- Reading binary PQDIF files using IEEE Std 1159.3-2003 specifications
- Reading of ASCII or binary COMTRADE files using the specifications of IEEE Std C37.111-1991 or C37.111-1999
- View lists of data source records in each PQDIF file.
- View lists of observation records in each PQDIF file.
- Viewing the lists of analog and digital channels from COMTRADE configuration files
- Display lists of the quantity types associated with each PQDIF observation record.
- View the list of channel instances associated with each PQDIF observation record.
- View tags and values from records, definitions and instances stored as tables in PQDIF files.
- Viewing samples from analog COMTRADE waveforms and digital status channels.
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- Export charts to CSV text formats
- Exporting diagrams to EMF, WMF, BMP, JPEG and PNG graphic formats
- Exporting displayed observations to Microsoft Excel as CSV files
- Convert native binary PQDs to XML. This allows a PQDIF file to be read or searched with a text or XML parser. This function can be automated with a command line option.
- Convert native binary PQD to XML (structure and the definitions).
- Create interactive graphs from PQDIF observations with channels of any quantity type, including value logs, waveforms, phasor, mag-major time, mag-major, response, X-Y, X-Y-Z, flash density, cumulative probability frequency, histogram, and 3D histogram.
- Identify numerous IEEE 1159.3 PQDIF conformance issues.
- Identify numerous PQView compatibility issues with PQDIF files.
Attention with PQDIF
Although the PQDIF format has been standardized according to IEEE1159.3, variances in the data structure are part of everyday life. For this reason it is advisable to check the respective generated PQDIF format for correct readability. This is especially true in the context of higher-level software.