Coordinator: Věra Nováková Zachovalová

A new modular setup for sampling power and power quality (PQ) measurements based on a review of the best existing setups has been designed, developed and validated. In addition, calibration methods have been developed for the most commonly used system components such as current shunts, voltage dividers and wideband digitizers, with the aim of extending traceability of power and PQ measurements up to 1 MHz.  

The project has identified that most metrology laboratories already had access to either sampling digital multimeters (DMMs) such as Agilent’s 3458A or to wideband digitizers (mostly National Instruments 5922). The sampling DMM 3458A offers unparalleled stability and linearity for low frequency (LF) measurements (up to approximately 20 kHz). To cover the frequency range up to 1 MHz the use of high-speed digitizers such as NI 5922 is necessary.  

This project has reviewed and compared the best existing setups and methods already developed by National Metrology Institutes (NMIs) and Designated Institutes (DIs) in the power and PQ measurement field as a basis for the design of the new modular setup. Then, new capabilities and calibration methods have been investigated and developed with the aim of extending traceability of power and PQ measurements up to 1 MHz.  

Solutions that would allow continuous sample streaming using a sampling DMM 3458A to enable the capture and processing of extended waveforms have been developed, which are necessary for the measurement of certain PQ parameters. In addition, the possibilities of improving the temperature dependence and stability of the gain for NI 5922 digitizers have been investigated. Then, a modular measurement setup for power and PQ quantities has been designed and developed by the involved partners, integrating the components with a software tool separately developed within the project to obtain a complete measurement setup. Finally, the entire modular measurement setup for power and PQ, including the software tool, has been verified and validated. 

For more information, see the project webpage >>