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Reference design offers improved grid data management

Posted: 19 May 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Maxim Integrated Products? power grid? reference design? AFE?

Maxim Integrated Products Inc. has announced a subsystem reference design that allows utilities and infrastructure providers to simultaneously and accurately measure distributed power grid data. According to the company, Petaluma is tuned to the 50-60Hz signal to match power grids around the world. The simultaneous sampling of three phases is done with low power consumption in the 1W range.

Utility organisations worldwide are deploying more robust applications that require highly accurate distributed grid status data to leverage distributed generation technologies such as solar and wind power. Voltage and current measurements must be gathered simultaneously for all lines, so the utility can understand the timing among phases and ensure maximum uptime across the grid. Petaluma is a high-speed, simultaneous-sampling, 8-channel analog input front-end (AFE) that monitors grid data simultaneously from all phases, so grid managers can optimise their distribution automation signal chain.

Petaluma reference design

Its high-speed sample rate (250ksps per channel) comes with 16bit accuracy, allowing for quick responses to grid fault conditions. Petaluma performs well in any application that requires multiple simultaneous sampling of analog inputs, such as multiphase motor control and industrial vibration sensing, to accurately calculate instantaneous power consumption.

The 16bit ADC and external voltage reference claim to provide the highest possible accuracy of 0.02 per cent and a 3ppm/°C maximum temperature coefficient. The subsystem also includes eight high-speed 250ksps simultaneous-sampling analog input channels that accept ±10V input signals.

Pricing is available upon request.

Petaluma block diagram

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