Data acquisition system protects smart grid equipment

Smart grid equipment monitoring is enhanced with the data acquisition system from Analog Devices. Current data acquisition systems often require complex design work and expensive integration that can exceed the needs of the application. The AD7616 data acquisition system supports Class 0.2 measurement accuracy and enables the development of faster, more sensitive and affordable fault detection equipment that helps protection relay operators minimise the high costs associated with repairing and replacing damaged components.

According to the company, it simplifies designs and lowers system costs by reducing the need for multiple parts in high channel count applications by integrating dual simultaneous sampling of 16 channels. It operates from a single 5V supply and can accommodate ±10, ±5, and ±2.5V true bipolar input signals while sampling at throughput rates up to 1Msample/s per channel pair. The device’s input structure eliminates the need for additional external protection circuits or external signal conditioning. On-chip filtering and high input impedance (1MOhm) eliminate the need for driver op-amps and external bipolar supplies. High accuracy on-chip ADCs provide a 90dB SNR, enabling Class 0.2 measurement accuracy compliance and producing reliable, time coherent data. Higher SNR performance of 92dB can be achieved by using the on-chip oversampling mode.

Potential applications are relay protection for low-voltage distribution and feeder terminal units. The device is also suitable for multi-phase motor control and industrial instrumentation applications.


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