Smart Grid System With Improved Monitoring And Protection Performance

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Analog Devices recently unveiled its 24-bit data acquisition system-on-chip (SoC) series which specifically designed to improve the performance of protection, monitoring, and power quality measurement equipment used to manage transmission and distribution of electrical energy within smart grid systems. A smart grid is a system which includes a variety of operational and energy measures including smart meters, smart appliances, renewable energy resources, and energy efficiency resources. Electronic power conditioning and control of the production and distribution of electricity are important aspects of the smart grid.

Referring to the press release, “All the three devices of AD777x series offer the industry’s best combination of dynamic range and data throughput and feature eight simultaneous sampling channels that measure the output from current and voltage sensors in three-phase power applications. Each SoC channel achieves 112-dB of dynamic range at 8 kSPS, enabling the consolidation of protection and measurement functions on a single A/D converter channel. The AD777x series also includes an integrated sample rate converter, which simplifies the design challenge associated with making the power quality equipment compliant with the IEC61000-4-30 Class A standard.”

In addition, the AD777x series incorporates a programmable gain amplifier (PGA), on-chip diagnostic features, signal conditioning amplifiers, phase-locked loops (PLLs) and more. As mentioned in the release, the AD7770 enables higher performance and smaller form factor protection relays, while the AD7771 enables power quality measurement equipment to provide early detection of power grid electrical faults. The third SoC in the series, the AD7779, ensures fast power-up in circuit breaker equipment.

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According to the company release, the ICs to be globally available from the start of 2016, however the pricing of these SoCs starts from US$ 5.90 to US$ 7.94, each in 1000 quantities.

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