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Energy metering ICs deliver improved accuracy

Posted: 10 Dec 2009 ?? ?Print Version ?Bookmark and Share

Keywords:energy metering IC? smart meter? power monitoring?

ADI energy metering IC

Analog Devices Inc. rolls four energy metering ICs designed for commercial, industrial and residential smart meters. A smart meter accurately measures how much electricity is consumed or generated, and communicates with the local utility for power monitoring, billing, and other purposes. ADI's new energy metering ICs enable smart electricity meters to deliver improved customer billing accuracy, advanced power quality monitoring, and reduced operating costs for utility companies.

"The devices introduced today are significant in that they are able to measure total active and reactive energy with accuracy and dynamic range exceeding Class 0.2 specifications for energy meters," said Ronn Kliger, energy group director, ADI. "The four new devices are also the first in the industry to measure both reactive energy and active energy with 0.1 percent accuracy. In addition, one device also offers capabilities to measure fundamental-only energies, which is critical for power quality measurements."

ADI's new ADE7878, ADE7868, ADE7858 and ADE7854 high-accuracy energy metering ICs are designed for poly-phase configurations, including three- and four-wire, wye and delta services. The ICs feature 0.1 percent accuracy for both active and reactive energy measurements over a dynamic range of 1000:1!a first for the industry!and 0.2 percent accuracy for both active and reactive energy measurements over a dynamic range of 3000:1. The new products also deliver 0.1 percent accuracy over 1000:1 dynamic range for root-mean square current and voltage measurements.

In addition to per-phase and neutral-energy measurements, the ADE7868 and ADE7878 are able to monitor energy quality parameters such as SAG, peak, period, angle measurements, and phase sequence. Another industry first is the ability of the ADE7868 and ADE7878 to detect various tamper conditions!while continuing to operate properly!reducing field calls and meter troubleshooting time.

ADI recently formed the dedicated energy group headed by Kliger to address the growing technology needs for electric metering, substation automation, and emerging applications, such as solar/wind generation, energy storage, and others. "As a key supplier to power grid equipment manufacturers, ADI has developed a deep understanding of their needs," said Kliger. "We are supporting customers around the globe who are upgrading their offerings to accommodate emerging smart grid systems. ADI recognizes that smart energy grids are more than just smart meters, and we provide solutions across the entire energy generation, transmission, and distribution chain. Along with innovative energy metering ICs, Analog Devices offers RF, power-line carrier communication, power management, and digital signal processing in support of smart grid applications."

Over the next five years, analysts report that up to 200 million smart meters will be installed worldwide fueled by the growing number of smart grid deployments. In China, a $596 billion stimulus program for smart grid expansion is currently underway with 170 million smart meters expected to be deployed within the next three to five years. Eighteen million homes!13 percent of all U.S. households!will get smart meters within three years as part of U.S. government grants to upgrade the country's electric grid. In Europe, Italy and Sweden have already completed advanced metering infrastructure deployments that converted all meters to smart meters. France, Spain, Germany, and the United Kingdom are expected to complete AMI roll-out within the next 10 years.

The ADE7878, ADE7868, ADE7858, and ADE7854 energy metering ICs are sampling now and are housed in a 40-lead LFCSP.

The ADE7878, ADE7868, ADE7858, and ADE7854 feature active power; the ADE7878, ADE7868, and ADE7858 feature reactive power; ADE7878 and ADE7868 feature tamper detect and low power modes; and the ADE7878 also features fundamental-only energy. They are priced, for 1,000-unit quantities, at $7.47, $7.11, $6.76 and $5.34, respectively.

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