Synchrophasors added to power quality meter

23rd April 2015

Barney Scott

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Datasheet

Schweitzer has added synchrophasors to its SEL-735 Power Quality and Revenue Meter, enabling users to collect real-time measurements of electrical quantities from every SEL-735 Meter across their system. They can use synchrophasor data to perform wide-area control, validate system models, determine stability margins, maximise stable system loading, detect islanding, record system-wide disturbances and visualise dynamic system responses.

The SEL-735 supports the latest version of the synchrophasor standard, IEEE C37.118-2011 (as amended by IEEE C37.118.1a-2014) Class P, which makes it suitable for applications requiring fast response times under dynamic conditions. When used as a Phasor Measurement Unit (PMU), this SEL meter provides synchrophasor data for frequency, phase, positive sequence components, four user-defined analogue quantities and 14 digital status bits.

The SEL-735 features full IEC 61000-4-30 power quality compliance along with industry-leading accuracy, ease-of-use, reliability and price. In addition, the combination of instrumentation transformer compensation and IEEE C37.118 is unique to SEL and the SEL-735 Meter. Customers can choose to correct delays and errors on each phase to achieve high system accuracy, even when using protection-grade transformers.

“The SEL-735 is designed as an economical yet high-performance meter,” said Travis Mooney, R&D Manager, SEL. “It passes accuracy requirements three times as stringent as the ANSI C12.20 Accuracy Class 0.2 standard. And, with three levels of power quality monitoring, it’s easy to tailor the SEL-735 to virtually any application or budget.”

The SEL-735 equipped with an Ethernet port and synchrophasor functionality is available now for $1,575.