1133A의 특징

• Synchronized via GPS
• Revenue Accuracy: 0.025%
• Power Quality: Harmonics, Flicker, Interruptions
• Phasor Measurements for Stability & Flow Analysis
• System Time & Frequency Deviation
• Internal Data/Event Logging
  

Revenue Metering

With utility deregulation, accurate energy measurement is increasingly important.
For the first time, Arbiter Systems®, Inc. combines state-of-the-art measurement techniques, proprietary EnergyDSA™ technology, and the accurate, cost-effective time synchronization of our precision GPS clock products in the Model 1133A Power Sentinel™ multi-function measurement unit.

The Model 1133A brings laboratory performance to the substation, delivering unprecedented revenue accuracy of 0.025% under most conditions.
Compare this to traditional watt-hour meters which are limited to an accuracy of no better than 0.1% in the lab, with increasing errors as conditions depart from the ideal.

The Model 1133A measures revenue more accurately than any meter ever before.
The difference between 0.025% and 0.1% is surprising. With many transmission lines wheeling thousands of megawatts of power, the difference in accuracy of 0.075% translates to hundreds of thousands of dollars over a year's time.
Even at lower power levels, improved accuracy yields significant revenue enhancement.

Synchronization

A built-in Global Positioning System (GPS) satellite receiver synchronizes your Model 1133A within 1 μs of Coordinated Universal Time (UTC), which may also be converted to your local time. With synchronization, revenue data can be accumulated in time slots as short as one minute. Other substation equipment, such as digital fault recorders, solid-state relays, remote terminal units, and programmable logic controllers, may be synchronized with the standard IRIG-B unmodulated timecode output. This output has sufficient power to drive numerous loads, for example, 40 Schweitzer™ SEL-321 relays.

Technology

Arbiter Systems' many years of experience making accurate measurements of ac signals and providing state-of-the-art timing equipment lies at the heart of the Model 1133A Power Sentinel™ revolutionary performance.

For example, built-in, real-time autocalibration eliminates many sources of error which would otherwise degrade accuracy. This process measures the output of an internal calibration source, time-multiplexed along with the input signals. A complete set of calibration measurements is executed once each second.
By passing the calibration signal through the same measurement circuits as the input signals, drift in component values, temperature sensitivities, and many other errors are completely removed

All of the accuracy in the world means nothing if the resulting signal cannot be processed with equal or better performance. Our proprietary EnergyDSA™ Digital Signal Analysis, an optimized version of the PowerDSA™ analysis developed over the last decade and in use in our Model 931A Power System Analyzer for several years, delivers this performance.

We have optimized EnergyDSA™ analysis for the specific requirements of revenue metering and on-line power analysis: speed, accuracy and low cost. Our EnergyDSA™ algorithms measure signals with accuracies characterized not in percent, but in parts per million.