2001 Hydro Québec
Installation

A Wide Band High-Accuracy SF6-Free Optical Voltage Transformer

(As presented at the IEEE 2002 PES Winter Power Meeting - Optical Sensor Conference)

In comparison to conventional instrument transformers, optical sensors typically have wider bandwidth, wider dynamic range & maintain high accuracy over a wide temperature range. A single sensor may be used for a number of applications. This paper includes test results & highlights of a specific installation Hydro Québec.

(Above) TCFs, RCFs, & phase errors for a 138 kV NXVT. Download full paper for further details...

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Collected Data Enhances System Performance

Data collected throughout a utility's transmission & distribution system can be extremely valuable.

(Reprinted from Electric Energy, Feb 2002)
Once data is retrieved it may be used in a variety of different ways related to system performance. First, a utility’s control center needs the real-time data in order to manage their system’s generation, transmission, distribution & loading. If the data has been preprocessed into useful information (such as transformer overload monitoring or fault location information), system real-time performance can be handled more efficiently & effectively. Second, system performance groups require trend, system stability & transient records to review how the system performed during a period of system stress.

The TESLA Disturbance Fault Recorder

As suggested above, fault recorders can enhance the performance of your systems. TESLA features multiframe transient fault, dynamic swing & trend recording with a wide range of calculated channels & triggers. Unique wide area monitoring ability & DC inputs are available.