Title :
In-situ calibration of high-voltage three-phase transformer loss measuring systems
Author :
So, Eddy ; Hanique, Ernst
Author_Institution :
Nat. Res. Council of Canada, Ottawa, Ont., Canada
fDate :
4/1/2001 12:00:00 AM
Abstract :
The application of a computer-controlled current-comparator-based load loss standard to the in-situ calibration of two different types of high-voltage three-phase transformer loss measuring systems at SMIT Transformers is described. The load loss standard simulates a high-voltage inductive load at power frequencies which can provide load currents up to 2000 A at any power factor with a resolution of 1×10-6, and at test voltages up to 200 kV. It basically provides a known and stable power loss or reference power determined by the test voltage and the power factor setting, to the transformer loss measuring system, such that its accuracy can be characterized over different voltage, current, and power factor ranges
Keywords :
calibration; computerised control; current transformers; electric current measurement; high-voltage techniques; loss measurement; measurement standards; potential transformers; power engineering computing; power transformer testing; voltage dividers; voltage measurement; 200 kV; 2000 A; HV three-phase transformer loss measuring systems; active voltage dividers; computer-controlled; current transformers; current-comparator-based load loss standard; high-voltage inductive load; in-situ calibration; power factor setting; reference power; stable power loss; test voltage; traceability; uncertainty; voltage transformer; Application software; Calibration; Computational modeling; Computer applications; Current measurement; Frequency; Loss measurement; Measurement standards; Phase transformers; Reactive power;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
