METHOD FOR DIAGNOSING POWER TRANSFORMERS Russian patent published in 2004 - IPC

Abstract RU 2237254 C1

FIELD: electric engineering.

SUBSTANCE: method involves measuring values and phase angles of voltages and currents in all transformer windings in two operation modes, recording measured currents and voltage drop values, selecting the first harmonic component of the recorded currents and voltages in windings, determining symmetric components of received currents and voltages. Short-circuit resistance Z_k and loss P_k, idle running current I₀ and loss P₀, active and inductive resistances of each winding are determined. Transformation coefficient K is calculated. Resistance of zero sequence is determined from asymmetric operation mode parameters. The values of Z_k, Z₀, P_k, I₀ and P₀, exceeding some reference values, technical condition and working capacity of transformer is diagnosed.

EFFECT: wide range of functional applications; low cost; high reliability.

4 cl, 3 dwg

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RU 2 237 254 C1

Authors

Aljunov A.N.

Babarushkin V.A.

Bulychev A.V.

Guljaev V.A.

Dates

2004-09-27—Published

2003-01-08—Filed