TY - GEN

T1 - Compensation of the first natural frequency of inductive medium voltage transformers

AU - Buchhagen, C.

AU - Hofmann, L.

AU - Däumling, H.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - Up till now inductive voltage transformers are only suitable for measuring harmonics if high measurement errors are acceptable. However, as monitoring frequency harmonics becomes more important, the design of inductive voltage transformers needs to be changed in a way to increase its frequency range. The poles and zero points of the frequency response of voltage transformers can be compensated by using different methods. One possibility is to connect an external capacitance to the half winding in order to compensate the first resonance or to connect it to the quarter of the winding in order to compensate the second natural frequency. Another alternative is to change the winding itself for compensating resonance frequencies without using any capacitances. Finally, it is explained how to minimize the transformation error at frequencies up to 9 kHz.

AB - Up till now inductive voltage transformers are only suitable for measuring harmonics if high measurement errors are acceptable. However, as monitoring frequency harmonics becomes more important, the design of inductive voltage transformers needs to be changed in a way to increase its frequency range. The poles and zero points of the frequency response of voltage transformers can be compensated by using different methods. One possibility is to connect an external capacitance to the half winding in order to compensate the first resonance or to connect it to the quarter of the winding in order to compensate the second natural frequency. Another alternative is to change the winding itself for compensating resonance frequencies without using any capacitances. Finally, it is explained how to minimize the transformation error at frequencies up to 9 kHz.

KW - compensation

KW - frequency response

KW - harmonic analysis

KW - potential transformers

KW - transformer windings

KW - first natural frequency compensation

KW - inductive medium voltage transformers

KW - harmonic measurement

KW - high measurement errors

KW - frequency harmonic monitoring

KW - zero points

KW - pole points

KW - resonance compensation

KW - transformer winding

KW - transformation error minimization

KW - Frequency measurement

KW - Resonant frequency

KW - Current measurement

KW - Distortion measurement

KW - Capacitance measurement

KW - Capacitance

KW - Lead

KW - capacitance

KW - instrument transformers

KW - resonance

U2 - 10.1109/PowerCon.2012.6401406

DO - 10.1109/PowerCon.2012.6401406

M3 - Conference contribution

SP - 1

EP - 6

BT - 2012 IEEE International Conference on Power System Technology (POWERCON)

ER -