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Detection and correction of current transformer saturation effects in secondary current signals
2009 IEEE Power & Energy Society General Meeting, 2009Ideally a current transformer transduces the primary current linearly. In reality the transmission behaviour is non-linear at very high primary currents or at high burden i. e. the current transformer saturates. If saturation takes place the measured secondary current signals are distorted so that protection devices operate delayed or blocked (e.
Philipp Stachel, Peter Schegner
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A Current Transformer Saturation Detection Algorithm for Use in Current Differential Protection
2010 International Conference on Electrical and Control Engineering, 2010A current transformer (CT) saturation detection algorithm for use in current differential protection is described. The algorithm evaluates the start and end of each CT saturation period using the "largest modulus series"; this is derived from the third order difference function applied to the secondary current.
Li Yang +3 more
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A current sourced inverter with saturating output transformer
1981 IEEE Power Electronics Specialists Conference, 1981A current sourced inverter with saturating output transformer offers advantages where a DC converter must regulate an isolated output voltage over a 10 to 1 range of input voltage in a dense package capable of 300 watt output.
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Quantitative Analysis of Saturation of Measurement Current Transformer by Direct Current Bias
2019 IEEE 3rd International Conference on Green Energy and Applications (ICGEA), 2019The DC bias caused by single pole-ground mode or bipolar unbalanced mode of HVDC transmission or geomagnetic induced current phenomenon may lead to the measuring CT saturation, which may affect the measurement performance. Therefore, it is necessary to evaluate the saturation degree of the CT.
Rundong Lv, Ke Zhu
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IEEE Transactions on Power Delivery, 2010
A large primary current and DC component in a current transformer (CT) will result in a distorted secondary current if the CT becomes saturated. It may lead to a malfunction in the protective relay because of a smaller rms current resulting from the distorted current during fault occurrence.
null Ying-Yi Hong, null Da-Wei Wei
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A large primary current and DC component in a current transformer (CT) will result in a distorted secondary current if the CT becomes saturated. It may lead to a malfunction in the protective relay because of a smaller rms current resulting from the distorted current during fault occurrence.
null Ying-Yi Hong, null Da-Wei Wei
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Mitigation of Transformer Saturation Due To Neutral HVDC Currents
2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific, 2005This paper introduces a new technique that provides an efficient mitigation solution to transformer saturation caused by HVDC neutral currents. This solution is not dependent or at most weakly dependent on the network configuration to ensure that the transformer windings dc currents are always below the safe values.
F.P. Dawalibi, Y. Li, C. Li, J. Liu
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Parallel inductor reduces transient saturation of current transformers
Proceedings of the Institution of Electrical Engineers, 1970A method of reducing the transient saturation of current transformers by connecting an external parallel inductor is presented. This combination behaves as a current transformer with an air gap and has most of its advantages. The effect of resistance in the inductor is brought out.
S.V.N. Sarma, A. Wiszniewski
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An Efficient Compensation Algorithm for Current Transformer Saturation Effects
IEEE Transactions on Power Delivery, 2004Current transformer (CT) saturation leads to inaccurate current measurement and, therefore, may cause malfunction of protective relays and control devices that use currents as input signals. This paper introduces an efficient compensation algorithm capable of converting from a sampled current waveform that is distorted by CT saturation to a compensated
J. Pan, K. Vu, Y. Hu
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A new efficient algorithm to detect Current Transformer saturation
2016 IEEE Power and Energy Society General Meeting (PESGM), 2016This paper presents an algorithm to precisely detect the saturation of Current Transformers (CTs). The algorithm is based on first difference of magnitudes of Lissajous Curve. These Lissajous curves are generated using secondary current signal and its first derivative.
Kanhaiya Kumar +2 more
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Magnetic saturation and inrush current in transformers
2008The project aims to find a new method, used to discriminate between inrush current and short circuit current based on the waveform discrimination using neural network which is different from the conventional method using the ratio of second harmonic current to differential current.
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