Modeling and experimental validation of a dynamic regional saturation J-A model for protective current transformer

Duan, Jiandong; Li, Hao; Lei, Yang

doi:10.1016/j.ijepes.2018.08.029

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…The novel function with additional parameters (19) provides improved flexibility to trace a B-H loop with a better overall shape. Additionally, a dynamic regional saturation model for protective CTs based on dynamic J-A theory was proposed in [27]. The relevant parameters used to simulate a CT are tabulated in table 3.…”

Section: Test System To Implement Ekf Algorithmmentioning

confidence: 99%

Improving distance relay performance for heavily distorted voltage and current by accurate signal reconstruction using extended Kalman filter

NAIR¹,

DEVIKA²,

Raj³

et al. 2023

Meas. Sci. Technol.

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Distance relay plays a pivotal role in the detection of faults and subsequent isolation in transmission lines. However, severe distortion in the measured voltage and current waveforms (such as due to Current Transformer (CT) saturation), affects their performance. This paper focuses on a compensation method for signal reconstruction using Extended Kalman Filter (EKF) algorithm to improve relay functioning, enhancing the safety of transmission lines. The proposed fault detection scheme was tested extensively by running simulations using PSCAD and MATLAB for different types of faults at various distances and CT burden. The CT model in PSCAD was developed based on the Jiles-Atherton phenomenological theory in order to closely resemble a real-time CT with its saturation effects. The simulation results show that the proposed method is highly efficient in determining the exact fault point with improved zone approaching times even with measured signals having high noise and harmonic content. In cases where the conventional relay fails to detect the fault in the correct zone, the compensated data from the proposed method accurately detects the zone. Hardware experimental tests were carried out to further verify the effectiveness of the scheme in real-time, where the EKF based algorithm was implemented using a DSP-based microcontroller

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Section: Test System To Implement Ekf Algorithmmentioning

confidence: 99%

Improving distance relay performance for heavily distorted voltage and current by accurate signal reconstruction using extended Kalman filter

NAIR¹,

DEVIKA²,

Raj³

et al. 2023

Meas. Sci. Technol.

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“…The Jiles-Atherton model (JA-model) [21][22][23] has been widely used to model stress-induced magnetic behavior, and its non-hysteresis magnetization Mis described as:…”

Section: Mechanism Of Mfl Caused By Stressmentioning

confidence: 99%

A stress defect state measurement method based on low-frequency ACMFL excitation and Hall sensor array collection

Zhang

Jian

et al. 2023

Meas. Sci. Technol.

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The safety testing of ferromagnetic materials, which are the main materials for various machines and equipment, is particularly important. Stress concentration zone (stress defects) cause stress corrosion of ferromagnetic materials, and it also has the possible to cause direct damage to ferromagnetic materials. Estimation of stress sources state using electromagnetic nondestructive measurement method s is a critical and difficult problem. In this paper, a visual and intelligent identification method of stress defects in ferromagnetic materials by low frequency AC magnetic flux leakage (ACMFL) technique is proposed. A new three-point compression experiment was designed in this paper. Time-difference vision is established to analyze the ACMFL signal caused by stress defects. A visual transformed convolutional neural network (vt-CNN) deep learning algorithm has been proposed to identify grayscale patterns pre-processed by the time-difference vision. The results show that the method proposed in this paper elucidates the relationship between the time-difference vision of a stress defect and the stress source state of the mechanical stress. Our proposed method allows to analyze the pressure indenter size of the pressure source of stress defects.

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“…Applicable for stationary calculations. To calculate the dynamics of transient processes, the complicating of the calculation model is required, as shown in [7,8].…”

Section: W W I =mentioning

confidence: 99%

The calculate of current transformers with combined magnetic cores

Batrashov

Stepanskaya

2021

E3S Web Conf.

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The manufacture of current transformers is associated with many design constraints, which include the restricted dimensions of its installation places, requirements for the accuracy class, as well as the limitation on the safety factor or the minimum factor of the accuracy limit factor. In a design sense of current transformers, these requirements are contradictory, which resulting in a flexible approach to the manufacture of current transformers. The use of combined magnetic cores can be referred to one of these areas, in other words magnetic cores consisting of materials with different magnetic properties, which allows to obtain unique magnetic properties that are inaccessible when using magnetic cores of the same type (material), thus providing a rational model of production. The article presents a feature of calculating of current transformer with combined magnetic cores.

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Modeling and experimental validation of a dynamic regional saturation J-A model for protective current transformer

Cited by 10 publications

References 17 publications

Improving distance relay performance for heavily distorted voltage and current by accurate signal reconstruction using extended Kalman filter

Improving distance relay performance for heavily distorted voltage and current by accurate signal reconstruction using extended Kalman filter

A stress defect state measurement method based on low-frequency ACMFL excitation and Hall sensor array collection

The calculate of current transformers with combined magnetic cores

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