Rotating phasor-based algorithm for the identification of inrush currents of three-phase transformers

Chai, Jimin; Zheng, Yongjun; Pan, Shuyan

doi:10.1016/j.epsr.2022.108936

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…The sign of harmonic phases for the current waveforms in Figure 5a does not remain constant all the time and follows a different pattern in different time intervals. For example, in the time interval 𝑡1, the current waveform related to transformer T1 TABLE 4 The harmonic signs for different core materials for five time intervals are shown in Figure 5a.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…It may occur due to the connection/disconnection of some equipment or facilities in the power grid, such as switching of power transformers, compensating reactors, capacitive banks, or sizable loads [1][2][3]. There are different types of inrush currents for a power transformer including energizing, sympathetic, and recovery inrush currents [4,5]. The saturation of the power transformer core is the main reason for all types of inrush currents [6,7].…”

Section: Introductionmentioning

confidence: 99%

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An innovative harmonic‐based approach for inrush current detection in low‐loss transformers

Sanati,

Ahmadi,

Sanaye‐Pasand

2024

IET Generation Trans & Dist

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Transformer inrush current occurs due to the saturation of magnetic core. The magnetic characteristic of the core directly affects the inrush current waveform. Second harmonic and higher‐order harmonics are present in the inrush harmonic spectrum. A harmonic‐based method analysing the amplitude and phase of different harmonics is presented here. Based on the proposed method, the differences between the harmonic spectrum of new low‐loss and previous‐generation materials are investigated. Then, using the patterns of 1st to 10th harmonic phases, a novel method for inrush current detection is proposed. In the proposed method, possible patterns for the harmonic phases related to the inrush current are specified. The harmonic phases are compared with those specified patterns. In the case of matching, the inrush current condition is detected. To evaluate the theoretical principles, simulations are performed, also, the proposed method is applied to the field data to assess the practical performance, and results are presented.

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Section: Simulation Resultsmentioning

confidence: 99%