Low-frequency model for single-phase transformers based on the three-component Preisach model considering deep saturation. (September 2019)

• Record Type: Journal Article
• Authors: Sima, Wenxia; Peng, Daixiao; Yang, Ming; Liu, Yonglai; Duan, Pan; Deng, Jun; Qian, Hai
• Is Part Of: International journal of electrical power & energy systems. Volume 110(2019)
• Page Start: 107
• Page End: 117
• Publication Date: 2019-09
• Subjects: I-Φ Preisach model -- Three-component model -- Deep saturation inductance -- Magnetizing branches -- Transformer transient model; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2019.02.050
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: The Preisach model denoted by I - Φ is determined by the centered cycles method. The combination of the Preisach model and the three-component model is proposed. The composite curve with hysteresis part and deep saturation part is proposed. The inverse dynamic Preisach model is implemented in ATP-EMTP. The transformer model can simulate the dynamic magnetization and deep saturation. Abstract: The transformer model is very important for the transient simulations of power systems. Although a large number of researches have been carried out on the developments and applications of the transformer model, there are still some deficiencies in the study, such as hysteresis and frequency-dependence. This paper proposes an improved transformer model for the calculation of low-frequency transients in power systems. The magnetizing branches are simulated by the composite curves with hysteresis part and deep saturation part. The expression of the inverse static I - Φ Preisach model (ISPM) is derived from the classical Preisach model (CPM). The Preisach distribution function (PDF) is determined by the centered cycles method. Based on the dynamic performance of the grain-oriented electrical steel, the inverse dynamic Preisach model (IDPM) with three components is proposed. The deep saturation inductance can be obtained from the modified AC plus DC test. Then, the modified dual reversible model of the single-phase transformer is developed in ATP-EMTP. At last, the ISPM and IDPM are validated by the comparison of the measured and simulated loops. The steady-state and transient performances of the proposed transformer model are also validated by the comparison of the experiments with simulations including no-load test, DC bias test, and inrush current test.