distribution transformer impedance
Three-winding Transformer Calculation and Measurement of Impedance: King read the same source: Industrial Technology / General Industrial Technology Research Collection on the analysis of three-winding transformer equivalent circuit of distribution, based on the introduced three-winding impedance and equivalent circuits of distribution transformers parameters of engineering calculation methods. (6 pages) Keywords: three-winding transformer, equivalent circuit, impedance, since the leakage flux, leakage flux articles each recommendation Miners sputum expectoration difficult to implement comprehensive measures for the patients evaluated the effect of diagnosis of occupational diseases recognized institutions and occupational health assessment methods, inspection bodies of workers exposed to occupational hazardous factors in mental health discriminant analysis and validation of Cu-Zn alloy melting the metal fume fever report of poisoning from a mine source of Radiological Protection nuclear meter testing and evaluation of huperzine A on acetylcholine Inhibition of esterase activity of harmful factors in workers exposed to occupational mental health discriminant analysis and validation of coal workers with pneumoconiosis Interleukin -12 and Î³-interferon content in coal workers with pneumoconiosis Interleukin -12 and Î³-interference changes in hormone levels induced by aluminum neuronal mitochondria in the regulation of apoptosis
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Of the winding is D, yn11 connection and winding as Y, yn0 10/0.4kV distribution transformers connected to a single relatively short circumstances, the zero sequence impedance analysis of the situation.
ã€Authorã€‘: Mechanical Industry Design and Research Institute V
ã€‘ ã€DOI: cnki: ISSN :1001-8972 .0.2006-10-071
Preface the inevitable encounter in the distribution design problem is low voltage side of a bus or a single phase distribution line short-circuit problem. As shown: Suppose L1 phase when the transformer secondary short-circuit occurs, Ik for the single-phase short-circuit current. Uf is the phase voltage, Z1, Z2, Z0, respectively positive, negative and zero sequence impedance of the total. Zfp is called phase protection circuit impedance. Since the transformer is the same sequence and negative sequence impedance, which Z1 = Z2, so the size of short-circuit current related primarily to Z0. The impedance transformer and distribution lines that contains the zero sequence impedance, so study the zero sequence impedance of the transformer is necessary. By the principle known in a three phase electrical equilibrium, is a three phase voltage and current balance. That is the same size, the phase angle of the potential difference of 120 Â°, and orderly arrangement of the three vectors. If the balance is broken for some reason it is called is not .
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Home> academic journals> Shanghai University of Engineering Science "-2003 4> Three-winding Transformer Impedance Calculation and Measurement
Calculation of three-winding impedance of distribution transformers and testing Calculation and Measurement of Reactance for Distribution Transformer with Three Windings
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Distribution in the analysis of three-winding transformer equivalent circuit, based on the introduction of the three-winding distribution transformer impedance and equivalent circuit parameters of the engineering calculation method. Of: the same concept of the king: Shanghai University of Engineering Science, Electrical and Electronic Engineering, Shanghai , 200065 Title: Shanghai University of Engineering Science English Title: JOURNAL OF SHANGHAI UNIVERSITY OF ENGINEERING SCIENCE, the volume (of): 2003 17 (4) Key words: TM412 Key words: three-winding transformer equivalent circuit of resistance machines standard classification No.: TM3 TN8 machine standard Key words: Calculation of three-winding equivalent circuit impedance of distribution transformers engineering calculation method based on circuit parameters Fund Project: DOI: References (2) GB / T 6451-1999. Three-phase oil-immersed power transformers and technical requirements of GB 6450-1987. dry type power transformers
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