Voltages and Currents in Output Circuits of Three-Phase Diode Rectifiers

Piotr Olszowiec

Abstract


Operating parameters such as voltages, leakage, and ground fault currents are decisive for a correct and safe operation of low-voltage unearthed networks with diode rectifiers. The knowledge of the maximum possible values of these parameters is necessary for correct assessment of numerous hazards. So far, no simple methods for determining the highest levels of these parameters in AC/DC IT three-phase networks have been available. The paper presents a new approach to the evaluation of the variation ranges of diode rectifiers’ voltages and currents with the help of Mathcad. 


Keywords:
Diode rectifiers; ground fault current; insulation resistance; leakage current; output voltage; three-phase networks

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References


P. Olszowiec, “Insulation Measurement and Supervision in Live AC and DC Unearthed Systems,” Lecture Notes in Electrical Engineering, 2013. https://doi.org/10.1007/978-3-642-29755-7

W. Hofheinz, Protective Measures with Insulation Monitoring, VDEVerlag, 1998.

P. Olszowiec, “Evaluation of Variation Ranges of Phase Voltages and Ground Currents in Three-Phase Unearthed Networks With Diode Rectifiers,” Power and Electrical Engineering, vol. 33, pp. 51–55, 2016. https://doi.org/10.7250/pee.2016.010

P. Olszowiec, “Unconventional Methods of Analyzing Diode Rectifiers with Asymmetrical Supply,” Computational Problems of Electrical Engineering, vol. 4, no. 2, pp. 33–36, 2014

P. Olszowiec, „O wyznaczaniu napięć trójfazowych prostowników diodowych,” Wiadomości Elektrotechniczne, vol. 10, pp. 20–21, 2015.




DOI: 10.7250/pee.2017.005

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