Effects of unsymmetrical voltage sags on industrial adjustable speed drives

Petronijević, Milutin; Mitrović, Nebojša N.; Kostić, Vojkan; Banković, Bojan

doi:10.2298/sjee0903495p

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2010

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“…Adjustable-speed drives (ASD) are widely used in both industrial and commercial applications as the most versatile and efficient means of achieving motion control, nevertheless, since ASD are electronically based, they are very sensitive to voltage dips, especially unsymmetrical, and power disturbances causing unexpected protection trip in the drive. These trips may be related to [3,4]: -Failure of low voltage dc bus (see Fig. 2).…”

Section: Introductionmentioning

confidence: 99%

Impact of ASD settings in its LVRT behaviour

et al. 2010

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A common matter of concern in industrial installations is that adjustable-speed drives (ASD) trip due to voltage sags. ASD manufacturers are including more and more in these devices settings related to control strategies (e.g. allowable DC voltage levels, etc) in order to improve their Low Voltage Ride Through (LVRT). These settings must be carefully adjusted in each installation in order to prevent any interference with the process where ASDs are used.In this paper, a method to establish the setting values to achieve a determined LVRT level has been done. A voltage sag generator developed by the part of the authors has been used to test several setting values and its impact on the process.Two commercial ASD installed in a factory were used during tests.

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Section: Introductionmentioning

confidence: 99%