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ROJAS-CUBIDES, Herbert Enrique; CRUZ-BERNAL, Audrey Soley  and  ROJAS-CUBIDES, Harvey David. Analysis of voltage sag compensation in distribution systems using a multilevel DSTATCOM in ATP/EMTP. Dyna rev.fac.nac.minas [online]. 2015, vol.82, n.192, pp.26-36. ISSN 0012-7353.

Voltage sags are the most common power quality disturbances in electrical facilities. It may cause malfunction in sensitive equipment and process interruption. The distribution static compensator (DSTATCOM) is a device that can compensate voltage sags by injecting reactive power into distribution systems. This paper shows the influence on voltage sags characteristics by the presence of twelve-pulse DSTATCOM in the modified IEEE-13 distribution system. The analysis is performed by means of a random generation of disturbances using a MATLAB routine to identify the critical buses of the test system. Further, the DSTATCOM model taking advantage of the available elements from ATP/EMTP software is described. Simulations show that when DSTATCOM is placed directly to an affected bus it is possible to obtain a complete mitigation of the voltage sag. Finally, the relation between the reactive power injected by DSTATCOM, the type of voltage sag and the location of the affected bus is considered.

Keywords : voltage sags; DSTATCOM; voltage compensation; ATP/EMTP; power quality.

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