Integration of supercapacitor with STATCOM for electric arc furnace flicker mitigation

Abstract

The STATCOM based on voltage source converter is used for voltage regulation in transmission and distribution systems. In this paper, the integration and control of energy storage systems such as supercapacitor into a Distribution system STATCOM (D-STATCOM) with voltage controller is developed to enhance power quality and improve distribution system reliability. This paper develops the control concepts to charge/discharge the supercapacitor by the D-STATCOM, and validates the performance for an integrated D-STATCOM/supercapacitor system for improving distribution system performance. The potential performance improvements are verified by simulation results for rapidly varying arc-furnace loads for voltage flicker mitigation, by supplying fluctuating real power by the D-STATCOM/supercapacitor system.

Phase-Locked Loop (PLL) controller for Distribution Synchronous static compensator (D-STATCOM) to mitigate voltage flicker

“…It is not an easy task to make the attenuation of the voltage flicker caused by the electric arc furnace [12]. Therefore, the deterministic model of arc furnace is used to obtain the dynamic, multi-valued V-I characteristic of EAF load.…”

“…The selection of PI controller parameter based on trials and error in this research cause the delay occur in injection of reactive power component thus slow the control system response to mitigate voltage flicker. Therefore, in order to overcome the previous problem, mitigation techniques explain in [11] and [12]are proposed. These mitigation techniques not only capable to control the reactive power but also capable to control the active power and overcome the slow response of DC link controller with the used of energy storage system connected across the dc capacitor.…”