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This paper provides a comparative study of coordinated voltage control (CVC) strategies for on-load tap-changers (OLTCs) and voltage regulator (VRs) under active and passive network management schemes (ANM and PNM). In PNM scheme, OLTC and VR are restricted to only regulate the secondary bus voltages at fixed set-points, while in ANM scheme, control of the secondary bus voltages within the statutory...
In the short-term timescale, separation between load-driven and generator-driven stability problems is rarely well-defined. Allocation of VSC-based VAR compensation, such as STATCOM, has the ability to boost system voltages in the fault-on condition, thus reducing generator power swing, in addition to circumventing delayed voltage recovery upon fault clearing, thereby reducing the risk of induction...
This paper analyzes an inverter-based microgrid with an induction motor (IM) load and proposes an enhanced method to calculate its critical clearing time (CCT) and a fault recovery strategy to increase its resiliency. The CCT calculation is improved by accounting for the transient electrical phase that deacelerates the IM immediatly after the fault. Results show that our method is able to accurately...
Electric spring (ES) has been reported recently as an alternative device for achieving the grid voltage stability in distribution system using demand side management. ES comprises of six switches in total and injects the voltage in quadrature with the non-critical load current for regulating the PCC voltage to a predefined value. The voltage across the non-critical load decreases/increases as a result...
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