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The performance of a distance protection scheme along with related supervisory elements is investigated when a shunt connected static synchronous compensator (STATCOM) is tapped to the midpoint of a transmission line. The paper examines responses for different fault types and locations while the STATCOM absorbs reactive power and is being controlled by two different control schemes. An emtp-type model...
This paper provides a study on the impacts of a static synchronous compensator (STATCOM) on a transmission line distance protection. An emtp-type model has been developed to simulate the power system and the STATCOM device. A simulated distance relay model with supervisory elements is used. The effective impedance seen by the distance relay is investigated and evaluated with and without the presence...
This paper analyzes the response of conventional protection schemes (Line current Differential and Mho Distance elements) and the supervisory elements associated with those protective elements in commercial relays for Type 3 (Doubly Fed Induction Generator based) grid integrated wind farms. The response of line protection elements and their supervisory elements are analyzed using real time by hardware-in-the-loop...
The converter controls of the full-converter based Type-IV wind turbine system (WTS) limits the fault current contribution to about 1.1–1.2 per unit (pu). Further, these fault currents are balanced even for unbalanced faults. The absence of significant fault current magnitudes and the lack of negative and zero sequence components in the fault currents poses challenges to the protection of power systems...
Generation connected to the transmission system via inverters (electronically coupled generation) is a growing. Utility protection engineers conventionally use impedance matrix algorithms to determine fault current magnitudes and angles, perform coordination studies, and guide relay settings. In transmission protection studies, it has thus far been common practice to exclude the fault current contributions...
Replacing conventional ac transmission lines with superconducting cables provides performance advantages since superconducting cables have lower series inductance and very low ac resistance. However, the very low resistance will also have an impact on the dynamic response of current transformers (CTs) and on the response of protective relays that process their current measurements. Whenever a short...
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