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In this paper, we investigate an "emergency PWM" method to prevent over-currents in VSC based STATCOM and control transformer magnetic saturation under single line-ground (SLG) power system faults. The 100 MVA 48-pulse VSC topology is based on four series connected transformers on the primary side and each transformer secondary is connected to a 3 Phi, 3-level Neutral Point Connected (NPC)...
The STATCOM (Synchronous Static Compensator) based on voltage source converter (VSC) is used to supply dynamic VARs required during power system faults for voltage support. However, magnetic saturation of transformers used in VSC topology result in over-current and trips of the STATCOM during system faults, when dynamic VARs and voltage support are required the most. In this paper, we propose and...
The STATCOM (synchronous static compensator) operation can be adversely affected due to voltage source converter (VSC) over-currents and trips, during power system faults when its dynamic VAR support functionality is most required strict requirements of STATCOM losses and total system loss penalty preclude the use of PWM (pulse-width modulation) for VSC based STATCOM applications. This constraint...
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