US 12,255,458 B2
Multi-level medium voltage data center static synchronous compensator (DCSTATCOM) for active and reactive power control of data centers connected with grid energy storage and smart green distributed energy sources
Subrata K. Mondal, South Windsor, CT (US)
Assigned to INERTECH IP LLC, Plano, TX (US)
Filed by INERTECH IP LLC, Plano, TX (US)
Filed on Dec. 22, 2022, as Appl. No. 18/087,303.
Application 18/087,303 is a continuation of application No. 17/202,329, filed on Mar. 15, 2021, granted, now 11,552,474.
Application 17/202,329 is a continuation of application No. 15/715,872, filed on Sep. 26, 2017, granted, now 10,951,032, issued on Mar. 16, 2021.
Application 15/715,872 is a continuation of application No. 14/481,904, filed on Sep. 9, 2014, granted, now 9,774,190, issued on Sep. 26, 2017.
Claims priority of provisional application 61/875,640, filed on Sep. 9, 2013.
Prior Publication US 2023/0318299 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 3/32 (2006.01); H02J 3/18 (2006.01); H02J 7/34 (2006.01); H02M 1/00 (2007.01); H02M 7/483 (2007.01)
CPC H02J 3/32 (2013.01) [H02J 3/1857 (2013.01); H02M 7/483 (2013.01); H02M 7/4837 (2021.05); H02J 7/345 (2013.01); H02M 1/007 (2021.05); Y02E 40/10 (2013.01); Y02E 40/20 (2013.01); Y02E 60/10 (2013.01); Y02E 60/13 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A static synchronous compensator for an Information Technology (IT) electrical load, comprising:
a two-stage direct current (DC)-DC converter coupled to an energy storage device;
a multi-level inverter coupled to the two-stage DC-DC converter and configured to output a medium alternating current (AC) inverter voltage; and
a controller configured to control the medium AC inverter voltage of the multi-level inverter to generate or absorb reactive power such that a power factor is substantially one between a utility supply and a transformer, the controller further configured to charge or discharge the energy storage device by adjusting the angle of the medium AC inverter voltage with respect to a medium AC grid voltage,
wherein a negative terminal of the energy storage device, a negative terminal of the two-stage DC-DC converter, and a negative terminal of the multi-level inverter are electrically coupled to a common negative bus.