Patent ID: 11881712
Assignee: FLUENCE ENERGY, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An arrangement for compensating for voltage dips in a power supply network, the arrangement comprising:
at least one first converter system, configured to convert between alternating current and direct current; and
a second converter system, configured to convert between alternating current and direct current, wherein direct current link circuits of the at least one first converter system and the second converter system are coupled, wherein the at least one first converter system is connected to a first distribution of alternating current via a first converter switch and the second converter system is connected to a second distribution of alternating current via a second converter switch, and wherein:
the link circuits include two independent line paths through which the first converter system and second converter system are coupled, and each independent line path is directly connected to a battery system for compensating for the voltage dips;
the first converter switch is connected to the power supply network via a first decoupling inductor;
the second converter switch is connected to the power supply network via a second decoupling inductor;
the arrangement is configured to:
maintain the voltage at a critical load by decoupling the power supply network in a fault state from the critical load by:
opening the first decoupling inductor or the second decoupling inductor, and closing both the first converter switch and the second converter switch, or opening both the first decoupling inductor and the second decoupling inductor, and closing the first converter switch, the second converter switch, or a combination thereof;
compensate for a voltage dip at the critical load by maintaining the voltage of the critical load, utilizing the energy stored in the battery system; and
before the first decoupling indicator decouples the first distribution from the power supply network, phase match the first distribution.