US 2019/0103747 A1Published application

System and method for controlling cluster-based wind farms

AssigneeGeneral Electric Company

InventorsGovardhan Ganireddy, Rajni Kant Burra, Deepak Raj Sagi

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Abstract

An electrical power system includes a system-level controller and a plurality of clusters of subsystems defining a stator power path and a converter power path for providing power to the power grid. The converter power path includes a partial power transformer. The system further includes a cluster transformer connecting each cluster to the power grid and a plurality of cluster-level controllers communicatively coupled with the system-level controller. Each of the clusters is communicatively coupled with one of the cluster-level controllers. Thus, the system-level controller regulates system-level active and/or reactive power based on required active or reactive power for the system, respectively, and compares the system-level active or reactive power with preferred values thereof. Further, the system-level controller receives feedback signal(s) from the cluster-level controllers, generates cluster-level power command(s) based on the comparison and the feedback signal(s), and sends the cluster-level power commands to the cluster-level controllers.

Claims20

Dependent claims

An electrical power system connected to a power grid, comprising:

a system-level controller;
a plurality of clusters of electrical power subsystems, each of the electrical power subsystems comprising a power converter electrically coupled to a generator having a generator rotor and a generator stator, each of the electrical power subsystems defining a stator power path and a converter power path for providing power to the power grid, the converter power path comprising a partial power transformer;
a cluster transformer connecting each cluster of electrical power subsystems to the power grid;
and,
a plurality of cluster-level controllers communicatively coupled with the system-level controller, each of the clusters of electrical power subsystems communicatively coupled with one of the cluster-level controllers,
the system-level controller configured to perform one or more operations, the one or more operations comprising:
regulating at least one of a system-level active power or a system-level reactive power based on required active power and required reactive power for the electrical power system, respectively;
comparing at least of the system-level active power or the system-level reactive power with preferred values for the system-level active power and the system-level reactive power, respectively;
receiving one or more feedback signals from at least one of the cluster-level controllers;
generating one or more cluster-level power commands based on the comparison and the one or more feedback signals;
and,
sending the one or more cluster-level power commands to each of the cluster-level controllers.

9 more elements

A method for controlling an electrical power system, the electrical power system having a plurality of clusters of electrical power subsystems with a cluster transformer connecting each cluster of electrical power subsystems to a power grid, each of the electrical power subsystems defining a stator power path and a converter power path for providing power to the power grid, the converter power path containing a partial power transformer, the method comprising:

in the event that a system-level controller is offline, selecting one of a plurality of cluster-level controllers as a master controller;
regulating, via the master controller, at least one of a system-level active power or a system-level reactive power based on required active power and required reactive power for the electrical power system, respectively;
comparing, via the master controller, at least of the system-level active power or the system-level reactive power with preferred values for the system-level active power and the system-level reactive power, respectively;
generating, via the master controller, one or more cluster-level power commands based on the comparison and one or more feedback signals;
and,
consecutively sending, via the master controller, the one or more cluster-level power commands to the remaining cluster-level controllers.

3 more elements

Dependencies are inferred from the claim text.