US 11,901,735 B2 · System and method for reducing instability in reactive power command of an inverter-based resource

Abstract

A method for controlling a power system having at least one inverter-based resource connected to an electrical grid includes monitoring, via at least one controller of the at least one inverter-based resource, one or more command signals issued by a system-level controller. The method also includes determining, via the at least one controller of the at least one inverter-based resource, whether the one or more command signals issued by the system-level controller includes oscillatory behavior characteristic of an instability. In response to determining that the one or more command signals issued by the system-level controller includes oscillatory behavior characteristic of the instability, the method includes reducing one or more gains of a volt-var regulator of the system-level controller to reduce the instability.

Claims17

Dependent claims

A method for controlling a power system having at least one inverter-based resource connected to an electrical grid, the method comprising:

monitoring, via at least one controller of the at least one inverter-based resource, one or more command signals issued by a system-level controller;
filtering and analyzing the one or more command signals issued by the system-level controller, wherein filtering the one or more command signals issued by the system-level controller further comprises filtering the one or more command signals issued by the system-level controller via one or more wash-out filters and a lag filter;
determining, via the at least one controller of the at least one inverter-based resource, whether the one or more command signals issued by the system-level controller comprises oscillatory behavior characteristic of an instability;
and
in response to determining that the one or more command signals issued by the system-level controller comprises oscillatory behavior characteristic of the instability, reducing one or more gains of a volt-var regulator of the system-level controller to reduce the instability.

2 more elements

A system for controlling a wind farm having a plurality of wind turbine generators connected to an electrical grid, the system comprising:

a controller configured to perform a plurality of operations, the plurality of operations comprising:
monitoring a reactive power command signal issued by a farm-level controller of the wind farm;
determining whether the reactive power command signal comprises oscillatory behavior characteristic of an instability by comparing a number of times the amplified magnitude crosses zero within the certain time period with a stability threshold and determining the one or more command signals issued by the farm-level controller comprises an oscillatory behavior characteristic of the instability when the number of times the amplified magnitude crosses zero within the certain time period exceeds the stability threshold;
and
in response to determining that the reactive power command signal comprises oscillatory behavior characteristic of the instability, reducing one or more gains of a volt-var regulator of the farm-level controller to reduce the instability.

2 more elements

Dependencies are inferred from the claim text.

System and method for reducing instability in reactive power command of an inverter-based resource

Life of this patent

System and method for reducing instability in reactive power command of an inverter-based resource

Life of this patent

Abstract

Claims17