Method and apparatus for detecting islanding conditions of distributed generator
AssigneeABB Research Ltd.
InventorsAdrian Timbus, Alexandre Oudalov, Gerardo Escobar, Leonardo-Augusto Serpa
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Abstract
A method and apparatus are provided for detecting islanding conditions for distributed generators connected to a grid. The method includes estimating a grid impedance, and inducing, on the basis of the estimated grid impedance, a variation on a value of a first electrical quantity of the grid. The method also includes monitoring a grid response to the variations, and determining islanding conditions on the basis of the monitored response.
Claims10
A method for detecting islanding conditions for a distributed generator connected to a grid, the method comprising:
- estimating a grid impedance;
- inducing a variation on a value of a first electrical quantity of the grid;
- optimizing a magnitude of the induced variation on the basis of the estimated grid impedance to minimize an impact of the induced variation on the grid;
- monitoring a grid response to the variation;
- and
- determining islanding conditions on the basis of the monitored response.
An apparatus for detecting islanding conditions of a distributed generator connected to a grid, the apparatus comprising:
- means for estimating a grid impedance;
- means for inducing a variation on a value of a first electrical quantity of the grid;
- means for optimizing a magnitude of the induced variation on the basis of the estimated grid impedance to minimize an impact of the induced variation on the grid;
- means for monitoring a grid response to the variation;
- and
- means for determining islanding conditions on the basis of the monitored response.
A non-transitory computer-readable recording medium having a computer program recorded thereon that causes a processor of a computer processing device to detect islanding conditions for a distributed generator connected to a grid, the program causing the processor to execute operations comprising:
- estimating a grid impedance;
- inducing a variation on a value of a first electrical quantity of the grid;
- optimizing a magnitude of the induced variation on the basis of the estimated grid impedance to minimize an impact of the induced variation on the grid;
- monitoring a grid response to the variation;
- and
- determining islanding conditions on the basis of the monitored response.
Dependencies are inferred from the claim text.