Method for dynamic clustering of electrical installations, in particular for rendering ancillary services

Patent metadata

Field	Value
Publication number	US-12237684-B2
Application number	US-202117538111-A
Country	US
Kind code	B2
Filing date	Nov 30, 2021
Priority date	Nov 30, 2020
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

A method for controlling an electrical distribution grid, comprising the following steps: determining at least one variable which describes a state of the electrical distribution grid; combining a plurality of electrical installations, in particular a plurality of regenerative generating units, of the electrical distribution grid to form a virtual power plant, in particular taking into consideration the variable; establishing a control area within the electrical distribution grid for the virtual power plant; establishing a control unit of an electrical installation of the virtual power plant as main control unit; controlling the control area using the main control unit of the virtual power plant.

First claim

The invention claimed is:

1. A method for controlling an electrical distribution grid, the method comprising:
determining at least one variable describing a state of the electrical distribution grid;
combining a plurality of electrical installations of the electrical distribution grid to form a virtual power plant;
establishing a control area within the electrical distribution grid for the virtual power plant;
establishing a controller of an electrical installation of the virtual power plant as main controller; and
controlling the control area using the main controller of the virtual power plant.

2. The method as claimed in claim 1 , wherein the at least one variable comprises at least one item of information from the following list:
whether an (n−1) criterion has been met,
an extension of the electrical distribution grid,
a present total load on the electrical distribution grid; and
a present injection within the electrical distribution grid.

3. The method as claimed in claim 1 , further comprising:
repeating the following steps:
determining the at least one variable describing the state of the electrical distribution grid;
combining the plurality of electrical installations to form the virtual power plant;
establishing the control area within the electrical distribution grid for the virtual power plant; and
controlling the control area using the main controller of the virtual power plant.

4. The method as claimed in claim 1 , wherein the main controller is configured to preset setpoint values for a plurality of control units, a plurality of generating units, a plurality of consumers systems, and/or a plurality of storage systems within the virtual power plant to control the virtual power plant.

5. The method as claimed in claim 1 , wherein the main controller is configured to communicate with a controller of a grid operator or marketer of the electrical distribution grid.

6. The method as claimed in claim 1 , wherein the main controller is configured to process at least one of the following parameters from a list comprising:
operating state of one electrical installation;
availability and prognosis of the ancillary service to be rendered by an electrical installation;
present active and/or reactive power of an electrical installation;
available active power of an electrical installation;
available reactive power of an electrical installation;
prognosis of available power and schedule of the control area; and
SOC (state of charge) value of connected storage systems.

7. The method as claimed in claim 1 , wherein the main controller is configured to preset setpoint values for a plurality of controllers taking into consideration at least one of the following values from a list comprising:
installation power;
capacity utilization by other ancillary services;
priority of other ancillary services;
available active power and/or reserve up to the available power;
grid sensitivity;
grid capacity utilization;
sensitivity at a point to be subjected to closed-loop control;
sensitivity at a location of the virtual power plant; and
prognosis of an available power.

8. The method as claimed in claim 1 , wherein:
the plurality of electrical installations is designed as a plurality of wind power installations or a wind farm, and/or
the combining the plurality of generating units takes place depending on a variable of a control area for which the virtual power plant is responsible.

9. The method as claimed in claim 1 , further comprising:
performing an automatic, topological investigation of the electrical distribution grid with respect to a grid structure, and
performing switching operations within the electrical distribution grid taking into consideration the topological investigation in such a way that a grid state is maintained.

10. The method as claimed in claim 1 , wherein a method for controlling a generator within the electrical distribution grid comprises:
receiving an electrical location of the control area from the main controller;
receiving a setpoint value from the main controller, which presets a setpoint value for an active and/or reactive power to be injected;
determining an electrical distance between the generator and a control node; and
exchanging an electrical active and/or reactive power with the electrical distribution grid depending on the setpoint value and the electrical distance.

Assignees

• Wobben Properties Gmbh

Inventors

• Blaak Isabel
• Brombach Johannes

Classifications

• H02J2101/28

  Wind energy · CPC title

• H02J2101/24

  Photovoltaics · CPC title

• H02J3/06

  Controlling the transfer of power between connected networks; Controlling load sharing between connected networks · CPC title

• G06Q50/06

  Energy or water supply · CPC title

• H02J3/381 Primary

  Dispersed generators · CPC title