Method for determining a droop response profile of an electrical machine connected to an electrical grid

Abstract

A method for determining a droop response profile of a rotating electrical machine supplying electricity to an electrical network having a network frequency varying on either side of a nominal frequency, wherein a measured rotational speed value and droop response parameters are defined. The droop response profile is a graph centered on the coordinates ([X5; Y5]) of an origin point between 99% and 101% of the measured speed value and defined by at least two coordinate points ([X4,Y4], [X0, Y0]) in the case of over-speed, each of the points having as abscissa a speed value as a percentage of the measured speed value, and for ordinates a filtered speed value as a percentage of the measured speed value modulated by at least one of the droop response parameters.

Description

TECHNICAL FIELD[0001]The present application relates generally to rotating machines generating electricity in order to satisfy the electricity requirements of an electrical network and more particularly relates to the control of such rotating machines.BACKGROUND OF THE INVENTION[0002]An electrical network must ensure a constant balance between electrical consumption and electrical generation. Thus, increasing electrical consumption results in a drop in the frequency of the electrical network. Conversely, a drop in electrical consumption results in increasing the frequency of the electrical network.[0003]In order to maintain a constant balance between electrical consumption and generation, the output of the power generating groups may be regulated to maintain the frequency of the electrical network at, for example, around 50 Hz or so. The power output provided by each group of generators producing electricity may be defined by its droop. Specifically, droop may be defined as the rati...

AI Technical Summary

Benefits of technology

The present patent application relates to a method for determining the response profile of a rotating electrical machine supplying electricity to an electrical network. The method involves measuring the speed of rotation of the machine and using a combination of droop or speed control parameters to regulate the machine's speed. The method takes into account various parameters such as the high and low dead bands, the low and high droop, the value of the droop, the filtered speed, the constant offsets of the dead band, and the low and high breaking points. The method allows for a smooth transition between the different modes of the response profile and ensures a stable operation of the machine.

Problems solved by technology

Thus, increasing electrical consumption results in a drop in the frequency of the electrical network.

Conversely, a drop in electrical consumption results in increasing the frequency of the electrical network.

In addition, the use of renewable energy also affects the stability of the electrical grid.

However, the known methods for configuring the droop response of a turbine may not allow for the automatic integration of several functions such as the dead band, the droop of the electrical generating group, the output of the dead band, or limiting the droop response in order to determine a response profile of the turbine to variations in speed.

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