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AssigneeALSTOM Renewable Technologies
InventorGuillaume BATS
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This method makes it possible to regulate the power of an energy conversion installation (100) for converting mechanical energy into electrical energy. The installation (100) comprises a machine (1), an alternator (2), a first converter (41), an electrical cable (3) which links the terminals of the alternator (2) to the first converter (41), a second converter (42), means of measurement (8, 41, 43), a control unit (5), the first converter (41) modulating the frequency and the current of the first electrical signal (S2). The method comprises a first prior step in which the value of a first quantity proportional to a reactive power is implemented in the control unit and a main step in which the control unit (5) determines the drive frequency and the drive current on the basis of an error equal to the difference between the first quantity and a second quantity which is both homogeneous to the first quantity, dependent on the reactive power of the first converter (41) and determined on the basis of a measured value of the current of the first electrical signal (S2).
A method for regulating the power of an installation (100) for the conversion of mechanical energy into electrical energy, the installation (100) comprising:
The method as claimed in one of the preceding claims, characterized in that it additionally comprises a first step (2001), prior to the main step (3000), in which the control unit (5) determines:
The method as claimed in one of the preceding claims, characterized in that additionally comprises a second step (2002), prior to the main step (3000), in which the control unit (5) determines a measured value (Q41.i) of the reactive power (Q41) of the first converter (41) from a measured value (I2.i) of the current (I2) of the first electrical signal (S2).
The method as claimed in one of the preceding claims, characterized in that it comprises a second preliminary step (1002) in which at least one constant (Kp, Ki) of a corrector is defined, the output of which is a frequency difference (Δf) and the input of which is the error (ε), in that the main step (3000) comprises a first substep (2006) in which the control unit (5) determines, by means of the corrector, the frequency difference (Δf) as a function of the error (ε) and in that during the main step (3000), the driving frequency (fp) is calculated from the frequency difference (Δf).
The method as claimed in one of the preceding claims, characterized in that it additionally comprises a third preliminary step (1003) in which the user enters into the control unit (5) a frequency ramp (fr) or a fixed frequency (fe) and in that the main step (3000) comprises a second substep (2007) in which the control unit (5) determines the driving frequency (fp) of the first converter (41) by adding the frequency difference (Δf) and the frequency ramp (fr) or the fixed frequency (fe).
The method as claimed in one of the preceding claims, characterized in that it comprises a fourth preliminary step (1004) in which the user enters into the control unit (5) predefined data (D), which correspond in particular to an optimal efficiency of the machine (1), from which data the driving current (Ip) as a function of the driving frequency (fp) and in that the main step (3000) comprises a third substep (2008) in which the control unit (5) determines the driving current (Ip) as a function of the predefined data (D) and of the driving frequency (fp).
An installation (100) for the conversion of mechanical energy into hydraulic energy, the installation (100) comprising:
Dependencies are inferred from the claim text.