Method of operating a rotor blade adjustment drive
AssigneeSSB Wind Systems GmbH & Co. KG
InventorRalf Hagedorn
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for operating a rotor blade adjustment drive for a wind turbine, in which an electric working load (23) is powered by an electric primary power supply (26) and, in case of a failure of said primary power supply (26), by an electricity accumulator (20). The accumulator (20) is charged by an electric charger (22). Furthermore, the accumulator (20) is temporarily disconnected from the charger (22) at successive intervals, and an electric test load (30) is applied thereto, the resulting electric discharge of the accumulator (20) being observed.
Claims19
Method of operating a rotor-blade pitch controlling drive of a wind turbine, in which
- an electrical working load (23) is supplied with electrical energy by a primary electrical energy supply (26) and, in the event of the latter failing, is supplied with electrical energy by a electrical energy storage means (20),
- characterised in that
- the electrical energy storage means (20) is charged electrically by means of an electrical charger (22),
- and, in successive intervals of time, the energy storage means (20) is temporarily disconnected from the charger (22) and an electrical test load (30) is applied thereto, the electrical discharge of the energy storage means (20) caused thereby being observed.
Method according to one of the preceding claims, characterised in that the charger (22) is supplied with electrical energy by the primary energy supply (26).
Method according to one of the preceding claims, characterised in that the charger (22) controls or regulates the electrical charging current (IL) fed to the energy storage means (20) and/or the electrical charging voltage (UL) applied to the energy storage means, as a function of the state of charge of the energy storage means (20).
Method according to one of the preceding claims, characterised in that the observation of the discharge of the energy storage means (20) comprises the measurement of the electrical voltage (U) which drops across the test load (30) and/or of the electrical current (I) which is fed to the test load (30).
Method according to one of the preceding claims, characterised in that the test load is a power resistor (30).
Method according to one of the preceding claims, characterised in that the energy storage means comprises one or more storage batteries (20).
Method according to one of the preceding claims, characterised in that the working load comprises at least one electric motor (23) which is coupled to at least one rotor-blade (8) and by means of which the rotor-blade (8) is turned on a blade axis (15).
Rotor-blade pitch controlling drive for a wind turbine, having
- an electrical working load (23) which is or can be supplied with electrical energy by a primary energy supply (26),
- having an electrical energy storage means (20) which can be electrically coupled to the working load (23) and by means of which the working load (23) is or can be supplied with electrical energy if the primary energy supply fails (26),
- and having an electrical switching arrangement (34) by means of which the energy storage means (20) is or can be coupled to the working load (23) if the primary energy supply (26) fails,
- characterised in that
- the energy storage means (20) is or can be charged electrically by means of an electrical charger (22) and,
- by means of the switching arrangement (34) and in successive intervals of time, the energy storage means (20) can be disconnected from the charger (22) temporarily and can have an electrical test load (30) applied to it, the electrical discharge of the energy storage means (20) which is caused thereby being, or being able to be, observed by means of an analysing arrangement (32).
Dependencies are inferred from the claim text.