Abstract: In order to provide an apparatus for the redundant power supply of at least one load having a first converter, which can be connected to a first AC voltage system via a first connection, a second converter, which can be connected to a second AC voltage system via a second connection, and a DC voltage intermediate circuit, which connects the first converter to the second converter on the DC voltage side, which apparatus makes a redundant power supply possible, the invention proposes that the DC voltage intermediate circuit has at least one load connection for the purpose of supplying power to a load.

Abstract: The invention relates to a wind energy unit, connected to an electrical 3-phase AC network, comprising a generator with a rotor, provided with a regulator device, whereby the regulator device comprises a first and a second regulation unit. A network voltage analyzer is connected to the regulator device and the electrical 3-phase AC network, by means of which a network fault can be recognized, said network fault being defined as a deviation of the network voltage sinor representation from a given set interval, whereby the second regulation unit takes over control from the first regulation unit in the case of a recognized fault and the first regulation performs the control for a non-faulty 3-phase AC network.

Abstract: The invention relates to a wind energy unit, connected to an electrical 3-phase AC network, comprising a generator with a rotor, provided with a regulator device, whereby the regulator device comprises a first and a second regulation unit. A network voltage analyzer is connected to the regulator device and the electrical 3-phase AC network, by means of which a network fault can be recognized, said network fault being defined as a deviation of the network voltage sinor representation from a given set interval, whereby the second regulation unit takes over control from the first regulation unit in the case of a recognized fault and the first regulation performs the control for a non-faulty 3-phase AC network.

Abstract: A method for controlling a static converter connected to a direct-current source. The converter has power conductor switches that can be deactivated and is configured to supply a distribution network with three-phase voltage. The currents flowing through the respective power semiconductor switches are measured, current values respectively assigned to the power semiconductor switches are obtained, the current values are sampled and digitized to obtain digital current values. The latter are checked by a logic in a control unit for the presence of an excess current condition. If no excess current condition is detected, the power semiconductor switches are activated and deactivated with the aid of a nominal operation controller and if an excess current condition is detected, at least the power semiconductor switches with assigned digital current values that fulfill the excess current condition are deactivated after a pulse block has expired.

Abstract: In order to provide an apparatus for the redundant power supply of at least one load having a first converter, which can be connected to a first AC voltage system via a first connection, a second converter, which can be connected to a second AC voltage system via a second connection, and a DC voltage intermediate circuit, which connects the first converter to the second converter on the DC voltage side, which apparatus makes a redundant power supply possible, the invention proposes that the DC voltage intermediate circuit has at least one load connection for the purpose of supplying power to a load.