Abstract:
The invention relates to a system for generating electric energy from renewable energy sources. The system includes a plurality of generator aggregates (4a-6c) arranged in the sea and a plurality of switchgears (1 a-1 c) arranged in the sea. Each switchgear (1 a-1 c) is connected to a plurality of the generator aggregates (4a-6c). According to the invention the system includes a plurality of primary intermediate stations (17a-17c). The system also includes at least one secondary intermediate station (19). Each primary intermediate station (17a-17c) is connected to a plurality of the switchgears and each secondary intermediate station (19) is connected to a plurality of the primary intermediate stations (17a-17c). The secondary intermediate station is also connected to a land based electric network. Switching means (192) is present for allowing selective connection to various locations (193,194,195) in the electric network. The invention also relates to an electric network and to a method for supplying energy to an electric network.
Abstract:
A method and a controller for continuously operating a plurality of electric energy generating machines during a high voltage condition at a point of common coupling of the plurality of electric energy generating machines are described. The method comprises a) sensing (102) a voltage level at the point of common coupling exceeding a permitted voltage level; b) curtailing (104) an active power output of the plurality of electric energy generating machines in such a manner that a reactive capability of the plurality of electric energy generating machines is increased; c) establishing (106) a set point of an electric quantity being present at the point of common coupling in such a manner that a reactive electric component providable by the plurality of electric energy generating machines is increased; and d) controlling (108) at least one of the plurality of electric energy generating machines based on the established set point of the electric quantity in such a manner that the high voltage condition at the point of common coupling is at least partially remedied.
Abstract:
An apparatus for collecting energy in connection with a sheave system (1 -80) in a hoisting apparatus (1-20) provided with a sheave system. The apparatus comprises at least one generator (2-50) comprising a rotor (2-60) and at least one stator (2-80). The rotor (2-60) is connected rigidly to a sheave (2-21, 2-22) of the sheave system (1-80), and said at least one stator is connected rigidly to the sheave system such that when the load of the hoisting apparatus is rising or lowering, said at least one sheave (2-21, 2-22) rotates, whereby the rotor (2-60) rotates simultaneously but the stator (2-80) does not rotate, whereby electric energy is induced in the stator. The apparatus further comprises electric energy storage, means for modifying induced electric energy and storing it in energy storage; and means for supplying energy from the energy storage to at least one consumption device (295). The consumption device may be, for example, a working lamp, sensor, measuring device, communications device, signal device, charging plug or a combination of these mounted in connection with the sheave system.
Abstract:
Die vorliegende Erfindung umfasst ein Verfahren zum Einspeisen elektrischer Leistung in ein elektrisches Netz (10) wobei die Einspeisung mittels wenigstens einer Windenergieanlage (32) mit einer ersten Einspeiseanordnung (WP1, WP2) an einem Einspeisepunkt in das elektrische Netz (10) erfolgt und die Einspeisung abhängig von elektrischen Grössen im Netz (10) erfolgt und Messwerte der elektrischen Grössen bzw. Messwerte zum Bestimmen der elektrischen Grössen zu Messzeitpunkten in vorbestimmten Zeitabständen erfasst werden und wobei die Messzeitpunkte auf ein externes, ausserhalb der ersten Einspeiseanordnung verfügbares Zeitsignal synchronisiert werden.
Abstract:
A DC/AC converter for converting DC power of a number of inductively connected generators (120) into power grid conformal AC power for feeding into a connected power grid with a number of phases, each phase (L, L1, L2, L3) being assigned to a generator, comprises an intermediate circuit with intermediate circuit capacitor (100, 110) and a positive and a negative intermediate circuit connection (170, 175) and for each phase (L, L1, L2, L3) of the power grid (740)a bridge (160). Each bridge (160) comprises a first switch (211, 231) that forms a switchable connecting path between the positive intermediate circuit connection (170) and a phase terminal (180), a second switch (212, 232) that forms a switchable connecting path between a positive generator terminal (150) of the generator (120) assigned to the phase and the phase terminal(180), a third switch (213,233) that forms a switchable connecting path between a negative generator terminal (155) of the generator (120) assigned to the phase and the phase terminal (180), and a fourth switch (214, 234) that forms a switchable connecting path between the negative intermediate circuit connection (175) and the phase terminal (180). Furthermore, the bridge (160) comprises a first diode (221) that connects the positive intermediate circuit connection (170) to the positive generator terminal (150) of the generator (120) assigned to the phase, and a fourth diode (224) that connects the negative intermediate circuit connection (175) to the negative generator terminal (155) of the generator (120) assigned to the phase. An operating method for a DC/AC converter is likewise disclosed. The DC/AC converter can be part of a power generation plant.
Abstract:
The invention relates to a system for the dynamic regulation of a regenerative energy generation installation comprising a plurality of energy generation units. Said system has a signal input for receiving a pre-determined nominal value (Psoll), a measuring device for measuring an actual value (Pist) on an output of the energy generation installation, and a regulating device for regulating the energy generation units based on the nominal value (Psoll) and the measured actual value (Pist).
Abstract:
Improved power distribution architectures for the uniform delivery of single frequency RF power to plasma chambers are disclosed. The architectures include feeding into multiple points across a single large-area electrode, multiple electrodes driving a common plasma discharge as well as multiple coils driving a common plasma discharge. The time-averaged electromagnetic field distribution may be controlled using an array of generator and match (delivery) systems, one of which may be capable of absorbing net power and presenting controlled impedance to the plasma load. In variations, an M+N port network (with M the number of generators and N the number of feed points on the electrode) may be implemented to level the power required from each generator while maintaining a desired field strength distribution.