摘要:
It is described a method for starting a wind park (100) comprising plural wind turbines connectable in a collector system (106) connectable to a utility grid, the method comprising: starting at least one first wind turbine (101a, 101b, 101c), each being equipped with an utility grid independent energy supply (103a, 103b, 103c) and a grid forming function (161), to produce electrical energy from wind energy, thereby utilizing the respective grid independent energy supply (103a, 103b, 103c) for starting; performing the grid forming function by the first wind turbine (101a, 101b, 101c) to achieve a reference voltage (Vreference, Vreference,limited) in the collector system; starting at least one second wind turbine (113a, 113b) and/or at least one third wind turbine (115a, 115b, 115c, 115d) to produce energy by conversion of wind energy, thereby utilizing energy provided in the collector system (106) for starting.
摘要:
There is provided an electrical device (10) comprising electrical elements communicating with an integral power supply (12), wherein a power connection means (22) associated with the electrical elements (13, 13′ and 14) is adapted to receive a temporary external source of electrical power such as a battery (24) to allow removal and replacement of the integral power supply without interrupting power to the electrical elements. The integral power supply (12) is adapted to receive an enduring external power source, with a second switch (32) provided to disable connection of the integral power supply (12) to the enduring power source while the battery (24) is connected.
摘要:
Es ist ein Energiekoppler zum Versorgen eines elektrischen Gerätes aus einem Energieversorgungsnetzwerk, insbesondere eines Mittelspannungsnetzwerks, offenbart. Der Energiekoppler (1) weist einen Spannungsteiler auf, der mit einem Versorgungseingang (2) des Energiekopplers (1) verbunden ist und eine erste Impedanz ( C 1 ) und eine in Reihe geschaltete zweite Impedanz ( C 2 ) aufweist. Ein Versorgungsausgang (4) des Energiekopplers (1) ist mit einem Abgriff (3) zwischen der ersten und der zweiten Impedanz ( C 1 , C 2 ) verbunden. Dabei ist der Spannungsteiler dazu ausgebildet ist, aus einer an dem Versorgungseingang (2) anliegenden ersten Spannung ( U 1 ) eine zweite Spannung (U 2 ) zu erzeugen und an dem Versorgungsausgang (4) eine vordefinierte Leistung ( P ) bereitzustellen. Die erste Impedanz ( C 1 ) ist derart dimensioniert, dass bei einer maximal zulässigen Spannung (U max ) am Versorgungsausgang (4) des Energiekopplers (1) zum Erreichen der vordefinierten Leistung ( P ) ein Mindeststrom (Î min ) durch die erste Impedanz ( C 1 ) bereitgestellt werden kann.
摘要:
The invention relates to a low DC voltage supply system (100) for at least one electronic communication device (3; 6) in a broadband over power line communication system, further comprising a broadband over power line coupler including a coupling capacitor (10) that is electrically connected to an average-voltage line (8) of an electrical distribution network. According to the invention, the system (100) includes means (15) for generating a first low DC voltage value on the basis of current-voltage conversion of the leakage current relating to said coupling capacitor (10), said first low DC voltage value being capable of powering at least one active electronic component (13) of said at least one electronic communication device (3; 6).
摘要:
Auxiliary power supply system for supplying electrical energy from a ground-potential regime (2) to a high-voltage regime (3), wherein a plurality of power transmission units are provided, wherein each of the power transmission units comprises: - a power converter (5, 6) for converting electrical power into a transmissible power at the ground-potential regime (2); - an electric power recovering means (8, 10) for generating electric power from the transmissible power at the high-voltage regime; and - a coupling means (7, 9) for coupling the power converter (5, 6) to the respective electric power recovering means (8, 10) to transmit the transmissible power over an electrical potential barrier to the electric power recovering means (8, 10).
摘要:
A current transforming harvester ("CTH") is capable of producing power from a conductor on a preexisting power grid without alteration of the conductor or the preexisting power grid. The CTH includes a current transformer ("CT") that captures energy via magnetic flux from the conductor. The CT is substantially circular and includes two halves called a "split core," which allow the CT to easily attach to the conductor without opening the circuit in which the conductor operates. A clamping mechanism of the CTH may secure the CTH to the conductor via a pair of spring-biased clamp pads. The CTH includes circuitry that converts the magnetic flux energy captured by the CT into electrical energy suitable for consumption by an electrical device.