摘要:
A DC current path (4) for DC power transmission comprises a switchable element (1). An inductance (2) is connected in series to the switchable element (1). When an interrupt scenario is detected, a resonance circuit (3) is connected in parallel to the series connection of the switchable element (1) and the inductance (2) for charging a capacitance (32) of the resonance circuit (3). An open state of the switchable element (1) is effected and the resonance circuit (3) is connected in parallel to the switchable element (1). By means of such arrangement and method, very favourable fast interrupt times can be achieved.
摘要:
In one aspect, an apparatus, such as an electrical system (100), is provided. The electrical system can include a pair of conductors (110) across which an arc (122) is sporadically supported, the arc including load current from a load circuit (114). The electrical system can also include an energy source (128) that is separate from the load circuit and configured to selectively charge an electrode assembly (126). The conductors and electrode assembly can be configured such that the arc, when present, will be lengthened or constricted due to the charge on the electrode assembly.
摘要:
A miniaturized direct-current switch with which power loss is reduced when establishing continuity of a direct-current path is provided. A direct-current switch includes an electronic open/close switch 15 inserted in a direct-current path along which a direct current flows in order to make the direct-current path an open circuit or a closed circuit, a parallel mechanical open/close switch 16 connected in parallel to the electronic open/close switch, and a switch control circuit 14 that controls the opening or closing time difference mutually between the parallel mechanical open/close switch 16 and the electronic open/close switch 15, wherein the switch control circuit 14 makes the parallel mechanical open/close switch 16 a closed circuit a predetermined time after the electronic open/close switch 15 has been made a closed circuit.
摘要:
In one aspect, the present invention provides an electromagnetic circuit interrupter 100 for use in a high voltage direct current (DC) aircraft power distribution system. The electromagnetic circuit interrupter 100 comprises a contact mechanism 102 operable to separate first and second electrical contacts 120, 130 by a first predetermined distance d 1 for a predetermined time τ so as to sustain an arc 150 when the contact mechanism 102 is opened. The contact mechanism 102 is further operable to separate the first and second electrical contacts 120, 130 by a second predetermined distance d 2 after the predetermined time τ so as to extinguish the arc 150. The first predetermined distance d 1 is less than said second predetermined distance d 2 . By deliberately sustaining the arc 150 for a relatively long period of time, this aspect of the present invention is particularly useful for extending the operational lifetime of the contacts 120, 130 and thereby of the electromagnetic circuit interrupter 100 itself.
摘要:
Disclosed are an apparatus and method of controlling switch units between a battery pack and a load, and a battery pack and a battery management system comprising the same. The apparatus comprises a memory for storing the turn-off number and order of first and second switch units connecting the battery pack with the load according to current ranges; and a control unit for equalizing the turn-off order of the first switch unit and the second switch unit with reference to the turn-off number and order in a current range corresponding to a magnitude level of discharge current of a battery. Accordingly, the present invention reduces the frequency of breakdown or malfunction of the switch units and increases the using period of the switch units.
摘要:
The invention relates to a battery unit arrangement 1 for high voltage applications. The battery unit arrangement comprises a battery unit 6 i having a battery chassis 2 i and a switching device 5 i . The switching device 5 i comprises switching means 4 i for switching the battery chassis 2 i between two positions P1, P2, a first position P1 connecting the battery chassis 2 i to a pole of the battery unit 6 i and a second position P2 connecting the battery chassis 2 i to a zero potential G. The invention also relates to a connection and disconnection arrangement and methods for operating such connection and disconnection arrangement.
摘要:
The invention relates to an electric direct current network (1) for surface and submarine vessels and for offshore units, having at least one direct current source (2), in particular a battery and/or fuel cell installation, at least one electric consumer (3), e.g. an electric drive motor or a border network, and at least one shut-off device (4) for shutting off a direct current flowing into the direct current network (1). The shut-off device (4) comprises a vacuum switch (5) that is switched in the network and a commutation device (8 or 9), through which a produced electric arc can be turned off when the switch (5) is opened. The shut-off security can be increased such that the vacuum switch (5) comprises a first switch pole (5a) and a second switch pole (5b). The first switch pole (5a) is switched in a current branch (6) from a plus pole of the direct current source (2) to the consumer (3) and the second switch pole (5b) is switched in a current branch (7) from a minus pole of the direct current source (2) to the consumer (3). Both of the switch poles (5a, 5b) are mechanically coupled together and the shut-off device (4) for at least one of the two switch poles (5a, 5b) comprises a commutation device (8 or 9) for turning off an electric arc produced in said switch pole (5a or 5b).
摘要:
Eine Lasttrenner-Anordnung (1) zum Zu- und Abschalten eines DC-Stromes eines DC-Stromkreises in einer Photovoltaikanlage mit einem Halbleiter-Schaltelement (4) zur Vermeidung eines Schaltlichtbogens, soll derart verbessert werden, dass einerseits ein DC-Strom in einer Photovoltaikanlage sicher abzuschalten ist, und zwar nicht nur manuell sondern auch automatisch, und andererseits eine galvanische Trennung in mindestens einer der zwei stromführenden Leitungen des DC-Stromkreises erzielt wird. Dies wird dadurch erreicht, dass eine elektronische Steuereinheit (5) vorhanden ist, die derart ausgeführt ist, dass ein oder mehrere Steuersignale an die Lasttrenner-Anordnung (1) weitergegeben werden, dass ein Zu- oder Abschalten des DC-Stromkreises durch die Steuersignale automatisch bei mindestens einem bestimmten Ereignis, insbesondere bei einem Fehlerfall, erfolgt und dass die Lasttrenner-Anordnung (1) so ausgeführt ist, dass in mindestens einer stromführenden Leitung des DC-Stromkreises im abgeschalteten Zustand eine galvanische Trennung durch einen automatisch durch die Steuereinheit (5) steuerbaren Schaltkontakt besteht.
摘要:
The present invention provides a power distribution system that can be used in naval ships and submarines. The power distribution system includes a first power generation system including at least one power source (13,14,15) for supplying power to a first service distribution system. The first service distribution system includes at least one dc distribution busbar (25) for carrying a distribution voltage and a distribution current and at least one switchboard (16) that includes protective switchgear with contacts. A zonal power distribution sub-system is also provided and includes a zonal power supply unit (23) for supplying power to at least one electrical load and a zonal energy store (22) connected to the at least one switchboard (16) of the first service distribution system for supplying power to the zonal power supply unit (23). The at least one power source (13,14,15) is regulated according to a power source foldback and stabilising characteristic and a power source starting characteristic. The at least one electrical load is regulated according to a load shedding and stabilising characteristic.