High-voltage direct-current dual-bus redundant power supply system and switching device thereof
A high-voltage DC, power supply system technology, applied in circuit devices, electrical components, emergency power supply arrangements, etc., can solve the problem of terminal small loads unable to provide redundant power supply solutions that take into account performance and cost, and achieve great practical promotion significance and fast response. , the effect of timely response
Pending Publication Date: 2022-01-14
ZHEJIANG SUPCON TECH
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[0009] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a high-voltage DC dual-bus redundant power supply system and its switching device, which solves the problem of the inability to provide a redundant power supply with both performance and cost for the small load of the terminal in the prior art Program technical issues
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[0047] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0048] figure 1 A schematic diagram of circuit composition of a switching device of a high-voltage DC dual-bus redundant power supply system provided by the present invention, as shown in figure 1 As shown, the switching device 14 of a high-voltage DC dual-bus redundant power supply system proposed by the embodiment of the present invention, the switching device 14 is arranged between the main and auxiliary circuit input power sources and the load, and includes: sequentially connected sampling circuits and signal processing units , AC relays and DC relays.
[0049] Each component in the switching device 14 is further described as follows:
[0050] The sampling circuit is used to collect the real-time current and / or voltage of the main input power supply and t...
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The invention relates to a high-voltage direct-current dual-bus redundant power supply system and a switching device thereof, and the switching device comprises a sampling circuit, a signal processing unit, an alternating-current relay and a direct-current relay which are sequentially connected. The sampling circuit is used for acquiring real-time current and / or voltage of the main and auxiliary input power supplies and transmitting the real-time current and / or voltage to the signal processing unit; the alternating-current relay is used for switching between a main path input power supply and an auxiliary path input power supply; the direct-current relay is used for disconnecting and connecting a load; the signal processing unit controls the direct-current relay to be switched off and controls the alternating-current relay to switch the input power supply of the auxiliary circuit when the voltage of the main circuit is abnormal according to the real-time current and / or voltage control; and when the auxiliary circuit voltage is abnormal or the main circuit returns to normal, the direct-current relay is controlled to be disconnected and the alternating-current relay is controlled to switch the input power supply of the main circuit. According to the invention, two paths of input power supplies can be completely isolated, and small-sized low-cost dual-path direct-current screen redundancy module switching is realized through combination of the alternating-current relay and the direct-current relay.
Description
technical field [0001] The invention relates to the technical field of redundant power supply, in particular to a high-voltage DC dual-bus redundant power supply system and a switching device thereof. Background technique [0002] At present, two sets of DC screens are used redundantly to supply power to the system in electric power, instrument control and other systems. The isolated power supply in the control cabinet is usually also redundantly configured, so two sets of DC screens can be connected separately to complete redundant power supply. However, traditional TI devices (computers, monitors) do not support two redundant inputs, and require external redundancy, and the switching time is usually less than 20ms to ensure that the switching will not cause the TI device to power down and restart. [0003] There are generally three methods for power supply redundancy of high-voltage DC screens as follows: [0004] (1) Diode redundancy: setting redundant diodes will cause ...
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Login to View More IPC IPC(8): H02J9/06
CPCH02J9/061
Inventor 林强涂德慧王文辉戴晨阳
Owner ZHEJIANG SUPCON TECH