PLC-based high-power special power failure interlock protection device
A protection device and special power supply technology, applied in the field of electrical technology and power electronics, to reduce the incidence of accidents, ensure safety, and facilitate maintenance
Pending Publication Date: 2020-02-28
TIANSHUI ELECTRIC DRIVE RES INST
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem of fault chain protection of high-power particle accelerator special power supply in the prior art, and provide a PLC-based high-power special power supply fault chain protection that enables faults to be transmitted between power sources in the form of light device
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] Such as Figure 1-3 As shown, a PLC-based high-power special power supply fault interlock protection device includes a main controller 1 and a plurality of PLCs 2 connected to the main controller 1 , and the PLC 2 is connected to the main controller through a slave controller 7 . The fault input point of PLC2 is connected with a fault receiving circuit 3, the fault reset circuit 6 is connected with the reset output point of PLC2, the other end of the fault receiving circuit 3 is connected with an external fault transmission optical fiber, and the power interface of the fault receiving circuit 3 is connected with a voltage conversion circuit , the voltage conversion circuit is connected with a power indicator circuit, and the power indicator circuit is connected with the 24V power supply; the fault output point of PLC2 is connected with t...
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The invention belongs to the technical fields of electrics and power electronics, and discloses a PLC-based high-power special power failure interlock protection device to solve the problem of the power failure interlock protection in the prior art. The device includes a main controller and PLC. The fault input point of the PLC is connected to a fault receiving circuit. A fault reset circuit is connected to the reset output point of the PLC. The other end of the fault receiving circuit is connected to an external fault transmission fiber. The power interface of the fault receiving circuit is connected to a voltage conversion circuit. The voltage conversion circuit is connected to a power indication circuit. The power indication circuit is connected to a 24V power supply. The fault output point of the PLC is connected with a fault transmitting circuit. A fault holding circuit is connected between the fault receiving circuit and the fault transmitting circuit. The device transmits faultinformation between individual power supplies in the form of light by using optical fibers, isolates electromagnetic interference between the power supplies, and further improves the reliability of the power system operation.
Description
technical field [0001] The invention relates to the fields of electrical technology and power electronics technology, in particular to a PLC-based high-power special power supply failure chain protection device. Background technique [0002] With the continuous development of scientific research and medical particle accelerator technology, the requirements for accelerator power supply are getting higher and higher. This kind of power supply has the characteristics of high precision, large capacity, small ripple, high reliability and diversified output current waveform. The power supply Usually work together in series, parallel or a combination of series and parallel. In the past power supply system, the fault chain between the power supplies is only transmitted in the form of communication, and the signal is transmitted through the wire connection, which often causes electromagnetic interference to be transmitted between the power supplies, which brings difficulties to the a...
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IPC IPC(8): H02H3/02H02H1/00
CPCH02H1/0061H02H3/02
Inventor 蔺满强吴保宁康主会陈改霞姚玉玺孙晓桓李星燕柴正勇卢军祥万国华
Owner TIANSHUI ELECTRIC DRIVE RES INST