System and method for switching signal transmission control between safety-level redundant sequences of nuclear power plant
A switching signal and control system technology, applied in the field of nuclear power, can solve problems such as low reliability and achieve the effect of ensuring independence
Active Publication Date: 2016-01-06
中广核工程有限公司 +1
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Problems solved by technology
[0009] The technical problem to be solved by the present invention is to provide a high-reliability nuclear power plant safety-level redundant inter-sequence switch in view of the defect of low reliability of the switching signal transmission scheme between the redundant sequences of the safety-level instrument and control system of the existing nuclear power plant Quantity signal transmission control system and method
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0031] see figure 2 , is an electrical connection diagram of the nuclear power plant safety-level redundancy inter-sequence switching signal transmission control system according to a preferred embodiment of the present invention. Such as figure 2 As shown, the switch signal transmission control system provided by the preferred embodiment of the present invention is used to transmit switch signals between the redundant first safety level sequence and the second safety level sequence. For example, the switching signal is transmitted between the security level A column 10 and the security level B column. Here, the safety level A column 10 is taken as the first security level sequence, and the safety level B column 20 is taken as the second safety...
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The invention relates to a system and a method for switching value signal transmission control in nuclear power plant security level redundant sequences. The system comprises a first disconnecting relay, a second disconnecting relay and a direct current (DC) / DC disconnecting module, wherein the first disconnecting relay and a switching value output module of a first security level sequence form a first electric loop, the first disconnecting relay and the second disconnecting relay form a second electric loop, and the second disconnecting relay and a switching value input module of a second security level sequence form a third electric loop. Middle electric loops and the DC / DC disconnecting module are introduced, the power supply is disconnected, the electric fault cannot expand among redundant sequences of a security-level instrument control system when the switching value signal is transmitted and the safety of security-level sequences on two sides can be guaranteed.
Description
technical field [0001] The invention relates to the technical field of nuclear power, more specifically, to a control method and system for switching signal transmission between safety-level redundant sequences of nuclear power plants. Background technique [0002] It is inevitable that there will be signal exchange between redundant sequences of safety-level instrument and control systems in nuclear power plants. In order to ensure the independence of safety-level instrument and control systems, certain isolation measures must be set in the signal exchange circuits to avoid electrical failures (such as , grounding, etc.) between redundant sequences of safety-rated I&C systems. [0003] In order to prevent faults from spreading between the safety level A column and the safety level B column when switching electrical signals between safety level redundant sequences (such as safety level A column and safety level B column), the above circuit must be connected Electrical isola...
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IPC IPC(8): G21D3/00
CPCY02E30/00
Inventor 郑添张龙强彭华清刘光明孙永滨陈卫华黄伟军孙伟田勇
Owner 中广核工程有限公司