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Processing method and system of nuclear power plant distributed control system

A technology of a decentralized control system and a processing method, applied in the field of instrumentation and control of nuclear power plants, can solve problems such as increasing the risk of ATWT protection malfunction, and achieve the effect of reducing the probability of malfunction

Active Publication Date: 2015-04-01
DAYA BAY NUCLEAR POWER OPERATIONS & MANAGEMENT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] An embodiment of the present invention provides a processing method for a decentralized control system of a nuclear power plant, aiming to solve the problem that the existing method sends an abnormally fluctuating current signal to the ATWT protection when performing range switching, thereby increasing the risk of ATWT protection misoperation

Method used

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  • Processing method and system of nuclear power plant distributed control system
  • Processing method and system of nuclear power plant distributed control system
  • Processing method and system of nuclear power plant distributed control system

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Embodiment 1

[0026] figure 2 It shows a flow chart of a processing method of a nuclear power plant distributed control system provided by the first embodiment of the present invention. In the embodiment of the present invention, the current acquisition and processing board of the RPN cabinet divides the current signal into analog and switch values ​​and transmits them to the TXP system (distributed control system), the TXP system calculates the corresponding current signal according to the received analog and switch values, and selects the time to send the calculated current signal to the ATWT protection according to the determined delay time. Among them, the "first current signal" in the embodiment of the present invention refers to the signal output by the current acquisition and processing board, the "second current signal" refers to the current signal calculated by the TXP system, and the "second current signal" in the "first current signal" The "second" in "one" and "second current s...

Embodiment 2

[0052] Figure 4 A structural diagram of a processing system of a nuclear power plant distributed control system provided by the second embodiment of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown.

[0053] The processing system of the distributed control system of the nuclear power plant includes: an information receiving unit 41 , a range switching state judging unit 42 , a current delay time determining unit 43 , and a current output unit 44 . in:

[0054] The information receiving unit 41 is configured to receive information sent by the current acquisition and processing board; the information includes the range code of the first current signal and the effective bit of the current acquisition and processing board.

[0055] Wherein, the current signal sent by the current acquisition and processing board includes two parts of analog quantity and range code, and the current acquisiti...

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Abstract

The invention belongs to the nuclear power plant instrument control field and provides a processing method and system of a nuclear power plant distributed control system. The method includes the following steps that: information transmitted by a current acquisition and processing board is received, wherein the information includes ranging codes of first current signals and significance bits of the current acquisition and processing board; whether the current acquisition and processing board is in a ranging switching state is judged according to the received information; and when the current acquisition and processing board is in the ranging switching state, delay time for transmitting second current signals to anticipated transients without trip (ATWT) protection is determined according to the received information which is transmitted by the current acquisition and processing board, wherein the second current signals are determined according to the ranging codes and analog quantity of the first current signals. With the processing method and system provided by the embodiment of the invention, the probability of misoperation of the ATWT protection can be decreased.

Description

technical field [0001] The invention belongs to the field of instrumentation and control of nuclear power plants, and in particular relates to a processing method and system for a distributed control system of a nuclear power plant. Background technique [0002] At present, the middle range of the digital processing system used by Ling Ao Phase II nuclear instrumentation system (RPN system) is applied to reactor power platforms ranging from 1E-6% FP to 100% FP, and the processed current signals are 1E-11A to 1E-3A , across 8 orders of magnitude. In order to ensure the accuracy of the measurement signal and transmission, the current acquisition and processing board is used to divide the current signal of the middle range into two parts for transmission, assuming that the expression of the current signal is I=A*10 B , A represents the analog quantity within the selected range, and the current signal is 0-1mA; B represents the range code (switching value belonging to the curre...

Claims

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Application Information

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IPC IPC(8): G21D3/06
CPCG21D3/06Y02E30/00
Inventor 林萧衡蒲杰英安跃森常宝富连建国韩毅李明钢
Owner DAYA BAY NUCLEAR POWER OPERATIONS & MANAGEMENT
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