CN113721480A - Simulation method and system for diversified protection signals of nuclear power plant - Google Patents
Simulation method and system for diversified protection signals of nuclear power plant Download PDFInfo
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- CN113721480A CN113721480A CN202110930344.2A CN202110930344A CN113721480A CN 113721480 A CN113721480 A CN 113721480A CN 202110930344 A CN202110930344 A CN 202110930344A CN 113721480 A CN113721480 A CN 113721480A
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Abstract
The invention provides a diversified protection signal analog simulation method and a diversified protection signal analog simulation system for a nuclear power plant, wherein the method comprises the following steps: acquiring the type of a protection signal; when the type is a switching value signal, the signal inlet terminal is short-circuited by using a short-circuit wire to realize the connection in the analog simulation switching value signal, and the signal inlet terminal is isolated to realize the disconnection in the analog simulation switching value signal; when the type is a passive analog quantity signal, an adjustable resistor is connected at a signal inlet terminal of the passive analog quantity conditioning distribution card, and the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value; when the type is an active analog quantity signal, the adjustable resistor is connected at the signal inlet terminal of the passive analog quantity conditioning distribution card, the standby terminal current output signal of the passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through the short-circuit wire, and the analog simulation of the active analog quantity signal is realized by adjusting the resistance value. The simulation method for diversified protection signals of the nuclear power plant is simple and efficient, low in cost and high in reliability.
Description
Technical Field
The invention relates to the technical field of nuclear power plant debugging, in particular to a diversified protection signal analog simulation method and system for a nuclear power plant.
Background
The nuclear power plant reactor protection system has the function of protecting the integrity of three safety barriers (namely a fuel cladding, a primary circuit pressure boundary and a containment vessel) of a nuclear power plant, and the comprehensive verification of the protection function of the nuclear power plant reactor protection system is important for the safe operation of the nuclear power plant. In the full-period test and verification process of the reactor protection system, the single debugging stage, the reactor protection commissioning stage during the unit thermal state function test, and the nuclear power station instrument and control power supply power loss test (COC) stage of the unit thermal state function test thermal shutdown platform are all required to be available or available in simulation. The input signals are numerous and various in types, and include analog quantity signals, switching value signals, active signals, passive signals and the like.
In the debugging stage of the nuclear power plant, because many process systems are handed over and debugged late and are influenced by hand-over tail items such as installation of local instruments and cable termination, a large number of input signals sent to the reactor protection system are unavailable, and the function test of the reactor protection system is restricted. It is therefore necessary to discriminate these unusable protection input signals in advance and to simulate them.
One of the existing diversified input signal protection simulation methods is a pure software implementation manner in combination with a signal generator. In the full-period debugging stage, aiming at unavailable input signals, signal forcing is carried out by using a special software tool of a Digital Control System (DCS), and the signals are simulated at values required by experiments. During the COC power loss test, signals forced by software disappear after the DCS cabinet loses power, and for unavailable analog quantity input signals, the signals need to be continuously simulated by using a signal generator, so that the cabinet is ensured to have continuous analog quantity signal simulation input before and after power loss, and the requirement of COC power loss test signal state inspection is met. The diversified protection input signal analog simulation method realized by pure software in combination with a signal generator has the following defects: in the full-period debugging stage, a large number of signal forcing points are added in a special software tool of the DCS, the workload is large, signal forcing and forcing cancellation operation are frequently required, and the risk of false triggering of the protection function caused by failure of people such as operation errors and unexpected power failure of the DCS cabinet in the process is high. During the COC power-off test, because the number of the unavailable signals sent to the DCS cabinet by the local instruments is large, and the number of the signal generators is limited, the condition of simultaneously simulating a large number of instrument signals is not met, and the COC power-off test requirement cannot be met.
The second of the existing diversified input signal protection simulation methods is an external simulation platform implementation mode. The simulation platform is constructed by a special simulation computer, a simulation cabinet, an external power supply, a simulation signal cable, a network cable and the like, wherein the simulation cabinet is connected with the DCS cabinet through a large number of simulation signal cables. After the simulation platform is built, under the condition that the communication between the simulation cabinet and the DCS cabinet is normal, a special simulation computer is used for carrying out simulation on the required input signals, and the test requirements are met. The diversified protection input signal analog simulation method realized by the external simulation platform has the following defects: a large number of simulation signal cables need to be laid and connected when a simulation platform is built, the workload is large, the construction period is long, and the required labor cost and the required maintenance cost are high. The simulation cabinet needs to use an external power supply to maintain power supply so as to ensure the continuous operation of the simulation platform, if the external power supply is powered off, the simulation signal simulated by the simulation platform disappears, and the reactor protection signal is triggered by mistake to cause the malfunction of downstream process equipment. The realization mode of the simulation platform has larger dependence on the stability and reliability of an external power supply.
The existing simulation mode of pure software matched with a signal generator has large signal forced workload and higher human failure risk, and a plurality of signal generators are required to be used for simulation in specific stages such as a COC power-off test, so that more constraint conditions are met. The existing external simulation platform implementation mode has the advantages of large workload, long construction period, high required labor cost and maintenance cost and great dependence on the stability and reliability of an external power supply when the simulation platform is built. The two existing analog simulation techniques have obvious defects and limitations.
How to provide a simple, efficient and reliable simulation method for diversified protection signals of a nuclear power plant is a problem to be solved urgently at present.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a method and a system for simulating diversified protection signals of a nuclear power plant, so as to solve the deficiencies of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a nuclear power plant diversified protection signal simulation method, which comprises the following steps:
acquiring the type of the protection signal, wherein the type of the protection signal comprises: the switching value signal, the passive analog quantity signal and the active analog quantity signal;
when the type of the obtained protection signal is a switching value signal, a short-circuit wire is used for short-circuiting a signal inlet terminal to realize the connection in the analog simulation switching value signal; isolating the signal inlet terminal to realize disconnection in the analog simulation switching value signal;
when the type of the obtained protection signal is a passive analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of a KCS cabinet passive analog quantity conditioning distribution card, and the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value of the adjustable resistor;
when the type of the obtained protection signal is an active analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of the KCS cabinet passive analog quantity conditioning distribution card, a standby terminal current output signal of the KCS cabinet passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through a short-circuit wire, and the active analog quantity signal analog simulation is realized by adjusting the resistance value of the adjustable resistor.
Further, the passive analog conditioning distribution card adopts a SABK01C board card; the SABK01C board card is used for collecting input passive 0-24 mA current signals, a 24V power supply is provided inside the board card, 4 paths of standard 0-24 mA current signals are output to realize input and output isolation after signal conditioning and isolation, and all outputs are isolated from each other.
Further, the active analog conditioning distribution card adopts a SABK01A board card; the SABK01A board card is used for collecting input active 0-24 mA current signals, after signal conditioning and isolation, 4 paths of standard 0-24 mA current signals are output to achieve input and output isolation, and outputs are isolated from each other.
Further, the switching value signal is a passive signal, and a 24V power supply is provided by a digital value input board card of the KCS cabinet.
Further, for the passive analog quantity signal, the passive analog quantity conditioning distribution card provides power, and for the main feedwater flow measurement transducer ARE049MD, the simulation method specifically comprises the following steps: the external cable of the main feed water flow measurement transmitter ARE049MD at the entrance terminal of the KCS cabinet is detached, the adjustable resistor is connected, the current value of the input signal of the main feed water flow measurement transmitter ARE049MD is 4mA by adjusting the resistance value of the adjustable resistor, and the simulation purpose that the flow of the main feed water flow measurement transmitter ARE049MD is 0 is realized.
Further, for the active analog quantity signal, an original instrument body provides a power supply, and for a nuclear power measuring range probe power signal RPN010MA-PR, the simulation method specifically comprises the following steps: the main feed water flow measurement transmitter ARE049MD and the nuclear power range probe power signal RPN010MA-PR ARE detached from an external cable at an entrance terminal of a KCS cabinet, the adjustable resistor is connected to the KCS cabinet terminal of the main feed water flow measurement transmitter ARE049MD in an access mode, the resistance value of the adjustable resistor is adjusted, the current value of an input signal of the main feed water flow measurement transmitter ARE049MD is 4mA, a 4mA current signal output by a standby terminal of the passive analog conditioning distribution card of the main feed water flow measurement transmitter ARE049MD is led to the input end of the nuclear power range probe power signal RPN010MA-PR active analog conditioning distribution card through a short-connection wire, and the simulation display of the nuclear power range probe power signal PN010MA-PR range lower limit is realized.
The embodiment of the invention also provides a diversified protection signal analog simulation system for a nuclear power plant, which comprises the following steps:
the device comprises an active analog quantity conditioning distribution card, a passive analog quantity conditioning distribution card, an adjustable resistor and a short-circuit wire;
the adjustable resistor is used for being connected with a signal inlet terminal of the passive analog quantity conditioning distribution card to replace an original passive analog quantity signal instrument; the short-circuit line is used for connecting a standby terminal current output signal of the passive analog quantity conditioning distribution card and an input end of the active analog quantity conditioning distribution card;
the types of diversified protection signals of the nuclear power plant include: the switching value signal, the passive analog quantity signal and the active analog quantity signal;
when the type of the obtained protection signal is a switching value signal, the short-circuit wire is used for short-circuiting the signal inlet terminal to realize the connection in the analog simulation switching value signal; isolating the signal inlet terminal to realize disconnection in the analog simulation switching value signal;
when the type of the obtained protection signal is a passive analog quantity signal, the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value of the adjustable resistor connected at the signal inlet terminal of the passive analog quantity conditioning distribution card;
when the type of the obtained protection signal is an active analog quantity signal, the resistance value of the adjustable resistor connected to the signal inlet terminal of the passive analog quantity conditioning distribution card is adjusted, and then the standby terminal current output signal of the passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through the short-circuit wire to realize the analog simulation of the active analog quantity signal.
Further, the passive analog conditioning distribution card adopts a SABK01C board card; the SABK01C board card is used for collecting input passive 0-24 mA current signals, a 24V power supply is provided inside the board card, 4 paths of standard 0-24 mA current signals are output to realize input and output isolation after signal conditioning and isolation, and all outputs are isolated from each other.
Further, the active analog conditioning distribution card adopts a SABK01A board card; the SABK01A board card is used for collecting input active 0-24 mA current signals, after signal conditioning and isolation, 4 paths of standard 0-24 mA current signals are output to achieve input and output isolation, and outputs are isolated from each other.
Further, the switching value signal is a passive signal, and a 24V power supply is provided by a digital value input board card of the KCS cabinet.
Further, for the passive analog quantity signal, the passive analog quantity conditioning distribution card provides power, and for the main feedwater flow measurement transducer ARE049MD, the simulation method specifically comprises the following steps: the external cable of the main feed water flow measurement transmitter ARE049MD at the entrance terminal of the KCS cabinet is detached, the adjustable resistor is connected, the current value of the input signal of the main feed water flow measurement transmitter ARE049MD is 4mA by adjusting the resistance value of the adjustable resistor, and the simulation purpose that the flow of the main feed water flow measurement transmitter ARE049MD is 0 is realized.
Further, for the active analog quantity signal, an original instrument body provides a power supply, and for a nuclear power measuring range probe power signal RPN010MA-PR, the simulation method specifically comprises the following steps: the main feed water flow measurement transmitter ARE049MD and the nuclear power range probe power signal RPN010MA-PR ARE detached from an external cable at an entrance terminal of a KCS cabinet, the adjustable resistor is connected to the KCS cabinet terminal of the main feed water flow measurement transmitter ARE049MD in an access mode, the resistance value of the adjustable resistor is adjusted, the current value of an input signal of the main feed water flow measurement transmitter ARE049MD is 4mA, a 4mA current signal output by a standby terminal of the passive analog conditioning distribution card of the main feed water flow measurement transmitter ARE049MD is led to the input end of the nuclear power range probe power signal RPN010MA-PR active analog conditioning distribution card through a short-connection wire, and the simulation display of the nuclear power range probe power signal PN010MA-PR range lower limit is realized.
Compared with the prior art, the invention has the following beneficial effects: the invention provides a self-simulation method by matching a DCS inherent conditioning distribution card with an adjustable resistor, and realizes the simulation of diversified input signals of a reactor protection system. The input signals do not need to be subjected to software forcing, the problem of large workload caused by large forced quantity of the software signals is solved, potential safety hazards caused by disappearance of the software forced signals and manual forced operation errors in the power-on and power-off processes of the cabinet are avoided, and the risk of human factor failure is reduced; when the COC is in a power-off test, a signal generator is not needed, and the problem that the number of the signal generators is insufficient when the COC is matched with the power-off test is solved. A simulation platform is not required to be built, the problems of large workload and long construction period caused by laying and terminating a large number of simulation cables are solved, and the cost and the construction period are saved; an external power supply is not needed, the problem that the simulation signal is easily influenced by the reliability of the external power supply due to the mode of using the external simulation platform is solved, and the reliability of the simulation signal is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a simulation method for diversified protection signals of a nuclear power plant according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection between a passive analog quantity signal instrument and a board card;
FIG. 3 is a schematic diagram of the connection between an active analog signal instrument and a board card;
FIG. 4 is a schematic diagram of a connection for passive analog signal simulation;
fig. 5 is a schematic diagram of the connection of the active analog signal simulation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a method for simulating diversified protection signals of a nuclear power plant, where the method includes:
s101, obtaining the type of a protection signal, wherein the type of the protection signal comprises: the switching value signal, the passive analog quantity signal and the active analog quantity signal.
S102, when the type of the obtained protection signal is a switching value signal, a short-circuit wire is used for short-circuiting a signal inlet terminal to realize the connection in the analog simulation switching value signal; isolating the signal inlet terminal to realize disconnection in the analog simulation switching value signal; when the type of the obtained protection signal is a passive analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of a KCS cabinet passive analog quantity conditioning distribution card, and the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value of the adjustable resistor; when the type of the obtained protection signal is an active analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of the KCS cabinet passive analog quantity conditioning distribution card, a standby terminal current output signal of the KCS cabinet passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through a short-circuit wire, and the active analog quantity signal analog simulation is realized by adjusting the resistance value of the adjustable resistor.
In input signals of the reactor protection system, switching value signals are passive signals, and a 24V power supply is provided by a safety level process control cabinet system (KCS) cabinet digital value input (DI) board card; the analog quantity signals are divided into active analog quantity signals and passive analog quantity signals, and are acquired by a KCS cabinet analog quantity conditioning distribution card. The KCS cabinet analog conditioning distribution card has two types: SABK01A and SABK 01C. The SABK01A is an active analog quantity conditioning board card and is used for collecting input active 0-24 mA current signals, outputting 4 paths of standard 0-24 mA current signals after signal conditioning and isolation to realize input and output isolation, and isolating outputs from each other; the SABK01C is a passive analog quantity conditioning board card, is used for collecting input passive 0-24 mA current signals (passive signals, a 24V power supply is provided inside the board card), outputs 4 paths of standard 0-24 mA current signals after signal conditioning and isolation, realizes input and output isolation, and realizes mutual isolation between outputs. Active analog quantity signals of the reactor protection system are collected by an SABK01A board card, and passive analog quantity signals are collected by an SABK01C board card.
Aiming at diversified protection input signals, the simulation method comprises the following steps:
1. switching value signal: if the signal needs to be simulated to be 1 (connected), a short-circuit wire is used for short-circuiting the signal inlet terminal; if the signal needs to be simulated as 0 (disconnected), the signal inlet terminal is isolated.
2. Passive analog quantity signal: and the adjustable resistor is used for simulation at the signal inlet terminal, and the signal simulation is available by adjusting the resistance value of the adjustable resistor.
3. Active analog quantity signal: through matching with the adjustable resistor, a standby terminal 4-20 mA current output signal of the KCS cabinet passive analog conditioning distribution card is led to the input end of the active analog conditioning distribution card, and the purpose that signal simulation is available is achieved.
The technical principle of the analog input signal simulation method is shown in fig. 2 to 4.
As shown in fig. 2, for the passive analog signal, a fixed voltage source is provided by the passive conditioning board. The output end of the passive conditioning board card is connected with analog input equipment AI. The input end of the passive conditioning board card is connected with a passive analog quantity signal instrument M.
As shown in fig. 3, for the active analog signal, the output end of the active conditioning board is connected to an analog input device AI. The input end of the active conditioning board card is connected with an active analog quantity signal instrument M. The fixed voltage source is provided by an active analog quantity signal meter M.
As shown in fig. 4, for the simulation of the passive analog quantity signal, the passive analog quantity signal meter M is simply replaced by an adjustable resistor.
As shown in fig. 5, for the simulation of the active analog quantity signal, an active conditioning board card and a passive conditioning board card are used at the same time; the passive analog quantity signal instrument M is replaced by the adjustable resistor, the data connection between the active analog quantity signal instrument M and the active conditioning board card is disconnected, and the active analog quantity signal instrument M only provides fixed voltage for the active conditioning board card. And finally, leading the standby terminal current output signal of the passive conditioning board card to the input end of the active conditioning board card through a short-circuit wire.
The analog input signal simulation method is described in the following with specific examples in connection with passive and active signal simulation.
As shown in fig. 4, the passive analog quantity signal is powered by a KCS cabinet passive analog quantity conditioning distribution card, taking a main feedwater flow measurement transducer ARE049MD (AI) as an example, the simulation method is as follows: the external cable of the ARE049MD at the entrance terminal of the KCS cabinet is removed, the adjustable resistor is connected, the current value of an ARE049MD input signal is 4mA by adjusting the resistance value, and the simulation purpose that the ARE049MD flow is 0 (the lower limit of the physical quantity measuring range) is realized.
As shown in fig. 5, the active analog signal is powered by the local meter body M, and taking the nuclear power range probe power signal RPN010MA-PR (AI2) as an example, the simulation method is as follows: the external cables of ARE049MD (AI1) and RPN010MA-PR (AI2) at the entrance terminal of a KCS cabinet ARE removed, an adjustable resistor is connected to the KCS cabinet terminal of ARE049MD (AI1), the resistance value is adjusted, the current value of an input signal of ARE049MD is 4mA, and a 4mA current signal output by a standby terminal of an ARE049MD (AI1) passive analog conditioning distribution card is led to the input end of an RPN 010-010 MA-PR (AI2) active analog conditioning distribution card through a short-connection wire, so that the simulation display of the lower limit of the range of RPN010MA-PR can be realized.
The simulation method is already applied in practice, and a very good effect is obtained.
According to the simulation method, only the short-circuit wire, the adjustable resistor and the inherent analog quantity conditioning distribution card of the KCS cabinet are used, so that the self-simulation of diversified input signals of the reactor protection system is realized, and the requirements of a full-period debugging test and a COC power-off test of the reactor protection system are efficiently met. The simulation method has the following characteristics:
1) the self-simulation method for diversified input signals of the reactor protection system comprises the following steps: the software signal is not forced manually without depending on an external power supply;
2) aiming at a passive analog quantity input signal of a reactor protection system, a method of accessing an adjustable resistor and realizing signal analog simulation by adjusting a resistance value is adopted;
3) aiming at an active analog input signal of the reactor protection system, an analog simulation method of matching an inherent conditioning distribution card of the DCS with an adjustable resistor is adopted.
The self-simulation method provided by the invention is simple, convenient and efficient, saves cost, shortens the construction period, obviously reduces the workload, improves the reliability of simulation signals and reduces the human factor failure risk.
The embodiment of the invention also provides a diversified protection signal analog simulation system for a nuclear power plant, which comprises the following steps:
the device comprises an active analog quantity conditioning distribution card, a passive analog quantity conditioning distribution card, an adjustable resistor and a short-circuit wire; the adjustable resistor is used for being connected with a signal inlet terminal of the passive analog quantity conditioning distribution card to replace an original passive analog quantity signal instrument; the short-circuit line is used for connecting a standby terminal current output signal of the passive analog quantity conditioning distribution card and an input end of the active analog quantity conditioning distribution card; the types of diversified protection signals of the nuclear power plant include: the switching value signal, the passive analog quantity signal and the active analog quantity signal; when the type of the obtained protection signal is a switching value signal, the short-circuit wire is used for short-circuiting the signal inlet terminal to realize the connection in the analog simulation switching value signal; isolating the signal inlet terminal to realize disconnection in the analog simulation switching value signal; when the type of the obtained protection signal is a passive analog quantity signal, the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value of the adjustable resistor connected at the signal inlet terminal of the passive analog quantity conditioning distribution card; when the type of the obtained protection signal is an active analog quantity signal, the resistance value of the adjustable resistor connected to the signal inlet terminal of the passive analog quantity conditioning distribution card is adjusted, and then the standby terminal current output signal of the passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through the short-circuit wire to realize the analog simulation of the active analog quantity signal.
The passive analog quantity conditioning distribution card adopts a SABK01C board card; the SABK01C board card is used for collecting input passive 0-24 mA current signals, a 24V power supply is provided inside the board card, 4 paths of standard 0-24 mA current signals are output to realize input and output isolation after signal conditioning and isolation, and all outputs are isolated from each other. The active analog quantity conditioning distribution card adopts a SABK01A board card; the SABK01A board card is used for collecting input active 0-24 mA current signals, after signal conditioning and isolation, 4 paths of standard 0-24 mA current signals are output to achieve input and output isolation, and outputs are isolated from each other. The switching value signal is a passive signal, and a 24V power supply is provided by a digital value input board card of the KCS cabinet.
For the passive analog quantity signal, the passive analog quantity conditioning distribution card provides a power supply, and for the main water supply flow measurement transmitter ARE049MD, the simulation method specifically comprises the following steps: the external cable of the main feed water flow measurement transmitter ARE049MD at the entrance terminal of the KCS cabinet is detached, the adjustable resistor is connected, the current value of the input signal of the main feed water flow measurement transmitter ARE049MD is 4mA by adjusting the resistance value of the adjustable resistor, and the simulation purpose that the flow of the main feed water flow measurement transmitter ARE049MD is 0 is realized.
For the active analog quantity signal, an original instrument body provides a power supply, and for a nuclear power measuring range probe power signal RPN010MA-PR, the simulation method specifically comprises the following steps: the main feed water flow measurement transmitter ARE049MD and the nuclear power range probe power signal RPN010MA-PR ARE detached from an external cable at an entrance terminal of a KCS cabinet, the adjustable resistor is connected to the KCS cabinet terminal of the main feed water flow measurement transmitter ARE049MD in an access mode, the resistance value of the adjustable resistor is adjusted, the current value of an input signal of the main feed water flow measurement transmitter ARE049MD is 4mA, a 4mA current signal output by a standby terminal of the passive analog conditioning distribution card of the main feed water flow measurement transmitter ARE049MD is led to the input end of the nuclear power range probe power signal RPN010MA-PR active analog conditioning distribution card through a short-connection wire, and the simulation display of the nuclear power range probe power signal PN010MA-PR range lower limit is realized.
The objects, technical solutions and advantages of the present invention have been described in detail with reference to the preferred embodiments, it should be understood that the above description is only illustrative of the preferred embodiments of the present invention, and should not be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention, and the scope of the claims of the present invention should be determined by the description of the claims rather than by the limitation of the above embodiments.
Claims (12)
1. A nuclear power plant diversified protection signal simulation method comprises the following steps:
acquiring the type of the protection signal, wherein the type of the protection signal comprises: the switching value signal, the passive analog quantity signal and the active analog quantity signal;
when the type of the obtained protection signal is a switching value signal, a short-circuit wire is used for short-circuiting a signal inlet terminal to realize the connection in the analog simulation switching value signal, and the signal inlet terminal is isolated to realize the disconnection in the analog simulation switching value signal;
when the type of the obtained protection signal is a passive analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of a KCS cabinet passive analog quantity conditioning distribution card, and the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value of the adjustable resistor;
when the type of the obtained protection signal is an active analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of the KCS cabinet passive analog quantity conditioning distribution card, a standby terminal current output signal of the KCS cabinet passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through a short-circuit wire, and the active analog quantity signal analog simulation is realized by adjusting the resistance value of the adjustable resistor.
2. The nuclear power plant diversified protection signal analog simulation method according to claim 1, wherein the passive analog conditioning distribution card is a SABK01C board card; the SABK01C board card is used for collecting input passive 0-24 mA current signals, a 24V power supply is provided inside the board card, 4 paths of standard 0-24 mA current signals are output to realize input and output isolation after signal conditioning and isolation, and all outputs are isolated from each other.
3. The nuclear power plant diversified protection signal analog simulation method according to claim 1, wherein the active analog conditioning distribution card is a SABK01A board card; the SABK01A board card is used for collecting input active 0-24 mA current signals, after signal conditioning and isolation, 4 paths of standard 0-24 mA current signals are output to achieve input and output isolation, and outputs are isolated from each other.
4. The nuclear power plant diversified protection signal analog simulation method according to claim 1, wherein the switching value signal is a passive signal, and a 24V power supply is provided by a digital input board card of a KCS cabinet.
5. The simulation method for the diversified protection signal of the nuclear power plant according to claim 1, wherein the passive analog quantity signal is powered by the passive analog quantity conditioning distribution card, and the simulation method for the primary water flow measurement transducer ARE049MD specifically comprises the following steps: the external cable of the main feed water flow measurement transmitter ARE049MD at the entrance terminal of the KCS cabinet is detached, the adjustable resistor is connected, the current value of the input signal of the main feed water flow measurement transmitter ARE049MD is 4mA by adjusting the resistance value of the adjustable resistor, and the simulation purpose that the flow of the main feed water flow measurement transmitter ARE049MD is 0 is realized.
6. The simulation method of the diversified protection signal of the nuclear power plant according to claim 5, wherein for the active analog quantity signal, a power supply is provided by an original instrument body, and for the nuclear power range probe power signal RPN010MA-PR, the simulation method specifically comprises: the main feed water flow measurement transmitter ARE049MD and the nuclear power range probe power signal RPN010MA-PR ARE detached from an external cable at an entrance terminal of a KCS cabinet, the adjustable resistor is connected to the KCS cabinet terminal of the main feed water flow measurement transmitter ARE049MD in an access mode, the resistance value of the adjustable resistor is adjusted, the current value of an input signal of the main feed water flow measurement transmitter ARE049MD is 4mA, a 4mA current signal output by a standby terminal of the passive analog conditioning distribution card of the main feed water flow measurement transmitter ARE049MD is led to the input end of the nuclear power range probe power signal RPN010MA-PR active analog conditioning distribution card through a short-connection wire, and the simulation display of the nuclear power range probe power signal PN010MA-PR range lower limit is realized.
7. A diversified protection signal analog simulation system of a nuclear power plant is characterized by comprising:
the device comprises an active analog quantity conditioning distribution card, a passive analog quantity conditioning distribution card, an adjustable resistor and a short-circuit wire;
the adjustable resistor is used for being connected with a signal inlet terminal of the passive analog quantity conditioning distribution card to replace an original passive analog quantity signal instrument; the short-circuit line is used for connecting a standby terminal current output signal of the passive analog quantity conditioning distribution card and an input end of the active analog quantity conditioning distribution card;
the types of diversified protection signals of the nuclear power plant include: the switching value signal, the passive analog quantity signal and the active analog quantity signal;
when the type of the obtained protection signal is a switching value signal, the short-circuit wire is used for short-circuiting the signal inlet terminal to realize the connection in the analog simulation switching value signal; isolating the signal inlet terminal to realize disconnection in the analog simulation switching value signal;
when the type of the obtained protection signal is a passive analog quantity signal, the analog simulation of the passive analog quantity signal is realized by adjusting the resistance value of the adjustable resistor connected at the signal inlet terminal of the passive analog quantity conditioning distribution card;
when the type of the obtained protection signal is an active analog quantity signal, the resistance value of the adjustable resistor connected to the signal inlet terminal of the passive analog quantity conditioning distribution card is adjusted, and then the standby terminal current output signal of the passive analog quantity conditioning distribution card is led to the input end of the active analog quantity conditioning distribution card through the short-circuit wire to realize the analog simulation of the active analog quantity signal.
8. The nuclear power plant diversified protection signal analog simulation system according to claim 7, wherein the passive analog conditioning distribution card is a SABK01C board card; the SABK01C board card is used for collecting input passive 0-24 mA current signals, a 24V power supply is provided inside the board card, 4 paths of standard 0-24 mA current signals are output to realize input and output isolation after signal conditioning and isolation, and all outputs are isolated from each other.
9. The nuclear power plant diversified protection signal analog simulation system according to claim 7, wherein the active analog conditioning distribution card is a SABK01A board card; the SABK01A board card is used for collecting input active 0-24 mA current signals, after signal conditioning and isolation, 4 paths of standard 0-24 mA current signals are output to achieve input and output isolation, and outputs are isolated from each other.
10. The nuclear power plant diversified protection signal analog simulation system according to claim 7, wherein the switching value signal is a passive signal, and a 24V power supply is provided by a digital value input board card of a KCS cabinet.
11. The nuclear power plant diversified protection signal simulation system according to claim 7, wherein for the passive analog quantity signal, the passive analog quantity conditioning distribution card provides power, and for a main water flow measurement transmitter ARE049MD, the simulation method specifically comprises: the external cable of the main feed water flow measurement transmitter ARE049MD at the entrance terminal of the KCS cabinet is detached, the adjustable resistor is connected, the current value of the input signal of the main feed water flow measurement transmitter ARE049MD is 4mA by adjusting the resistance value of the adjustable resistor, and the simulation purpose that the flow of the main feed water flow measurement transmitter ARE049MD is 0 is realized.
12. The nuclear power plant diversified protection signal simulation system according to claim 11, wherein for the active analog quantity signal, a power supply is provided by an original meter body, and for a nuclear power range probe power signal RPN010MA-PR, the simulation method specifically comprises: the main feed water flow measurement transmitter ARE049MD and the nuclear power range probe power signal RPN010MA-PR ARE detached from an external cable at an entrance terminal of a KCS cabinet, the adjustable resistor is connected to the KCS cabinet terminal of the main feed water flow measurement transmitter ARE049MD in an access mode, the resistance value of the adjustable resistor is adjusted, the current value of an input signal of the main feed water flow measurement transmitter ARE049MD is 4mA, a 4mA current signal output by a standby terminal of the passive analog conditioning distribution card of the main feed water flow measurement transmitter ARE049MD is led to the input end of the nuclear power range probe power signal RPN010MA-PR active analog conditioning distribution card through a short-connection wire, and the simulation display of the nuclear power range probe power signal PN010MA-PR range lower limit is realized.
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