CN109949956B - High-load working condition simulation method and system for nuclear power station control system - Google Patents
High-load working condition simulation method and system for nuclear power station control system Download PDFInfo
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Abstract
The invention relates to a high-load working condition simulation method and system for a nuclear power station control system, belongs to the technical field of nuclear power station control system testing, and solves the problems that the wiring workload is large, the labor, development and maintenance and price cost are high, and output signals and network point changes cannot be simulated in the conventional high-load working condition simulation. The method comprises the following steps: selecting a signal to be changed from a control system, and forming a signal configuration table according to the name of the signal and the signal time sequence change requirement; sending a remote control instruction to a CPU (central processing unit) of each control station in a control system according to a signal configuration table so as to change the value of a corresponding signal of the control station; reading back the signal value of the changed control station to confirm that the change is successful; and reading and judging whether the CPU load, the memory allowance and the response time of the control station meet expected requirements or not. The simulation of the high-load working condition is realized more truly, and the high-load working condition simulation wiring workload, the labor cost, the development and maintenance cost and the price cost are saved.
Description
Technical Field
The invention relates to the technical field of nuclear power station control system testing, in particular to a high-load working condition simulation method for a nuclear power station control system.
Background
A digital instrument control system (DCS) of a nuclear power station is a nerve center of the nuclear power station, controls the operation of two hundred or more systems and nearly thousand devices of the nuclear power station and various working condition processing processes, and plays an important role in ensuring the safe, reliable and stable operation of the nuclear power station.
The high-load working condition of the control system of the nuclear power station means that signals in the control system change rapidly in a large quantity when a major accident occurs in the nuclear power station, so that the operation load of a Central Processing Unit (CPU) is increased, and the network load of the control system is increased due to the fact that a large quantity of data are transmitted in a short time; whether the nuclear power station control system can work normally under the condition can quickly respond to an operator instruction, and the safety of the reactor is directly influenced. Therefore, in the factory test stage of the control system, a high-load working condition needs to be simulated, whether the CPU load, the memory allowance, the response time and the like of the system meet requirements or not is tested, the function and the performance of the control system are ensured to meet the requirements, and the nuclear safety is guaranteed. The simulation of the high-load working condition is to artificially manufacture the change of a large number of signals of the control system; the signal type in the control system is divided into analog quantity and switching value; signals may be transmitted through hard wiring, such as from field devices, or through a network, such as between control stations of a control system via a system bus.
The existing high-load working condition simulation method is that a device provided with a signal output clamping piece is used, a clamping piece channel is connected with a terminal of a control station cabinet of a control system through hard wiring, a special script is arranged in the device, the output value of the clamping piece channel can be controlled, the state of the signal receiving value of the control system is further changed, and a system architecture schematic diagram of the high-load working condition is simulated through the hard wiring method, and is shown in figure 1. The high load needs to simulate a large amount of signal changes, when the device hard-wiring method is used, one signal needs two hard-wiring lines, which causes great wiring workload, in addition, each project needs to be re-wired, the previous hard-wiring line cannot be reused, a large amount of manpower and materials are consumed, the method cannot be fully simulated, only input signals of a control system can be simulated, and changes of output signals and network points cannot be simulated, and finally, the development and maintenance cost of the test device required by the method is high, IO card pieces need to be configured in the device, and the cost of an industrial control computer is high.
Disclosure of Invention
In view of the foregoing analysis, an embodiment of the present invention is directed to providing a method for simulating a high-load operating condition of a nuclear power plant control system, so as to solve the problems of large wiring workload, high manpower, development and maintenance costs, high price costs, and incapability of simulating output signals and network point changes in the existing high-load operating condition simulation.
On one hand, the invention provides a high-load working condition simulation method for a nuclear power station control system, which comprises the following steps:
selecting a signal to be changed from a control system, and forming a signal configuration table according to the name of the signal and the signal time sequence change requirement;
reading a signal configuration table, and sending a remote control instruction to a CPU (central processing unit) of each control station in a control system according to the signal configuration table so as to change the value of a corresponding signal of the control station;
reading back the signal value of the changed control station to confirm that the change is successful;
and after the change is successful, reading and judging whether the CPU load, the memory allowance and the response time of the control station meet the expected requirements or not so as to realize the simulation of the high-load working condition.
The beneficial effects of the above technical scheme are: compared with a hard wiring scheme, the simulation of the high-load working condition is realized more truly, and the high-load working condition simulation wiring workload, the labor cost, the development and maintenance cost and the price cost are saved.
Further, selecting a signal to be changed from the control system specifically includes: according to the high-load working condition simulation requirement, a certain number of analog quantity signals and switching value signals are selected from a control system.
The beneficial effects of the further technical scheme are as follows: the simulation requirements of high-load working conditions and various signal types are fully considered, so that the simulation of high load is more real.
Further, according to the name of the signal and the signal timing variation requirement, a signal configuration table is formed, which specifically includes: and placing the signal name in a first column or row of a signal configuration table, and sequentially placing the value corresponding to each step of signal time sequence change in the corresponding column or row, thereby forming the signal configuration table.
The beneficial effects of the further technical scheme are as follows: the signal configuration table formed by the scheme is convenient for changing the signal value of each control station according to the time sequence requirement.
Further, sending a remote control instruction to each control station CPU in the control system according to the signal configuration table specifically includes: and acquiring a network address, a signal address and signal type information corresponding to the signal name from a control system database according to the signal name in the signal configuration table, generating a data packet by combining a signal value in the signal configuration table, and sending a control instruction in the form of the data packet to a control station CPU (central processing unit) corresponding to the network address information in the control system through a network.
The beneficial effects of the further technical scheme are as follows: the change of the value of the corresponding signal of the control station can be accurately realized through the scheme.
Further, changing the value of the corresponding signal of the control station specifically includes: and sequentially changing the signals corresponding to the signal address and the signal type information in the data packet in each step in the control station once, so that the changed values are consistent with the corresponding signal values in the data packet until the preset step number is reached.
The beneficial effects of the further technical scheme are as follows: through the scheme, the value of the corresponding signal of the control station can be continuously changed until the requirement of a high-load working condition is met.
On the other hand, the invention also provides a high-load working condition simulation system of the nuclear power station control system, which comprises a signal acquisition unit, a signal configuration unit, a remote control unit and a readback judgment unit,
the signal selecting unit is used for selecting the signal needing to be changed from the control system,
the signal configuration unit is used for forming a signal configuration table according to the signal name and the signal time sequence change requirement,
the remote control unit is used for reading the signal configuration table and sending a remote control instruction to the CPUs of the control stations in the control system according to the signal configuration table so as to change the values of the corresponding signals of the control stations,
and the read-back judging unit is used for reading back the signal value of the changed control station, and reading and judging whether the CPU load, the memory allowance and the response time of the control station meet the expected requirements or not.
The beneficial effects of the above technical scheme are: compared with a hard wiring scheme, the simulation of the high-load working condition is realized more truly, and the high-load working condition simulation workload, the labor cost, the development and maintenance cost and the price cost are saved.
Furthermore, the signal selection unit selects a certain number of analog quantity signals and switching value signals from the control system according to the high-load working condition simulation requirement.
The beneficial effects of the further technical scheme are as follows: the simulation requirements of high-load working conditions and various signal types are fully considered, so that the simulation of high load is more real.
Further, the signal configuration unit forms a signal configuration table according to the signal name and the signal timing variation requirement, and specifically includes: the signal configuration unit places the signal name in the first column or row of the signal configuration table, and sequentially places the value corresponding to each step of signal time sequence change in the corresponding column or row, thereby forming the signal configuration table.
The beneficial effects of the further technical scheme are as follows: the signal configuration table formed by the scheme is convenient for changing the signal value of each control station according to the time sequence requirement.
Further, the remote control unit sends a remote control instruction to each control station CPU in the control system according to the signal configuration table, and specifically includes: the remote control unit acquires a network address, a signal address and signal type information corresponding to the signal name from a control system database according to the name in the signal configuration table signal, generates a data packet by combining a signal value in the signal configuration table, and sends a control instruction in the form of the data packet to a control station CPU (central processing unit) corresponding to the network address information in the control system through a network.
The beneficial effects of the further technical scheme are as follows: the change of the value of the corresponding signal of the control station can be accurately realized through the scheme.
Further, the remote control unit changes the value of the corresponding signal of the control station, specifically including: and sequentially changing the signals corresponding to the signal address and the signal type information in the data packet in each step in the control station once, so that the changed values are consistent with the corresponding signal values in the data packet until the preset step number is reached.
The beneficial effects of the further technical scheme are as follows: through the scheme, the value of the corresponding signal of the control station can be continuously changed until the requirement of a high-load working condition is met.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of a system architecture for simulating high load conditions using a hard-wired method according to the prior art;
FIG. 2 is a schematic flow chart of a method according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram illustrating timing variations of signals according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of an architecture of the method according to embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of the system according to embodiment 2 of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
The embodiment of the invention discloses a method for simulating a high-load working condition of a nuclear power station control system, which is a flow schematic diagram and comprises the following steps of:
s1, selecting a signal to be changed from a control system, and forming a signal configuration table according to the time sequence change requirement of the signal;
forming a signal configuration table according to the signal time sequence change requirement, which specifically comprises: and similarly, the value corresponding to each step of the signal time sequence change is sequentially arranged in the corresponding column or row, thereby forming the signal configuration table.
The signals to be changed are input signals which are a certain number of analog quantity signals and switching value signals used for representing the state of the field equipment according to the simulation requirement of the high-load working condition;
the signals comprise analog quantity signals and switching value (digital quantity) signals; taking a FirmSys platform RPS (reactor protection system) as an example, the RPS needs to simulate a high-load working condition in a factory test stage; 200 analog quantity points and 1200 digital quantity points are selected, 1200 points are changed every second when the digital quantity signals are the highest according to requirements, the total test time length is 340 seconds, and a schematic diagram of required signal time sequence change is shown in fig. 3.
Forming a signal configuration table according to the signal time sequence change requirement, specifically, placing the analog quantity point name and the digital quantity name in a first column of the signal configuration table, wherein columns 2 to 341 of the signal configuration table respectively represent the states of signal points (analog quantity points and digital quantity points) of 1 to 340 seconds; wherein the value of the analog signal varies between its maximum and minimum values; the value of the switching value is 0 (indicating false) or 1 (indicating true), and if a certain column contains a signal that does not need to be changed, the state value is not filled.
In a specific embodiment, the signal configuration table is shown in table 1;
TABLE 1
step S2, reading a signal configuration table, and sending a remote control instruction to each control station CPU in the control system according to the signal configuration table so as to change the value of the corresponding signal of the control station;
specifically, a computer loaded with software is connected with each control station CPU of a control system through a network (network cable), a signal configuration table is read through the software, a network address, a signal address and signal type information corresponding to a signal name are obtained from a control system database according to the signal name of the signal configuration table, a data packet is generated by combining a signal value in the signal configuration table, and a control instruction in the form of the data packet is sent to the control station CPU corresponding to the network address information in the control system through the network;
changing the value of the corresponding signal of the control station specifically comprises: and sequentially changing the signals corresponding to the signal offset and the signal type in the data packet in each step in the control station once, so that the changed values are consistent with the corresponding signal values in the data packet until the preset step number is reached.
It should be noted that the CPU module of each control station of the control system provides a maintenance network interface, and signals in the control station can be read and forced (i.e., values of signals are changed) through this interface, and the signal configuration table is an Excel file, a text file, or an access file, and is stored in the computer; the signal configuration table can flexibly define the signal variable to be changed and can define the number of signals changed in each step; the control system database stores the signal name (number) and the actual meaning of the signal name in the control system, and the information such as the network address, the signal type and the like corresponding to the signal name;
the computer is connected with the CPUs of the control stations of the control system through a network, software is developed according to a communication protocol of a FirmSys platform maintenance network, and the network communication protocols and interfaces of different control systems are different;
the communication protocol specifies the meaning of each byte of a transmission data packet, and the meaning comprises information such as a network address, a signal type, a signal value and the like, wherein the network address is used for determining the address of a sender and the address of a receiver;
after the computer is connected with the CPUs of the control stations of the control system through a network, the computer can send and receive data packets to the control system according to a communication protocol, change signal values in the control stations, and read back and analyze the data packets to judge the signal state so as to confirm the success of the change.
Step S3, reading back the signal value of the changed control station to confirm the success of the change;
specifically, the read-back signal value is compared with the signal value to be changed to confirm whether the change is successful;
and step S4, after the change is successful, reading and judging whether the CPU load, the memory allowance and the response time of the control station meet the expected requirements or not so as to realize the simulation of the high-load working condition.
In a specific embodiment, the method of the present invention is implemented to simulate a high-load operation condition architecture diagram of a nuclear power plant control system, as shown in fig. 4.
The changed signals are operated in the CPU, and other signal changes can be triggered, because the signals are correlated in the control system and have complex logic and mathematical operation, and the change of some signals can trigger the change of other signals; for example, the pressure and temperature values of some sensors on site meet specific working condition conditions, and the actions of safety equipment, such as opening of a valve, can be triggered; the rapid change in these large numbers of signals causes the amount of data on the control system bus to increase to enable simulation of high load conditions.
The control system stores various signals (variables), and the signals are classified into analog quantities and switching quantities according to whether the signal values are continuous, the analog quantities are temperature, pressure, flow and the like representing the states of the field devices and the environment, and the switching quantities are on-off states representing the states of the devices and the valve on-off states. The signals can be divided into input signals, intermediate signals, output signals and the like according to the positions of the signals; the input signal is a signal collected by the control system, such as a signal from a field sensor and a transmitter, and the output signal is a signal output by the control system, such as an equipment control command.
CPU interface rules of control stations of different manufacturers are different, and specific rules for transmitting data packets can be modified according to actual needs; in fig. 4, the computer and the control station are connected to each other via a network via a switch, or a computer provided with a plurality of network ports may be used to connect the computer and the control station without providing a switch; the architectures of different control systems are different, for example, when a remote control command is sent, the remote control command may be sent to the server first, and then sent to each control station by the server.
Example 2
The embodiment of the invention discloses a high-load working condition simulation system of a nuclear power station control system, which has a schematic structure as shown in figure 5 and comprises a signal acquisition unit, a signal configuration unit, a remote control unit and a read-back judgment unit,
the signal selecting unit is used for selecting the signal needing to be changed from the control system,
the signal configuration unit is used for forming a signal configuration table according to the signal name and the signal time sequence change requirement,
the remote control unit is used for reading the signal configuration table and sending a remote control instruction to the CPUs of the control stations in the control system according to the signal configuration table so as to change the values of the corresponding signals of the control stations,
and the read-back judging unit is used for reading back the signal value of the changed control station, and reading and judging whether the CPU load, the memory allowance and the response time of the control station meet the expected requirements or not.
In a specific embodiment, the signal selection unit selects a certain number of analog quantity signals and switching value signals from a control system according to the high-load working condition simulation requirement;
wherein, the signal configuration unit forms a signal configuration table according to the signal name and the signal time sequence change requirement, and the signal configuration table specifically comprises: the signal configuration unit places the signal name in a first column or row of a signal configuration table, and sequentially places the value corresponding to each step of signal time sequence change in the corresponding column or row, thereby forming the signal configuration table;
in one embodiment, the signal configuration unit forms the signal configuration table according to the signal name and the signal timing variation requirement, and specifically includes: the signal configuration unit places the signal name in a first column or row of a signal configuration table, and sequentially places the value corresponding to each step of signal time sequence change in the corresponding column or row, thereby forming the signal configuration table;
the remote control unit changes the value of the corresponding signal of the control station, and specifically comprises: and sequentially changing the signals corresponding to the signal address and the signal type information in the data packet in each step in the control station once, so that the changed values are consistent with the corresponding signal values in the data packet until the preset step number is reached.
It should be noted that the two embodiments are based on the same principle and inventive concept, and the description is not repeated for reference.
In summary, the invention provides a high-load working condition simulation method and system for a nuclear power station control system, which select signals needing to be changed according to high-load working condition simulation requirements, form a signal configuration table according to signal time sequence change requirements, and send remote control instructions to CPUs (central processing units) of control stations according to the signal configuration table to change values of corresponding signals of the control stations, so that a large amount of changes of the signals are realized, and the high-load working condition is simulated; compared with a hard wiring method, the invention can also simulate the output signal and the network point change condition, more accurately and truly realizes the simulation of the high-load working condition, meanwhile, the hard wiring is not needed, the workload, the labor cost and the price cost are saved, in addition, the professional test script is not needed to be compiled, and the development and maintenance cost is saved.
Those skilled in the art will appreciate that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium, to instruct related hardware. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (4)
1. A high-load working condition simulation method for a nuclear power station control system is characterized by comprising the following steps:
selecting a signal to be changed from a control system, placing the name of the signal in a first column or row of a signal configuration table, and sequentially placing a value corresponding to each step of signal time sequence change in the corresponding column or row to form a signal configuration table;
reading a signal configuration table, and sending a remote control instruction to a CPU (central processing unit) of each control station in a control system according to the signal configuration table so as to change the value of a corresponding signal of the control station; sending a remote control instruction to each control station CPU in the control system according to the signal configuration table, which specifically comprises the following steps: acquiring a network address, a signal address and signal type information corresponding to the signal name from a control system database according to the signal name in a signal configuration table, generating a data packet by combining a signal value in the signal configuration table, and sending a control instruction in the form of the data packet to a control station CPU (central processing unit) corresponding to the network address information in the control system through a network;
changing the value of the corresponding signal of the control station specifically comprises: sequentially changing the signal corresponding to the signal address and the signal type information in the data packet in each step in the control station once, so that the changed value is consistent with the corresponding signal value in the data packet until the preset step number is reached;
reading back the signal value of the changed control station to confirm that the change is successful;
and after the change is successful, reading and judging whether the CPU load, the memory allowance and the response time of the control station meet the expected requirements or not so as to realize the simulation of the high-load working condition.
2. The method according to claim 1, wherein selecting the signal to be changed from the control system comprises: according to the high-load working condition simulation requirement, a certain number of analog quantity signals and switching value signals are selected from a control system.
3. A high-load working condition simulation system of a nuclear power station control system is characterized by comprising a signal acquisition unit, a signal configuration unit, a remote control unit and a readback judgment unit,
the signal selecting unit is used for selecting the signal needing to be changed from the control system,
the signal configuration unit is used for placing the signal name in the first column or row of the signal configuration table, sequentially placing the value corresponding to each step of signal time sequence change in the corresponding column or row to form the signal configuration table,
the remote control unit is used for reading the signal configuration table and sending a remote control instruction to each control station CPU in the control system according to the signal configuration table so as to change the value of the corresponding signal of the control station, and the remote control unit sends the remote control instruction to each control station CPU in the control system according to the signal configuration table, and specifically comprises: the remote control unit acquires a network address, a signal address and signal type information corresponding to the signal name from a control system database according to the signal name in the signal configuration table, generates a data packet by combining a signal value in the signal configuration table, and sends a control instruction in the form of the data packet to a control station CPU (central processing unit) corresponding to the network address information in the control system through a network; the remote control unit changes the value of the corresponding signal of the control station, and specifically comprises: sequentially changing the signal corresponding to the signal address and the signal type information in the data packet in each step in the control station once, so that the changed value is consistent with the corresponding signal value in the data packet until the preset step number is reached;
and the read-back judging unit is used for reading back the signal value of the changed control station, and reading and judging whether the CPU load, the memory allowance and the response time of the control station meet the expected requirements or not.
4. The system according to claim 3, wherein the signal selection unit selects a certain number of analog quantity signals and switching value signals from the control system according to the high-load working condition simulation requirement.
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| CN102184750B (en) * | 2011-04-11 | 2016-06-01 | 北京广利核系统工程有限公司 | A kind of nuclear plant digital I&C system test device |
| CN104751924B (en) * | 2013-12-31 | 2017-08-25 | 中核武汉核电运行技术股份有限公司 | The full factory DCS Portable debugging devices of nuclear power plant and adjustment method |
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