CN107291062B - Logic function test device for nuclear-level digital instrument control system of pressurized water reactor nuclear power plant - Google Patents
Logic function test device for nuclear-level digital instrument control system of pressurized water reactor nuclear power plant Download PDFInfo
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- CN107291062B CN107291062B CN201710212672.2A CN201710212672A CN107291062B CN 107291062 B CN107291062 B CN 107291062B CN 201710212672 A CN201710212672 A CN 201710212672A CN 107291062 B CN107291062 B CN 107291062B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0256—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults injecting test signals and analyzing monitored process response, e.g. injecting the test signal while interrupting the normal operation of the monitored system; superimposing the test signal onto a control signal during normal operation of the monitored system
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Abstract
The invention belongs to the field of reliability detection of a nuclear process control system, and particularly relates to a logic function test device of a nuclear-level digital instrument control system of a pressurized water reactor nuclear power plant. The logic function test device of the nuclear digital instrument control system of the pressurized water reactor nuclear power plant comprises an upper computer, a switch, a printer and a network connection medium; the device adopts a device structure based on a network communication mode. Before executing the logic function test, the special test device is connected to the KCS, and after the test is completed, the communication connection between the special test device and the KCS is disconnected. And the test network is relatively independent from the network in normal operation, and the independent communication card is used, so that the security of KCS is ensured.
Description
Technical Field
The invention belongs to the field of reliability detection of a nuclear process control system, and particularly relates to a logic function test device of a nuclear-level digital instrument control system of a pressurized water reactor nuclear power plant.
Background
The nuclear level digital instrument control system (hereinafter referred to as KCS) is an important safety system in the digital instrument control system of the nuclear power plant, and has the main functions of preventing or relieving the damage of the reactor core and the coolant system components, protecting the integrity of three large nuclear safety barriers, avoiding the escape of a large amount of radioactive substances, protecting the surrounding environment of the nuclear power plant from being polluted and protecting personnel safety by stopping the reactor and/or starting special safety facilities under abnormal or accident conditions.
According to related regulation and guidance requirements of nuclear power, in order to ensure the reliability of the nuclear level digital instrument control system, the logic function of the nuclear level digital instrument control system needs to be tested regularly. In view of the strong system self-checking function of the KCS system, the engineering design generally does not consider the special periodic test of the logic function, so that the special periodic test device is not designed. The self-diagnosis of the KCS system can not completely cover the diagnosis of the logic state of software and can not be checked on the hard wiring of signals existing in the system, so that the design of a special KCS logic function periodic test device is very necessary. The purpose of the periodic test of the logic functions of the nuclear-level digital instrument control system is to verify the correctness of the logic and signal loops inside the KCS controller, and the test range comprises reactor shutdown logic, safety special drive logic and hard-wired connection for data exchange among the KCS controllers.
The logic function periodic test is executed during the unit shutdown reloading overhaul period, the traditional test device adopts the modes of injecting analog signals and collecting analog signals, the test risk is high, the manual operation amount is large, the automation level is low, larger pressure is brought to a time window and manpower during the overhaul period, and meanwhile, larger safety risk is also brought. To above problem, this patent has developed a plurality of technological thinking for experimental implementation is safer, quick, convenient, high-efficient.
Disclosure of Invention
The technical problem to be solved by the invention is to develop a device special for logic function test of a nuclear-level digital instrument control system, which can realize effective detection of related logic functions and hard-wired connection at regular intervals and ensure the reliable operation of KCS. Meanwhile, the device needs to have the characteristics of safety, portability, usability and rapidness.
In order to achieve the purpose, the invention adopts the following technical scheme:
the logic function test device of the nuclear-level digital instrument control system of the pressurized water reactor nuclear power plant is applied to a nuclear-level digital control system, and the nuclear-level digital control system is divided into four channels participating in shutdown protection signal processing, wherein each channel comprises two shutdown subgroups; and two columns participating in the dedicated security facility driver, each column comprising two dedicated logical processing subgroups and one dedicated data processing subgroup;
the four channels and the two columns are divided into 14 subgroups according to functions, and each subgroup consists of a main controller and a plurality of expansion controllers; communication in each subgroup is realized by adopting hard wiring and optical fiber modes;
the logic function test device of the nuclear digital instrument control system of the pressurized water reactor nuclear power plant comprises an upper computer, a switch, a printer and a network connection medium;
(1) The functions of the upper computer comprise the following aspects:
1) Providing a human-machine interface: selecting a subgroup object to be subjected to a logic test, monitoring the test progress, and obtaining a test result;
2) Establishing initial conditions of the test: checking a system and establishing an initial working condition before a test;
3) The protection logic in the main controller and the expansion controller of each subgroup is automatically tested, wherein the automatic test comprises the following steps: injecting test signals, reading test results, comparing with expected results and recovering the test;
4) Generating test records: all operations in the test process are recorded in a log, including test operation records and test result records;
(2) Printer with a printer body
The printer is connected with the upper computer through a network connection medium and is used for printing test records;
(3) Switch board
The functional module of the switch is a photoelectric conversion module, and the upper computer and the main controllers of the 14 subgroups are connected with each other through a network connection medium by the switch, so that signal exchange between the upper computer and the main controllers of the 14 subgroups is realized.
Furthermore, as described above, the logic function test device for the nuclear level digital instrument control system of the pressurized water reactor nuclear power plant adopts a special communication protocol for communication between the upper computer and the main controllers of 14 subgroups, realizes full-type variable control of the nuclear level digital control system through the special communication protocol, and automatically simulates the field instrument signals acquired by the main controllers of the subgroups on the device; the script on the device is operated to combine the special communication protocol, so that the control and test result comparison of signals in the 14 subgroups of main controllers are realized.
Furthermore, the logic function test device of the nuclear-level digital instrument control system of the pressurized water reactor nuclear power plant adopts one of optical fibers and network cables as a network connection medium.
Under the condition that the technical route is not adopted, the implementation of the KCS logic function test needs to manually inject analog signals, manually collect feedback signals and manually compare the analog signals, six engineers and six engineer stations are required to work simultaneously at least, a week is required at least for a test window, the labor and time cost is high, and the automation level is low. The special test resources mentioned in the patent are an engineer and a set of special test device, and the construction period required for completing all logic tests is only one day.
The technical scheme of the invention has the remarkable effects that:
(1) And the signal injection and the signal acquisition are realized by adopting a communication protocol. When the controller is in a programming mode, the special test device can access and force all types of variables in the TRICON controller, and the injection of test signals and the collection of test results are concentrated on one test special computer, so that the automatic injection of the test signals is realized, and the device is simplified.
(2) The device structure based on the network communication mode is adopted. Before executing the logic function test, the special test device is connected to the KCS, and after the test is completed, the communication connection between the special test device and the KCS is disconnected. And the test network is relatively independent from the network in normal operation, and the independent communication card is used, so that the security of KCS is ensured.
(3) The test software interface is simple, the test script is strong in readability, and the human error risk introduced by the periodic test can be fully avoided. By using the test script, the automatic judgment of the test result is realized, the logic function test can be automatically, conveniently and efficiently executed, and a large amount of manpower and time are liberated.
(4) The internal logic and hard-wired connections of the KCS are fully verified, ensuring the availability of the KCS.
Drawings
FIG. 1 is a schematic diagram of a test device connection dedicated to KCS function test;
FIG. 2 is a KCS logic function test flow chart.
In the figure: 1-an upper computer; a 2-printer; 3-exchanger; a master controller in the 4-channel; 5-master controller in column.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and specific embodiments.
The logic function test device of the nuclear level digital instrument control system of the pressurized water reactor nuclear power plant is applied to a nuclear level digital control system, and the nuclear level digital control system is divided into four channels participating in shutdown protection signal processing, wherein each channel comprises two shutdown subgroups; and two columns participating in the dedicated security facility driver, each column comprising two dedicated logical processing subgroups and one dedicated data processing subgroup;
the four channels and the two columns are divided into 14 subgroups according to functions, and each subgroup consists of a main controller and a plurality of expansion controllers; communication in each subgroup is realized by adopting hard wiring and optical fiber modes;
the method is characterized in that: the logic function test device of the nuclear digital instrument control system of the pressurized water reactor nuclear power plant comprises an upper computer, a switch, a printer and a network connection medium;
(1) The functions of the upper computer comprise the following aspects:
1) Providing a human-machine interface: selecting a subgroup object to be subjected to a logic test, monitoring the test progress, and obtaining a test result;
2) Establishing initial conditions of the test: checking a system and establishing an initial working condition before a test;
3) The protection logic in the main controller and the expansion controller of each subgroup is automatically tested, wherein the automatic test comprises the following steps: injecting test signals, reading test results, comparing with expected results and recovering the test;
4) Generating test records: all operations in the test process are recorded in a log, including test operation records and test result records;
the communication between the upper computer and the main controllers of 14 subgroups adopts a special communication protocol, the full-type variable control of the nuclear digital control system is realized through the special communication protocol, and the field instrument signals acquired by the main controllers of the subgroups are automatically simulated on the device; the script on the device is operated to combine the special communication protocol, so that the control and test result comparison of signals in the 14 subgroups of main controllers are realized.
(2) Printer with a printer body
The printer is connected with the upper computer through a network connection medium and is used for printing test records;
(3) Switch board
The functional module of the switch is a photoelectric conversion module, and the upper computer and the main controllers of the 14 subgroups are connected with each other through a network connection medium by the switch, so that signal exchange between the upper computer and the main controllers of the 14 subgroups is realized.
(4) Network connection medium
The network connection medium adopts one of optical fiber and network cable.
And selecting a corresponding script on the man-machine interaction interface, and only carrying out a test of one control system at a time. Taking a protection channel-channel subset-control system (abbreviated as CH 11) as an example, a logic function test flow chart is shown in fig. 2, and the main idea is as follows:
1) Automatic check of system state before test: the controller is switched to a PROGRAME mode, a system checking script is run, the variable value in the system is read and compared with the initial test condition value, and if the variable value is consistent with the initial test condition value, the test condition is met, and the next step is carried out; otherwise, reporting errors and prompting variables which do not meet the test conditions. And an operator can check and process the prompted variable which does not meet the test condition until the test condition is met.
2) One-key initialization test state: by running an initialization script, after the initialization script is executed, two functions can be realized: firstly, the output signal in the locking controller ensures that the protection signal is not triggered by mistake in the whole test process, so that the safety equipment is damaged; secondly, automatically setting the related variable value of the test to a specific state, so as to meet the initialization requirement of the subsequent test signals;
3) Automated and optional execution of test scripts: according to the function division of the protection system, aiming at a single subgroup, compiling a plurality of function test scripts; execution modes can be divided into two types: one is a single functional test within a subgroup; one is an optional functional test that may enable verification of multiple or all functional scripts within a subset by clicking on a desired test script at a client;
4) And (3) test process control: taking a plurality of functional test scripts in the subgroup as an example, in the test process, the upper computer automatically runs the scripts, changes related variables through communication signals, automatically collects test results, compares the test results with expected values, prompts successful running of the scripts if the test is passed, resets the software automatic reset signals to an initial state, and performs the next group of functional script tests; if the test result is incorrect in the process of a certain group of functional test scripts, the test is terminated, the system is restored to the initial state, and meanwhile, an abnormal signal is given in the test process. The log file form record of the whole test process is used for the test personnel to analyze the test process and the fault cause;
5) Automated system recovery: after the test is finished, the system recovery script is run, signals generated by initialization in the controller are recovered, and all signal states in the controller are recovered to the state before the test.
6) All script execution results corresponding to one subgroup are "pass" which means that the logical function test of the current subgroup passes. The 14 subgroup logic function tests were completed by representing KCS logic function tests. The test results may be printed out in a prescribed format and archived as part of the test report file.
The device is used for logic function test of a nuclear digital instrument control system (KCS system) of a pressurized water reactor nuclear power plant, the test device adopts a communication mode, the reliability is high, the automation degree of the test process is high, the reliability of KCS can be rapidly and effectively judged, the operability of a fault detection and protection system is checked, and the safe and stable operation of a unit is ensured.
The device is simple to operate, and the program can automatically execute detection by connecting the device with a switch of the KCS and sequentially executing corresponding scripts. In the detection process, all output signals in the controller are locked, so that misoperation of the system can not be caused, and the safety is high. If a problem is found in the detection process, a log file can be automatically generated, so that an engineer can conveniently conduct real-time fault detection, and a signal in the controller automatically restores to a state before the test starts after the script execution is completed.
The device is a notebook computer carrying corresponding software, can be directly brought into a nuclear power station working site, realizes quick and accurate execution of KCS logic function test during overhaul, shortens the overhaul period, and saves manpower and material resources.
The test network used by the device is relatively independent of the network in normal operation of the KCS, the test script is strong in readability, and the extra risk of the periodic test on the unit can be fully avoided.
Claims (2)
1. The logic function test device of the nuclear-level digital instrument control system of the pressurized water reactor nuclear power plant is applied to a nuclear-level digital control system, and the nuclear-level digital control system is divided into four channels participating in shutdown protection signal processing, wherein each channel comprises two shutdown subgroups; and two columns participating in the dedicated security facility driver, each column comprising two dedicated logical processing subgroups and one dedicated data processing subgroup;
the four channels and the two columns are divided into 14 subgroups according to functions, and each subgroup consists of a main controller and a plurality of expansion controllers; communication in each subgroup is realized by adopting hard wiring and optical fiber modes;
the method is characterized in that: the logic function test device of the nuclear digital instrument control system of the pressurized water reactor nuclear power plant comprises an upper computer, a switch, a printer and a network connection medium;
(1) The functions of the upper computer comprise the following aspects:
1) Providing a human-machine interface: selecting a subgroup object to be subjected to a logic test, monitoring the test progress, and obtaining a test result;
2) Establishing initial conditions of the test: checking a system and establishing an initial working condition before a test; by running an initialization script, after the initialization script is executed, two functions can be realized: firstly, the output signal in the locking controller ensures that the protection signal is not triggered by mistake in the whole test process, so that the safety equipment is damaged; secondly, automatically setting the related variable value of the test to a specific state, so as to meet the initialization requirement of the subsequent test signals;
3) The protection logic in the main controller and the expansion controller of each subgroup is automatically tested, wherein the automatic test comprises the following steps: injecting test signals, reading test results, comparing with expected results and recovering the test; automated and optional execution of test scripts: according to the function division of the protection system, aiming at a single subgroup, compiling a plurality of function test scripts; execution modes can be divided into two types: one is a single functional test within a subgroup; one is an optional functional test that may enable verification of multiple or all functional scripts within a subset by clicking on a desired test script at a client;
4) Generating test records: all operations in the test process are recorded in a log, including test operation records and test result records;
(2) Printer with a printer body
The printer is connected with the upper computer through a network connection medium and is used for printing test records;
(3) Switch board
The functional module of the switch is a photoelectric conversion module, and the upper computer and the main controllers of the 14 subgroups are connected with each other through a network connection medium by the switch, so that signal exchange between the upper computer and the main controllers of the 14 subgroups is realized;
the communication between the upper computer and the main controllers of 14 subgroups adopts a special communication protocol, the full-type variable control of the nuclear digital control system is realized through the special communication protocol, and the field instrument signals acquired by the main controllers of the subgroups are automatically simulated on the device; the script on the device is operated to combine with the special communication protocol, so that the control and test result comparison of signals in the main controllers of 14 subgroups are realized;
2. the logic function test device of the nuclear digital instrument control system of the pressurized water reactor nuclear power plant as set forth in claim 1, wherein: the network connection medium adopts one of optical fiber and network cable.
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| CN107884672B (en) * | 2017-10-30 | 2019-12-20 | 福建福清核电有限公司 | Periodic test method for nuclear power plant reactor protection system connection loop |
| CN110688297A (en) * | 2019-02-25 | 2020-01-14 | 上海核工程研究设计院有限公司 | Automatic test method for computational logic configuration |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11112658A (en) * | 1997-09-30 | 1999-04-23 | Fujitsu Ltd | Method and system for controlling test of exchange |
| CN1265220A (en) * | 1997-06-06 | 2000-08-30 | Abb燃烧工程核力公司 | Digital engineered safety features actuation system |
| CN101877250A (en) * | 2010-05-31 | 2010-11-03 | 中国核动力研究设计院 | Rod position processing device of nuclear power station control rod based on PLC (Programmable Logic Controller) platform |
| CN103324676A (en) * | 2013-05-27 | 2013-09-25 | 中国核电工程有限公司 | Routine test upstream file designing method for nuclear power plant |
| CN104240781A (en) * | 2013-11-07 | 2014-12-24 | 中广核工程有限公司 | Signal distribution method and signal distribution system of digital instrument control system (DCS) of nuclear power plant |
| CN204101911U (en) * | 2014-07-07 | 2015-01-14 | 北京广利核***工程有限公司 | A kind of maintenance system for nuclear safe level digitizer Ore-controlling Role equipment |
| CN104898638A (en) * | 2015-03-30 | 2015-09-09 | 北京广利核***工程有限公司 | Periodic test device for pressurized water reactor nuclear power plant protection system |
| CN106340332A (en) * | 2016-10-13 | 2017-01-18 | 中广核工程有限公司 | Nuclear power station digital protection control system |
| CN106411870A (en) * | 2016-09-20 | 2017-02-15 | 中国核动力研究设计院 | Digital reactivity meter |
| CN106405277A (en) * | 2016-08-26 | 2017-02-15 | 北京广利核***工程有限公司 | Test device of main processing unit of nuclear power station protection system and test method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8275404B2 (en) * | 2008-10-29 | 2012-09-25 | Google Inc. | Managing and monitoring emergency services sector resources |
-
2017
- 2017-04-01 CN CN201710212672.2A patent/CN107291062B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265220A (en) * | 1997-06-06 | 2000-08-30 | Abb燃烧工程核力公司 | Digital engineered safety features actuation system |
| JPH11112658A (en) * | 1997-09-30 | 1999-04-23 | Fujitsu Ltd | Method and system for controlling test of exchange |
| CN101877250A (en) * | 2010-05-31 | 2010-11-03 | 中国核动力研究设计院 | Rod position processing device of nuclear power station control rod based on PLC (Programmable Logic Controller) platform |
| CN103324676A (en) * | 2013-05-27 | 2013-09-25 | 中国核电工程有限公司 | Routine test upstream file designing method for nuclear power plant |
| CN104240781A (en) * | 2013-11-07 | 2014-12-24 | 中广核工程有限公司 | Signal distribution method and signal distribution system of digital instrument control system (DCS) of nuclear power plant |
| CN204101911U (en) * | 2014-07-07 | 2015-01-14 | 北京广利核***工程有限公司 | A kind of maintenance system for nuclear safe level digitizer Ore-controlling Role equipment |
| CN104898638A (en) * | 2015-03-30 | 2015-09-09 | 北京广利核***工程有限公司 | Periodic test device for pressurized water reactor nuclear power plant protection system |
| CN106405277A (en) * | 2016-08-26 | 2017-02-15 | 北京广利核***工程有限公司 | Test device of main processing unit of nuclear power station protection system and test method |
| CN106411870A (en) * | 2016-09-20 | 2017-02-15 | 中国核动力研究设计院 | Digital reactivity meter |
| CN106340332A (en) * | 2016-10-13 | 2017-01-18 | 中广核工程有限公司 | Nuclear power station digital protection control system |
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