CN111949453A - Redundant system and switching method for pool type heat supply pile refueling machine - Google Patents
Redundant system and switching method for pool type heat supply pile refueling machine Download PDFInfo
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- CN111949453A CN111949453A CN202010673024.9A CN202010673024A CN111949453A CN 111949453 A CN111949453 A CN 111949453A CN 202010673024 A CN202010673024 A CN 202010673024A CN 111949453 A CN111949453 A CN 111949453A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to the technical field of reliability of pool type heat supply stacker reclaimers, and particularly discloses a redundancy system and a switching method of a pool type heat supply stacker reclaimer. The system comprises a power supply, a man-machine interaction device, a programmable logic controller, a sensor and a motor, wherein the man-machine interaction device is connected with a plurality of mutually redundant programmable logic controllers through an Ethernet to form a local area network; a plurality of mutually redundant sensors are simultaneously connected with each programmable logic controller; each programmable logic controller is connected with a motor on each actuating mechanism in the material replacing machine through a bus; and a plurality of power supplies which are redundant with each other are connected into the redundant system to provide power for other equipment. The system and the switching method can fully utilize hardware resources, break through obvious binding among system units, freely select unit equipment to form a complete system according to the fault state, and greatly improve the reliability of the refueling machine.
Description
Technical Field
The invention belongs to the technical field of reliability of pool type heat supply stacker reclaimers, and particularly relates to a redundancy system and a switching method of a pool type heat supply stacker reclaimer.
Background
The pool type heat supply reactor belongs to the low-temperature nuclear energy heat supply technology, and provides centralized heat supply for cities by using energy generated by nuclear fission as a heat source. The basic principle is that the heat supply parameters are improved by using the pressure of deep water, and heat exchange is realized by means of natural circulation, so that the method has the advantages of low cost, intrinsic safety, cleanness and the like.
Unlike traditional pressurized water reactors, the pool type low-temperature reactor refueling machine consists of an overwater loading and unloading machine and an underwater auxiliary loading and unloading platform. The overwater loading and unloading machine is positioned above the reactor core water pool and the spent fuel water pool, and the underwater auxiliary loading and unloading platform is arranged on an overhaul platform which is arranged at the bottom of the reactor core water pool and is underwater about 19 m. Due to the complex structure and special position of the refueling machine, the difficulty of field fault maintenance is high, the consumed time is long, once a fault occurs in the refueling operation process, the refueling operation is suspended, the refueling time is greatly increased, and even the safety of the fuel assembly is influenced. Therefore, the normal functioning of the reloader must be guaranteed by means of a redundancy method.
In the conventional redundancy method, two sets of completely identical systems (including hardware and software) are configured, only one set of the systems is used as a main system at each moment, the other set of the systems is used as a redundancy system, the running state of the main system is detected, and whether the system is switched to the redundancy system or not is determined according to the real-time state. Although the method can realize the integral redundancy switching, the switching of two sets of system composition units cannot be realized, namely the current effective system cannot be formed by randomly matching a main system part unit and a redundancy system part unit. To a certain extent, this redundancy method results in waste of resources, and the simultaneous failure of different units of the main system and the redundant system can cause failure of the equipment. For complex systems, the traditional redundancy method cannot meet the requirement of high reliability.
Disclosure of Invention
The invention aims to provide a redundant system and a switching method of a pool type heat supply pile refueling machine, which solve the problem of reliable and real-time operation of the refueling machine, ensure that the refueling machine does not have faults in the operation process of refueling operation, and ensure safe and stable operation.
The technical scheme of the invention is as follows: a redundant system of a pool type heat supply stacker reclaimer comprises a power supply, a man-machine interaction device, a programmable logic controller, a sensor and a motor, wherein the man-machine interaction device is connected with a plurality of mutually redundant programmable logic controllers through an Ethernet to form a local area network; a plurality of mutually redundant sensors are simultaneously connected with each programmable logic controller; each programmable logic controller is connected with a motor on each actuating mechanism in the material replacing machine through a bus; and a plurality of power supplies which are redundant with each other are connected into the redundant system to provide power for other equipment.
The actuating mechanism is connected with each programmable logic controller through 2 sets of mutually redundant drivers and motors.
The human-computer interaction equipment comprises first human-computer interaction equipment and second human-computer interaction equipment which are redundant with each other, and the first human-computer interaction equipment and the second human-computer interaction equipment are connected with the two programmable logic controllers which are redundant with each other through the Ethernet.
And each programmable logic controller is mutually connected through a bus.
The sensor includes, but is not limited to, an encoder, a magnetic scale, a grating scale, or a proximity switch.
The power supply comprises a direct current power supply and an alternating current power supply, wherein the direct current power supply comprises a first direct current power supply and a second direct current power supply which are redundant with each other, the alternating current power supply comprises a first alternating current power supply and a second alternating current power supply which are redundant with each other, the first direct current power supply and the second direct current power supply are connected in parallel to a redundant system, and the first alternating current power supply and the second alternating current power supply are connected in parallel to the redundant system.
A redundant switching method of a pool type heat supply stacker reclaimer comprises the following steps:
s1, carrying out fault detection on the equipment in the effective state of the redundancy system according to claim 1;
the method comprises the steps that a currently-effective programmable logic controller is used as a control center, and other equipment in an effective state in a redundant system is subjected to fault detection;
and S2, carrying out redundant equipment switching on the equipment which generates the fault and is in the effective state, and forming a new complete control system.
The step S1 of performing fault detection on the redundant system specifically includes:
s11, for the equipment with the body fault diagnosis function, utilizing the effective programmable logic controller to interact with the other effective equipment with the body fault diagnosis function, and monitoring the fault state of the equipment with the body fault diagnosis function;
and S12, monitoring the fault state of the equipment by utilizing the difference of the working input and output values of the two pieces of equipment which are redundant with each other for the equipment without the body fault diagnosis function.
A redundant switching method of a pool type heat supply stacker reclaimer comprises the following steps:
s1, counting the continuous working time and the accumulated working time of the equipment in the effective state according to the redundant system of claim 1;
and S2, when the continuous working time of the effective equipment exceeds the set threshold value, or the difference of the accumulated working time of the mutual redundant equipment exceeds the set threshold value, the redundant equipment is switched.
The step S2 specifically includes:
s21, when the continuous working time of the effective equipment exceeds the set threshold value, switching the redundant equipment;
and S22, calculating the difference of the accumulated working time between the two mutually redundant devices, and if the difference is greater than a set threshold and the currently effective device is a device with non-small accumulated working time, switching the redundant devices.
The invention has the following remarkable effects: according to the redundant system and the switching method for the pool type heat supply stacker refueling machine, hardware resources can be fully utilized, the deadplate binding among system units is broken through, unit equipment is freely selected according to a fault state to form a complete system, and the reliability of the refueling machine is greatly improved; meanwhile, the switching method can overcome the risk that the fault probability is greatly increased due to continuous long-time work or accumulated long-time work, so that the equipment can have a rest in time, and the service life and the reliability of the material replacing machine are improved.
Drawings
Fig. 1 is a schematic connection diagram of a redundant system of a heat supply pool stacker reclaimer according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, a redundant system of a pool type heat supply stacker reclaimer comprises a power supply, a human-computer interaction device, a Programmable Logic Controller (PLC), a sensor and a motor, wherein the human-computer interaction device comprises a first human-computer interaction device and a second human-computer interaction device which are redundant with each other, and is simultaneously connected with the programmable logic controller comprising the first programmable logic controller and the second programmable logic controller which are redundant with each other through an industrial ethernet to form a local area network; the man-machine interaction equipment comprises a PC (personal computer), a tablet personal computer or a touch screen, is easy to replace when being positioned on water, or is only used for observing the state of the equipment, and can cancel redundant configuration of the man-machine interaction equipment according to actual requirements; the first programmable logic controller and the second programmable logic controller are connected through an industrial bus or directly connected by using an industrial Ethernet; the sensor comprises a first sensor and a second sensor which are redundant with each other, and is simultaneously connected with the first programmable logic controller and the second programmable logic controller, wherein the sensor can be specifically an encoder, a magnetic scale, a grating scale or a proximity switch; each actuating mechanism in the refueling machine is connected with a first programmable logic controller and a second programmable logic controller through 2 sets of mutually redundant drivers and motors by utilizing an industrial bus; the power supply comprises a direct current power supply and an alternating current power supply, the direct current power supply is connected into a redundant system and provides power supply for the whole system, the direct current power supply comprises a first direct current power supply and a second direct current power supply which are redundant mutually, the alternating current power supply comprises a first alternating current power supply and a second alternating current power supply which are redundant mutually, the first direct current power supply and the second direct current power supply are connected into the redundant system in parallel, and the first alternating current power supply and the second alternating current power supply are connected into the redundant system in parallel, so that normal work of equipment is not influenced due to single power supply failure;
example 1
A redundant switching method of a pool type heat supply stacker reclaimer comprises the following steps:
s1, detecting the state of the whole system equipment;
taking the currently effective programmable logic controller as a control center, and carrying out fault detection on equipment in an effective state in the redundant system;
s11, monitoring the equipment fault state of the equipment with the body fault diagnosis function;
for devices with a body fault diagnosis function, such as a programmable logic controller, a man-machine interaction device, a driver and the like, periodic state information interaction is carried out between a first programmable logic controller and a second programmable logic controller, between an effective man-machine interaction device and an effective programmable logic controller and between an effective driver and the effective programmable logic controller, and a fault device switching command is sent out after the effective programmable logic controller receives fault information or communication failure of the effective device;
s12, monitoring the equipment fault state of the equipment without the body fault diagnosis function;
for devices without body fault diagnosis function such as sensors and the like, two mutually redundant sensors operate in effect at the same time, the difference of input signals of a first sensor and a second sensor is compared in real time, for the difference of digital input or the absolute difference of analog exceeds the limit, an alarm prompt is sent out through a human-computer interaction device, and the fault devices are confirmed through manual inspection; if the absolute difference of the analog quantity does not exceed the limit, calculating the average value of the two devices which are mutually redundant as the effective value of the control system;
s2, carrying out redundant equipment switching on the effective equipment with the fault to form a new control system;
switching any equipment which is in an effective state and has faults with the redundant equipment to reconstruct a complete system;
s21, for the equipment with the body fault diagnosis function, when the effective programmable logic controller receives the fault equipment switching command, controlling the redundant equipment to be connected into the system;
s22, for the equipment without the body fault diagnosis function, if the digital input of the two redundant equipment is different, or the absolute difference of the analog quantity exceeds the limit, manually selecting the equipment without the fault to access the system; if the absolute difference of the analog quantity does not exceed the limit, taking the average value of the processing results of the two devices which are redundant with each other or one of the processing values as the processing result of the device in the system; for example, for a first sensor and a second sensor that are redundant of each other, the position calculation may be performed by taking the average of the two sensors or taking the value of one of the sensors as the correct value.
Example 2
A redundant switching method of a pool type heat supply stacker reclaimer comprises the following steps:
s1, counting the continuous working time and the accumulated working time of the whole system equipment;
utilizing the effective programmable logic controller to count the continuous working time and the accumulated working time of each effective device of the system;
s2, when the continuous working time of the effective equipment exceeds the set threshold value, or the difference of the accumulated working time of the mutual redundant equipment exceeds the set threshold value, the redundant equipment is switched;
s21, when the continuous working time of the effective equipment exceeds the set threshold value, switching the redundant equipment;
and S22, calculating the difference of the accumulated working time between the two mutually redundant devices, and if the difference is greater than a set threshold and the currently effective device is a device with non-small accumulated working time, switching the redundant devices.
Claims (10)
1. A redundant system of a pool type heat supply stacker reclaimer is characterized by comprising a power supply, a man-machine interaction device, a programmable logic controller, a sensor and a motor, wherein the man-machine interaction device is connected with a plurality of mutually redundant programmable logic controllers through an Ethernet to form a local area network; a plurality of mutually redundant sensors are simultaneously connected with each programmable logic controller; each programmable logic controller is connected with a motor on each actuating mechanism in the material replacing machine through a bus; and a plurality of power supplies which are redundant with each other are connected into the redundant system to provide power for other equipment.
2. The redundant system of claim 1, wherein said actuator is connected to each of said plc via 2 redundant sets of drives and motors.
3. The redundant system of pool type heat supply stacker reclaimer of claim 1, wherein said human machine interactive device comprises a first human machine interactive device and a second human machine interactive device which are redundant to each other, said first human machine interactive device and said second human machine interactive device are connected with two programmable logic controllers which are redundant to each other through Ethernet.
4. The redundant system of claim 1, wherein each of the programmable logic controllers is interconnected via a bus.
5. The redundant system of a pool heat supply stacker reclaimer of claim 1, wherein said sensor is an encoder, a magnetic scale, a grating scale or a proximity switch.
6. The redundant system of claim 1, wherein the power source comprises a dc power source and an ac power source, wherein the dc power source comprises a first dc power source and a second dc power source that are redundant of each other, and the ac power source comprises a first ac power source and a second ac power source that are redundant of each other, wherein the first dc power source and the second dc power source are connected in parallel to the redundant system, and the first ac power source and the second ac power source are connected in parallel to the redundant system.
7. A redundant switching method of a pool type heat supply stacker reclaimer is characterized by comprising the following steps:
s1, carrying out fault detection on the equipment in the effective state of the redundancy system according to claim 1;
the method comprises the steps that a currently-effective programmable logic controller is used as a control center, and other equipment in an effective state in a redundant system is subjected to fault detection;
and S2, carrying out redundant equipment switching on the equipment which generates the fault and is in the effective state, and forming a new complete control system.
8. The redundancy switching method for the stacker reclaimer for supplying heat to of the pool type according to claim 7, wherein the performing the fault detection on the redundancy system in the step S1 specifically comprises:
s11, for the equipment with the body fault diagnosis function, utilizing the effective programmable logic controller to interact with the other effective equipment with the body fault diagnosis function, and monitoring the fault state of the equipment with the body fault diagnosis function;
and S12, monitoring the fault state of the equipment by utilizing the difference of the working input and output values of the two pieces of equipment which are redundant with each other for the equipment without the body fault diagnosis function.
9. A redundant switching method of a pool type heat supply stacker reclaimer is characterized by comprising the following steps:
s1, counting the continuous working time and the accumulated working time of the equipment in the effective state according to the redundant system of claim 1;
and S2, when the continuous working time of the effective equipment exceeds the set threshold value, or the difference of the accumulated working time of the mutual redundant equipment exceeds the set threshold value, the redundant equipment is switched.
10. The redundancy switching method for the stocker for pool heating according to claim 9, wherein said step S2 specifically comprises:
s21, when the continuous working time of the effective equipment exceeds the set threshold value, switching the redundant equipment;
and S22, calculating the difference of the accumulated working time between the two mutually redundant devices, and if the difference is greater than a set threshold and the currently effective device is a device with non-small accumulated working time, switching the redundant devices.
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| CN202010673024.9A CN111949453A (en) | 2020-07-14 | 2020-07-14 | Redundant system and switching method for pool type heat supply pile refueling machine |
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| CN202010673024.9A CN111949453A (en) | 2020-07-14 | 2020-07-14 | Redundant system and switching method for pool type heat supply pile refueling machine |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760882A (en) * | 2013-11-06 | 2014-04-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Complete redundancy testing apparatus control system of direct-current valve cooling unit |
| CN105938356A (en) * | 2016-01-07 | 2016-09-14 | 杭州优稳自动化系统有限公司 | Hardware redundancy and operation pace synchronization system of control module in DCS |
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- 2020-07-14 CN CN202010673024.9A patent/CN111949453A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760882A (en) * | 2013-11-06 | 2014-04-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Complete redundancy testing apparatus control system of direct-current valve cooling unit |
| CN105938356A (en) * | 2016-01-07 | 2016-09-14 | 杭州优稳自动化系统有限公司 | Hardware redundancy and operation pace synchronization system of control module in DCS |
Non-Patent Citations (2)
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| 易春辉等: "过坝通船升船机电气系统可靠性冗余方案研究", 《中国水运》, vol. 14, no. 8, pages 1 - 4 * |
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