A method, apparatus, device and medium for operating a multi-loop reactor system

Abstract

The application relates to the new energy technology field. The application discloses a multi-loop reactor system operation method, device, equipment and medium. The method comprises the following steps: acquiring multiple measurement signals of a main pump, pre-processing each measurement signal to obtain a main pump characteristic value corresponding to each measurement signal; calculating a main pump health degree according to the main pump characteristic value corresponding to each measurement signal, a pre-set main pump health degree calculation rule and a main pump characteristic reference value corresponding to each measurement signal; judging the operation state of the main pump according to the main pump health degree; and determining a system operation mode according to the mapping relationship between the operation state of the main pump and the system operation mode. The main pump health degree is calculated through multiple measurement signals of the main pump, the operation state of the main pump is judged according to the main pump health degree, and the system operation mode is further determined according to the operation state of the main pump, so that the operation of the unit is matched with the state of the main pump, and the economy and safety of the unit operation are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a multi-loop reactor system operation method, device, equipment and medium. BACKGROUND

[0002] In a nuclear power plant, multiple loops are arranged for a unit, and a main pump is arranged on each loop. The main pump is mainly used for circulating the reactor coolant between the reactor pressure vessel and the steam generator. Under normal operation of the reactor, the main pump circulates sufficient coolant for the reactor to ensure that the heat of the reactor core is timely discharged. During long-term operation of the main pump, the main pump may fail due to faults such as excessive vibration, mechanical looseness, shaft crack, bearing cavitation, etc., which may cause the reactor to shut down and affect the economy of the nuclear power plant, and even affect the safety thereof.

[0003] Therefore, how to realize the economy and safety of the unit operation according to the operation state of the main pump has been a difficult problem in the industry. SUMMARY

[0004] In view of the above problems, the embodiments of the present application provide a multi-loop reactor system operation method, device, equipment and medium, which aims to solve the above problems or at least partially solve the above problems.

[0005] In a first aspect, a multi-loop reactor system operation method is provided, comprising:

[0006] obtaining multiple measurement signals of a main pump, pre-processing each measurement signal to obtain a main pump characteristic value corresponding to each measurement signal;

[0007] calculating a main pump health degree according to the main pump characteristic value corresponding to each measurement signal, based on a pre-set main pump health degree calculation rule and a main pump characteristic reference value corresponding to each measurement signal;

[0008] judging the operation state of the main pump according to the main pump health degree;

[0009] determining a system operation mode according to a mapping relationship between the operation state of the main pump and the system operation mode.

[0010] Preferably, the obtaining multiple measurement signals of a main pump, pre-processing each measurement signal to obtain a main pump characteristic value corresponding to each measurement signal comprises:

[0011] obtaining multiple measurement signals of a main pump;

[0012] respectively filtering the multiple measurement signals of the main pump;

[0013] The filtered measurement signals of the main pump are respectively subjected to time domain analysis and frequency domain analysis, and main pump characteristic values corresponding to each of the measurement signals are calculated.

[0014] Preferably, the main pump health degree is calculated according to the main pump characteristic values corresponding to each of the measurement signals, based on a pre-set main pump health degree calculation rule and main pump characteristic reference values corresponding to each of the measurement signals, and the method comprises the following steps:

[0015] A deviation value of each of the measurement signals is calculated according to the main pump characteristic values corresponding to each of the measurement signals and the main pump characteristic reference values.

[0016] An influence factor corresponding to each of the measurement signals is obtained.

[0017] A product of the deviation value of each of the measurement signals and the influence factor corresponding thereto is calculated to obtain a deviation degree of each of the measurement signals.

[0018] A sum of the deviation degrees of the measurement signals is calculated to obtain the main pump health degree.

[0019] Preferably, the running state of the main pump is determined according to the main pump health degree, and the method comprises the following steps:

[0020] The main pump health degree is compared with a plurality of health degree ranges to determine a health degree range corresponding to the main pump health degree.

[0021] Based on a mapping relationship between the plurality of health degree ranges and the running state of the main pump, the running state of the main pump is determined according to the health degree range corresponding to the main pump health degree.

[0022] Preferably, the system running mode is determined according to the mapping relationship between the running state of the main pump and the system running mode, and the method comprises the following steps:

[0023] When the running state of the main pump is a first running state, the system running mode is determined to be a first running mode.

[0024] When the running state of the main pump is a second running state, the system running mode is determined to be a second running mode or a third running mode.

[0025] When the running state of the main pump is a third running state, the system running mode is determined to be a third running mode or a fourth running mode.

[0026] Preferably, when the running state of the main pump is the second running state or the third running state, the method further comprises the following steps:

[0027] One of the system running modes corresponding to the running state of the main pump is selected as a current system running mode.

[0028] determining a running task historical time according to a running task and historical running data;

[0029] calculating a running task estimated time according to a current system running mode;

[0030] when the running task estimated time is less than or equal to the running task historical time, determining that the system running mode is the current system running mode;

[0031] when the running task estimated time is greater than the running task historical time, determining that the system running mode is another system running mode corresponding to a running state of a main pump.

[0032] Preferably, the method further comprises:

[0033] obtaining a plurality of sliding windows in a current sampling period, and calculating a main pump health degree corresponding to each sliding window;

[0034] calculating a main pump average health degree of the plurality of sliding windows in the current sampling period according to the main pump health degree corresponding to each sliding window;

[0035] comparing a health degree range corresponding to the main pump health degree of each sliding window in the current sampling period and a health degree range corresponding to the main pump average health degree of the plurality of sliding windows with a health degree range corresponding to a main pump average health degree in a last period, to determine whether a transient state exists in a running state of the main pump.

[0036] In a second aspect, a multi-loop reactor system running device is provided, comprising:

[0037] an acquisition module configured to acquire a plurality of measurement signals of a main pump, and to pre-process each measurement signal to obtain a main pump characteristic value corresponding to each measurement signal;

[0038] a calculation module configured to calculate a main pump health degree based on a pre-set main pump health degree calculation rule and a main pump characteristic reference value corresponding to each measurement signal according to the main pump characteristic value corresponding to each measurement signal;

[0039] a judgment module configured to determine a running state of the main pump according to the main pump health degree;

[0040] a determination module configured to determine a system running mode according to a mapping relationship between the running state of the main pump and the system running mode.

[0041] In a third aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the multi-loop reactor system running method of the first aspect when executing the computer program.

[0042] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program. The computer program, when executed by a processor, implements the steps of the method for operating a multi-loop reactor system according to the first aspect.

[0043] The above at least one technical solution adopted by the embodiments of the present application can achieve the following beneficial effects:

[0044] The present application calculates the health degree of the main pump through various measurement signals of the main pump, judges the operation state of the main pump according to the health degree of the main pump, and further determines the system operation mode according to the operation state of the main pump, so as to ensure that the operation of the unit matches the state of the main pump, and realize the economy and safety of the unit operation. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application and illustrate the illustrative embodiments of the present application and its description, and do not constitute improper limitations to the present application. In the drawings:

[0046] Figure 1 is a schematic diagram of an application environment of the method for operating a multi-loop reactor system in an embodiment of the present application;

[0047] Figure 2 is a flowchart of the method for operating a multi-loop reactor system in an embodiment of the present application;

[0048] Figure 3 is a schematic diagram of the principle of a multi-loop reactor system in an embodiment of the present application;

[0049] Figure 4 is a specific flowchart of the method for operating a multi-loop reactor system in an embodiment of the present application;

[0050] Figure 5 is a structural diagram of a multi-loop reactor system operating device in an embodiment of the present application;

[0051] Figure 6 is a structural diagram of a computer device in an embodiment of the present application;

[0052] Figure 7 is another structural diagram of a computer device in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in connection with the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0054] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or a chronological sequence. It should be understood that such use can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the term "comprising" and its variants are to be interpreted as meaning "including but not limited to" an open term.

[0055] The technical solutions provided by the embodiments of the present application will be described in detail below in connection with the drawings.

[0056] As previously introduced, in the long-term operation process of the current main pump, the main pump may fail due to faults such as excessive vibration, mechanical looseness, shaft crack, bearing cavitation, etc., which can cause the reactor to shut down and affect the economy of the nuclear power plant operation, and even affect its safety. In order to solve this technical problem, the embodiments of the present application provide a multi-loop reactor system operation method.

[0057] The multi-loop reactor system operation method provided by the embodiments of the present application can be applied in an application environment such as Figure 1 , wherein the device end communicates with the service end through the network. The service end can obtain a plurality of measurement signals of the main pump through the device end, pre-process each of the measurement signals to obtain a main pump characteristic value corresponding to each of the measurement signals, calculate a main pump health degree according to the main pump characteristic value corresponding to each of the measurement signals, based on a pre-set main pump health degree calculation rule and a main pump characteristic reference value corresponding to each of the measurement signals, judge the operation state of the main pump according to the main pump health degree, and determine the system operation mode according to the mapping relationship between the operation state of the main pump and the system operation mode. The device end can be, but is not limited to, various main pump sensor devices. The service end can be implemented by an independent server or a server cluster composed of multiple servers. The present application calculates the main pump health degree through a plurality of measurement signals of the main pump, judges the operation state of the main pump according to the main pump health degree, and further determines the system operation mode according to the operation state of the main pump, so as to ensure that the operation of the unit matches the state of the main pump, and realize the economy and safety of the unit operation.

[0058] The present application will be described in detail below through specific embodiments.

[0059] Referring to Figures 2 to 4 as shown, Figure 2 A flowchart of a method for operating a multi-loop reactor system according to an embodiment of the present application is shown in FIG. 1, which comprises the following steps:

[0060] S10: obtaining a plurality of measurement signals of the main pump, and pre-processing each of the measurement signals to obtain a main pump characteristic value corresponding to each of the measurement signals.

[0061] Specifically, the plurality of measurement signals of the main pump comprises at least one of a main pump motor voltage signal, a current signal, a main pump motor cooling water temperature signal, a main pump vibration signal, and a reactor coolant system loop flow signal.

[0062] Specifically, step S10 comprises:

[0063] S11: obtaining a plurality of measurement signals of the main pump; specifically, obtaining the plurality of measurement signals of the main pump in real time within a preset time length.

[0064] S12: filtering each of the plurality of measurement signals of the main pump.

[0065] S13: performing time domain analysis and frequency domain analysis on each of the filtered plurality of measurement signals of the main pump, and calculating a main pump characteristic value corresponding to each of the measurement signals.

[0066] Specifically, the main pump characteristic value corresponding to each of the measurement signals of the main pump can be a time domain characteristic value or a frequency domain characteristic value.

[0067] Specifically, in terms of the type of the main pump characteristic value corresponding to each of the measurement signals, time domain analysis and frequency domain analysis need to be performed on each of the measurement signals, and the frequency domain characteristic and the time domain characteristic of each of the measurement signals are selected as the main pump characteristic value which best represents the operating state of the main pump.

[0068] Specifically, if the measurement signal itself can represent the operating state of the main pump, time domain analysis and frequency domain analysis can not be performed.

[0069] Specifically, peak value analysis and effective value analysis are performed on each of the measurement signals of the main pump during time domain analysis, and power spectrum analysis is performed on each of the measurement signals of the main pump during frequency domain analysis. Referring to Figure 4 as shown.

[0070] S20: calculating a main pump health degree based on the main pump characteristic value corresponding to each of the measurement signals, a pre-set main pump health degree calculation rule, and a main pump characteristic reference value corresponding to each of the measurement signals.

[0071] Specifically, the characteristic reference value of each of the measurement signals corresponds to a characteristic value of each of the measurement signals under full power normal operation of the reactor, and the health degree under full power normal operation of the reactor is set to 1.

[0072] Specifically, step S20 includes:

[0073] S21: According to the characteristic value of each of the measurement signals and the characteristic reference value of the main pump, the deviation value of each of the measurement signals is calculated and obtained;

[0074] S22: Obtain the influence factor corresponding to each of the measurement signals;

[0075] S23: Calculate the product of the deviation value of each of the measurement signals and the influence factor corresponding thereto, to obtain the deviation degree of each of the measurement signals;

[0076] S24: Calculate the sum of the deviation degrees of the plurality of measurement signals to obtain the health degree of the main pump.

[0077] Specifically, the health degree of the main pump is calculated according to the following formula:

[0078]

[0079] Wherein:

[0080] a i : the characteristic value of each of the measurement signals corresponding to the main pump;

[0081] a si : the characteristic reference value of each of the measurement signals corresponding to the main pump;

[0082] f i : the influence factor of each of the measurement signals, and the algebraic sum of the influence factors f i of all the measurement signals is 1;

[0083] H: the health degree of the main pump, the value range is [0, 1].

[0084] For example, the measurement signals include the vibration signal of the main pump, the motor current signal of the main pump, the rotation speed signal of the main pump, the bearing temperature signal of the main pump, and the stator winding temperature signal of the main pump. After filtering by a filter, time domain analysis and frequency domain analysis are performed to obtain the vibration characteristic value of the main pump, the motor current characteristic value of the main pump, the rotation speed characteristic value of the main pump, the bearing temperature characteristic value of the main pump, and the stator winding temperature characteristic value of the main pump.

[0085] a vibration deviation value between the vibration characteristic value of the main pump and a vibration characteristic reference value of the main pump is calculated, and a product of the vibration deviation value and an influence factor corresponding to a vibration signal of the main pump is calculated to obtain a vibration deviation degree; a current deviation value between the motor current characteristic value of the main pump and a motor current characteristic reference value of the main pump is calculated, and a product of the current deviation value and an influence factor corresponding to a motor current signal of the main pump is calculated to obtain a current deviation degree; a speed deviation value between the speed characteristic value of the main pump and a speed characteristic reference value of the main pump is calculated, and a product of the speed deviation value and an influence factor corresponding to a speed signal of the main pump is calculated to obtain a speed deviation degree; a bearing temperature deviation value between the bearing temperature characteristic value of the main pump and a bearing temperature characteristic reference value of the main pump is calculated, and a product of the bearing temperature deviation value and an influence factor corresponding to a bearing temperature signal of the main pump is calculated to obtain a bearing temperature deviation degree; and a winding temperature deviation value between the stator winding temperature characteristic value of the main pump and a stator winding temperature characteristic reference value of the main pump is calculated, and a product of the winding temperature deviation value and an influence factor corresponding to a stator winding temperature signal of the main pump is calculated to obtain a winding temperature deviation degree. The health degree of the main pump is equal to a sum of the vibration deviation degree, the current deviation degree, the speed deviation degree, the bearing temperature deviation degree and the winding temperature deviation degree.

[0086] The sum of the influence factor corresponding to the vibration signal of the main pump, the influence factor corresponding to the motor current signal of the main pump, the influence factor corresponding to the speed signal of the main pump, the influence factor corresponding to the stator winding temperature signal of the main pump and the influence factor corresponding to the stator winding temperature signal of the main pump is 1.

[0087] The measurement signals in the above examples only have an exemplary role and are not specifically limited to the measurement signals, which can be determined according to actual needs.

[0088] S30: determining the running state of the main pump according to the health degree of the main pump;

[0089] Specifically, the running state of the main pump includes a normal running state, a first running state, a second running state and a third running state.

[0090] Specifically, step S30 includes:

[0091] S31: comparing the health degree of the main pump with a plurality of health degree ranges to determine a health degree range corresponding to the health degree of the main pump.

[0092] Specifically, the health degree of the main pump is a value located in [0, 1], and the plurality of health degree ranges comprehensively cover [0, 1]. For example, the plurality of health degree ranges include four segments (0, 0.8], (0.8, 0.9], (0.9, 0.95] and (0.95, 1], each of which is a health degree range.

[0093] S32: judging the operation state of the main pump according to the health degree range corresponding to the main pump health degree based on a mapping relationship between a plurality of health degree ranges and the operation state of the main pump.

[0094] Specifically, the operation state of the main pump includes a normal operation state, a first operation state, a second operation state, and a third operation state, (0, 0.8] corresponds to the third operation state, (0.8, 0.9] corresponds to the second operation state, (0.9, 0.95] corresponds to the first operation state, and (0.95, 1] corresponds to the normal operation state. In actual operation, the first operation state, the second operation state, and the third operation state are related to the fault degree of the main pump, for example, the normal operation state is "normal", the first operation state is "mild fault", the second operation state is "moderate fault", and the third operation state is "severe fault". For a reactor system with multiple loops, different sections are divided according to the main pump health degree, such as (0, 0.8], (0.8, 0.9], (0.9, 0.95], and (0.95, 1]. When the main pump health degree is located in (0, 0.8], the operation state of the main pump is determined as "severe fault"; when the main pump health degree is located in (0.8, 0.9], the operation state of the main pump is determined as "moderate fault"; when the main pump health degree is located in (0.9, 0.95], the operation state of the main pump is determined as "mild fault"; and when the main pump health degree is located in (0.95, 1], the operation state of the main pump is determined as "normal". That is, the lower the main pump health degree, the more serious the fault state of the main pump.

[0095] S40: determining the system operation mode according to a mapping relationship between the operation state of the main pump and the system operation mode.

[0096] Specifically, the operation state of the main pump reflects the health degree of the main pump, and different main pump health degrees need to switch different system operation modes. The operation state of the main pump is multiple, and the system operation mode is multiple. The mapping relationship between the operation state of the main pump and the system operation mode can be one-to-one or one-to-many.

[0097] Specifically, step S40 of determining the system operation mode according to the mapping relationship between the operation state of the main pump and the system operation mode includes:

[0098] S41: when the operation state of the main pump is the first operation state, determining that the system operation mode is the first operation mode;

[0099] when the operation state of the main pump is the second operation state, determining that the system operation mode is the second operation mode or the third operation mode;

[0100] When the operation state of the main pump is the third operation state, it is determined that the system operation mode is the third operation mode or the fourth operation mode.

[0101] Specifically, when the operation state of the main pump is the first operation state, the multi-loop reactor system is automatically switched to the first operation mode. When the operation state of the main pump is the second operation state, the multi-loop reactor system is automatically switched to the second operation mode or the third operation mode, further judgment is needed, or the server pushes the early warning information to the user that the system needs to be switched to the second operation mode or the third operation mode, and the user manually switches to the second operation mode or the third operation mode according to the demand. When the operation state of the main pump is the third operation state, the multi-loop reactor system is switched to the third operation mode or the fourth operation mode, further judgment is needed, or the server pushes the early warning information to the user that the system needs to be switched to the third operation mode or the fourth operation mode, and the user manually switches to the third operation mode or the fourth operation mode according to the demand.

[0102] Specifically, when the health degree of the main pump is less than or equal to a preset value or the descending speed of the health degree of the main pump is less than or equal to a preset rate, the multi-loop reactor system directly runs in the fourth operation mode. For example, the preset value is 0.6 or the preset rate is 0.1 / h, when the health degree of the main pump is less than or equal to 0.6 or the descending speed of the health degree of the main pump is less than or equal to 0.1 / h, the reactor shutdown scheme is selected.

[0103] Specifically, when the operation state of the main pump is the second operation state or the third operation state, the method further comprises generating early warning information, the early warning information containing the operation state of the main pump and the recommended system operation mode. For example, when the operation state of the main pump is the second operation state, the recommended system operation mode is the second operation mode or the third operation mode; when the operation state of the main pump is the third operation state, the recommended system operation mode is the third operation mode or the fourth operation mode.

[0104] Specifically, after the user selects a system operation mode according to the early warning information, the method further comprises generating prompt information for confirming the switching of the system operation mode. For example, when the operation state of the main pump is the second operation state, after the user selects the system operation mode as the second operation mode, the server sends the prompt information “confirm switching to the second operation mode” to the user, and after the user confirms again, the server controls the multi-loop reactor system to run in the second operation mode.

[0105] When the operation state of the main pump is the second operation state or the third operation state, the multi-loop reactor system automatically switches the system operation mode, as shown in Figure 4 The further method further comprises:

[0106] S42: one of the system operation modes corresponding to the operation state of the main pump is selected as the current system operation mode; for example, when the operation state of the main pump is the second operation state, the switched system operation mode is automatically selected as the second operation mode or the third operation mode; when the operation state of the main pump is the third operation state, the switched system operation mode is automatically selected as the third operation mode or the fourth operation mode.

[0107] S43: according to the operation task and historical operation data, the operation task historical time t is determined;

[0108] According to the current system operation mode, the operation task estimated time t' is calculated;

[0109] Specifically, the operation task historical time is the experience time, and the multi-loop reactor system obtains some historical operation data of the time required to complete the operation task in the previous test process and the previous task execution process. These data can provide a time reference for the current task execution process. Similar operation tasks are searched for in the previous operation tasks, and the operation task historical time required to complete the current operation task is determined according to the similar operation tasks. For example, the operation time of the similar operation task to the current operation task in the historical operation data of the multi-loop reactor system is 10 days, and the operation task historical time required to complete the current operation task is determined to be 10 days.

[0110] Specifically, the operation task estimated time is the estimated time, and based on the current pressure, temperature, flow and other thermal hydraulic parameters of the multi-loop reactor system, as well as the health degree of the main pump and the current system operation mode, an operation task estimated time can be simulated and calculated.

[0111] S44: when the operation task estimated time t' is less than or equal to the operation task historical time t, the system operation mode is determined to be the current system operation mode;

[0112] When the operation task estimated time t' is greater than the operation task historical time t, the system operation mode is determined to be another system operation mode corresponding to the operation state of the main pump.

[0113] For example, when the operation state of the main pump is the second operation state, if the current system operation mode selected is the second operation mode, it is determined to operate in the second operation mode when the operation task estimated time is less than or equal to the operation task historical time; if the current system operation mode selected is the second operation mode, it is determined to operate in the third operation mode when the operation task estimated time is greater than the operation task historical time.

[0114] Specifically, in the embodiment, when the multi-loop reactor system operates in the first operation mode, the fault main pump automatically reduces the rotating speed by the first amplitude, the reactor power regulating system simultaneously reduces the reactor power, and the non-fault main pump in the loop symmetrical to the loop where the fault main pump is located simultaneously reduces the rotating speed, so that the fault main pump and the non-fault main pump in the symmetrical loop are kept to operate in a loop symmetry, and the reactor power is stabilized at a new power level. When the multi-loop reactor system operates in the second operation mode, the fault main pump automatically reduces the rotating speed by the second amplitude, and the non-fault main pump in other loops simultaneously reduces the rotating speed, and the reactor power regulating system simultaneously reduces the reactor power. When the multi-loop reactor system operates in the third operation mode, the fault main pump stops operating, the loop where the fault main pump is located is closed, the fault main pump is isolated, and a partial loop operation mode is adopted, and the reactor power regulating system converts the control parameters and operates according to the control parameters in the partial loop mode. When the multi-loop reactor system operates in the fourth operation mode, the reactor is directly shut down.

[0115] When the multi-loop reactor system operates in the first operation mode, the second operation mode or the third operation mode, the reactor power regulating system reduces the reactor power to match the flow in the multi-loop reactor system after the rotating speed of the main pump is reduced. The specific matching process can be calculated according to the loop flow after the rotating speed of the main pump is reduced, according to the pressure and temperature of the system, and the current system output power is calculated, and then the system power is adjusted to the level of the calculated current system output power, so as to avoid the fluctuation of the loop coolant pressure.

[0116] Specifically, in one embodiment, for the case that the health degree of the main pump jumps across the interval, the system should give a prompt / alarm signal. When the health degree of the main pump is less than 0.9, the server sends prompt information for whether manual operation is needed.

[0117] Specifically, in order to determine whether the health degree of the main pump jumps across the interval, the method further comprises:

[0118] S1: Obtain a plurality of sliding windows in the current sampling period, and calculate the main pump health degree corresponding to each sliding window respectively; specifically, the sampling time of each sliding window is usually tens of milliseconds. The plurality of sliding windows are continuous time.

[0119] S2: According to the main pump health degree corresponding to each sliding window, calculate the main pump average health degree of the plurality of sliding windows in the current sampling period; specifically, sum the main pump health degrees corresponding to the plurality of sliding windows, and divide by the number of sliding windows to obtain the main pump average health degree of the plurality of sliding windows in the current sampling period.

[0120] S3: Compare the health degree range corresponding to the main pump health degree of each sliding window in the current sampling period, and the health degree range corresponding to the main pump average health degree of the plurality of sliding windows, with the health degree range corresponding to the main pump average health degree in the last period, to determine whether the main pump running state has a transient. Specifically, if only the health degree range corresponding to the main pump health degree of one sliding window in the current sampling period is different from the health degree range corresponding to the main pump average health degree in the last period, the main pump health degree corresponding to this sliding window is excluded, and the main pump average health degree of the plurality of sliding windows in the current sampling period is recalculated; if the health degree range corresponding to the main pump health degree of each sliding window in the current sampling period, the main pump average health degree of the plurality of sliding windows, and the health degree range corresponding to the main pump average health degree in the last period are all different, it is determined that the main pump running state has a transient, that is, the main pump health degree has a cross-interval jump, and then a prompt signal needs to be sent to the user.

[0121] In one specific embodiment, as Figure 3As shown, the multi-loop reactor system comprises a health management system and a multi-loop reactor system operation strategy recommendation module. The health management system acquires a plurality of measurement signals of the main pump, such as temperature, vibration, pressure, flow, etc., and calculates a main pump health degree according to the plurality of measurement signals of the main pump, compares the main pump health degree with four health degree ranges in the multi-loop reactor system operation strategy recommendation module, judges the operation state of the main pump according to the comparison result, and determines the system operation mode according to the mapping relationship between the operation state of the main pump and the system operation mode. The system operation mode comprises a normal operation mode, a first operation mode, a second operation mode, a third operation mode, and a fourth operation mode. For example, the normal operation mode, the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode correspond to setting keys respectively, and the operation mode can be automatically switched or manually switched by triggering the corresponding keys by the user. When it is judged that the main pump operation state is the first operation state, the keys corresponding to the first operation mode to the fourth operation mode are lit; when it is judged that the main pump operation state is the second operation state, the keys corresponding to the second operation mode to the fourth operation mode are lit; and when it is judged that the main pump operation state is the third operation state, the keys corresponding to the third operation mode to the fourth operation mode are lit.

[0122] Specifically, the main pump health management system independently evaluates the real-time health degree of each main pump on the loop, and adjusts the operation mode of the multi-loop reactor system according to the evaluation result, so as to delay the deterioration of the health state of the main pump and improve the safety and economy of the nuclear power plant. The main pump health management system can collect, record, and store the operation data of the main pump to form a historical experience database and a real-time operation database.

[0123] Specifically, in an embodiment, the above adjustment mode is used in the case of single main pump failure in the multi-loop. If two loops fail, the positions of the two failed loops are judged. If the two failed loops are symmetrical loops, the adjustment is made according to the symmetrical loop operation mode; if the two failed loops are single-sided loops, both of which fail, or a larger failure occurs, shutdown for inspection is selected.

[0124] As can be seen, in the above scheme, the main pump health degree is calculated according to a plurality of measurement signals of the main pump, the operation state of the main pump is judged according to the main pump health degree, and the system operation mode is further determined according to the operation state of the main pump, so as to ensure that the operation of the unit matches the state of the main pump, and the economy and safety of the unit operation are realized.

[0125] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0126] In an embodiment, a multi-loop reactor system operation device is provided, which corresponds to the multi-loop reactor system operation method in the above-mentioned embodiments. As shown in Figure 5 The multi-loop reactor system operation device comprises an acquisition module 101, a calculation module 102, a judgment module 103, and a determination module 104. The functions of the modules are described in detail as follows.

[0127] The acquisition module 101 is configured to acquire a plurality of measurement signals of a main pump, pre-process each of the measurement signals, and obtain a main pump characteristic value corresponding to each of the measurement signals.

[0128] The calculation module 102 is configured to calculate a main pump health degree based on a pre-set main pump health degree calculation rule and a main pump characteristic reference value corresponding to each of the measurement signals according to the main pump characteristic value corresponding to each of the measurement signals.

[0129] The judgment module 103 is configured to judge the operation state of the main pump according to the main pump health degree.

[0130] The determination module 104 is configured to determine a system operation mode according to a mapping relationship between the operation state of the main pump and the system operation mode.

[0131] Specifically, the acquisition module 101 is further configured to,

[0132] acquire a plurality of measurement signals of a main pump;

[0133] filter each of the measurement signals of the main pump;

[0134] perform time domain analysis and frequency domain analysis on each of the filtered measurement signals of the main pump, and obtain a main pump characteristic value corresponding to each of the measurement signals.

[0135] Specifically, the calculation module 102 is further configured to,

[0136] calculate a deviation value of each of the measurement signals according to the main pump characteristic value corresponding to each of the measurement signals and a main pump characteristic reference value;

[0137] obtain an influence factor corresponding to each of the measurement signals;

[0138] calculate the product of the deviation value of each of the measurement signals and the corresponding influence factor, and obtain a deviation degree of each of the measurement signals;

[0139] calculate the sum of the deviation degrees of the plurality of measurement signals, and obtain the main pump health degree.

[0140] Specifically, the judgment module 103 is further configured to,

[0141] The main pump health degree is compared with a plurality of health degree ranges, and a health degree range corresponding to the main pump health degree is determined;

[0142] According to a mapping relationship between the plurality of health degree ranges and the operation state of the main pump, the operation state of the main pump is determined according to the health degree range corresponding to the main pump health degree.

[0143] Specifically, the determining module 104 is further configured to,

[0144] When the operation state of the main pump is the first operation state, the system operation mode is determined as the first operation mode;

[0145] When the operation state of the main pump is the second operation state, the system operation mode is determined as the second operation mode or the third operation mode;

[0146] When the operation state of the main pump is the third operation state, the system operation mode is determined as the third operation mode or the fourth operation mode.

[0147] Specifically, the determining module 104 is further configured to,

[0148] One of the system operation modes corresponding to the operation state of the main pump is selected as a current system operation mode;

[0149] According to the operation task and historical operation data, an operation task historical time is determined;

[0150] According to the current system operation mode, an operation task estimated time is calculated;

[0151] When the operation task estimated time is less than or equal to the operation task historical time, the system operation mode is determined as the current system operation mode;

[0152] When the operation task estimated time is greater than the operation task historical time, the system operation mode is determined as another system operation mode corresponding to the operation state of the main pump.

[0153] Specifically, the determining module 103 is further configured to,

[0154] A plurality of sliding windows in a current sampling period are obtained, and a main pump health degree corresponding to each sliding window is calculated respectively;

[0155] According to the main pump health degree corresponding to each sliding window, a main pump average health degree of the plurality of sliding windows in the current sampling period is calculated;

[0156] The health degree range corresponding to the main pump health degree corresponding to each sliding window in the current sampling period and the health degree range corresponding to the main pump average health degree of the plurality of sliding windows are compared with the health degree range corresponding to the main pump average health degree in the last period, to determine whether the main pump operating state has a transient.

[0157] The application provides a multi-loop reactor system operation device, which calculates the main pump health degree through a plurality of measurement signals of the main pump, judges the operating state of the main pump according to the main pump health degree, and further determines the system operation mode according to the operating state of the main pump, so as to ensure that the operation of the unit matches the state of the main pump, and realize the economy and safety of the unit operation.

[0158] The specific limitation of the multi-loop reactor system operation device can be referred to the limitation of the multi-loop reactor system operation method in the above, and will not be repeated here. Each module in the above multi-loop reactor system operation device can be realized by software, hardware and a combination thereof in whole or in part. The above modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above modules.

[0159] In one embodiment, a computer device is provided, which can be a server, and an internal structure diagram thereof can be as shown in Figure 6 The computer device includes a processor, a memory, a network interface and a database connected through a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile and / or volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with the external device side through network connection. The computer program is executed by the processor to realize the functions or steps of a multi-loop reactor system operation method server side.

[0160] In one embodiment, a computer device is provided, which can be a device side, and an internal structure diagram thereof can be as shown in Figure 7As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The network interface of the computer device is used to communicate with the external server through the network connection. The computer program is executed by the processor to realize the functions or steps of the device side of the multi-loop reactor system operation method.

[0161] In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the following steps:

[0162] Obtaining a plurality of measurement signals of the main pump, pre-processing each of the measurement signals to obtain a main pump characteristic value corresponding to each of the measurement signals;

[0163] According to the main pump characteristic value corresponding to each of the measurement signals, calculating the main pump health degree based on the pre-set main pump health degree calculation rule and the main pump characteristic reference value corresponding to each of the measurement signals;

[0164] According to the main pump health degree, judging the running state of the main pump;

[0165] According to the mapping relationship between the running state of the main pump and the system operation mode, determining the system operation mode.

[0166] In one embodiment, a computer readable storage medium is provided, which stores a computer program, the computer program being executed by a processor to implement the following steps:

[0167] Obtaining a plurality of measurement signals of the main pump, pre-processing each of the measurement signals to obtain a main pump characteristic value corresponding to each of the measurement signals;

[0168] According to the main pump characteristic value corresponding to each of the measurement signals, calculating the main pump health degree based on the pre-set main pump health degree calculation rule and the main pump characteristic reference value corresponding to each of the measurement signals;

[0169] According to the main pump health degree, judging the running state of the main pump;

[0170] According to the mapping relationship between the running state of the main pump and the system operation mode, determining the system operation mode.

[0171] It should be noted that the functions or steps described above with respect to the computer readable storage medium or the computer device can correspond to the related descriptions of the server side and the device side in the foregoing method embodiments. To avoid repetition, they will not be described one by one here.

[0172] A person of ordinary skill in the art can understand that all or part of the processes in the foregoing method embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a nonvolatile computer readable storage medium. When the computer program is executed, the processes of the foregoing embodiments of the method can be included. Any reference to memory, storage, database or other medium used in each embodiment provided in the present application can include nonvolatile and / or volatile memory. The nonvolatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. The volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM) and memory bus dynamic RAM (RDRAM) and the like.

[0173] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified. In actual applications, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above.

[0174] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features. Such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for operating a multi-loop reactor system, characterized in that: include: Acquire multiple measurement signals of the main pump, pre-process each measurement signal, and obtain a main pump characteristic value corresponding to each measurement signal; The acquiring of multiple measurement signals of the main pump, preprocessing each measurement signal, and obtaining a main pump characteristic value corresponding to each measurement signal includes: Obtain various measurement signals of the main pump; performing filtering processing on the various measurement signals of the main pump respectively; Performing time domain analysis and frequency domain analysis on the filtered multiple measurement signals of the main pump, and calculating and obtaining the main pump characteristic value corresponding to each measurement signal; Calculating the health of the main pump according to the main pump characteristic value corresponding to each of the measurement signals, based on a preset main pump health calculation rule and the main pump characteristic reference value corresponding to each of the measurement signals; Determining the operating status of the main pump according to the health of the main pump; determining a system operating mode according to a mapping relationship between the operating state of the main pump and the system operating mode; Determining the system operation mode according to the mapping relationship between the operation state of the main pump and the system operation mode includes: When the operating state of the main pump is the first operating state, determining the system operating mode to be the first operating mode; When the operating state of the main pump is the second operating state, determining that the system operating mode is the second operating mode or the third operating mode; When the operating state of the main pump is the third operating state, determining that the system operating mode is the third operating mode or the fourth operating mode; When the operating state of the main pump is the second operating state or the third operating state, the method further includes: Selecting one of the system operation modes corresponding to the operation state of the main pump as the current system operation mode; Determine the historical time of the running task based on the running task and historical running data; Calculate the estimated time of running tasks based on the current system operation mode; When the estimated time of the task operation is less than or equal to the historical time of the task operation, determining that the system operation mode is the current system operation mode; When the estimated time of the running task is greater than the historical time of the running task, determining that the system running mode is another system running mode corresponding to the running state of the main pump; The first operating state is a mild fault, the second operating state is a moderate fault, and the third operating state is a severe fault; When the multi-loop reactor system operates in the first operating mode, the faulty main pump automatically reduces its speed by a first amplitude, the reactor power regulation system reduces the reactor power at the same time, and the non-faulty main pumps in the loop symmetrical to the loop where the faulty main pump is located reduce their speeds at the same time, so that the faulty main pump and the non-faulty main pumps in the symmetrical loop maintain loop symmetrical operation, and the reactor power stabilizes at a new power level; when the multi-loop reactor system operates in the second operating mode, the faulty main pump automatically reduces its speed by a second amplitude, the non-faulty main pumps in other loops reduce their speeds at the same time, and the reactor power regulation system reduces the reactor power at the same time; when the multi-loop reactor system operates in the third operating mode, the faulty main pump stops running, the loop where the faulty main pump is located is closed, the faulty main pump is isolated, and a biased loop operation mode is adopted. The reactor power regulation system converts the control parameters and operates according to the control parameters in the biased loop mode; when the multi-loop reactor system operates in the fourth operating mode, the reactor is directly shut down.

2. A multi-loop reactor system operating method according to claim 1, characterized in that: Calculating the health of the main pump according to the main pump characteristic value corresponding to each of the measurement signals, based on a preset main pump health calculation rule and a main pump characteristic reference value corresponding to each of the measurement signals, includes: Calculate the deviation value of each measurement signal according to the main pump characteristic value corresponding to each measurement signal and the main pump characteristic reference value; Obtaining an impact factor corresponding to each of the measurement signals; Calculating the product of the deviation value of each measurement signal and its corresponding influencing factor to obtain the deviation degree of each measurement signal; The sum of the deviations of the plurality of measurement signals is calculated to obtain the health status of the main pump.

3. The method for operating a multi-loop reactor system according to claim 1, wherein: The determining the operating status of the main pump according to the health of the main pump includes: comparing the health of the main pump with a plurality of health ranges to determine a health range corresponding to the health of the main pump; Based on a mapping relationship between a plurality of health ranges and the operating state of the main pump, the operating state of the main pump is determined according to the health range corresponding to the health of the main pump.

4. The method for operating a multi-loop reactor system according to claim 1, wherein: The method further comprises: Obtain multiple sliding windows within the current sampling period and calculate the health of the main pump corresponding to each sliding window; According to the health status of the main pump corresponding to each sliding window, the average health status of the main pump of multiple sliding windows in the current sampling period is calculated; The health range corresponding to the health of the main pump corresponding to each sliding window in the current sampling period and the health range corresponding to the average health of the main pump across multiple sliding windows are compared with the health range corresponding to the average health of the main pump in the previous period to determine whether there is a transient change in the operating status of the main pump.

5. A multi-loop reactor system operating device, characterized in that: include: An acquisition module is used to acquire multiple measurement signals of the main pump, pre-process each measurement signal, and obtain a main pump characteristic value corresponding to each measurement signal; a calculation module, configured to calculate the health of the main pump according to the main pump characteristic value corresponding to each of the measurement signals, based on a preset main pump health calculation rule and the main pump characteristic reference value corresponding to each of the measurement signals; The calculation module is further used to obtain multiple measurement signals of the main pump; and filter the multiple measurement signals of the main pump respectively; Performing time domain analysis and frequency domain analysis on the filtered multiple measurement signals of the main pump, and calculating and obtaining the main pump characteristic value corresponding to each measurement signal; a judgment module, configured to judge the operating status of the main pump according to the health of the main pump; a determination module, configured to determine a system operation mode according to a mapping relationship between the operation state of the main pump and the system operation mode; The determination module is further used to determine that the system operation mode is the first operation mode when the operation state of the main pump is the first operation state; determine that the system operation mode is the second operation mode or the third operation mode when the operation state of the main pump is the second operation state; determine that the system operation mode is the third operation mode or the fourth operation mode when the operation state of the main pump is the third operation state, wherein the first operation state is a mild fault, the second operation state is a moderate fault, and the third operation state is a severe fault. When the multi-loop reactor system operates in the first operation mode, the faulty main pump automatically reduces the speed by a first amplitude, and the reactor power regulation system reduces the reactor power at the same time, and the loop in the loop symmetrical to the loop where the faulty main pump is located is The non-faulty main pumps reduce their rotation speeds simultaneously, so that the faulty main pumps and the non-faulty main pumps in the symmetrical loop maintain symmetrical operation, and the reactor power stabilizes at a new power level; when the multi-loop reactor system operates in the second operating mode, the faulty main pump automatically reduces its rotation speed by a second amplitude, and the non-faulty main pumps in other loops reduce their rotation speeds at the same time, and the reactor power regulation system reduces the reactor power at the same time; when the multi-loop reactor system operates in the third operating mode, the faulty main pump stops running, the loop where the faulty main pump is located is closed, the faulty main pump is isolated, and a partial loop operation mode is adopted. The reactor power regulation system converts the control parameters and operates according to the control parameters in the partial loop mode; when the multi-loop reactor system operates in the fourth operating mode, the reactor is directly shut down; The determination module is also used to select one of the system operation modes corresponding to the operating status of the main pump as the current system operation mode; determine the operating task history time based on the operating task and historical operating data; calculate the operating task estimated time based on the current system operation mode; when the operating task estimated time is less than or equal to the operating task history time, determine the system operation mode as the current system operation mode; when the operating task estimated time is greater than the operating task history time, determine the system operation mode as another system operation mode corresponding to the operating status of the main pump.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the multi-loop reactor system operating method according to any one of claims 1 to 4 are implemented.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the multi-loop reactor system operating method according to any one of claims 1 to 4 are implemented.

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