A method and system for regulating and optimizing a boric acid solution supply circuit of a reactor

Abstract

The present invention relates to a method and system for optimizing the regulation of a boric acid solution supply circuit in a reactor, comprising the following steps: adjusting the response parameters of a detection device to obtain adjustment parameters; selecting the regulation parameters of a regulation module; optimizing the boric acid solution supply circuit to obtain an optimized regulation logic; and regulating the boric acid solution supply circuit based on the optimized regulation logic and according to the adjustment parameters and the regulation parameters. By adjusting and optimizing the response parameters of the detection device, the regulation parameters of the regulation module, and the boric acid solution supply circuit, the present invention enables the normal regulation of the boric acid solution supply under different flow conditions without triggering an abnormal boric acid flow alarm. Additionally, the present invention also solidifies the parameters during initial commissioning, eliminating the need for maintenance personnel to make real-time adjustments, thereby avoiding the situation where emergency conditions cannot be adjusted in a timely manner, which may affect the normal control of the boric acid solution supply to the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of reactors, and more specifically, to a method and system for regulating and optimizing a boric acid solution supply circuit of a reactor. Background Art

[0002] The boric acid solution supply circuit of the boron and water supply system of a reactor is an important system of a nuclear power unit and has a significant impact on the control of the reactivity of the primary circuit. During the verification of the availability of this system, it is required that the system be stable in manual mode, automatic supply mode, and boration mode and meet the requirements of various test criteria. The boron supply regulation circuit is mainly regulated by a boric acid supply flow control valve. The operator calculates the volume of boric acid that needs to be injected into the primary circuit based on the expected boron concentration after boration of the primary circuit, the original boron concentration, and the boron concentration in the boric acid storage tank of the reactor boron and water supply system (REA), calculates the flow rate of boric acid injection according to the requirement of the boration rate, and then issues a "boration" command. The following actions are then carried out automatically and simultaneously:

[0003] - Start a boric acid transfer pump;

[0004] - Issue a command to allow the boric acid supply flow control valve to open. Its regulator then compares the flow rate set value with the actual flow rate measured by the boric acid flow meter and adjusts its opening degree;

[0005] - Open the boric acid supply outlet isolation valve;

[0006] - The instrument for calculating the boric acid injection volume based on the output of the boric acid supply flow meter starts to work.

[0007] - When the injected volume of boric acid reaches the predetermined value, the boric acid transfer pump stops automatically, and the boric acid supply regulating valve and the outlet isolation valve close automatically.

[0008] Among them, during the boric acid supply process, if the deviation between the actual boric acid flow rate and the set flow rate is greater than 300 liters per hour and lasts for 30 seconds, it will be considered that there is an abnormality in the boric acid supply regulation system, a boron flow abnormality alarm will be generated, and the boration supply logic will stop automatically.

[0009] Since the boric acid supply process has different requirements for the boric acid circuit supply flow rate at different boric acid concentrations in the reactor, the control of the boric acid solution supply regulation process is difficult. Especially after the required flow rate changes, it is relatively easy to accidentally trigger an alarm situation, resulting in abnormal stoppage of the boric acid solution supply.

[0010] In the existing technical solution, before the boric acid solution supply circuit starts to supply, due to the integral effect, the boric acid supply regulating valve will be fully opened. Each time the supply mode is started, the regulating valve starts to adjust from 100% opening and needs to adjust the flow rate to the corresponding set value within 30 seconds. Due to the large initial flow rate, the high-flow regulation is relatively stable, but flow deviation alarms are likely to occur under low-flow conditions, thus stopping the boric acid supply.

[0011] In response to the above situation, the existing technical solutions are mainly divided into the following two types: one is to limit the opening output of the regulating valve at low flow rates, and the other is to adjust the regulation parameters in real time under different working conditions.

[0012] The first solution cannot achieve the supply of boric acid solution under different flow conditions. After the flow rate is adjusted, the boric acid solution supply regulation frequently triggers boron flow abnormal alarms, thus stopping the boric acid supply. When the second solution is implemented, maintenance personnel need to adjust in real time under different flow conditions, which is time-consuming and laborious. The adjustment verification process is cumbersome, and it cannot be adjusted in a timely manner under emergency conditions, thus affecting the unit control. Summary of the Invention

[0013] The technical problem to be solved by the present invention is to provide an optimization method and system for regulating a reactor boric acid solution supply circuit in view of the defects of the existing technology.

[0014] The technical solution adopted by the present invention to solve its technical problems is: to construct an optimization method for regulating a reactor boric acid solution supply circuit, including the following steps:

[0015] Adjust the response parameters of the detection device to obtain adjustment parameters;

[0016] Select the regulation parameters of the regulation module;

[0017] Optimize the boric acid solution supply circuit to obtain an optimized regulation logic;

[0018] Based on the optimized regulation logic, and according to the adjustment parameters and the regulation parameters, regulate the boric acid solution supply circuit.

[0019] In the optimization method for regulating a reactor boric acid solution supply circuit of the present invention, the step of adjusting the response parameters of the detection device to obtain adjustment parameters includes:

[0020] Obtain the damping parameter of the detection device;

[0021] Based on the damping parameter, adjust the output value of the detection device, and when the output value of the detection device meets the corresponding process operation environment, obtain the optimal damping parameter; the optimal damping parameter is the adjustment parameter.

[0022] In the method for adjusting and optimizing the reactor boric acid solution supply loop according to the present invention, the damping parameters include: a filtering constant, a response coefficient, and a response threshold;

[0023] The adjustment of the output value of the detection device based on the damping parameters includes:

[0024] Determine the parameters participating in the operation according to the effective conditions of the filtering constant and the response coefficient; the parameters participating in the operation are the filtering constant or the response coefficient;

[0025] Perform calculations based on the parameters participating in the operation to obtain the initial value of the detection device;

[0026] Perform filtering based on the initial value and the values of the previous 12 cycles to obtain the output value of the detection device.

[0027] In the method for adjusting and optimizing the reactor boric acid solution supply loop according to the present invention, the determination of the parameters participating in the operation according to the effective conditions of the filtering constant and the response coefficient includes:

[0028] Obtain the initial value of the detection device;

[0029] Compare the initial value with the old value to obtain the deviation between the initial value and the old value; the old value is the average value after filtering in the previous 12 cycles;

[0030] Compare the deviation with the response threshold;

[0031] If the deviation is greater than the response threshold, the parameter participating in the operation is the response coefficient;

[0032] If the deviation is less than or equal to the response threshold, the parameter participating in the operation is the filtering constant.

[0033] In the method for adjusting and optimizing the reactor boric acid solution supply loop according to the present invention, the obtaining of the output value of the detection device by performing filtering based on the initial value and the values of the previous 12 cycles includes:

[0034] Remove the value of the first cycle among the values of the previous 12 cycles;

[0035] Combine the initial value with the remaining values of the previous 11 cycles to form a buffer;

[0036] Eliminate 3 maximum values and 3 minimum values in the buffer;

[0037] Take the average value of the remaining 6 cycle values in the buffer to obtain the output value of the detection device.

[0038] In the method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to the present invention, optimizing the boric acid solution supply circuit to obtain an optimized regulation logic includes:

[0039] Adding a first selection device and a second selection device to the boric acid solution supply circuit to obtain the optimized regulation logic.

[0040] In the method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to the present invention, the control end of the first selection device is connected to an automatic / manual switch, the second input end of the first selection device is connected to a manual operator of the boron and water supply system of the reactor, the third input end of the first selection device is connected to the detection device, and the output end of the first selection device is connected to the regulation module;

[0041] The control end of the second selection device is connected to the automatic / manual switch, the first input end of the second selection device receives a fixed opening degree, the second input end of the second selection device is connected to the output end of the regulation module, and the output end of the second selection device is connected to a regulating valve of the boron and water supply system of the reactor.

[0042] In the method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to the present invention, the first selection device and the second selection device are single-pole double-throw switches.

[0043] In the method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to the present invention, regulating the boric acid solution supply circuit based on the optimized regulation logic and according to the adjustment parameter and the regulation parameter includes:

[0044] In the automatic control mode, the first selection device is connected to the manual operator to receive a given value output by the manual operator;

[0045] The regulation module receives the given value transmitted through the first selection device and the measured value output by the detection device, and performs an operation based on the given value, the measured value, and the regulation parameter to obtain a regulation signal;

[0046] The second selection device is connected to the regulation module to receive the regulation signal output by the regulation module, and sends the regulation signal to the regulating valve to adjust the opening degree of the regulating valve.

[0047] In the method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to the present invention, regulating the boric acid solution supply circuit based on the optimized regulation logic and according to the adjustment parameter and the regulation parameter further includes:

[0048] In the manual control mode, the first selection device is connected to the detection device to transmit the measured value output by the detection device to the adjustment module;

[0049] The second selection device receives the fixed opening degree and transmits the fixed opening degree to the regulating valve to adjust the opening degree of the regulating valve.

[0050] In the method for optimizing the regulation of the reactor boric acid solution supply circuit according to the present invention, the regulation of the boric acid solution supply circuit based on the optimized regulation logic and according to the adjustment parameter and the regulation parameter further includes:

[0051] When the first selection device is connected to the detection device, the adjustment module performs tracking monitoring on the detection device according to the measured value transmitted by the first selection device and the measured value output by the detection device.

[0052] In the method for optimizing the regulation of the reactor boric acid solution supply circuit according to the present invention, the detection device is an electromagnetic flow transmitter;

[0053] The electromagnetic flow transmitter includes a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are respectively installed on the pipe wall where the axis of the pipe to be measured is perpendicular to the magnetic force lines of the magnetic field.

[0054] In the method for optimizing the regulation of the reactor boric acid solution supply circuit according to the present invention, the adjustment module is a PID controller.

[0055] The present invention also provides a system for optimizing the regulation of a reactor boric acid solution supply circuit, which is applied to the method for optimizing the regulation of the reactor boric acid solution supply circuit as described above, and includes: a first selection device, a second selection device, an adjustment module, a manual operator, and a detection device;

[0056] The first selection device is used to be connected to the manual operator or the detection device according to the automatic / manual switch to transmit the given value output by the manual operator or the measured value output by the detection device to the adjustment module;

[0057] The second selection device is used to be connected to the adjustment module or access a fixed opening degree according to the automatic / manual switch to transmit the fixed switch or the adjustment signal output by the adjustment module to the regulating valve to adjust the opening degree of the regulating valve;

[0058] The adjustment module is used to perform an operation based on the given value, the measured value, and the regulation parameter in the automatic control mode to obtain the adjustment signal; or, the adjustment module is used to perform tracking monitoring on the detection device in the manual control mode.

[0059] In the reactor boric acid solution supply loop regulation and optimization system of the present invention, the detection device is an electromagnetic flow transmitter;

[0060] The electromagnetic flow transmitter includes a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are respectively installed on the pipe wall where the axis of the pipe to be measured is perpendicular to the magnetic force lines of the magnetic field.

[0061] In the reactor boric acid solution supply loop regulation and optimization system of the present invention, the regulation module is a PID controller.

[0062] Implementing the reactor boric acid solution supply loop regulation and optimization method and system of the present invention has the following beneficial effects: including the following steps: adjusting the response parameters of the detection device to obtain adjustment parameters; selecting the regulation parameters of the regulation module; optimizing the boric acid solution supply loop to obtain an optimized regulation logic; and regulating the boric acid solution supply loop based on the optimized regulation logic and according to the adjustment parameters and regulation parameters. The present invention realizes that under different flow conditions, the boric acid solution supply can be normally regulated without triggering an abnormal boric acid flow alarm by adjusting and optimizing the response parameters of the detection device, the regulation parameters of the regulation module, and the boric acid solution supply loop; in addition, the present invention also solidifies the parameters during initial commissioning, eliminating the need for maintenance personnel to make real-time adjustments, thus avoiding the situation where emergency conditions cannot be adjusted in time, which affects the normal control of the boric acid solution supply to the unit. Description of the Drawings

[0063] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0064] Figure 1 is a schematic flow chart of the reactor boric acid solution supply loop regulation and optimization method provided by the present invention;

[0065] Figure 2 is a schematic diagram of the regulation logic of the reactor boric acid solution supply loop regulation and optimization system provided by the present invention;

[0066] Figure 3 is a schematic diagram of the first embodiment of the boric acid solution supply flow regulation after optimization provided by the present invention;

[0067] Figure 4 is a schematic diagram of the second embodiment of the boric acid solution supply flow regulation after optimization provided by the present invention;

[0068] Figure 5 is a schematic diagram of the third embodiment of the boric acid solution supply flow regulation after optimization provided by the present invention. Detailed Embodiments

[0069] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0070] In order to solve the problem that the boric acid solution supply can be normally adjusted under different flow conditions without triggering an abnormal boric acid flow alarm, and the frequent adjustment affects the control of the boric acid solution supply of the unit due to the need for real-time adjustment under different flow conditions, the present invention provides an optimization method for adjusting the boric acid solution supply circuit of a reactor. This adjustment optimization method analyzes and solidifies from three aspects: the detection device, the adjustment parameters of the boric acid solution supply, and the adjustment logic. By adjusting the response parameters of the detection device, optimizing the adjustment parameters, selecting appropriate adjustment parameters, and using the optimized adjustment logic for adjustment, the optimization of the boric acid solution supply adjustment circuit is finally completed, realizing that the boric acid solution supply can be normally adjusted without triggering an abnormal boric acid solution flow alarm under different flow conditions.

[0071] Specifically, refer to Figure 1 , which is a schematic flowchart of an optional embodiment of the optimization method for adjusting the boric acid solution supply circuit of the reactor provided by the present invention.

[0072] As Figure 1 shown, the optimization method for adjusting the boric acid solution supply circuit of the reactor includes the following steps:

[0073] Step S101, adjust the response parameters of the detection device 17 to obtain adjustment parameters.

[0074] In this step, adjusting the response parameters of the detection device 17 to obtain adjustment parameters includes: obtaining the damping parameter of the detection device 17; adjusting the output value of the detection device 17 based on the damping parameter, and obtaining the optimal damping parameter when the output value of the detection device 17 meets the corresponding process operating environment; the optimal damping parameter is the adjustment parameter.

[0075] Optionally, the damping parameter includes: filter constant, response coefficient, and response threshold. Among them, the specific operation of adjusting the output value of the detection device 17 based on the damping parameter is: determining the parameters participating in the operation according to the effective conditions of the filter constant and the response coefficient; the parameters participating in the operation are the filter constant or the response coefficient; calculating based on the parameters participating in the operation to obtain the initial value of the detection device 17; filtering based on the initial value and the values of the previous 12 cycles to obtain the output value of the detection device 17.

[0076] In some embodiments, according to the effective conditions of the filtering constant and the response coefficient, the parameters participating in the operation are determined as follows: obtaining the initial value of the detection device 17; comparing the initial value with the old value to obtain the deviation between the initial value and the old value; the old value is the average value after filtering in the previous 12 cycles; comparing the deviation with the response threshold; if the deviation is greater than the response threshold, the parameter participating in the operation is the response coefficient; if the deviation is less than or equal to the response threshold, the parameter participating in the operation is the filtering constant.

[0077] In some embodiments, filtering is performed based on the initial value and the values in the previous 12 cycles to obtain the output value of the detection device 17, including: removing the value of the first cycle among the values in the previous 12 cycles; combining the initial value with the remaining 11 cycle values to form a buffer; removing 3 maximum values and 3 minimum values from the buffer; taking the average value of the remaining 6 cycle values in the buffer to obtain the output value of the detection device 17.

[0078] Optionally, in the embodiments of the present invention, the detection device 17 may adopt an electromagnetic flow transmitter. The electromagnetic flow transmitter includes a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are respectively installed on the tube wall where the axis of the tube to be measured is perpendicular to the magnetic field lines of force.

[0079] Specifically, by using an electromagnetic flow transmitter to measure the replenishment flow rate of the boric acid solution, it is based on the Faraday electromagnetic induction law of the electromagnetic flow transmitter. The first detection electrode and the second detection electrode are installed on the tube wall where the axis of the tube is perpendicular to the magnetic field lines of force. When the conductive liquid moves along the axis of the measuring tube, the conductive liquid cuts the magnetic field lines of force to generate an induced electromotive force, and the induced electromotive force is proportional to the average flow velocity of the measured liquid. After being processed by the electromagnetic flow transmitter, it is output to the adjustment module 13. At the same time, the electromagnetic flow transmitter also sends the accumulated flow rate and the instantaneous flow rate obtained by the processing to the display device for display, and outputs a 4-20 mA signal to the DCS system (distributed control system) to participate in control and display.

[0080] Due to the characteristics of the electromagnetic flow transmitter itself in on-site applications, that is, there are certain damping parameters, and the oil flow responses of related parameters are also different, and the response time of the electromagnetic flow transmitter affects the adjustment process of the boric acid solution replenishment loop to a certain extent. Therefore, in the embodiments of the present invention, in the optimization of the adjustment loop, the response parameters of the electromagnetic flow transmitter in different process pipelines are first adjusted to obtain the corresponding adjustment parameters.

[0081] Among them, the output calculation formula of the electromagnetic flow transmitter is as follows:

[0082] Y(n) = 1 / N * X + (N - 1) / N * Y(n - 1) (1).

[0083] Y(n) is the output value of the instrument; N is the instrument cycle 0.4s; X is the value of 12 cycles after filtering and taking the average. N=5*2 (a 或b-1) .

[0084] Among them: the filter constant is a, and the response coefficient is b. Whether a or b takes effect is affected by the response threshold c. The specific conditions for effectiveness are: the output value of the electromagnetic flow transmitter is used as the initial value (new value) to compare with the old value, obtain the deviation between the new value and the old value, and compare the deviation with the response threshold c. If the deviation is greater than the response threshold c, the response coefficient b takes effect and is used in the calculation; if the deviation is less than or equal to the response threshold c, the filter constant a takes effect and is used in the calculation.

[0085] Furthermore, the specific algorithm of the output value of the electromagnetic flow transmitter is: use 12 cycle values as the buffer area, and continuously refresh the flow. The newly collected measurement value enters and squeezes out the oldest value (that is, the value of the first cycle). Among them, the calculation of the old value is: remove the 3 maximum values and 3 minimum values in the 12 cycle values, and average the 6 values in the middle of the buffer area to get the old value. It should be noted that the 3 maximum values and 3 minimum values that are removed are retained in the buffer area to participate in the next filtering, and are squeezed out of the buffer area in periodic order.

[0086] From formula (1) and the calculation process, it can be seen that the output value of the electromagnetic flow transmitter is composed of different weights of the past 12 cycle values, and the weight depends on the size of N. The larger the damping parameter, the larger N, the larger the proportion of old values, and the slower the response speed of the electromagnetic flow transmitter (instrument). The sensitivity and quality of the electromagnetic flow transmitter are two relative effects. Therefore, before adjusting the flow supply of boric acid solution, the site needs to find the optimal damping parameter through debugging for different process operating environments, as shown in Table 1.

[0087]

[0088] Table 1

[0089] Step S102 : selecting adjustment parameters of the adjustment module 13 .

[0090] Optionally, in an embodiment of the present invention, the regulating module 13 is a PID controller.

[0091] Specifically, the replenishment of the boric acid solution needs to meet different flow rate settings. Therefore, the initial adjustment opening of the regulating valve 15 is crucial. Adjusting to the fully open or fully closed position cannot meet the adjustment of different flow rate settings. Therefore, based on this situation, in the embodiments of the present invention, during the initial commissioning, adjustment parameters and the initial opening of the regulating valve 15 that can meet the quick response and stability of the adjustment under various flow conditions are selected. Among them, the adjustment parameters are the specific parameters in the transfer function of the PID controller, as shown below:

[0092]

[0093] As can be seen from formula (2), the specific adjustment parameters are: proportional coefficient KP, integral time TI, derivative time TD, and derivative gain KD. In formula (2), s is a variable. As can be seen from formula (2), during the initial commissioning, the proportional coefficient KP, integral time TI, derivative time TD, and derivative gain KD need to be selected. Among them, in some embodiments, during the on-site commissioning process, different initial openings of the regulating valve 15 and different adjustment parameters of the adjustment module 13 are shown in Table 2 below.

[0094]

[0095] Table 2

[0096] Step S103: Optimize the boric acid solution replenishment loop to obtain an optimized adjustment logic.

[0097] In this step, an optimized adjustment logic is obtained by adding a first selection device 12 and a second selection device 14 to the boric acid solution replenishment loop. Among them, the control end of the first selection device 12 is connected to the automatic / manual switch 11, the second input end of the first selection device 12 is connected to the manual operator 16 of the reactor boron and water replenishment system, the third input end of the first selection device 12 is connected to the detection device 17, and the output end of the first selection device 12 is connected to the adjustment module 13; the control end of the second selection device 14 is connected to the automatic / manual switch 11, the first input end of the second selection device 14 receives a fixed opening, the second input end of the second selection device 14 is connected to the output end of the adjustment module 13, and the output end of the second selection device 14 is connected to the regulating valve 15 of the reactor boron and water replenishment system. Optionally, in the embodiments of the present invention, the first selection device 12 and the second selection device 14 are single-pole double-throw switches.

[0098] By optimizing the boric acid solution replenishment loop to obtain this optimized adjustment logic, normal adjustment can be achieved during the boric acid solution replenishment process, and abnormal boron flow alarms can be avoided.

[0099] Step S104: Based on the optimized adjustment logic, adjust the boric acid solution replenishment loop according to the adjustment parameters and the adjustment parameters.

[0100] In this step, adjusting the boric acid solution supply loop based on the optimized adjustment logic and according to the adjustment parameters and regulation parameters includes: in the automatic control mode, the first selection device 12 is connected to the hand controller 16 to receive the set value output by the hand controller 16; the adjustment module 13 receives the set value transmitted through the first selection device 12 and the measured value output by the detection device 17, and performs operations based on the set value, the measured value, and the regulation parameters to obtain an adjustment signal; the second selection device 14 is connected to the adjustment module 13 to receive the adjustment signal output by the adjustment module 13, and sends the adjustment signal to the regulating valve 15 to adjust the opening degree of the regulating valve 15.

[0101] Furthermore, adjusting the boric acid solution supply loop based on the optimized adjustment logic and according to the adjustment parameters and regulation parameters further includes: in the manual control mode, the first selection device 12 is connected to the detection device 17 to transmit the measured value output by the detection device 17 to the adjustment module 13; the second selection device 14 receives a fixed opening degree and transmits the fixed opening degree to the regulating valve 15 to adjust the opening degree of the regulating valve 15. At the same time, in the manual control mode, when the first selection device 12 is connected to the detection device 17, the adjustment module 13 performs tracking monitoring on the detection device 17 according to the measured value transmitted by the first selection device 12 and the measured value output by the detection device 17.

[0102] Specifically, as Figure 2 shown, when the user selects automatic control through the automatic / manual switch 11, the optimized adjustment logic enters the automatic control mode. In the automatic control mode, at this time, the first selection device 12 is connected to the hand controller 16, and the second selection device 14 is connected to the adjustment module 13. At this time, the set value output by the hand controller 16 is sent to the adjustment module 13 through the first selection device 12. At the same time, the measured value output by the electromagnetic flow transmitter is also sent to the adjustment module 13. The adjustment module 13 performs deviation calculation based on the set value and the measured value to obtain a corresponding adjustment signal. This adjustment signal is sent to the second selection device 14, and is transmitted by the second selection device 14 to the regulating valve 15 to adjust the opening degree of the regulating valve 15, so as to avoid triggering a flow anomaly alarm when the measured value of the electromagnetic flow transmitter is greater than the threshold and lasts for 30 seconds.

[0103] When the user selects manual control through the automatic / manual switch 11, the optimization adjustment logic enters the manual control mode. In the manual control mode, the first selection device 12 is connected to the electromagnetic flow transmitter, and the second selection device 14 accesses a fixed opening. At this time, the adjustment module 13 does not perform calculations. It only compares the measured value transmitted by the first selection device 12 with the measured value output by the electromagnetic flow transmitter to achieve the tracking and monitoring of the electromagnetic flow transmitter. At the same time, the second selection device 14 transmits the fixed opening to the control valve 15 to control the control valve 15 to be at the fixed opening, so as to avoid triggering a flow anomaly alarm when the measured value of the electromagnetic flow transmitter is greater than the threshold and lasts for 30 seconds.

[0104] By adopting the optimization adjustment logic of the present invention for adjustment, it is possible to avoid boron flow anomaly alarms to ensure the normal adjustment of boric acid solution replenishment. In some specific embodiments, as Figures 3 to 5 shown, after a certain nuclear power unit is adjusted based on the optimization logic of the present invention, the boric acid replenishment adjustment system responds quickly. Within 30 seconds, the deviation between the actual boric acid flow and the set flow is less than 300 liters per hour, but the flow adjustment process still proceeds normally.

[0105] Refer to Figure 2 , for the reactor boric acid solution replenishment loop adjustment optimization system provided by the present invention, which can be applied to the reactor boric acid solution replenishment loop adjustment optimization method disclosed in the present invention.

[0106] Specifically, as Figure 2 shown, the reactor boric acid solution replenishment loop adjustment optimization system includes: a first selection device 12, a second selection device 14, an adjustment module 13, a hand controller 16, and a detection device 17. Among them, Figure 2 the XU1 comparator and the XU2 comparator in

[0107] are conventional components in the boric acid solution replenishment loop. Their working principles and functions are the conventional logics of the boric acid solution replenishment loop. Therefore, the present invention will not elaborate on them in detail. The first selection device 12 is used to connect to the hand controller 16 or the detection device 17 according to the automatic / manual switch 11, so as to transmit the given value output by the hand controller 16 or the measured value output by the detection device 17 to the adjustment module 13.

[0108] The second selection device 14 is used to connect to the adjustment module 13 or access a fixed opening according to the automatic / manual switch 11, so as to transmit the fixed switch or the adjustment signal output by the adjustment module 13 to the control valve 15 to adjust the opening of the control valve 15.

[0109] The adjustment module 13 is used to perform calculations based on the given value, the measured value, and the adjustment parameters in the automatic control mode to obtain an adjustment signal; or, the adjustment module 13 is used to perform tracking and monitoring on the detection device 17 in the manual control mode.

[0110] Optionally, in the embodiments of the present invention, the detection device 17 is an electromagnetic flow transmitter; the electromagnetic flow transmitter includes a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are respectively installed on the pipe wall where the axis of the pipe to be measured is perpendicular to the magnetic force lines of the magnetic field.

[0111] Optionally, in the embodiments of the present invention, the adjustment module 13 is a PID controller.

[0112] Furthermore, as Figure 2 shown, the reactor boric acid solution replenishment loop adjustment and optimization system further includes: an automatic / manual switch 11. The automatic / manual switch 11 can be used to realize the switching between the automatic control mode and the manual control mode. The specific adjustment process is as described above.

[0113] The present invention adjusts the response of the electromagnetic flow meter, solidifies the initial state of the regulating valve 15 of the boric acid solution replenishment regulating loop, selects appropriate parameters of the adjustment module 13, and finally realizes the replenishment of boric acid solution under different flow conditions, while avoiding abnormal boron flow alarms; in addition, after the solidification parameters are debugged for the first time, there is no need for maintenance personnel to make real-time adjustments, avoiding the situation that the emergency conditions cannot be adjusted in time, thereby affecting the normal control of the boric acid solution replenishment of the unit.

[0114] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0115] Those skilled in the art can further realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of the examples have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0116] The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented directly in hardware, in software modules executed by a processor, or in a combination thereof. The software modules may be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well known in the art.

[0117] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A method for regulating and optimizing a boric acid solution supply circuit of a reactor, characterized in that It includes the following steps: Adjust the response parameters of the detection device to obtain adjustment parameters; The adjusting the response parameters of the detection device to obtain adjustment parameters includes: obtaining the damping parameters of the detection device; adjusting the output value of the detection device based on the damping parameters, and obtaining the optimal damping parameter when the output value of the detection device meets the corresponding process operation environment; the optimal damping parameter is the adjustment parameter; the damping parameters include: filtering constant, response coefficient and response threshold; the adjusting the output value of the detection device based on the damping parameters includes: determining the parameters participating in the operation according to the effective conditions of the filtering constant and the response coefficient; the parameters participating in the operation are the filtering constant or the response coefficient; calculating based on the parameters participating in the operation to obtain the initial value of the detection device; filtering based on the initial value and the values of the previous 12 cycles to obtain the output value of the detection device; The determining the parameters participating in the operation according to the effective conditions of the filtering constant and the response coefficient includes: obtaining the initial value of the detection device; comparing the initial value with the old value to obtain the deviation between the initial value and the old value; the old value is the average value after filtering in the previous 12 cycles; comparing the deviation with the response threshold; if the deviation is greater than the response threshold, the parameter participating in the operation is the response coefficient; if the deviation is less than or equal to the response threshold, the parameter participating in the operation is the filtering constant; Select the adjustment parameters of the adjustment module; Optimize the boric acid solution supply circuit to obtain an optimized adjustment logic; the optimizing the boric acid solution supply circuit to obtain an optimized adjustment logic includes: adding a first selection device and a second selection device to the boric acid solution supply circuit to obtain the optimized adjustment logic; the control end of the first selection device is connected to the automatic / manual switch, the second input end of the first selection device is connected to the manual operator of the reactor boron and water supply system, the third input end of the first selection device is connected to the detection device, and the output end of the first selection device is connected to the adjustment module; the control end of the second selection device is connected to the automatic / manual switch, the first input end of the second selection device receives a fixed opening, the second input end of the second selection device is connected to the output end of the adjustment module, and the output end of the second selection device is connected to the regulating valve of the reactor boron and water supply system; Based on the optimized adjustment logic, adjust the boric acid solution supply circuit according to the adjustment parameters and the adjustment parameters.

2. The optimization method for regulating the boric acid solution supply loop of the reactor according to claim 1, characterized in that The filtering based on the initial value and the values of the previous 12 cycles to obtain the output value of the detection device includes: Remove the value of the first cycle among the values of the previous 12 cycles; Combine the initial value with the remaining values of the previous 11 cycles to form a buffer; Eliminate 3 maximum values and 3 minimum values in the buffer; Take the average value of the remaining 6 cycle values in the buffer to obtain the output value of the detection device.

3. The method for regulating and optimizing the reactor boric acid solution supply loop according to claim 1, characterized in that, The first selection device and the second selection device are single-pole double-throw switches.

4. The method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to claim 1, characterized in that, Adjusting the boric acid solution supply circuit based on the optimized adjustment logic and according to the adjustment parameter and the regulation parameter includes: In the automatic control mode, the first selection device is connected to the manual controller to receive the given value output by the manual controller; The adjustment module receives the given value transmitted through the first selection device and the measured value output by the detection device, and performs operations based on the given value, the measured value, and the regulation parameter to obtain an adjustment signal; The second selection device is connected to the adjustment module to receive the adjustment signal output by the adjustment module, and sends the adjustment signal to the regulating valve to adjust the opening degree of the regulating valve.

5. The method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to claim 1, characterized in that, Adjusting the boric acid solution supply circuit based on the optimized adjustment logic and according to the adjustment parameter and the regulation parameter further includes: In the manual control mode, the first selection device is connected to the detection device to transmit the measured value output by the detection device to the adjustment module; The second selection device receives the fixed opening degree and transmits the fixed opening degree to the regulating valve to adjust the opening degree of the regulating valve.

6. The optimization method for regulating the boric acid solution supply loop of the reactor according to claim 5, wherein Adjusting the boric acid solution supply circuit based on the optimized adjustment logic and according to the adjustment parameter and the regulation parameter further includes: When the first selection device is connected to the detection device, the adjustment module performs tracking monitoring on the detection device according to the measured value transmitted by the first selection device and the measured value output by the detection device.

7. The method for optimizing the regulation of the boric acid solution supply circuit of the reactor according to any one of claims 1-6, characterized in that The detection device is an electromagnetic flow transmitter; The electromagnetic flow transmitter includes a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are respectively installed on the tube wall where the axis of the tube to be measured is perpendicular to the magnetic field lines of force.

8. The optimization method for regulating the boric acid solution supply loop of the reactor according to claim 7, characterized in that, The adjustment module is a PID controller.

9. A regulating and optimizing system for a reactor boric acid solution supply circuit, which is used to implement the regulating and optimizing method for the reactor boric acid solution supply circuit according to any one of claims 1-8, and is characterized in that, Including: A first selection device, a second selection device, an adjustment module, a manual controller, and a detection device; The first selection device is used to be connected to the manual controller or the detection device according to the automatic / manual switch to transmit the given value output by the manual controller or the measured value output by the detection device to the adjustment module; The second selection device is used to be connected to the adjustment module or access the fixed opening degree according to the automatic / manual switch to transmit the fixed opening degree or the adjustment signal output by the adjustment module to the regulating valve to adjust the opening degree of the regulating valve; The adjustment module is used to perform operations based on the given value, the measured value, and the regulation parameter in the automatic control mode to obtain the adjustment signal; or, the adjustment module is used to perform tracking monitoring on the detection device in the manual control mode.

10. The reactor boric acid solution supply loop regulation and optimization system according to claim 9, characterized in that, The detection device is an electromagnetic flow transmitter; The electromagnetic flow transmitter includes a first detection electrode and a second detection electrode, and the first detection electrode and the second detection electrode are respectively installed on the tube wall where the axis of the tube to be measured is perpendicular to the magnetic field lines of force.

11. The reactor boric acid solution makeup loop regulation and optimization system according to claim 9, characterized in that, The adjustment module is a PID controller.

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