A method for intelligently adjusting drum net operation parameters of a nuclear power plant and a platform thereof

Abstract

The present application relates to a kind of nuclear power plant drum net operation parameter intelligent adjustment method and its platform, by collecting and storing real-time monitoring data;According to the real-time monitoring data collected, the preset adjustment algorithm stored is used to intelligently adjust and early warning drum net operation parameter, and real-time display drum net operation parameter.It can be based on the concentration and kind of clogging, expected to reach drum net time, real-time monitoring parameter such as drum net submergence area, intelligently optimize and adjust drum net operation parameter in grade, under the premise of efficient adjustment drum net operation parameter, save energy, can maximize guarantee power generation income.Adopt the nuclear power plant drum net operation parameter intelligent adjustment method and its platform disclosed in the present application, can protect nuclear power plant drum net with the best drum net speed and circulating water flow, reduce the economic loss of power plant due to the arrival of clogging due to shutdown, while improving the nuclear power generation efficiency, reduce drum net clogging adjustment cost.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power control, specifically relating to an intelligent adjustment method and platform for the operating parameters of a nuclear power plant's grid. Background Technology

[0002] In recent years, with changes in the marine ecological environment and the increase in the types and quantities of marine debris, nuclear power plants at home and abroad have experienced multiple incidents of blockage in the cooling source system caused by the large-scale intrusion of marine organisms and marine debris. When there are a lot of marine organisms and marine debris in the seawater, they can block the pump room's duct mesh, which can lead to reduced power operation or even shutdown of the nuclear power unit, threatening the safe operation of the unit and causing serious economic losses and a series of adverse social impacts.

[0003] In the past, the method for dealing with blockages in the pump room was to adjust the pump speed to medium or high speed when the pressure difference between the drum and the screen reached a certain value. If the speed continued to be high, the circulating pump would be stopped when the pressure difference reached a certain level. The backwash flow rate and velocity remained unchanged throughout the process. These measures to ensure system safety were based on empirical data and did not involve intelligent adjustment based on real-time monitoring data. Furthermore, the pump shutdown method was relatively conservative, and adopting this measure meant sacrificing significant economic efficiency.

[0004] In the past, the operation and flow regulation of the backwashing system in nuclear power plants were based on experience. The backwashing speed was adjusted to correspond to the pressure difference of the backwashing system and the pressure difference of the circulating pump was stopped. When the pressure difference of the backwashing system reached 0.1m, the speed was adjusted to medium speed; when the difference reached 0.2m, the speed was adjusted to high speed; and when the difference reached 0.8m, the circulating pump was stopped. The backwashing flow rate and velocity remained unchanged throughout the process. This regulation method cannot be intelligently adjusted according to real-time monitoring data, cannot maximize the power plant's maximum power generation efficiency, and reduces the economics of nuclear power generation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method and platform for intelligent adjustment of the operating parameters of the nuclear power plant's grid. This method can intelligently optimize and adjust the operating parameters of the grid in a targeted and tiered manner based on real-time monitoring parameters such as the concentration and type of blockages, the estimated arrival time of the grid, and the flooded area of ​​the grid. While efficiently adjusting the operating parameters of the grid, this method saves energy and maximizes the power generation revenue.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a method for intelligent adjustment of operating parameters of a nuclear power plant's grid connection is provided, the method comprising the following steps:

[0008] S1. Collect and store real-time monitoring data;

[0009] S2. Based on the collected real-time monitoring data, the drum mesh operating parameters are intelligently adjusted and early warning is given using the stored preset adjustment algorithm, and the drum mesh operating parameters are displayed in real time.

[0010] Furthermore, the real-time monitoring data in step S1 includes real-time monitoring data of blockages in the open sea and real-time monitoring data of the operating parameters of the pump house's blower network.

[0011] Furthermore, the real-time monitoring data of offshore blockages includes the types of blockages, the concentration of blockages, and the estimated time of arrival at the grate within a preset range.

[0012] Furthermore, the real-time monitoring data of the pump station's drum screen operating parameters includes the real-time differential pressure of the drum screen, the real-time rotational speed of the drum screen, the real-time submerged area of ​​the drum screen, the flow rate of the circulating water pump, and the real-time flow rate and differential pressure of the backwash.

[0013] Furthermore, the preset adjustment algorithm in step S2 is to intelligently adjust the drum mesh operating parameters according to the level of blockage risk of the blockage.

[0014] Furthermore, firstly, determine the type of blockage. After the measured submerged area of ​​the drum screen is greater than the set submerged area, for the same type of blockage, when the blockage concentration k≤k0 and the expected arrival time of the drum screen t<t0, set the drum screen rotation speed v0, the backwash flow rate f0, and the backwash pressure F0.

[0015] When the blockage concentration k0 < k ≤ k1 and the estimated arrival time at the drum screen t0 < t < t1, further determine the drum screen pressure difference. When the drum screen pressure difference ΔF > ΔF1, set the drum screen rotation speed to v1, the backwash flow rate to f1, and the backwash pressure to F1.

[0016] When the blockage concentration k1 < k ≤ k2, the estimated arrival time at the drum screen t1 < t < t2, and the drum screen pressure difference ΔF > ΔF2, set the drum screen rotation speed to v2, the backwash flow rate to f2, and the backwash pressure to F2.

[0017] Where △F2>△F1, v0<v1<v2, f0<f1<f2, F0<F1<F2.

[0018] Furthermore, when the blockage concentration k≤k0 and the expected arrival time at the drum screen t<t0, the circulating water flow rate is set to 100%;

[0019] When the blockage concentration k0 < k ≤ k1, the estimated time to reach the drum screen t0 < t < t1, and the drum screen pressure difference ΔF > ΔF1, the circulating water flow rate is set to m1%.

[0020] When the blockage concentration k1 < k ≤ k2, the expected arrival time at the drum screen t1 < t < t2, and the drum screen pressure difference ΔF > ΔF2, the circulating water flow rate is set to m2% and m1 > m2.

[0021] Furthermore, based on the level of blockage risk, different colored indicator lights are used to indicate the level of blockage risk, and a warning signal is issued when a blockage is identified as having a high risk of blockage.

[0022] In a second aspect, a nuclear power plant blast grid operation parameter intelligent adjustment platform is provided. The platform is used to implement the nuclear power plant blast grid operation parameter intelligent adjustment method described in the first aspect of the present invention and any optional embodiment thereof. The platform includes a real-time parameter acquisition and storage module, a blast grid operation parameter adjustment module, and a blast grid operation parameter display module.

[0023] The real-time parameter acquisition and storage module is used to acquire and store real-time monitoring data;

[0024] The real-time parameter acquisition and storage module is used to intelligently adjust and provide early warnings for the drum mesh operating parameters based on the acquired real-time monitoring data and the stored preset adjustment algorithm.

[0025] The drum mesh operation parameter display module is used to display the drum mesh operation parameters in real time.

[0026] Furthermore, the drum mesh operation parameter display module is also used to display the drum mesh design parameters and early warning information.

[0027] The advantages of this invention are as follows: Using the intelligent adjustment method and platform for the operating parameters of a nuclear power plant's grid, as disclosed in this invention, maintenance personnel can clearly see real-time monitoring data and early warning information related to grid operation and flow regulation on the human-machine interface. The platform has a built-in preset adjustment algorithm. When the relevant real-time monitoring data reaches the corresponding values, the grid operation parameters such as grid rotation speed and circulating water flow are optimized according to the preset adjustment algorithm. This protects the nuclear power plant's grid with optimal grid rotation speed and circulating water flow, reducing economic losses caused by shutdowns due to blockages. Simultaneously, it improves nuclear power generation efficiency and reduces grid blockage regulation costs, demonstrating promising application prospects. Attached Figure Description

[0028] Figure 1 This is a flowchart of an intelligent adjustment method for the operating parameters of a nuclear power plant according to an embodiment of the present invention;

[0029] Figure 2 This is a diagram of the interface of the drum grid operation parameter display module in an intelligent adjustment platform for drum grid operation parameters of a nuclear power plant, as described in an embodiment of the present invention. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figure 1 As shown in the figure, this embodiment provides an intelligent adjustment platform for the operating parameters of the power plant's grid system. The operating platform mainly includes three modules: a real-time parameter acquisition and storage module, a grid system operating parameter adjustment module, and a grid system operating parameter display module.

[0033] 321 Real-time Parameter Acquisition and Storage Module

[0034] The real-time parameter acquisition and storage module is used to acquire and store real-time monitoring data. Real-time monitoring data includes two types:

[0035] 1) Real-time monitoring data of blockages in offshore waters: type of blockage, concentration, and estimated time of arrival at the grate;

[0036] 2) Real-time monitoring data of pump station drum screen operating parameters: real-time differential pressure of drum screen, real-time rotation speed of drum screen, real-time submerged area of ​​drum screen, flow rate of circulating water pump, real-time flow rate and differential pressure of backwash;

[0037] 322 Drum Mesh Operating Parameter Adjustment Module

[0038] Based on the real-time monitoring data collected by the real-time parameter acquisition and storage module, the drum mesh operating parameters are intelligently adjusted and warned in stages using the stored preset adjustment algorithm. The drum mesh operating parameters are intelligently adjusted in stages according to the level of blockage risk of the blockage.

[0039] The preset adjustment algorithm is illustrated with an example in this implementation as follows:

[0040] 1) The measured blockage type, the measured blockage concentration is less than or equal to the 0th level concentration, the estimated arrival time at the drum screen is less than the 0th level time, the measured submerged area of ​​the drum screen, the drum screen is running at low speed, and the backwash is at low flow and low pressure; at this time, the warning display is normal operation, and the display icon is green.

[0041] 2) If the measured blockage type, the measured blockage concentration is less than or equal to the first-level concentration, the expected arrival time at the drum screen is less than the first-level time, and the measured submerged area of ​​the drum screen is greater than the set submerged area, then when the drum screen reaches the first-level pressure difference, the drum screen speed is adjusted from low speed to medium speed, and the backwash is adjusted from low flow rate and low pressure to medium flow rate and medium pressure; at this time, the warning display is the first-level warning, and the display icon is light yellow.

[0042] 3) If the measured blockage type and concentration are less than or equal to the second-level concentration, the estimated arrival time at the drum screen is less than the second-level time, and the measured submerged area of ​​the drum screen is greater than the set submerged area, then when the drum screen pressure difference reaches the second-level pressure difference, the drum screen speed is adjusted from medium speed to high speed, and the backwashing is adjusted from medium flow rate and medium pressure to high flow rate and high pressure; at this time, the warning display shows the second-level warning, and the display icon is orange.

[0043] 4) If the measured blockage type and concentration are greater than or equal to the third-level concentration and the expected arrival time at the drum screen is less than the third-level time, then when the drum screen pressure difference reaches the third-level pressure difference, the drum screen speed will be kept at high speed, the backwash will be kept at high flow and high pressure, and the circulating water flow will be reduced by 10%; at this time, the warning display will be red and an alarm sound will be emitted.

[0044] 5) If the measured blockage type and concentration are greater than or equal to the fourth level concentration and the expected arrival time at the drum screen is less than the fourth level time, then when the drum screen pressure difference reaches the third level, the drum screen speed will remain high, the backwash will maintain high flow and high pressure, and the circulating water flow will be reduced by 20%; at this time, the warning display will be red and an alarm sound will be emitted.

[0045] 6) If the measured blockage type and concentration are greater than or equal to the fifth level concentration and the expected arrival time at the drum screen is less than the fifth level time, then when the drum screen pressure difference reaches the third level, the drum screen speed will remain high, the backwash will maintain high flow and high pressure, and the circulating water flow will be reduced by 30%; at this time, the warning display will be red and an alarm sound will be emitted.

[0046] 7) If the measured blockage type and concentration are greater than or equal to the sixth-level concentration, and the estimated arrival time at the drum screen is less than the sixth-level time, then when the drum screen pressure difference reaches the third-level pressure difference, the drum screen speed will remain at high speed, the backwash will maintain high flow and high pressure, and the circulating water flow will be reduced by 40%. At this time, the warning display will show an alarm, the display icon will be red, and an alarm sound will be emitted.

[0047] 8) If the measured blockage type and concentration are greater than or equal to the seventh-level concentration, and the estimated arrival time at the drum screen is less than the seventh-level time, then when the drum screen pressure difference reaches the third-level pressure difference, the drum screen speed will remain at high speed, the backwash will maintain high flow and high pressure, and the circulating water flow will be reduced by 50%. At this time, the warning display will show an alarm, the display icon will be red, and an alarm sound will be emitted.

[0048] 9) If the measured blockage type and concentration are greater than or equal to the eighth-level concentration, and the estimated arrival time at the drum screen is less than the eighth-level time, then when the drum screen pressure difference reaches the third-level pressure difference, the drum screen speed will remain high, the backwash will maintain high flow and high pressure, and the circulating water flow will be reduced by 60%. At this time, the warning display will show an alarm, the display icon will be red, and an alarm sound will be emitted.

[0049] 10) If the measured blockage type and concentration are greater than or equal to the ninth-level concentration, and the estimated arrival time at the drum screen is less than the ninth-level time, then when the drum screen pressure difference reaches the third-level pressure difference, the drum screen speed will remain at high speed, the backwash will maintain high flow and high pressure, and the circulating water flow will drop to 0. At this time, the warning display will show an alarm, the display icon will be red, and an alarm sound will be emitted.

[0050] 11) After the circulating water flow rate decreases, if the measured blockage type and concentration are less than or equal to the first-level concentration, and the estimated arrival time at the drum screen is less than the first-level time, then when the drum screen pressure difference drops back to the second-level pressure difference, the drum screen speed is adjusted from medium speed to low speed, the backwash is adjusted from medium flow rate and medium pressure to low flow rate and low pressure, and the circulating water flow rate is restored to 100%. At this time, the warning display shows normal operation, and the display icon is green.

[0051] 323 Drum Mesh Operating Parameter Display Module

[0052] The drum and wire mesh operation parameter display module is the human-machine interface. For example... Figure 2 As shown, the human-computer interaction interface displays three sections:

[0053] 1) Design data shows: design mesh size of the drum screen, design flow rate and head of the circulating water pump, and design flow rate and head of the important plant water pump.

[0054] 2) Real-time data display: real-time blockage type, real-time concentration, real-time estimated arrival time of the drum screen, real-time pressure difference of the drum screen, real-time rotation speed of the drum screen, real-time submerged area of ​​the drum screen, circulating water flow rate, real-time backwash flow rate and pressure difference. The data trend curves of each of the above real-time data can be viewed in real time.

[0055] 3) Alarm display: The operation and control data in the drum and mesh operating parameter adjustment module are displayed in corresponding colors according to the alarm level, and the alarm level and operation prompts are displayed. At the same time, the drum and mesh motor, circulating water pump and backwash pump are linked to perform corresponding adjustment and control.

[0056] The following is an example illustrating the working process of an intelligent adjustment method for the operating parameters of a nuclear power plant's drum screen, as disclosed in an embodiment of the present invention. The intelligent adjustment method for the operating parameters of a nuclear power plant's drum screen is applied to an intelligent adjustment platform for the operating parameters of a nuclear power plant's drum screen. This platform is installed in a coastal nuclear power plant and receives and stores real-time monitoring data in real time, including: type and concentration of blockages, estimated time of arrival at the drum screen, drum screen pressure difference, drum screen rotation speed, drum screen flooded area, drum screen blockage rate, circulating water pump flow rate, and real-time backwash flow rate and pressure difference.

[0057] At a certain moment, the detected blockage type was laver, the measured laver concentration c1 was less than or equal to the second-level concentration, the estimated arrival time at the drum screen t1 was less than the second-level time, the measured submerged area A1 of the drum screen was greater than the set submerged area A', and the measured drum screen pressure difference ΔH2 reached the second-level pressure difference. The above monitoring data was transmitted to the drum screen operating parameter adjustment module, which adjusted the drum screen operating parameters according to a preset algorithm: the drum screen rotation speed was adjusted from medium speed v1 to high speed v2, and the backwashing flow rate Q1 and medium pressure P1 were adjusted to high flow rate Q2 and high pressure P2. At this time, the second-level warning was displayed, and the display icon was orange.

[0058] As the amount of laver increases, the measured laver concentration c8 is greater than or equal to the eighth-level concentration, the expected arrival time at the drum screen t8 is less than the eighth-level time, and the drum screen pressure difference reaches the third-level pressure difference ΔH3. At this time, the drum screen rotation speed remains at high speed v2, the backwash maintains high flow rate Q2 and high pressure P2, and the circulating water flow rate is reduced by 60%. At this time, the warning display alarm is activated, the display icon turns red, and an alarm sound is emitted.

[0059] After a period of time, the amount of laver gradually decreases. The measured laver concentration c0 is less than or equal to the first-level concentration, the estimated time to reach the drum screen t0 is less than the first-level time, and the drum screen pressure difference drops back to the second-level pressure difference ΔH2. At this time, the drum screen rotation speed is adjusted from medium speed v1 to low speed v0, and the backwash is adjusted from medium flow rate Q1 and medium pressure P1 to low flow rate Q0 and low pressure P0. The circulating water flow rate is restored to 100%. At this time, the warning display shows normal operation, and the display icon is green.

[0060] As can be seen from the above embodiments, the intelligent adjustment method and platform for nuclear power plant grid operation parameters disclosed in this invention collects and stores real-time monitoring data; based on the collected real-time monitoring data, it uses a stored preset adjustment algorithm to intelligently adjust and warn of grid operation parameters, and displays the grid operation parameters in real time. It can intelligently optimize and adjust grid operation parameters in a targeted manner at different levels based on real-time monitoring parameters such as blockage concentration and type, expected arrival time of the blockage, and grid flooding area. While efficiently adjusting grid blockage, it saves energy and maximizes power generation revenue. Using the intelligent adjustment method and platform for nuclear power plant grid operation parameters disclosed in this invention, the grid can be protected at the optimal grid rotation speed and circulating water flow rate, reducing economic losses to the power plant due to shutdowns caused by blockages, while improving grid blockage adjustment efficiency and reducing grid blockage adjustment costs.

[0061] The methods and platforms described in this invention are not limited to the embodiments described in the specific implementation. Other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of technical innovation of this invention.

Claims

1. A method for intelligent adjustment of operating parameters of a nuclear power plant's grid, the method comprising the following steps: S1. Collect and store real-time monitoring data, including real-time monitoring data of offshore blockages and real-time monitoring data of pump room drum screen operation parameters. The real-time monitoring data of offshore blockages includes the types of blockages, the concentration of blockages, and the estimated time of arrival at the drum screen within a preset range. S2. Based on the collected real-time monitoring data, the stored preset adjustment algorithm is used to intelligently adjust and warn the drum grid operating parameters, and the drum grid operating parameters are displayed in real time. The preset adjustment algorithm is to intelligently adjust the drum grid operating parameters according to the level of blockage risk of the blockage, so as to reduce the economic losses of the power plant caused by the shutdown due to the arrival of blockage, while improving the nuclear power generation efficiency and reducing the cost of drum grid blockage adjustment. The preset adjustment algorithm intelligently adjusts the drum screen operating parameters, including drum screen rotation speed setting v2, backwash flow rate f2, backwash pressure F2, and circulating water flow rate; The preset adjustment algorithm first determines the type of blockage. After the measured submerged area of ​​the drum screen is greater than the set submerged area, for the same type of blockage, when the blockage concentration k≤k0 and the estimated time to reach the drum screen t<t0, the drum screen rotation speed is set to v0, the backwash flow rate is f0, the backwash pressure is F0, and the circulating water flow rate is set to 100%. When the blockage concentration k0 < k ≤ k1 and the estimated arrival time at the drum screen t0 < t < t1, further determine the drum screen pressure difference. When the drum screen pressure difference ΔF > ΔF1, set the drum screen rotation speed to v1, the backwash flow rate to f1, the backwash pressure to F1, and the circulating water flow rate to m1%. When the blockage concentration k1 < k ≤ k2, the estimated arrival time at the drum screen t1 < t < t2, and the drum screen pressure difference ΔF > ΔF2, set the drum screen rotation speed to v2, the backwash flow rate to f2, the backwash pressure to F2, and the circulating water flow rate to m2%. Where △F2>△F1, v0<v1<v2, f0<f1<f2, F0<F1<F2, m1> m2.

2. The intelligent adjustment method for the operating parameters of a nuclear power plant's grid as described in claim 1, characterized in that: The real-time monitoring data of the pump station's drum screen operating parameters include the real-time differential pressure of the drum screen, the real-time rotational speed of the drum screen, the real-time submerged area of ​​the drum screen, the flow rate of the circulating water pump, and the real-time flow rate and differential pressure of the backwash.

3. The intelligent adjustment method for the operating parameters of a nuclear power plant's grid as described in claim 1, characterized in that: Different colored indicator lights are used to indicate the level of blockage risk based on the level of blockage risk, and a warning signal is issued when a blockage is identified as having a high risk of blockage.

4. A smart adjustment platform for nuclear power plant grid operation parameters, the platform being used to implement the smart adjustment method for nuclear power plant grid operation parameters as described in any one of claims 1-3, characterized in that: The platform includes a real-time parameter acquisition and storage module, a drum and wire mesh operation parameter adjustment module, and a drum and wire mesh operation parameter display module. The real-time parameter acquisition and storage module is used to acquire and store real-time monitoring data; The real-time parameter acquisition and storage module is used to intelligently adjust and provide early warnings for the drum mesh operating parameters based on the acquired real-time monitoring data and the stored preset adjustment algorithm. The drum mesh operation parameter display module is used to display the drum mesh operation parameters in real time.

5. The intelligent adjustment platform for nuclear power plant grid operation parameters as described in claim 4, characterized in that: The drum mesh operation parameter display module is also used to display the drum mesh design parameters and early warning information.

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