First circulating pump starting sequence control optimization method

Abstract

The invention provides a first circulating pump starting sequence control optimization method, and relates to the technical field of circulating pump control, and the method comprises the steps: monitoring the working state of a first circulating pump in real time, obtaining a preset first circulating pump sequence control strategy, adding a butterfly valve opening degree control process at the initial starting stage of the first circulating pump, and starting the first circulating pump; establishing a starting data-butterfly valve opening control data mapping relation, determining butterfly valve opening control data at the initial starting stage of the first circulating pump by combining the outlet pressure data of the first circulating pump, and performing application control; when it is monitored that the water level signal of the condenser water chamber corresponding to the first circulating pump is a normal water level signal, it is judged that water injection of the circulating water pipeline is completed, and the butterfly valve opening degree of the first circulating pump is controlled secondarily; automation of starting of the circulating pump is effectively achieved, and safety of starting of the circulating pump is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of circulating pump control, and in particular to a method for optimizing the sequential control of starting a first circulating pump. Background Art

[0002] During the operation of the power plant, in order to make full use of the power plant resources, the first circulating pump will be started and stopped with an empty pipe according to the production plan; when a circulating pump is started, the circulating pump outlet butterfly valve will automatically open fully, which will cause water hammer and impact the pipeline equipment; in order to reduce water hammer, personnel will be assigned to control the opening of the butterfly valve when the circulating pump outlet butterfly valve opens; however, the quality of personnel cooperation is poor and there is a lag in information transmission, which leads to delayed control of the outlet butterfly valve opening and low regulation accuracy.

[0003] Therefore, the present invention provides a method for optimizing the sequential control of starting a first circulating pump. Summary of the invention

[0004] The present invention provides a method for optimizing the sequential control of starting a first circulating pump, which is used for real-time monitoring of the working status of the first circulating pump, obtaining a preset sequential control strategy for the first circulating pump and adding a butterfly valve opening control process for the initial start-up of the first circulating pump, so as to start the first circulating pump; establishing a mapping relationship between startup data and butterfly valve opening control data, and determining the butterfly valve opening control data for the initial start-up of the first circulating pump in combination with the outlet pressure data of the first circulating pump and performing application control; when it is monitored that the water level signal of the condenser water chamber corresponding to the first circulating pump is a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time; the automation of the startup of the circulating pump is effectively realized, and the safety of the startup of the circulating pump is ensured.

[0005] The present invention provides a method for optimizing the sequential control of starting a first circulating pump, comprising:

[0006] Step 1: Monitor the working status of the first circulating pump in real time, obtain the preset sequential control strategy of the first circulating pump, add the butterfly valve opening control process at the initial start-up of the first circulating pump, and start the first circulating pump according to the added sequential control strategy of the first circulating pump;

[0007] Step 2: Obtain the historical startup data of the first circulating pump, establish the startup data-dish valve opening control data mapping relationship, and determine the butterfly valve opening control data at the initial startup of the first circulating pump in combination with the outlet pressure data of the first circulating pump and perform application control;

[0008] Step 3: When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time.

[0009] The present invention provides a method for optimizing the sequential control of starting a first circulating pump, which monitors the working state of the first circulating pump in real time, obtains a preset sequential control strategy of the first circulating pump, and adds a butterfly valve opening control process at the initial start of the first circulating pump, and starts the first circulating pump according to the added sequential control strategy of the first circulating pump, including:

[0010] Determine the first circulating pump among the circulating pumps, and monitor the working status of the first circulating pump in real time, wherein the working status of the first circulating pump includes: running working status, starting working status, and stopping working status;

[0011] Obtain the preset sequential control strategy for the first circulating pump, divide the startup period when the first circulating pump is in the startup working state, add the butterfly valve opening control process at the initial startup of the first circulating pump, and determine the sequential control strategy for the first circulating pump after adding;

[0012] When it is monitored that the first circulating pump switches from the stopped working state to the running working state, the added sequential control strategy for the first circulating pump is applied.

[0013] The present invention provides a method for optimizing the sequential control of starting a first circulating pump, which divides the starting period when the first circulating pump is in a starting working state, including:

[0014] Divide the start-up period when the first circulating pump is in the start-up working state according to the pipeline status of the first circulating pump;

[0015] When the pipeline state of the first circulating pump is monitored to be an empty pipe state or a gas-liquid coexistence state, the startup period corresponding to the startup working state is divided into the initial startup period;

[0016] When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, the startup period of the corresponding startup working state is divided into the final startup period.

[0017] The present invention provides a method for optimizing the sequential control of the first circulating pump startup, adding a butterfly valve opening control process at the initial stage of the first circulating pump startup, and determining the sequential control strategy of the first circulating pump after the addition, including:

[0018] Divide the preset first circulating pump sequential control strategy into processes, and retrieve the preset butterfly valve opening control process in each process;

[0019] According to the working time of the first circulating pump, the preset first circulating pump sequential control strategy and the butterfly valve opening control process at the initial start-up of the first circulating pump are synchronously processed;

[0020] When it is retrieved that the preset butterfly valve opening control process in the preset first circulating pump sequential control strategy has a synchronized butterfly valve opening control process for the initial start-up of the first circulating pump, the process synchronization is replaced according to the butterfly valve opening control process for the initial start-up of the first circulating pump;

[0021] Otherwise, according to the synchronous processing result, the butterfly valve opening control process of the first circulating pump at the initial start-up stage is added.

[0022] The present invention provides a method for optimizing the sequential control of the start-up of the first circulating pump, which obtains the historical start-up data of the start-up of the first circulating pump and establishes a mapping relationship between the start-up data and the butterfly valve opening control data, including:

[0023] Obtain the historical startup data of the first circulating pump startup, remove the wrong data and error data, and summarize the data according to the collection time corresponding to the historical startup data, wherein the historical startup data includes: historical startup time data, historical startup pump speed data, historical startup temperature data, historical startup pressure data, historical startup flow data, and historical startup butterfly valve opening data;

[0024] Performing correlation analysis on the data summary results to establish a mapping relationship between startup data and butterfly valve opening control data;

[0025] Perform mapping verification on the mapping relationship, randomly input historical startup data, and when it is monitored that the output butterfly valve opening control data is consistent with the butterfly valve opening control data corresponding to the historical startup data or the error is not higher than the preset mapping error, the mapping verification is determined to be qualified;

[0026] Otherwise, the mapping relationship between the startup data and the butterfly valve opening control data is re-established.

[0027] The present invention provides a method for optimizing the sequential control of starting a first circulating pump, which determines the butterfly valve opening control data at the initial stage of starting the first circulating pump in combination with the outlet pressure data of the first circulating pump and performs application control, including:

[0028] Acquire the current startup data when the first circulating pump is started, and determine the first butterfly valve opening control data at the initial stage of the first circulating pump startup and perform application control according to the mapping relationship between the startup data and the butterfly valve opening control data;

[0029] Monitor the outlet pressure data of the first circulating pump in real time, and obtain the pressure protection constant value data for the start-up of the first circulating pump based on historical monitoring data;

[0030] Obtain the average outlet pressure data of the first circulating pump according to the historical startup data, and determine the pressure deviation data in combination with the outlet pressure data of the first circulating pump;

[0031] Determine the pressure protection deviation correction data of the first circulating pump according to the pressure protection customization data and the pressure deviation data;

[0032] When it is monitored that the outlet pressure data of the first circulating pump is not lower than the pressure protection correction data, it is determined that the outlet pressure data of the first circulating pump is abnormal, and a protection pump tripping strategy is executed for the first circulating pump;

[0033] Otherwise, when it is monitored that the outlet pressure data of the first circulating pump is not within the pressure range constructed by the average outlet pressure data and the pressure deviation data, the opening control data of the first butterfly valve is corrected according to the outlet pressure data of the first circulating pump to determine the opening control data of the second butterfly valve;

[0034] Among them, X2 represents the second butterfly valve opening control data; k1 represents the pipeline flow coefficient of the first circulating pump; ρ represents the flow density of the first circulating pump; d represents the pipeline radius of the first circulating pump; X1 represents the first butterfly valve opening control data; a1 represents the butterfly valve parameter data of the first circulating pump; k2 represents the butterfly valve flow coefficient of the first circulating pump; Q represents the flow data of the first circulating pump; F2 represents the outlet pressure data of the first circulating pump; F1 represents the inlet pressure data of the first circulating pump; F represents the pressure loss data of the first circulating pump; b1 represents the historical opening correction average value of the first circulating pump;

[0035] Obtain the butterfly valve opening control cycle according to the historical monitoring data, and use the second butterfly valve opening control data to obtain the predicted pressure control data and actual pressure control data of the next butterfly valve opening control cycle of the first circulating pump;

[0036] When the predicted pressure control data is inconsistent with the actual pressure control data, the pressure control error is obtained, and fuzzy quantitative control processing is performed in combination with the outlet pressure data of the first circulating pump to determine the second butterfly valve opening control data of the next butterfly valve opening control cycle and apply control in the next butterfly valve opening control cycle.

[0037] The present invention provides a method for optimizing the sequential control of starting a first circulating pump. When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the opening of the butterfly valve of the first circulating pump is controlled for the second time, including:

[0038] Obtain the water level signal of the condenser water chamber corresponding to the first circulating pump. When two or more water level signals are detected to be normal water level signals, it is determined that the water injection of the circulating water pipeline of the first circulating pump is completed.

[0039] Generate a control instruction for the secondary control of the first circulating pump, and issue the instruction according to the next butterfly valve opening control cycle. The butterfly valve opening of the second-controlled first circulating pump is adjusted to the maximum value of the butterfly valve opening and operates stably.

[0040] The present invention provides a method for optimizing the sequential control of starting a first circulating pump, further comprising:

[0041] Real-time monitoring of the first circulating pump's butterfly valve opening control data and the working status of the secondary control butterfly valve opening. When an abnormality is detected, the protection pump trip strategy is executed;

[0042] Obtain the butterfly valve opening control data of the first circulating pump and the stable time period from the outlet pressure data to the stable state when the butterfly valve opening is controlled for the second time, and dynamically adjust the butterfly valve opening control cycle based on historical monitoring data.

[0043] Compared with the prior art, the beneficial effects of this application are as follows:

[0044] By real-time monitoring of the working status of the first circulating pump, obtaining the preset sequential control strategy for the first circulating pump and adding the butterfly valve opening control process for the initial start-up of the first circulating pump, the first circulating pump is started; a mapping relationship between startup data and butterfly valve opening control data is established, and the butterfly valve opening control data for the initial start-up of the first circulating pump is determined in combination with the outlet pressure data of the first circulating pump and application control is performed; when the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time; the automation of the circulation pump startup is effectively realized, ensuring the safety of the circulation pump startup.

[0045] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0046] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0048] Figure 1 It is a flow chart of a method for optimizing the sequential control of starting a first circulating pump provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0050] Embodiment 1:

[0051] The embodiment of the present invention provides a method for optimizing the sequential control of the first circulating pump startup, such as Figure 1 As shown, including:

[0052] Step 1: Monitor the working status of the first circulating pump in real time, obtain the preset sequential control strategy of the first circulating pump, add the butterfly valve opening control process at the initial start-up of the first circulating pump, and start the first circulating pump according to the added sequential control strategy of the first circulating pump;

[0053] Step 2: Obtain the historical startup data of the first circulating pump, establish the startup data-dish valve opening control data mapping relationship, and determine the butterfly valve opening control data at the initial startup of the first circulating pump in combination with the outlet pressure data of the first circulating pump and perform application control;

[0054] Step 3: When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time.

[0055] In this embodiment, a sequential control strategy for the first circulating pump is preset. For example, when the first circulating pump is started, when the outlet butterfly valve is opened to a certain opening, the operator switches the outlet butterfly valve to the "near control" position according to the control instruction and stops the action, and keeps it at the middle opening position to inject water into the pipeline, thereby reducing the impact on the pipeline by controlling the circulating water flow rate; after the pressure of the circulating water main is stable and the high water level signal of the condenser water chamber is normal, the outlet butterfly valve is switched to the "remote control" position to open fully automatically, and the circulating water system resumes normal operation.

[0056] In this embodiment, the butterfly valve opening control process at the initial start-up of the first circulating pump, for example, performs butterfly valve opening control based on the historical start-up data of the first circulating pump or the outlet pressure data of the first circulating pump, and takes the normal water level signal of the condenser water chamber to perform butterfly valve opening control.

[0057] In this embodiment, the butterfly valve opening of the first circulating pump is controlled for the second time, that is, it is determined that the water injection of the circulating water pipeline of the first circulating pump is completed and the circulating water system is put into use, and the butterfly valve opening is fully opened.

[0058] The working principle and beneficial effects of the above technical scheme are: by real-time monitoring of the working status of the first circulating pump, obtaining the preset first circulating pump sequential control strategy and adding the butterfly valve opening control process for the initial start-up of the first circulating pump, the first circulating pump is started; a mapping relationship between startup data and butterfly valve opening control data is established, and the butterfly valve opening control data for the initial start-up of the first circulating pump is determined in combination with the outlet pressure data of the first circulating pump and application control is performed; when the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time; the automation of the circulation pump startup is effectively realized, ensuring the safety of the circulation pump startup.

[0059] Embodiment 2:

[0060] The embodiment of the present invention provides a method for optimizing the sequential control of starting a first circulating pump, which monitors the working status of the first circulating pump in real time, obtains a preset sequential control strategy for the first circulating pump, and adds a butterfly valve opening control process at the initial start of the first circulating pump, and starts the first circulating pump according to the added sequential control strategy for the first circulating pump, including:

[0061] Determine the first circulating pump among the circulating pumps, and monitor the working status of the first circulating pump in real time, wherein the working status of the first circulating pump includes: running working status, starting working status, and stopping working status;

[0062] Obtain the preset sequential control strategy for the first circulating pump, divide the startup period when the first circulating pump is in the startup working state, add the butterfly valve opening control process at the initial startup of the first circulating pump, and determine the sequential control strategy for the first circulating pump after adding;

[0063] When it is monitored that the first circulating pump switches from the stopped working state to the running working state, the added sequential control strategy for the first circulating pump is applied.

[0064] In this embodiment, the start-up period when the first circulating pump is in the start-up working state is divided for fine control of the butterfly valve opening to reduce the impact of the empty pipe start-up of the circulating pump on the equipment.

[0065] In this embodiment, when it is monitored that the first circulating pump switches from a stopped working state to an operating working state, the circulating water system is started and the first circulating pump is started with an empty pipe.

[0066] In this embodiment, the butterfly valve at the outlet of the circulating pump is automatically opened fully in the preset sequential control strategy of the first circulating pump, which may cause water hammer phenomenon and affect the safety of equipment operation.

[0067] The working principle and beneficial effects of the above technical solution are: real-time monitoring of the working status of the first circulating pump, obtaining the preset first circulating pump sequential control strategy and adding the butterfly valve opening control process at the initial start-up of the first circulating pump, and starting the first circulating pump according to the added first circulating pump sequential control strategy, which is conducive to ensuring the safety of the start-up of the first circulating pump.

[0068] Embodiment 3:

[0069] The embodiment of the present invention provides a method for optimizing the sequential control of starting a first circulating pump, which divides the starting period when the first circulating pump is in a starting working state, including:

[0070] Divide the start-up period when the first circulating pump is in the start-up working state according to the pipeline status of the first circulating pump;

[0071] When the pipeline state of the first circulating pump is monitored to be an empty pipe state or a gas-liquid coexistence state, the startup period corresponding to the startup working state is divided into the initial startup period;

[0072] When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, the startup period of the corresponding startup working state is divided into the final startup period.

[0073] In this embodiment, when it is monitored that the pipeline state of the first circulating pump is an empty pipe state or a gas-liquid coexistence state, the startup period corresponding to the startup working state is divided into the initial startup period. That is, if the first circulating pump directly automatically opens the circulating pump outlet butterfly valve in the initial startup period, water hammer phenomenon will occur, affecting the safety of equipment operation.

[0074] In this embodiment, when the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, the startup period of the corresponding startup working state is divided into the final startup period, that is, there is no water hammer phenomenon in the first circulating pump, the startup of the first circulating pump is completed, the butterfly valve opening can be fully opened, and the circulating water system resumes normal operation.

[0075] The working principle and beneficial effect of the above technical solution are: by dividing the startup period when the first circulating pump is in the startup working state, it is convenient to subsequently realize precise control of the butterfly valve opening, thereby realizing optimization of the startup sequence control of the first circulating pump.

[0076] Embodiment 4:

[0077] The embodiment of the present invention provides a method for optimizing the sequential control of starting a first circulating pump, adding a butterfly valve opening control process at the initial stage of starting the first circulating pump, and determining the sequential control strategy of the first circulating pump after adding, including:

[0078] Divide the preset first circulating pump sequential control strategy into processes, and retrieve the preset butterfly valve opening control process in each process;

[0079] According to the working time of the first circulating pump, the preset first circulating pump sequential control strategy and the butterfly valve opening control process at the initial start-up of the first circulating pump are synchronously processed;

[0080] When it is retrieved that the preset butterfly valve opening control process in the preset first circulating pump sequential control strategy has a synchronized butterfly valve opening control process for the initial start-up of the first circulating pump, the process synchronization is replaced according to the butterfly valve opening control process for the initial start-up of the first circulating pump;

[0081] Otherwise, according to the synchronous processing result, the butterfly valve opening control process of the first circulating pump at the initial start-up stage is added.

[0082] In this embodiment, the preset first circulating pump sequential control strategy is divided into processes to facilitate adding or replacing part of the first circulating pump sequential control process.

[0083] In this embodiment, the preset first circulating pump sequential control strategy and the butterfly valve opening control process of the initial start-up of the first circulating pump are synchronously processed according to the working time of the first circulating pump. For example, at the initial start-up time t1 of the circulating pump a1, the preset first circulating pump sequential control strategy b1 is: fully opening the butterfly valve of the first circulating pump; the butterfly valve opening control process b2 of the initial start-up of the first circulating pump is: determining the butterfly valve opening according to the outlet pressure data of the first circulating pump.

[0084] In this embodiment, when it is retrieved that the preset butterfly valve opening control process in the preset first circulating pump sequential control strategy has a synchronized butterfly valve opening control process for the initial startup of the first circulating pump, for example, at the initial startup time t1, b2 replaces b1 for butterfly valve opening control.

[0085] In this embodiment, according to the result of synchronization processing, the butterfly valve opening control process of the initial startup of the first circulating pump is added at the initial startup of the first circulating pump. For example, at the initial startup time t2 of the circulating pump a2, there is no preset first circulating pump sequential control strategy, that is, the butterfly valve opening of the first circulating pump is not controlled; there is a butterfly valve opening control process b3 of the initial startup of the first circulating pump: the butterfly valve opening is determined according to the outlet pressure data of the first circulating pump; then b3 is added.

[0086] The working principle and beneficial effect of the above technical solution are: by adding the butterfly valve opening control process at the initial start-up of the first circulating pump, the sequential control strategy of the first circulating pump after addition is determined, laying a strategic foundation for the subsequent realization of the automation of the start-up of the first circulating pump.

[0087] Embodiment 5:

[0088] The embodiment of the present invention provides a method for optimizing the sequential control of the start-up of the first circulating pump, which obtains the historical start-up data of the start-up of the first circulating pump and establishes a mapping relationship between the start-up data and the butterfly valve opening control data, including:

[0089] Obtain the historical startup data of the first circulating pump startup, remove the wrong data and error data, and summarize the data according to the collection time corresponding to the historical startup data, wherein the historical startup data includes: historical startup time data, historical startup pump speed data, historical startup temperature data, historical startup pressure data, historical startup flow data, and historical startup butterfly valve opening data;

[0090] Performing correlation analysis on the data summary results to establish a mapping relationship between startup data and butterfly valve opening control data;

[0091] Perform mapping verification on the mapping relationship, randomly input historical startup data, and when it is monitored that the output butterfly valve opening control data is consistent with the butterfly valve opening control data corresponding to the historical startup data or the error is not higher than the preset mapping error, the mapping verification is determined to be qualified;

[0092] Otherwise, the mapping relationship between the startup data and the butterfly valve opening control data is re-established.

[0093] In this embodiment, the data summary results are subjected to correlation analysis to establish a mapping relationship between startup data and butterfly valve opening control data. For example, historical startup pressure data a1 corresponds to butterfly valve opening control data b1, that is, the butterfly valve opening is b1.

[0094] In this embodiment, a mapping check is performed on the mapping relationship, and historical startup data is randomly input to verify the accuracy of the mapping relationship.

[0095] The working principle and beneficial effect of the above technical solution are: by acquiring the historical startup data of the first circulating pump, a mapping relationship between startup data and butterfly valve opening control data is established, which is conducive to the subsequent initial control of the butterfly valve opening, and then preliminarily realizes the optimization of the startup sequence control of the first circulating pump.

[0096] Embodiment 6:

[0097] The embodiment of the present invention provides a method for optimizing the sequential control of starting the first circulating pump, which determines the butterfly valve opening control data at the initial stage of starting the first circulating pump in combination with the outlet pressure data of the first circulating pump and performs application control, including:

[0098] Acquire the current startup data when the first circulating pump is started, and determine the first butterfly valve opening control data at the initial stage of the first circulating pump startup and perform application control according to the mapping relationship between the startup data and the butterfly valve opening control data;

[0099] Monitor the outlet pressure data of the first circulating pump in real time, and obtain the pressure protection constant value data for the start-up of the first circulating pump based on historical monitoring data;

[0100] Obtain the average outlet pressure data of the first circulating pump according to the historical startup data, and determine the pressure deviation data in combination with the outlet pressure data of the first circulating pump;

[0101] Determine the pressure protection deviation correction data of the first circulating pump according to the pressure protection customization data and the pressure deviation data;

[0102] When it is monitored that the outlet pressure data of the first circulating pump is not lower than the pressure protection correction data, it is determined that the outlet pressure data of the first circulating pump is abnormal, and a protection pump tripping strategy is executed for the first circulating pump;

[0103] Otherwise, when it is monitored that the outlet pressure data of the first circulating pump is not within the pressure range constructed by the average outlet pressure data and the pressure deviation data, the opening control data of the first butterfly valve is corrected according to the outlet pressure data of the first circulating pump to determine the opening control data of the second butterfly valve;

[0104] Among them, X2 represents the second butterfly valve opening control data; k1 represents the pipeline flow coefficient of the first circulating pump; ρ represents the flow density of the first circulating pump; d represents the pipeline radius of the first circulating pump; X1 represents the first butterfly valve opening control data; a1 represents the butterfly valve parameter data of the first circulating pump; k2 represents the butterfly valve flow coefficient of the first circulating pump; Q represents the flow data of the first circulating pump; F2 represents the outlet pressure data of the first circulating pump; F1 represents the inlet pressure data of the first circulating pump; F represents the pressure loss data of the first circulating pump; b1 represents the historical opening correction average value of the first circulating pump;

[0105] Obtain the butterfly valve opening control cycle according to the historical monitoring data, and use the second butterfly valve opening control data to obtain the predicted pressure control data and actual pressure control data of the next butterfly valve opening control cycle of the first circulating pump;

[0106] When the predicted pressure control data is inconsistent with the actual pressure control data, the pressure control error is obtained, and fuzzy quantitative control processing is performed in combination with the outlet pressure data of the first circulating pump to determine the second butterfly valve opening control data of the next butterfly valve opening control cycle and apply control in the next butterfly valve opening control cycle.

[0107] In this embodiment, the pressure protection constant value data for starting the first circulating pump refers to the threshold data of the outlet pressure data of the first circulating pump, that is, when the outlet pressure data of the first circulating pump is not lower than the pressure protection constant value data, the outlet pressure data of the first circulating pump is determined to be abnormal.

[0108] In this embodiment, the actual pressure protection data of each circulating pump may be inconsistent with the pressure protection set value data, that is, there is a certain deviation.

[0109] In this embodiment, the average outlet pressure data of the first circulation pump is obtained based on the historical startup data, and the pressure deviation data is determined in combination with the outlet pressure data of the first circulation pump. For example, the average outlet pressure data is a1, and the outlet pressure data of the first circulation pump b1 is a2, then the pressure deviation data of the first circulation pump b1 is a1-a2.

[0110] In this embodiment, based on the pressure protection customization data and the pressure deviation data, the pressure protection correction data of the first circulating pump is determined to refer to the actual pressure protection data of the first circulating pump. For example, the pressure protection constant data is a3, and the pressure deviation data of the first circulating pump b1 is a1-a2. Then the pressure protection correction data of the first circulating pump b1 is a3-(a1-a2).

[0111] In this embodiment, the protective pump tripping strategy is used to ensure the safety of the operation of the first circulating pump device.

[0112] In this embodiment, when it is monitored that the outlet pressure data of the first circulating pump is not within the pressure range constructed by the average outlet pressure data and the pressure deviation data, the outlet pressure data of the first circulating pump is acceptable but there is room for optimization.

[0113] The working principle and beneficial effect of the above technical solution are: by combining the outlet pressure data of the first circulating pump to determine the butterfly valve opening control data at the initial start-up of the first circulating pump and perform application control, the automation of the circulating pump start-up is effectively realized, ensuring the safety of the circulating pump start-up.

[0114] Embodiment 7:

[0115] The embodiment of the present invention provides a method for optimizing the sequential control of starting a first circulating pump. When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the opening of the butterfly valve of the first circulating pump is controlled for the second time, including:

[0116] Obtain the water level signal of the condenser water chamber corresponding to the first circulating pump. When two or more water level signals are detected to be normal water level signals, it is determined that the water injection of the circulating water pipeline of the first circulating pump is completed.

[0117] Generate a control instruction for the secondary control of the first circulating pump, and issue the instruction according to the next butterfly valve opening control cycle. The butterfly valve opening of the second-controlled first circulating pump is adjusted to the maximum value of the butterfly valve opening and operates stably.

[0118] In this embodiment, the number of condenser water chambers corresponding to the first circulating pump is generally 2-3.

[0119] In this embodiment, when two or more water level signals are detected to be normal water level signals, it is determined that the water injection into the circulating water pipeline of the first circulating pump is completed, so as to avoid affecting the butterfly valve opening control due to a single water level signal monitoring error.

[0120] The working principle and beneficial effect of the above technical solution are: when the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time, thereby further realizing the optimization of the startup sequence control of the first circulating pump.

[0121] Embodiment 8:

[0122] The embodiment of the present invention provides a method for optimizing the sequential control of starting a first circulating pump, further comprising:

[0123] Real-time monitoring of the first circulating pump's butterfly valve opening control data and the working status of the secondary control butterfly valve opening. When an abnormality is detected, the protection pump trip strategy is executed;

[0124] Obtain the butterfly valve opening control data of the first circulating pump and the stable time period from the outlet pressure data to the stable state when the butterfly valve opening is controlled for the second time, and dynamically adjust the butterfly valve opening control cycle based on historical monitoring data.

[0125] In this embodiment, when an abnormality is detected, a protection pump tripping strategy is executed, for example, the outlet pressure data of the first circulating pump is abnormal.

[0126] In this embodiment, the butterfly valve opening control cycle is dynamically adjusted in combination with historical monitoring data. For example, when the outlet pressure data is not stabilized within the existing t1 butterfly valve opening control cycle and the pressure data does not converge to stability during the secondary control of the butterfly valve opening, the butterfly valve opening control cycle is reduced to speed up the stable control of the pressure data.

[0127] The working principle and beneficial effect of the above technical solution are: by executing the protection pump tripping strategy and dynamically adjusting the butterfly valve opening control cycle, it is helpful to ensure the safety of the operation of the first circulating pump equipment.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for optimizing the sequential control of starting the first circulating pump, characterized in that: include: Step 1: Monitor the working status of the first circulating pump in real time, obtain the preset sequential control strategy of the first circulating pump, add the butterfly valve opening control process at the initial start-up of the first circulating pump, and start the first circulating pump according to the added sequential control strategy of the first circulating pump; Step 2: Obtain the historical startup data of the first circulating pump, establish the startup data-dish valve opening control data mapping relationship, and determine the butterfly valve opening control data at the initial startup of the first circulating pump in combination with the outlet pressure data of the first circulating pump and perform application control; Step 3: When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time.

2. The method for optimizing the start-up sequence control of the first circulating pump according to claim 1 is characterized in that: Monitor the working status of the first circulating pump in real time, obtain the preset first circulating pump sequential control strategy and add the butterfly valve opening control process at the initial start of the first circulating pump, and start the first circulating pump according to the added first circulating pump sequential control strategy, including: Determine the first circulating pump among the circulating pumps, and monitor the working status of the first circulating pump in real time, wherein the working status of the first circulating pump includes: running working status, starting working status, and stopping working status; Obtain the preset sequential control strategy for the first circulating pump, divide the startup period when the first circulating pump is in the startup working state, add the butterfly valve opening control process at the initial startup of the first circulating pump, and determine the sequential control strategy for the first circulating pump after adding; When it is monitored that the first circulating pump switches from the stopped working state to the running working state, the added sequential control strategy for the first circulating pump is applied.

3. The method for optimizing the start-up sequence control of the first circulating pump according to claim 2 is characterized in that: The start-up period when the first circulating pump is in the starting working state is divided into: Divide the start-up period when the first circulating pump is in the start-up working state according to the pipeline status of the first circulating pump; When the pipeline state of the first circulating pump is monitored to be an empty pipe state or a gas-liquid coexistence state, the startup period corresponding to the startup working state is divided into the initial startup period; When the water level signal of the condenser water chamber corresponding to the first circulating pump is monitored to be a normal water level signal, the startup period of the corresponding startup working state is divided into the final startup period.

4. The method for optimizing the start-up sequence control of the first circulating pump according to claim 2 is characterized in that: Add the butterfly valve opening control process for the initial startup of the first circulating pump, and determine the sequential control strategy for the first circulating pump after adding it, including: Divide the preset first circulating pump sequential control strategy into processes, and retrieve the preset butterfly valve opening control process in each process; According to the working time of the first circulating pump, the preset first circulating pump sequential control strategy and the butterfly valve opening control process at the initial start-up of the first circulating pump are synchronously processed; When it is retrieved that the preset butterfly valve opening control process in the preset first circulating pump sequential control strategy has a synchronized butterfly valve opening control process for the initial start-up of the first circulating pump, the process synchronization is replaced according to the butterfly valve opening control process for the initial start-up of the first circulating pump; Otherwise, according to the synchronous processing result, the butterfly valve opening control process of the first circulating pump at the initial start-up stage is added.

5. The method for optimizing the start-up sequence control of the first circulating pump according to claim 1 is characterized in that: Obtain the historical startup data of the first circulating pump startup and establish the startup data-dish valve opening control data mapping relationship, including: Obtain the historical startup data of the first circulating pump startup, remove the wrong data and error data, and summarize the data according to the collection time corresponding to the historical startup data, wherein the historical startup data includes: historical startup time data, historical startup pump speed data, historical startup temperature data, historical startup pressure data, historical startup flow data, and historical startup butterfly valve opening data; Performing correlation analysis on the data summary results to establish a mapping relationship between startup data and butterfly valve opening control data; Perform mapping verification on the mapping relationship, randomly input historical startup data, and when it is monitored that the output butterfly valve opening control data is consistent with the butterfly valve opening control data corresponding to the historical startup data or the error is not higher than the preset mapping error, the mapping verification is determined to be qualified; Otherwise, the mapping relationship between the startup data and the butterfly valve opening control data is re-established.

6. The method for optimizing the start-up sequence control of the first circulating pump according to claim 5 is characterized in that: Combined with the outlet pressure data of the first circulating pump, determine the butterfly valve opening control data at the initial start-up of the first circulating pump and perform application control, including: Acquire the current startup data when the first circulating pump is started, and determine the first butterfly valve opening control data at the initial stage of the first circulating pump startup and perform application control according to the mapping relationship between the startup data and the butterfly valve opening control data; Monitor the outlet pressure data of the first circulating pump in real time, and obtain the pressure protection constant value data for the start-up of the first circulating pump based on historical monitoring data; Obtain the average outlet pressure data of the first circulating pump according to the historical startup data, and determine the pressure deviation data in combination with the outlet pressure data of the first circulating pump; Determine the pressure protection deviation correction data of the first circulating pump according to the pressure protection customization data and the pressure deviation data; When it is monitored that the outlet pressure data of the first circulating pump is not lower than the pressure protection correction data, it is determined that the outlet pressure data of the first circulating pump is abnormal, and a protection pump tripping strategy is executed for the first circulating pump; Otherwise, when it is monitored that the outlet pressure data of the first circulating pump is not within the pressure range constructed by the average outlet pressure data and the pressure deviation data, the opening control data of the first butterfly valve is corrected according to the outlet pressure data of the first circulating pump to determine the opening control data of the second butterfly valve; Among them, X2 represents the second butterfly valve opening control data; k1 represents the pipeline flow coefficient of the first circulating pump; ρ represents the flow density of the first circulating pump; d represents the pipeline radius of the first circulating pump; X1 represents the first butterfly valve opening control data; a1 represents the butterfly valve parameter data of the first circulating pump; k2 represents the butterfly valve flow coefficient of the first circulating pump; Q represents the flow data of the first circulating pump; F2 represents the outlet pressure data of the first circulating pump; F1 represents the inlet pressure data of the first circulating pump; F represents the pressure loss data of the first circulating pump; b1 represents the historical opening correction average value of the first circulating pump; Obtain the butterfly valve opening control cycle according to the historical monitoring data, and use the second butterfly valve opening control data to obtain the predicted pressure control data and actual pressure control data of the next butterfly valve opening control cycle of the first circulating pump; When the predicted pressure control data is inconsistent with the actual pressure control data, the pressure control error is obtained, and fuzzy quantitative control processing is performed in combination with the outlet pressure data of the first circulating pump to determine the second butterfly valve opening control data of the next butterfly valve opening control cycle and apply control in the next butterfly valve opening control cycle.

7. The method for optimizing the start-up sequence control of the first circulating pump according to claim 1 is characterized in that: When the water level signal of the condenser water chamber corresponding to the first circulating pump is detected to be a normal water level signal, it is determined that the water injection of the circulating water pipeline is completed, and the butterfly valve opening of the first circulating pump is controlled for the second time, including: Obtain the water level signal of the condenser water chamber corresponding to the first circulating pump. When two or more water level signals are detected to be normal water level signals, it is determined that the water injection of the circulating water pipeline of the first circulating pump is completed. Generate a control instruction for the secondary control of the first circulating pump, and issue the instruction according to the next butterfly valve opening control cycle. The butterfly valve opening of the second-controlled first circulating pump is adjusted to the maximum value of the butterfly valve opening and operates stably.

8. The method for optimizing the start-up sequence control of the first circulating pump according to claim 1 is characterized in that: Also includes: Real-time monitoring of the first circulating pump's butterfly valve opening control data and the working status of the secondary control butterfly valve opening. When an abnormality is detected, the protection pump trip strategy is executed; Obtain the butterfly valve opening control data of the first circulating pump and the stable time period from the outlet pressure data to the stable state when the butterfly valve opening is controlled for the second time, and dynamically adjust the butterfly valve opening control cycle based on historical monitoring data.

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