Automatic control method and device for circulating water pump

Abstract

The application provides an automatic control method and device for a circulating water pump, comprising: obtaining the running parameters of each circulating water pump in an intercooling unit circulating water system and the state of each valve; wherein the circulating water pump comprises a first unit circulating water pump, a second unit circulating water pump and a common standby circulating water pump; controlling the common standby circulating water pump to enter an interlocked standby state according to the running parameters of each circulating water pump and the state of each valve; when the first unit circulating water pump or the second unit circulating water pump fails, starting the common standby circulating water pump in the interlocked standby state; wherein the failure comprises insufficient output and tripping. The application can control the interlocked starting and tripping protection of the circulating water system with two units and three pumps under different working conditions, so that one standby circulating water pump can provide reliable and effective standby for two unit circulating water pumps, effectively ensuring the safe and stable operation of the unit circulating water system.

Description

Technical Field

[0001] This application relates to the field of automatic control technology, specifically an automatic control method and device for a circulating water pump. Background Technology

[0002] In recent years, based on industry requirements regarding water consumption in coal-fired power generating units, an increasing number of power plants have gradually introduced air-cooling technology. Air-cooling technology is divided into two types: direct air-cooling and indirect air-cooling. Indirect air-cooling, due to its advantages such as water conservation, low power consumption, low cost, and low noise, has been widely used in thermal power units in water-scarce regions in recent years. Indirect air-cooling systems utilize circulating water to cool turbine exhaust steam, and the heated circulating water then enters a natural draft cooling tower, where it is cooled by the air. For indirect air-cooled units, each unit typically requires two 100% capacity circulating water pumps, one for operation and one for standby. Circulating water pumps are high-flow, low-pressure head equipment, resulting in significant investment per pump. To reduce investment, more and more power plants are choosing a two-unit, three-pump configuration, meaning two units are equipped with three 100% capacity circulating water pumps, ensuring each unit has one operating pump and one common standby pump.

[0003] In this configuration, the interlocking protection and automatic control logic of the circulating water pumps are more complex. If an accident occurs and the standby pump fails to start, it will cause the operating unit to trip. Furthermore, since two units share a single standby pump, if the circulating water pumps of the two units cannot be properly matched, it could even lead to a serious accident where both units trip simultaneously. Currently, for this configuration, the related switching and standby controls are mainly manual, resulting in a low level of automation. At the same time, the control logic of the shared standby pump is also imperfect. If operators make mistakes or fail to monitor properly, it can easily cause unit tripping or equipment damage. Summary of the Invention

[0004] To address the problems in the prior art, this application provides an automatic control method and device for circulating water pumps, which can control a circulating water system with two units and three pumps to complete the interlocking start-up and trip protection of the circulating water pumps under different operating conditions, so that one standby circulating water pump can provide reliable and effective backup for the circulating water pumps of two units at the same time, effectively ensuring the safe and stable operation of the unit's circulating water system.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] In a first aspect, this application provides an automatic control method for a circulating water pump, comprising:

[0007] Obtain the operating parameters of each circulating water pump in the circulating water system of the indirect-cooled unit; wherein, the circulating water pump includes the first unit circulating water pump, the second unit circulating water pump and the common standby circulating water pump;

[0008] Control the operation of each valve in the circulating water system of the indirect cooling unit, the circulating water pump of the first unit and the circulating water pump of the second unit, so that the common standby circulating water pump enters the interlock standby state;

[0009] When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlocked standby state is started; wherein, the failure includes insufficient output and tripping.

[0010] Furthermore, the second unit's circulating water pump is in a non-operating state; the valve includes a connecting valve between the first unit's circulating water pump and the common standby circulating water pump; controlling the operation of each valve in the intercooled unit's circulating water system, the first unit's circulating water pump, and the second unit's circulating water pump to put the common standby circulating water pump into an interlocked standby state includes:

[0011] The circulating water pump of the first unit is filled with water;

[0012] When it is detected that the first unit's circulating water pump has completed filling, the first unit's circulating water pump is started to realize the circulation of the first unit's water system;

[0013] Open the connecting valve between the first unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the first unit circulating water pump to enter the pipe of the common standby circulating water pump, and the common standby circulating water pump enters the interlocked standby state.

[0014] Further, the second unit circulating water pump is in operation; the valves include a connecting valve between the first unit circulating water pump and the common standby circulating water pump, and a connecting valve between the second unit circulating water pump and the common standby circulating water pump; controlling the operation of each valve in the intercooled unit circulating water system, the first unit circulating water pump, and the second unit circulating water pump to put the common standby circulating water pump into an interlocked standby state includes:

[0015] The circulating water pump of the first unit is filled with water;

[0016] When it is detected that the first unit's circulating water pump has completed filling, the first unit's circulating water pump is started to realize the circulation of the first unit's water system;

[0017] Open the connecting valve between the first unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the first unit circulating water pump to be injected into the pipe of the common standby circulating water pump.

[0018] Adjust the speed of the second unit's circulating water pump to balance the outlet circulating water pressure of the first unit's circulating water pump with the outlet circulating water pressure of the second unit's circulating water pump.

[0019] Open the connecting valve between the second unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the second unit circulating water pump to enter the pipe of the common standby circulating water pump, and the common standby circulating water pump enters the interlocked standby state.

[0020] Furthermore, the step of starting the common standby circulating water pump in interlocked standby mode when it is determined by detecting the operating parameters and the status of each valve that the first unit circulating water pump or the second unit circulating water pump has failed includes:

[0021] By detecting the operating parameters of the first unit's circulating water pump and whether the corresponding outlet and inlet valves are fully open, it can be determined whether the first unit's circulating water pump is in a tripped state.

[0022] By detecting the operating parameters of the second unit's circulating water pump and whether the corresponding outlet and inlet valves are fully open, it can be determined whether the second unit's circulating water pump is in a tripped state.

[0023] By detecting whether the outlet and inlet valves of the first unit's circulating water pump are both fully open, and by detecting whether the circulating water pressure in the outlet main pipe of the first unit's circulating water pump is less than a preset threshold after the first unit's circulating water pump has been running for a preset period of time, it can be determined whether the first unit's circulating water pump has experienced a power shortage fault.

[0024] By detecting whether the outlet and inlet valves of the second unit's circulating water pump are both fully open, and by detecting that the circulating water pressure in the outlet header of the second unit's circulating water pump is less than a preset threshold after the second unit's circulating water pump has been running for a preset period of time, it is determined whether the second unit's circulating water pump has experienced a power shortage fault.

[0025] If it is determined that the first unit circulating water pump is in a tripped state, the second unit circulating water pump is in a tripped state, the first unit circulating water pump has a power output failure, or the second unit circulating water pump has a power output failure, the common standby circulating water pump is controlled to operate, so as to realize the interlocked start of the common standby circulating water pump.

[0026] Furthermore, the automatic control method for the circulating water pump further includes: controlling the first unit circulating water pump to trip when any preset tripping condition of the first unit circulating water pump is met; wherein, the tripping condition of the first unit circulating water pump includes: the motor stator coil temperature of the first unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0027] Furthermore, the automatic control method for the circulating water pump further includes: controlling the second unit circulating water pump to trip when any preset tripping condition of the second unit circulating water pump is met; wherein, the tripping condition of the second unit circulating water pump includes: the motor stator coil temperature of the second unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0028] Furthermore, the automatic control method for the circulating water pump further includes: controlling the common standby circulating water pump to trip when any preset tripping condition of the common standby circulating water pump is met; wherein the tripping condition of the common standby circulating water pump includes: the temperature of the standby component exceeds a threshold; the outlet valve is fully closed and not open; in the operating state, the inlet connecting valves between the first unit circulating water pump and the common standby circulating water pump and the inlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open; in the operating state, the outlet connecting valves between the first unit circulating water pump and the common standby circulating water pump and the outlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open.

[0029] Furthermore, the automatic control method for the circulating water pump further includes: when all preset starting conditions for the first unit circulating water pump are met, setting the first unit circulating water pump to have the starting conditions; wherein, the starting conditions for the first unit circulating water pump include: the temperature of the motor stator coil of the first unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0030] Furthermore, the automatic control method for the circulating water pump further includes: when all preset starting conditions for the second unit circulating water pump are met, setting the second unit circulating water pump to have the starting conditions; wherein, the starting conditions for the second unit circulating water pump include: the temperature of the motor stator coil of the second unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0031] Furthermore, the automatic control method for the circulating water pump further includes: when all preset start-up conditions for the common standby circulating water pump are met, setting the common standby circulating water pump to be ready for start-up; wherein, the start-up conditions for the common standby circulating water pump include:

[0032] The temperature of the spare components does not exceed the threshold.

[0033] The inlet gate of the public backup circulating water pump, the outlet connecting gate between the first unit circulating water pump and the public backup circulating water pump, the inlet gate of the public backup circulating water pump, and the inlet connecting gate between the second unit circulating water pump and the public backup circulating water pump are all in a first preset state; and

[0034] The outlet valve of the public backup circulating water pump, the outlet connecting valve between the first unit circulating water pump and the public backup circulating water pump, the outlet valve of the public backup circulating water pump, and the outlet connecting valve between the second unit circulating water pump and the public backup circulating water pump are all in a second preset state; and

[0035] The communication valve between the first unit circulating water pump and the common standby circulating water pump, the communication valve between the second unit circulating water pump and the common standby circulating water pump, the liquid level of the expansion tank of the intercooling tower of the first unit circulating water pump, and the liquid level of the expansion tank of the intercooling tower of the second unit circulating water pump are all in a third preset state.

[0036] Secondly, this application provides an automatic control device for a circulating water pump, comprising:

[0037] The operating parameter acquisition unit is used to acquire the operating parameters of each circulating water pump in the circulating water system of the intercooled unit; wherein, the circulating water pump includes a first unit circulating water pump, a second unit circulating water pump and a common standby circulating water pump;

[0038] The interlocking standby control unit is used to control the operation of each valve in the circulating water system of the intercooled unit, the first unit circulating water pump and the second unit circulating water pump, so that the common standby circulating water pump enters the interlocking standby state.

[0039] The common standby water pump interlocking start unit is used to start the common standby circulating water pump in the interlocking standby state when it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed; wherein, the failure includes insufficient output and tripping.

[0040] Furthermore, in the automatic control device for the circulating water pump, the second unit's circulating water pump is in a non-operating state; the valve includes a connecting valve between the first unit's circulating water pump and the common standby circulating water pump; the interlocking standby control unit includes:

[0041] The first water pump filling module is used to fill the first unit's circulating water pump with water;

[0042] The first unit circulation module is used to start the first unit circulation pump to realize the circulation of the first unit water system when it is detected that the first unit circulation pump has completed filling.

[0043] The first common circulation water injection module is used to open the connection valve between the first unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the first unit circulation water pump is injected into the pipe of the common standby circulation water pump, and the common standby circulation water pump enters the interlock standby state.

[0044] Furthermore, the second unit's circulating water pump is in operation; the valves include a connecting valve between the first unit's circulating water pump and the common standby circulating water pump, and a connecting valve between the second unit's circulating water pump and the common standby circulating water pump; the interlocking standby control unit includes:

[0045] The first water pump filling module is used to fill the first unit's circulating water pump with water;

[0046] The first unit circulation module is used to start the first unit circulation pump to realize the circulation of the first unit water system when it is detected that the first unit circulation pump has completed filling.

[0047] The first common circulation water injection module is used to open the connection valve between the first unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the first unit circulation water pump is injected into the pipe of the common standby circulation water pump.

[0048] The pressure balance adjustment module is used to adjust the speed of the second unit's circulating water pump so that the outlet circulating water pressure of the first unit's circulating water pump and the outlet circulating water pressure of the second unit's circulating water pump reach a balance.

[0049] The second common circulation water injection module is used to open the connection valve between the second unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the second unit circulation water pump is injected into the pipe of the common standby circulation water pump, and the common standby circulation water pump enters the interlock standby state.

[0050] Furthermore, the public backup water pump interlock start unit includes:

[0051] The first pump tripping judgment module is used to determine whether the first unit circulating water pump is in a tripping state by detecting the operating parameters of the first unit circulating water pump and whether the corresponding outlet gate and inlet gate are both in a fully open state.

[0052] The second pump tripping judgment module is used to detect the operating parameters of the second unit's circulating water pump and whether the corresponding outlet and inlet gates are fully open, and to determine whether the second unit's circulating water pump is in a tripping state.

[0053] The first pump output judgment module is used to determine whether the first unit circulating water pump has a power shortage fault by detecting whether the outlet gate and inlet gate of the first unit circulating water pump are both fully open, and whether the circulating water pressure of the outlet main pipe of the first unit circulating water pump is less than a preset threshold after the first unit circulating water pump has been running for a preset time period.

[0054] The second pump output judgment module is used to determine whether the second unit circulating water pump has a power shortage fault by detecting whether the outlet and inlet gates of the second unit circulating water pump are both fully open, and by detecting that the circulating water pressure of the outlet main pipe of the second unit circulating water pump is less than a preset threshold after the second unit circulating water pump has been running for a preset time period.

[0055] The common standby water pump interlocking start module is used to control the operation of the common standby circulating water pump to realize the interlocking start of the common standby circulating water pump if it is determined that the first unit circulating water pump is in a tripped state, the second unit circulating water pump is in a tripped state, the first unit circulating water pump has a power shortage fault, or the second unit circulating water pump has a power shortage fault.

[0056] Furthermore, the automatic control device for the circulating water pump further includes: a first water pump tripping unit, used to control the first unit circulating water pump to trip when any preset tripping condition of the first unit circulating water pump is met; wherein, the tripping condition of the first unit circulating water pump includes: the temperature of the motor stator coil of the first unit circulating water pump exceeds a threshold, the temperature of the motor bearing exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0057] Furthermore, the automatic control device for the circulating water pump further includes: a second water pump tripping unit, used to control the second unit circulating water pump to trip when any preset second unit circulating water pump tripping condition is met; wherein, the second unit circulating water pump tripping condition includes: the motor stator coil temperature of the second unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0058] Furthermore, the automatic control device for the circulating water pump further includes: a standby water pump tripping unit, used to control the common standby circulating water pump to trip when any preset common standby circulating water pump tripping condition is met; wherein, the common standby circulating water pump tripping condition includes: the standby component temperature exceeding a threshold; the outlet valve being fully closed and not open; in the operating state, the inlet connecting valves between the first unit circulating water pump and the common standby circulating water pump, and the inlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open; in the operating state, the outlet connecting valves between the first unit circulating water pump and the common standby circulating water pump, and the outlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open.

[0059] Furthermore, the automatic control device for the circulating water pump further includes: a first water pump starting unit, used to set the first unit circulating water pump to have the starting conditions when all preset starting conditions for the first unit circulating water pump are met; wherein, the starting conditions for the first unit circulating water pump include: the temperature of the motor stator coil of the first unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0060] Furthermore, the automatic control device for the circulating water pump further includes: a second water pump starting unit, used to set the second unit circulating water pump to meet the starting conditions when all preset starting conditions for the second unit circulating water pump are met; wherein, the starting conditions for the second unit circulating water pump include: the temperature of the motor stator coil of the second unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0061] Furthermore, the automatic control device for the circulating water pump further includes: a standby water pump starting unit, used to set the common standby circulating water pump to meet the starting conditions when all preset common standby circulating water pump starting conditions are met; wherein, the common standby circulating water pump starting conditions include:

[0062] The temperature of the spare components does not exceed the threshold.

[0063] The inlet gate of the public backup circulating water pump, the outlet connecting gate between the first unit circulating water pump and the public backup circulating water pump, the inlet gate of the public backup circulating water pump, and the inlet connecting gate between the second unit circulating water pump and the public backup circulating water pump are all in a first preset state; and

[0064] The outlet valve of the public backup circulating water pump, the outlet connecting valve between the first unit circulating water pump and the public backup circulating water pump, the outlet valve of the public backup circulating water pump, and the outlet connecting valve between the second unit circulating water pump and the public backup circulating water pump are all in a second preset state; and

[0065] The communication valve between the first unit circulating water pump and the common standby circulating water pump, the communication valve between the second unit circulating water pump and the common standby circulating water pump, the liquid level of the expansion tank of the intercooling tower of the first unit circulating water pump, and the liquid level of the expansion tank of the intercooling tower of the second unit circulating water pump are all in a third preset state.

[0066] Thirdly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the automatic control method for the circulating water pump.

[0067] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the automatic control method for the circulating water pump.

[0068] Fifthly, this application provides a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of the automatic control method for the circulating water pump.

[0069] To address the problems in existing technologies, the automatic control method and device for circulating water pumps provided in this application can control a circulating water system with a two-unit, three-pump configuration to complete the interlocked start-up and trip protection of the circulating water pumps under different operating conditions. This allows one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of two units simultaneously, effectively ensuring the safe and stable operation of the unit's circulating water system. When equipment failure occurs, the common standby circulating water pump can quickly execute the interlocked start command, preventing generator unit shutdown accidents caused by circulating water system outages. The automatic control method and device for circulating water pumps provided in this application can achieve fully automated control of the circulating water system commissioning, reducing cumbersome operating procedures for operators, avoiding errors that may be caused by manual operation, and achieving accurate judgment and control during commissioning. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0071] Figure 1 This is a flowchart of the automatic control method for the circulating water pump in the embodiments of this application;

[0072] Figure 2 This is a flowchart illustrating the process of placing the public backup circulating water pump into an interlocked standby state in an embodiment of this application;

[0073] Figure 3 This is a flowchart illustrating the process of placing the public backup circulating water pump into an interlocked standby state in an embodiment of this application;

[0074] Figure 4 This is a flowchart illustrating the startup of the common backup circulating water pump in an embodiment of this application;

[0075] Figure 5 This is a structural diagram of the automatic control device for the circulating water pump in the embodiments of this application;

[0076] Figure 6 This is one of the structural diagrams of the interlocking backup control unit in the embodiments of this application;

[0077] Figure 7 This is the second structural diagram of the interlocking backup control unit in the embodiments of this application;

[0078] Figure 8 This is a structural diagram of the common backup water pump interlocking start unit in the embodiments of this application;

[0079] Figure 9 This is a schematic diagram of the circulating water system of a typical indirect cooling unit with two units and three pumps in an embodiment of this application;

[0080] Figure 10 This is a flowchart of a control method for automatically starting a circulating water system in a two-unit, three-pump configuration of an indirect-cooled unit, as described in this application.

[0081] Figure 11 This is a schematic diagram of the structure of the electronic device in the embodiments of this application. Detailed Implementation

[0082] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0083] The acquisition, storage, use, and processing of data in this application all comply with the relevant provisions of national laws and regulations.

[0084] In one embodiment, see Figure 1In order to control the interlocking start-up and trip protection of the circulating water pumps in a two-unit, three-pump configuration circulating water system under different operating conditions, and to enable one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of both units simultaneously, thereby effectively ensuring the safe and stable operation of the unit's circulating water system, this application provides an automatic control method for circulating water pumps, including:

[0085] S101: Obtain the operating parameters of each circulating water pump in the circulating water system of the indirect-cooled unit; wherein, the circulating water pump includes the first unit circulating water pump, the second unit circulating water pump and the common standby circulating water pump;

[0086] S102: Control the operation of each valve in the circulating water system of the intercooled unit, the circulating water pump of the first unit and the circulating water pump of the second unit, so that the common standby circulating water pump enters the interlock standby state;

[0087] S103: When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlock standby state is started; wherein, the failure includes insufficient output and tripping.

[0088] Understandable, Figure 9 This diagram illustrates a typical circulating water system for a two-unit, three-pump configuration of an indirect-cooled turbine unit, comprising: a controller 1, a circulating water pump for Unit 1 2, a common standby circulating water pump 3, a circulating water pump for Unit 2 4, a condenser for Unit 1 5, an indirect-cooling tower for Unit 1 6, an inlet valve for the circulating water pump for Unit 1 7, an outlet valve for the circulating water pump for Unit 1 8, an inlet valve for the common standby circulating water pump 9, an outlet valve for the common standby circulating water pump 10, an inlet valve for the circulating water pump for Unit 2 11, an outlet valve for the circulating water pump for Unit 2 12, a connecting valve between the inlet valves of Unit 1 and the standby pump 13, a connecting valve between the inlet valves of Unit 2 and the standby pump 14, a connecting valve between the outlet valves of Unit 1 and the standby pump 15, a connecting valve between the outlet valves of Unit 2 and the standby pump 16, an inlet valve for the charging pump 17, a charging pump 18, and a charging pump outlet valve 19. The circulating water pump for Unit 1 is also referred to as the first unit circulating water pump; the circulating water pump for Unit 2 is also referred to as the second unit circulating water pump.

[0089] The exhaust steam from Unit 1's turbine is cooled by circulating water in Unit 1's condenser 5. The heated circulating water is then divided into two paths: one path connects to the inlet of Unit 1's circulating water pump 2 via Unit 1's circulating water pump inlet valve 7, and the other path connects to the inlet of the common standby circulating water pump 9 via Unit 1's standby pump inlet connection valve 13. Similarly, the hot circulating water from Unit 2 is also divided into two paths: one path connects to the inlet of Unit 2's circulating water pump 4 via Unit 2's circulating water pump inlet valve 11, and the other path connects to the inlet of the common standby circulating water pump 9 via Unit 2's standby pump inlet connection valve 14. The outlet of Unit 1's circulating water pump 2 is connected to Unit 1's circulating water pump outlet valve 8 via a pipeline, and the outlet of Unit 2's circulating water pump 4 is connected to Unit 2's circulating water pump outlet valve 8 via a pipeline. The circulating water pump outlet valve 12 of Unit 1 is connected to the common standby circulating water pump 9. The outlet of the common standby circulating water pump 9 is split into two paths after passing through the common standby circulating water pump outlet valve 10. One path passes through the Unit 2 and standby pump outlet connection valve 16 and merges with the pipeline after the Unit 2 circulating water pump outlet valve to the Unit 2 intercooling tower (not shown). The other path passes through the Unit 1 and standby pump outlet connection valve 15 and merges with the pipeline after the Unit 1 circulating water pump outlet valve 8 to the Unit 1 intercooling tower 6. After being cooled in the Unit 1 intercooling tower 6, the circulating water is connected to the inlet of the Unit 1 condenser 5 through a pipeline. In addition, the demineralized water is connected to the inlet of the charging pump 18 through the charging pump inlet valve 17, and its outlet pipeline is connected to the circulating water outlet pipeline of the condenser 5 after passing through the charging pump outlet valve 19.

[0090] Under certain operating conditions, the circulating water pump of the first or second unit may malfunction due to insufficient output or tripping. In such cases, the common standby circulating water pump needs to be started to replace the output of the first and / or second unit circulating water pumps. However, before starting the common standby circulating water pump, it should be put into interlock standby mode.

[0091] As described above, the automatic control method for circulating water pumps provided in this application can control the interlocking start-up and trip protection of the circulating water pumps in a two-unit, three-pump configuration circulating water system under different operating conditions. This allows one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of both units simultaneously, effectively ensuring the safe and stable operation of the unit's circulating water system. When equipment malfunctions, the common standby circulating water pump can quickly execute the interlocking start command, preventing generator unit shutdowns due to circulating water system outages. The automatic control method and device for circulating water pumps provided in this application can achieve fully automated control of the circulating water system commissioning process, reducing tedious operating procedures for operators, avoiding errors that may occur due to manual operation, and achieving precise judgment and control during commissioning.

[0092] The following provides a detailed explanation of steps S101 to S103.

[0093] Step S101: Obtain the operating parameters of each circulating water pump in the circulating water system of the intercooled unit; wherein, the circulating water pump includes the first unit circulating water pump, the second unit circulating water pump and the common standby circulating water pump.

[0094] Understandably, controller 1 collects real-time data via signal cables, including the liquid level H1 in the expansion tank of unit 1's intercooling tower, the liquid level H2 in the expansion tank of unit 2's intercooling tower, the circulating water pressure p1 in the outlet header of unit 1's circulating water pump, the circulating water pressure p2 in the outlet header of unit 2's circulating water pump, the circulating water pressure p3 in the outlet header of the common standby circulating water pump, and the stator coil temperature t of unit 1's circulating water pump motor. a1 Temperature of the bearing of the circulating water pump motor of Unit 1 (t) a2 Unit 1 circulating water pump bearing temperature t a3 Unit 1 circulating water pump inlet circulating water pressure p a Temperature t of the stator coil of the circulating water pump motor of Unit 2 b1 Temperature of the bearing of the circulating water pump motor of Unit 2 (t) b2 Unit 2 circulating water pump bearing temperature t b3 Unit 2 circulating water pump inlet circulating water pressure p b Public backup circulating water pump motor stator coil temperature t c1 Public backup circulating water pump motor bearing temperature t c2 Public backup circulating water pump bearing temperature t c3 Public backup circulating water pump inlet circulating water pressure p c The controller 1 also collects the operating status and inlet / outlet valve status of four pumps—the No. 1 unit circulating water pump, the No. 2 unit circulating water pump, the common standby circulating water pump, and the charging pump—via signal cables. Furthermore, the controller 1 controls the start / stop of the four pumps and the opening / closing of their inlet / outlet valves via signal cables. The preferred sampling scan period for the controller 1 is 200ms.

[0095] As can be seen from the above description, the automatic control method for circulating water pumps provided in this application can obtain the operating parameters of each circulating water pump in the circulating water system of the intercooled unit.

[0096] Step S102: Control the operation of each valve in the circulating water system of the intercooled unit, the circulating water pump of the first unit and the circulating water pump of the second unit, so that the common standby circulating water pump enters the interlock standby state.

[0097] It is understandable that step S102 is that the controller 1 controls the operation of various valves, the first unit circulating water pump, the second unit circulating water pump and the filling pump in the intercooled unit circulating water system through the signal cable, so that the common standby circulating water pump completes water filling and establishes water system circulation with the first unit circulating water pump and / or the second unit circulating water pump, thereby entering the interlock standby state.

[0098] Figure 2 This is a specific embodiment of the automatic control method for circulating water pumps implemented in this application.

[0099] In one embodiment, see Figure 2 The second unit circulating water pump is in a non-operating state; the valve includes a connecting valve between the first unit circulating water pump and the common standby circulating water pump; controlling the operation of each valve in the intercooled unit circulating water system, the first unit circulating water pump, and the second unit circulating water pump to put the common standby circulating water pump into an interlocked standby state includes: filling the first unit circulating water pump with water (S201); when it is detected that the first unit circulating water pump has been filled with water, starting the first unit circulating water pump to realize the circulation of the first unit water system (S202); opening the connecting valve between the first unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the first unit circulating water pump to enter the pipe of the common standby circulating water pump, and the common standby circulating water pump enters the interlocked standby state (S203).

[0100] It is understood that in this embodiment, the second unit's circulating water pump is in a non-operating state; in other words, only the first unit's circulating water pump is in operation. See also Figure 10 Steps 1001 to 1007 and 1010 in the above steps. Under this operating condition, the common standby circulating water pump only needs to provide backup for the first unit's circulating water pump. That is, the common standby circulating water pump only needs to establish a water system circulation with the first unit's circulating water pump to enter the interlocked standby state.

[0101] Step 1001: Close the inlet connection valve 13 between Unit 1 and the standby pump, the inlet connection valve 14 between Unit 2 and the standby pump, the outlet connection valve 15 between Unit 1 and the standby pump, and the outlet connection valve 16 between Unit 2 and the standby pump. Open the inlet valve 7 and the outlet valve 8 of the circulating water pump of Unit 1.

[0102] Before filling the circulating water system of Unit 1 with water, a system inspection must be carried out first. The circulating water system should be connected and the pipeline connecting it to the common circulating water standby pump should be disconnected. Specifically, close the inlet connection valve 13 between Unit 1 and the standby pump, the inlet connection valve 14 between Unit 2 and the standby pump, the outlet connection valve 15 between Unit 1 and the standby pump, and the outlet connection valve 16 between Unit 2 and the standby pump, and open the inlet valve 7 and the outlet valve 8 of the circulating water pump of Unit 1.

[0103] Step 1002: Confirm that the drain valve of the Unit 1 circulating water system (not shown) and the drain valve of the Unit 1 circulating water pump 2 (not shown) are both open. Open the inlet valve 17 of the charging pump, start the charging pump 18, and simultaneously open the outlet valve 19 of the charging pump. The drain valve of the Unit 1 circulating water system is located at a relatively high point in the system, and there are generally 2-4 valves, used to discharge air from the circulating water system. The drain valve of the Unit 1 circulating water pump is located at the highest point of the pump body, used to discharge air from the pump body.

[0104] After the circulating water system of Unit 1 is connected, confirm that all drain valves (not shown) of the circulating water system of Unit 1 and the drain valve of the circulating water pump 2 of Unit 1 (not shown) are open. Open the inlet valve 17 of the charging pump, start the charging pump 18, and simultaneously interlock and open the outlet valve 19 of the charging pump to start filling the circulating water system with water. During the water filling process, the inspection personnel should pay attention to checking the system for leaks. When water is continuously seen through all drain valves (not shown), they can be manually closed.

[0105] Step 1003: After H1 > a certain set value d, stop the water filling pump 18 and interlock to close the water filling pump outlet gate 19.

[0106] As the circulating water system pipelines fill with water, the liquid level in the expansion tank of the indirect cooling tower will gradually rise. When the liquid level H1 in the expansion tank of Unit 1's indirect cooling tower exceeds a certain set value d, the water filling pump 18 is stopped, and the water filling pump outlet valve 19 is simultaneously interlocked and closed to stop water injection into the system. The value of d is determined by the actual operating conditions of the unit. For example, in a certain embodiment, d is taken as 0.8m.

[0107] Step 1004: After a pause of approximately 20 minutes, monitor whether H1 > d is still satisfied. If it is satisfied, proceed to the next step; if not, repeat steps 1002 to 1004.

[0108] To ensure sufficient water filling of the circulating water system, water replenishment is stopped when the liquid level H1 in the expansion tank of Unit 1's intercooling tower exceeds a certain set value d. If the liquid level in the expansion tank drops below d within 20 minutes, it indicates that there is still air in the system and it is not fully filled with water. In this case, the water filling pump needs to be restarted to fill the system with water again. If the liquid level in the expansion tank is still greater than d within 20 minutes, it indicates that the circulating water system has been fully filled with water.

[0109] Step 1005: Close the outlet gate 8 of the circulating water pump of Unit 1, then start the circulating water pump 2 of Unit 1 and interlock to open the outlet gate 8 of the circulating water pump of Unit 1.

[0110] After the circulating water system of Unit 1 is filled with water, close the outlet valve 8 of the circulating water pump of Unit 1 to meet the start-up conditions and prevent the starting current of the circulating water pump motor from being too high. Then start the circulating water pump 2 of Unit 1. At the same time, interlock and open the outlet valve 8 of the circulating water pump of Unit 1. The circulating water system of Unit 1 is now started.

[0111] Step 1006: Confirm that the vent valve (not shown) of the public standby circulating water pump 3 is open, and slightly open its inlet and outlet valves to 8%, and slightly open the connection valve between Unit 1 and the standby pump to 13% to 8%. The vent valve of the public standby circulating water pump is located at the highest point of the pump body and is used to discharge air from the pump body of the circulating water pump.

[0112] After the circulating water system of Unit 1 is started, water is injected into the public standby circulating water pump 3. Since the circulating water at the inlet and outlet of Unit 1 is pressurized, the water injection process needs to be carried out slowly. After confirming that the pump body vent valve (not shown) of the public standby circulating water pump 3 is open, slightly open the public standby circulating water pump inlet valve 9 and the public standby circulating water pump outlet valve 10 to 8%, and slightly open the connection valve between Unit 1 and the standby pump inlet valve 13 to 8%. Inject the circulating water in the inlet pipeline of Unit 1 into the pipeline of the public standby circulating water pump. During this period, after the pump body of the public standby circulating water pump 3 is emptied and water is continuously seen, manually close it.

[0113] Step 1007: When p c >p a -0.03MPa, and p3>p a When the pressure is -0.03MPa, close the outlet valve 10 of the public standby circulating water pump and fully open the inlet and outlet valves 13 of the No. 1 unit and the standby pump, and the inlet valve 9 of the public standby circulating water pump.

[0114] When the circulating water pressure at the inlet and outlet of the public standby circulating water pump reaches equilibrium with the inlet circulating water pressure of Unit 1 circulating water pump 2 (by p) c >p a -0.03MPa, and p3>p a If the pressure drops to -0.03 MPa, it indicates that the public standby circulating water pump pipeline has been filled with water. At this time, the outlet valve 10 of the public standby circulating water pump can be closed, and the inlet and outlet connecting valve 13 between Unit 1 and the standby pump and the inlet valve 9 of the public standby circulating water pump can be fully opened, thus connecting the public standby circulating water pump system with the circulating water system of Unit 1.

[0115] Step 1010: Put the public standby circulating water pump 3 into interlock standby mode.

[0116] After the public standby circulating water pump pipeline is filled with water and the system is connected, the public standby circulating water pump will be put into interlock standby mode. When the circulating water pump 2 of Unit 1 fails and trips or has insufficient output, the public standby circulating water pump 3 can be automatically started to ensure the normal operation of the circulating water system of Unit 1.

[0117] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the operation of each valve in the circulating water system of the intercooled unit, the first unit circulating water pump and the second unit circulating water pump, so that the common standby circulating water pump enters the interlock standby state.

[0118] Figure 3 This is a specific embodiment of the automatic control method for circulating water pumps implemented in this application.

[0119] In one embodiment, see Figure 3 The second unit circulating water pump is in operation; the valves include a connecting valve between the first unit circulating water pump and the common standby circulating water pump, and a connecting valve between the second unit circulating water pump and the common standby circulating water pump; controlling the operation of each valve in the intercooled unit circulating water system, the first unit circulating water pump, and the second unit circulating water pump to put the common standby circulating water pump into an interlocked standby state includes: filling the first unit circulating water pump with water (S301); when the filling of the first unit circulating water pump is detected to be complete, starting the first unit circulating water pump to realize the circulation of the first unit water system (S302); opening the... The connecting valve between the first unit circulating water pump and the common standby circulating water pump is opened to allow circulating water from the inlet pipe of the first unit circulating water pump to enter the pipe of the common standby circulating water pump (S303); the rotation speed of the second unit circulating water pump is adjusted to balance the outlet circulating water pressure of the first unit circulating water pump and the outlet circulating water pressure of the second unit circulating water pump (S304); the connecting valve between the second unit circulating water pump and the common standby circulating water pump is opened to allow circulating water from the inlet pipe of the second unit circulating water pump to enter the pipe of the common standby circulating water pump, and the common standby circulating water pump enters the interlocked standby state (S305).

[0120] It is understood that in this embodiment, the second unit's circulating water pump is in operation; in other words, the circulating water pumps in operation include both the first unit's circulating water pump and the second unit's circulating water pump. See also Figure 10Steps 1001 to 1010 are described in the following steps. Under this operating condition, the common standby circulating water pump needs to provide backup for both the first and second unit circulating water pumps. When any pump trips or has insufficient output, the common standby circulating water pump must be interlocked and started. Therefore, the common standby circulating water pump needs to establish water system circulation with both the first and second unit circulating water pumps before it can enter the interlocked standby state.

[0121] Continuing from the previous example, step 1008: If the circulating water pump 4 of Unit 2 is in operation, adjust the output of the circulating water pump 4 of Unit 2 (by adjusting the pump speed) until |p3-p2| < 0.02MPa is met; if the circulating water pump 4 of Unit 2 is in a stopped state, skip to step 1010.

[0122] To determine whether the circulating water system of Unit 2 is in operation, if it is in operation, the output of circulating water pump 4 of Unit 2 needs to be adjusted to balance the outlet circulating water pressure of the two pumps before the inlet and outlet connecting valves can be opened. If the circulating water system of Unit 2 is not in operation, there is no need to open the inlet and outlet connecting valves 14 between Unit 2 and the standby pump. The common standby circulating water pump 3 only needs to be on standby for circulating water pump 2 of Unit 1.

[0123] Step 1009: Slightly open the inlet and outlet connecting valve 14 of Unit 2 and the standby pump to 10%, then open it by 10% every 5 minutes until it reaches 50%, and then fully open the inlet and outlet connecting valve 14 of Unit 2 and the standby pump.

[0124] Once the outlet circulating water pressure of Unit 1's circulating water pump 2 and Unit 2's circulating water pump 4 reach relative equilibrium, slowly open the inlet / outlet connection valve 14 between Unit 2 and the standby pump. During this process, monitor the liquid level in the expansion tank of the cooling tower between the two units. Finally, fully open the inlet / outlet connection valve 14 between Unit 2 and the standby pump to connect the common standby circulating water pump system with the circulating water system of Unit 2.

[0125] Step 1010: Put the public standby circulating water pump 3 into interlock standby mode.

[0126] After the common standby circulating water pump pipeline is filled with water and the system is connected, the common standby circulating water pump will be put into interlock standby mode. When circulating water pump 2 of Unit 1 or circulating water pump 4 of Unit 2 fails and trips or has insufficient output, the common standby circulating water pump 3 can be automatically started to ensure the normal operation of the circulating water system of Unit 1 and / or the circulating water system of Unit 2.

[0127] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the operation of each valve in the circulating water system of the intercooled unit, the first unit circulating water pump and the second unit circulating water pump, so that the common standby circulating water pump enters the interlock standby state.

[0128] Step S103: When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlock standby state is started; wherein, the failure includes insufficient output and tripping.

[0129] It is understood that the following embodiments specifically illustrate how to determine whether the circulating water pump of the first unit or the circulating water pump of the second unit has failed by detecting operating parameters and the status of each valve.

[0130] Figure 4 This is a specific embodiment of the automatic control method for circulating water pumps implemented in this application.

[0131] In one embodiment, see Figure 4 The step of starting the common standby circulating water pump, which is in interlocked standby mode, when it is determined by detecting the operating parameters and the status of each valve that the first unit circulating water pump or the second unit circulating water pump has failed, includes:

[0132] S401: By detecting the operating parameters of the first unit's circulating water pump, such as the current and outlet circulating water pressure, and whether the corresponding outlet and inlet gates are all fully open, it is determined whether the first unit's circulating water pump is in a tripped state.

[0133] S402: By detecting the operating parameters of the second unit's circulating water pump, such as the current and outlet circulating water pressure, and whether the corresponding outlet and inlet valves are all fully open, it is determined whether the second unit's circulating water pump is in a tripped state.

[0134] S403: By detecting whether the outlet and inlet gates of the first unit circulating water pump are both fully open, and by detecting whether the circulating water pressure of the outlet main pipe of the first unit circulating water pump is less than a preset threshold after the first unit circulating water pump has been running for a preset time period, it is determined whether the first unit circulating water pump has a power shortage fault.

[0135] S404: By detecting whether the outlet and inlet valves of the second unit circulating water pump are both fully open, and by detecting that the circulating water pressure of the outlet main pipe of the second unit circulating water pump is less than a preset threshold after the second unit circulating water pump has been running for a preset time period, it is determined whether the second unit circulating water pump has a power shortage fault.

[0136] S405: If it is determined that the first unit circulating water pump is in a tripped state, the second unit circulating water pump is in a tripped state, the first unit circulating water pump has a power output failure, or the second unit circulating water pump has a power output failure, control the operation of the common standby circulating water pump to realize the interlocked start of the common standby circulating water pump.

[0137] It is understandable that the interlocking start conditions for the public backup circulating water pump include: (these conditions are related by "OR", meaning that if any one condition is met, the public backup circulating water pump 3 will start.)

[0138] 1) Standby activation: The inlet and outlet valves of Unit 1 and the standby pump are both fully open, and the circulating water pump of Unit 1 trips.

[0139] 2) Standby activation: The inlet and outlet valves of Unit 2 and the standby pump are both fully open, and the circulating water pump of Unit 2 trips.

[0140] 3) Standby activation: The inlet and outlet valves of Unit 1 and the standby pump are both fully open. After the circulating water pump of Unit 1 has been running for 30 seconds, the circulating water pressure p1 < h at the outlet header of the circulating water pump of Unit 1.

[0141] 4) Standby activation: With both the inlet and outlet gates of Unit 2 and the standby pump fully open, after the circulating water pump of Unit 2 has been running for 30 seconds, the circulating water pressure p2 < h at the outlet header of the circulating water pump of Unit 2.

[0142] The value of the setpoint h is determined based on the actual operating conditions of the unit. For example, in one embodiment, h is set to 0.38 MPa. The logical relationship between the above four conditions is an "OR" relationship, meaning that when any one of the above four conditions is met, the controller 1 sends an interlock start signal to the common standby circulating water pump 3.

[0143] As can be seen from the above description, the automatic control method for circulating water pumps provided in this application can determine whether the first unit circulating water pump or the second unit circulating water pump has failed by detecting the operating parameters and the status of each valve, and start the common standby circulating water pump that is in an interlocked standby state when the failure occurs.

[0144] In one embodiment, the automatic control method for the circulating water pump further includes: controlling the first unit circulating water pump to trip when any preset tripping condition of the first unit circulating water pump is met; wherein the tripping condition of the first unit circulating water pump includes: the motor stator coil temperature of the first unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0145] It is understandable that the tripping conditions for the circulating water pump of Unit 1 include: (these conditions are related by "OR", meaning that when any one condition is met, the circulating water pump 2 of Unit 1 will perform a protection tripping action.)

[0146] 1) Temperature t of the stator coil of the circulating water pump motor of Unit 1 a1 >e;

[0147] 2) Temperature t of the bearing of the circulating water pump motor of Unit 1 a2 >f;

[0148] 3) Temperature t of the circulating water pump bearing of Unit 1 a3 >g;

[0149] 4) The circulating water pump of Unit 1 is in operation with the inlet valve fully closed and not open;

[0150] 5) After a 10-second delay, the outlet gate of Unit 1's circulating water pump is fully closed and not open.

[0151] The values ​​of e to g are provided by the equipment manufacturer based on the type of water pump and motor and the actual operating conditions. Generally, e > a, f > b, and g > c. For example, in a certain embodiment, a is 130°C, b is 90°C, and c is 90°C. The logical relationship between the above five conditions is "OR", that is, when any one of the above five conditions is met, the controller 1 sends a trip stop signal to the circulating water pump 2 of Unit 1.

[0152] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the first unit circulating water pump to trip when any preset tripping condition of the first unit circulating water pump is met.

[0153] In one embodiment, the automatic control method for the circulating water pump further includes: controlling the second unit circulating water pump to trip when any preset tripping condition of the second unit circulating water pump is met; wherein the tripping condition of the second unit circulating water pump includes: the motor stator coil temperature of the second unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0154] It is understandable that the tripping conditions for the circulating water pump protection of Unit 2 include: (these conditions are related by "OR", meaning that when any one condition is met, the circulating water pump 4 of Unit 2 will perform the protection tripping action.)

[0155] 1) Temperature t of the stator coil of the circulating water pump motor of Unit 2 b1 >e;

[0156] 2) Temperature t of the bearing of the circulating water pump motor of Unit 2 b2 >f;

[0157] 3) Temperature t of the circulating water pump bearing of Unit 2 b3 >g;

[0158] 4) The circulating water pump of Unit 2 is in operation with the inlet valve fully closed and not open;

[0159] 5) After a 10-second delay, the outlet gate of Unit 2's circulating water pump is fully closed and not open.

[0160] The values ​​of e to g are provided by the equipment manufacturer based on the type of water pump and motor and the actual operating conditions. Generally, e > a, f > b, and g > c. For example, in a certain embodiment, a is 130°C, b is 90°C, and c is 90°C. The logical relationship between the above five conditions is "OR", that is, when any one of the above five conditions is met, the controller 1 sends a trip stop signal to the circulating water pump 4 of Unit 2.

[0161] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the second unit circulating water pump to trip when any preset tripping condition of the second unit circulating water pump is met.

[0162] In one embodiment, the automatic control method for the circulating water pump further includes: controlling the common standby circulating water pump to trip when any preset tripping condition of the common standby circulating water pump is met; wherein the tripping condition of the common standby circulating water pump includes: the temperature of the standby component exceeds a threshold; the outlet valve is fully closed and not open; in the operating state, the inlet connecting valve between the first unit circulating water pump and the common standby circulating water pump and the inlet connecting valve between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open; in the operating state, the outlet connecting valve between the first unit circulating water pump and the common standby circulating water pump and the outlet connecting valve between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open.

[0163] It is understandable that the protection trip conditions for the public backup circulating water pump include: (these conditions are related by "OR", meaning that when any one condition is met, the public backup circulating water pump 3 will perform a protection trip action.)

[0164] 1) Temperature t of the stator coil of the public standby circulating water pump motor c1 >e;

[0165] 2) Temperature t of the motor bearing of the public standby circulating water pump c2 >f;

[0166] 3) Public standby circulating water pump bearing temperature t c3 >g;

[0167] 4) The public standby circulating water pump is in operation, and the inlet gate is fully closed and not open;

[0168] 5) After a 10-second delay, the outlet gate remains fully closed and not open after the public backup circulating water pump has been running.

[0169] 6) The public standby circulating water pump is in operation, the inlet connecting valve between Unit 1 and the standby pump is fully closed and not open, and the inlet connecting valve between Unit 2 and the standby pump is fully closed and not open.

[0170] 7) The public standby circulating water pump is in operation, the outlet connection valve between Unit 1 and the standby pump is fully closed and not open, and the outlet connection valve between Unit 2 and the standby pump is fully closed and not open.

[0171] The values ​​of e to g are provided by the equipment manufacturer based on the type of water pump and motor and the actual operating conditions. Generally, e > a, f > b, and g > c. For example, in a certain embodiment, a is 130°C, b is 90°C, and c is 90°C. The above seven conditions have an "OR" logical relationship, meaning that when any one of the above seven conditions is met, the controller 1 sends a trip stop signal to the common standby circulating water pump 3.

[0172] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the common standby circulating water pump to trip when any preset tripping condition of the common standby circulating water pump is met.

[0173] In one embodiment, the automatic control method for the circulating water pump further includes: setting the first unit circulating water pump to have start-up conditions when all preset start-up conditions for the first unit circulating water pump are met; wherein, the start-up conditions for the first unit circulating water pump include: the temperature of the motor stator coil of the first unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0174] It is understandable that the start-up conditions for Unit 1's circulating water pump include: (These conditions are mutually exclusive, meaning that all conditions must be met simultaneously for Unit 1's circulating water pump 2 to start.)

[0175] 1) Temperature t of the stator coil of the circulating water pump motor of Unit 1 a1 <a;

[0176] 2) Temperature t of the bearing of the circulating water pump motor of Unit 1 a2 <b;

[0177] 3) Temperature t of the circulating water pump bearing of Unit 1 a3 <c;

[0178] 4) The inlet valve of the circulating water pump of Unit 1 is fully open;

[0179] 5) The outlet valve of the circulating water pump of Unit 1 is fully closed;

[0180] 6) The liquid level H1 in the expansion tank of the intercooling tower of Unit 1 is greater than d.

[0181] The values ​​of a to d are provided by the equipment manufacturer based on the type of water pump and motor and the actual operating conditions. For example, in one embodiment, a is 110°C, b is 80°C, c is 80°C, and d is 0.8m. The logical relationship between the above six conditions is an "AND" relationship, meaning that the circulating water pump of Unit 1 is only ready to start when all six conditions are met. If any one condition is not met, the circulating water pump of Unit 1 will be restricted by controller 1 and will not be able to start.

[0182] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the first unit circulating water pump to start when all the preset start-up conditions for the first unit circulating water pump are met.

[0183] In one embodiment, the automatic control method for the circulating water pump further includes: setting the second unit circulating water pump to have start-up conditions when all preset start-up conditions for the second unit circulating water pump are met; wherein, the start-up conditions for the second unit circulating water pump include: the stator coil temperature of the motor of the second unit circulating water pump does not exceed a threshold; the motor bearing temperature does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0184] It is understandable that the start-up conditions for the circulating water pump of Unit 2 include: (these conditions are related by "AND", meaning that all conditions must be met simultaneously for the circulating water pump 4 of Unit 2 to start.)

[0185] 1) Temperature t of the stator coil of the circulating water pump motor of Unit 2 b1 <a;

[0186] 2) Temperature t of the bearing of the circulating water pump motor of Unit 2 b2 <b;

[0187] 3) Temperature t of the circulating water pump bearing of Unit 2 b3 <c;

[0188] 4) The inlet valve of the circulating water pump of Unit 2 is fully open;

[0189] 5) The outlet valve of the circulating water pump of Unit 2 is fully closed;

[0190] 6) The liquid level H2 in the expansion tank of the intercooling tower of Unit 2 is greater than d.

[0191] The values ​​of a to d are provided by the equipment manufacturer based on the type of water pump and motor and the actual operating conditions. For example, in one embodiment, a is 110°C, b is 80°C, c is 80°C, and d is 0.8m. The above six conditions are logically related by "AND", meaning that the No. 2 unit circulating water pump is ready to start only when all six conditions are met. If any one condition is not met, the No. 2 unit circulating water pump will be restricted by controller 1 and will not be able to start.

[0192] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the second unit circulating water pump to start when all the preset start-up conditions for the second unit circulating water pump are met.

[0193] In one embodiment, the automatic control method for the circulating water pump further includes: setting the common standby circulating water pump to meet the start-up conditions when all preset start-up conditions for the common standby circulating water pump are met; wherein the start-up conditions for the common standby circulating water pump include:

[0194] The temperature of the spare components does not exceed the threshold.

[0195] The inlet gate of the public backup circulating water pump, the outlet connecting gate between the first unit circulating water pump and the public backup circulating water pump, the inlet gate of the public backup circulating water pump, and the inlet connecting gate between the second unit circulating water pump and the public backup circulating water pump are all in a first preset state; and

[0196] The outlet valve of the public backup circulating water pump, the outlet connecting valve between the first unit circulating water pump and the public backup circulating water pump, the outlet valve of the public backup circulating water pump, and the outlet connecting valve between the second unit circulating water pump and the public backup circulating water pump are all in a second preset state; and

[0197] The communication valve between the first unit circulating water pump and the common standby circulating water pump, the communication valve between the second unit circulating water pump and the common standby circulating water pump, the liquid level of the expansion tank of the intercooling tower of the first unit circulating water pump, and the liquid level of the expansion tank of the intercooling tower of the second unit circulating water pump are all in a third preset state.

[0198] It is understandable that the conditions for starting the public backup circulating water pump include: (these conditions are related by "AND", meaning that all conditions must be met simultaneously for the public backup circulating water pump 3 to start.)

[0199] 1) Temperature t of the stator coil of the public standby circulating water pump motor c1 <a;

[0200] 2) Temperature t of the motor bearing of the public standby circulating water pumpc2 <b;

[0201] 3) Public standby circulating water pump bearing temperature t c3 <c;

[0202] 4) The inlet valve of the public standby circulating water pump is fully open, and the inlet connecting valve between Unit 1 and the standby pump is fully open; or the inlet valve of the public standby circulating water pump is fully open, and the inlet connecting valve between Unit 2 and the standby pump is fully open.

[0203] 5) The outlet valve of the public standby circulating water pump is fully closed, and the outlet connection valve between Unit 1 and the standby pump is fully open; or the outlet valve of the public standby circulating water pump is fully closed, and the outlet connection valve between Unit 2 and the standby pump is fully open.

[0204] 6) The inlet and outlet connecting valves of Unit 1 and the standby pump are fully open, and the inlet and outlet connecting valves of Unit 2 and the standby pump are fully closed, and the liquid level H1 in the expansion tank of the intercooling tower of Unit 1 is greater than d; or the inlet and outlet connecting valves of Unit 2 and the standby pump are fully open, and the inlet and outlet connecting valves of Unit 1 and the standby pump are fully closed, and the liquid level H2 in the expansion tank of the intercooling tower of Unit 2 is greater than d; or the inlet and outlet connecting valves of Unit 1 and the standby pump are fully open, and the inlet and outlet connecting valves of Unit 2 and the standby pump are fully open, and the liquid level H1 in the expansion tank of the intercooling tower of Unit 1 is greater than d or the liquid level H2 in the expansion tank of the intercooling tower of Unit 2 is greater than d.

[0205] The values ​​of a to d are provided by the equipment manufacturer based on the type of water pump and motor and the actual operating conditions. For example, in one embodiment, a is 110°C, b is 80°C, c is 80°C, and d is 0.8m. The logical relationship between the above six conditions is an "AND" relationship, meaning that the common standby circulating water pump is ready to start only when all six conditions are met. If any one condition is not met, the common standby circulating water pump will be restricted by controller 1 and will not be able to start.

[0206] As can be seen from the above description, the automatic control method for the circulating water pump provided in this application can control the common standby circulating water pump to start when all the preset start-up conditions for the common standby circulating water pump are met.

[0207] Based on the same inventive concept, this application also provides an automatic control device for a circulating water pump, which can be used to implement the method described in the above embodiments, as shown in the following embodiments. Since the principle of the automatic control device for the circulating water pump is similar to that of the automatic control method for the circulating water pump, the implementation of the automatic control device for the circulating water pump can refer to the implementation of the method based on software performance benchmarks, and will not be repeated. As used below, the terms "unit" or "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0208] In one embodiment, see Figure 5 In order to control the circulating water system with two units and three pumps under different operating conditions to complete the interlocking start and trip protection of the circulating water pumps, and to enable one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of two units at the same time, thereby effectively ensuring the safe and stable operation of the unit's circulating water system, this application provides an automatic control device for circulating water pumps, including: an operating parameter acquisition unit 501, an interlocking backup control unit 502, and a common backup water pump interlocking start unit 503.

[0209] The operating parameter acquisition unit 501 is used to acquire the operating parameters of each circulating water pump in the circulating water system of the intercooled unit; wherein, the circulating water pump includes a first unit circulating water pump, a second unit circulating water pump and a common standby circulating water pump;

[0210] The interlocking standby control unit 502 is used to control the operation of each valve in the intercooled unit circulating water system, the first unit circulating water pump and the second unit circulating water pump, so that the common standby circulating water pump enters the interlocking standby state.

[0211] The common standby water pump interlocking start unit 503 is used to start the common standby circulating water pump in the interlocking standby state when it is determined by detecting the operating parameters and the status of each valve that the first unit circulating water pump or the second unit circulating water pump has failed; wherein, the failure includes insufficient output and tripping.

[0212] In one embodiment, see Figure 6 The automatic control device for the circulating water pump, wherein the second unit circulating water pump is in a non-operating state; the valve includes a connecting valve between the first unit circulating water pump and the common standby circulating water pump; the interlocking standby control unit 502 includes:

[0213] The first water pump filling module 601 is used to fill the first unit's circulating water pump with water;

[0214] The first unit circulation module 602 is used to start the first unit circulation pump to realize the circulation of the first unit water system when it is detected that the first unit circulation pump has completed filling.

[0215] The first common circulation water injection module 603 is used to open the connection valve between the first unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the first unit circulation water pump is injected into the pipe of the common standby circulation water pump, and the common standby circulation water pump enters the interlock standby state.

[0216] In one embodiment, see Figure 7 The second unit's circulating water pump is in operation; the valves include a connecting valve between the first unit's circulating water pump and the common standby circulating water pump, and a connecting valve between the second unit's circulating water pump and the common standby circulating water pump; the interlocking standby control unit 502 includes:

[0217] The first water pump filling module 601 is used to fill the first unit's circulating water pump with water;

[0218] The first unit circulation module 602 is used to start the first unit circulation pump to realize the circulation of the first unit water system when it is detected that the first unit circulation pump has completed filling.

[0219] The first common circulation water injection module 603 is used to open the connection valve between the first unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the first unit circulation water pump is injected into the pipe of the common standby circulation water pump.

[0220] The pressure balance adjustment module 704 is used to adjust the speed of the second unit's circulating water pump so that the outlet circulating water pressure of the first unit's circulating water pump and the outlet circulating water pressure of the second unit's circulating water pump reach a balance.

[0221] The second common circulation water injection module 705 is used to open the connection valve between the second unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the second unit circulation water pump is injected into the pipe of the common standby circulation water pump, and the common standby circulation water pump enters the interlock standby state.

[0222] In one embodiment, see Figure 8 The public backup water pump interlocking start unit 503 includes:

[0223] The first water pump trip judgment module 801 is used to determine whether the first unit circulating water pump is in a trip state by detecting the operating parameters of the first unit circulating water pump and whether the corresponding outlet gate and inlet gate are both in a fully open state.

[0224] The second water pump trip judgment module 802 is used to detect the operating parameters of the second unit circulating water pump and whether the corresponding outlet gate and inlet gate are fully open, and to determine whether the second unit circulating water pump is in a trip state.

[0225] The first pump output judgment module 803 is used to determine whether the first unit circulating water pump has a power shortage fault by detecting whether the outlet gate and inlet gate of the first unit circulating water pump are both fully open, and whether the circulating water pressure of the outlet main pipe of the first unit circulating water pump is less than a preset threshold after the first unit circulating water pump has been running for a preset time period.

[0226] The second pump output judgment module 804 is used to determine whether the second unit circulating water pump has a power shortage fault by detecting whether the outlet gate and inlet gate of the second unit circulating water pump are both fully open, and by detecting that the circulating water pressure of the outlet main pipe of the second unit circulating water pump is less than a preset threshold after the second unit circulating water pump has been running for a preset time period.

[0227] The public standby water pump interlocking start module 805 is used to control the operation of the public standby circulating water pump if it is determined that the first unit circulating water pump is in a tripped state, the second unit circulating water pump is in a tripped state, the first unit circulating water pump has a power shortage fault, or the second unit circulating water pump has a power shortage fault, thereby realizing the interlocking start of the public standby circulating water pump.

[0228] In one embodiment, the automatic control device for the circulating water pump further includes: a first water pump tripping unit, used to control the first unit circulating water pump to trip when any preset first unit circulating water pump tripping condition is met; wherein, the first unit circulating water pump tripping condition includes: the motor stator coil temperature of the first unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0229] In one embodiment, the automatic control device for the circulating water pump further includes: a second water pump tripping unit, used to control the second unit circulating water pump to trip when any preset second unit circulating water pump tripping condition is met; wherein, the second unit circulating water pump tripping condition includes: the motor stator coil temperature of the second unit circulating water pump exceeds a threshold, the motor bearing temperature exceeds a threshold, the bearing temperature exceeds a threshold, and the outlet gate is fully closed and not opened after a preset running time.

[0230] In one embodiment, the automatic control device for the circulating water pump further includes: a standby water pump tripping unit, used to control the common standby circulating water pump to trip when any preset common standby circulating water pump tripping condition is met; wherein, the common standby circulating water pump tripping condition includes: the standby component temperature exceeding a threshold; the outlet valve being fully closed and not open; in the operating state, the inlet connecting valves between the first unit circulating water pump and the common standby circulating water pump, and the inlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open; in the operating state, the outlet connecting valves between the first unit circulating water pump and the common standby circulating water pump, and the outlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open.

[0231] In one embodiment, the automatic control device for the circulating water pump further includes: a first water pump starting unit, used to set the first unit circulating water pump to have the starting conditions when all preset starting conditions for the first unit circulating water pump are met; wherein, the starting conditions for the first unit circulating water pump include: the temperature of the motor stator coil of the first unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0232] In one embodiment, the automatic control device for the circulating water pump further includes: a second water pump starting unit, used to set the second unit circulating water pump to have the starting conditions when all preset starting conditions for the second unit circulating water pump are met; wherein, the starting conditions for the second unit circulating water pump include: the temperature of the motor stator coil of the second unit circulating water pump does not exceed a threshold; the temperature of the motor bearing does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

[0233] In one embodiment, the automatic control device for the circulating water pump further includes: a standby water pump starting unit, configured to set the common standby circulating water pump to meet the starting conditions when all preset common standby circulating water pump starting conditions are met; wherein, the common standby circulating water pump starting conditions include:

[0234] The temperature of the spare components does not exceed the threshold.

[0235] The inlet gate of the public backup circulating water pump, the outlet connecting gate between the first unit circulating water pump and the public backup circulating water pump, the inlet gate of the public backup circulating water pump, and the inlet connecting gate between the second unit circulating water pump and the public backup circulating water pump are all in a first preset state; and

[0236] The outlet valve of the public backup circulating water pump, the outlet connecting valve between the first unit circulating water pump and the public backup circulating water pump, the outlet valve of the public backup circulating water pump, and the outlet connecting valve between the second unit circulating water pump and the public backup circulating water pump are all in a second preset state; and

[0237] The communication valve between the first unit circulating water pump and the common standby circulating water pump, the communication valve between the second unit circulating water pump and the common standby circulating water pump, the liquid level of the expansion tank of the intercooling tower of the first unit circulating water pump, and the liquid level of the expansion tank of the intercooling tower of the second unit circulating water pump are all in a third preset state.

[0238] From a hardware perspective, in order to control the interlocked start-up and trip protection of the circulating water pumps in a two-unit, three-pump configuration circulating water system under different operating conditions, and to enable one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of both units simultaneously, thereby effectively ensuring the safe and stable operation of the unit's circulating water system, this application provides an embodiment of an electronic device for implementing all or part of the automatic control method for the circulating water pumps. The electronic device specifically includes the following:

[0239] The system comprises a processor, a memory, a communications interface, and a bus; wherein the processor, memory, and communications interface communicate with each other via the bus; the communications interface is used to realize information transmission between the automatic control device of the circulating water pump and core business systems, user terminals, and related databases and other related devices; the logic controller can be a desktop computer, tablet computer, or mobile terminal, etc., and this embodiment is not limited to these. In this embodiment, the logic controller can be implemented with reference to the embodiments of the automatic control method and the automatic control device of the circulating water pump in the embodiments, the contents of which are incorporated herein, and repeated details will not be described again.

[0240] It is understood that the user terminal may include smartphones, tablet computers, network set-top boxes, portable computers, desktop computers, personal digital assistants (PDAs), in-vehicle devices, smart wearable devices, etc. Among these, the smart wearable devices may include smart glasses, smartwatches, smart bracelets, etc.

[0241] In practical applications, the automatic control method for the circulating water pump can be partially executed on the electronic device side as described above, or all operations can be completed in the client device. The choice can be made based on the processing power of the client device and the limitations of the user's usage scenario. This application does not impose any limitations on this. If all operations are completed in the client device, the client device may further include a processor.

[0242] The aforementioned client device may have a communication module (i.e., a communication unit) that can communicate with a remote server to achieve data transmission. The server may include a server on the task scheduling center side; in other implementation scenarios, it may also include a server on an intermediate platform, such as a server on a third-party server platform that has a communication link with the task scheduling center server. The server may include a single computer device, a server cluster consisting of multiple servers, or a distributed server structure.

[0243] Figure 11 This is a schematic block diagram illustrating the system configuration of the electronic device 9600 according to an embodiment of this application. Figure 11 As shown, the electronic device 9600 may include a central processing unit 9100 and a memory 9140; the memory 9140 is coupled to the central processing unit 9100. It is worth noting that... Figure 11 This is an example; other types of structures can also be used to supplement or replace this structure to achieve telecommunications functions or other functions.

[0244] In one embodiment, the automatic control method for the circulating water pump can be integrated into the central processing unit 9100. The central processing unit 9100 can be configured to perform the following control:

[0245] S101: Obtain the operating parameters of each circulating water pump in the circulating water system of the indirect-cooled unit; wherein, the circulating water pump includes the first unit circulating water pump, the second unit circulating water pump and the common standby circulating water pump;

[0246] S102: Control the operation of each valve in the circulating water system of the intercooled unit, the circulating water pump of the first unit and the circulating water pump of the second unit, so that the common standby circulating water pump enters the interlock standby state;

[0247] S103: When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlock standby state is started; wherein, the failure includes insufficient output and tripping.

[0248] As described above, the automatic control method for circulating water pumps provided in this application can control the interlocking start-up and trip protection of the circulating water pumps in a two-unit, three-pump configuration circulating water system under different operating conditions. This allows one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of both units simultaneously, effectively ensuring the safe and stable operation of the unit's circulating water system. When equipment malfunctions, the common standby circulating water pump can quickly execute the interlocking start command, preventing generator unit shutdowns due to circulating water system outages. The automatic control method and device for circulating water pumps provided in this application can achieve fully automated control of the circulating water system commissioning process, reducing tedious operating procedures for operators, avoiding errors that may occur due to manual operation, and achieving precise judgment and control during commissioning.

[0249] In another embodiment, the automatic control device of the circulating water pump can be configured separately from the central processing unit 9100. For example, the automatic control device of the circulating water pump can be configured as a chip connected to the central processing unit 9100, and the function of the automatic control method of the circulating water pump can be realized through the control of the central processing unit.

[0250] like Figure 11 As shown, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is worth noting that the electronic device 9600 does not necessarily need to include these components. Figure 11 All components shown; in addition, the electronic device 9600 may also include Figure 11 For components not shown, please refer to existing technologies.

[0251] like Figure 11 As shown, the central processing unit 9100, sometimes also referred to as a controller or operating control, may include a microprocessor or other processor device and / or logic device, which receives inputs and controls the operation of various components of the electronic device 9600.

[0252] The memory 9140 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned failure-related information, and also store a program for executing that information. The central processing unit 9100 may execute the program stored in the memory 9140 to perform information storage or processing, etc.

[0253] Input unit 9120 provides input to central processing unit 9100. Input unit 9120 may be, for example, a keypad or touch input device. Power supply 9170 provides power to electronic device 9600. Display 9160 displays images and text. Display may be, for example, an LCD display, but is not limited thereto.

[0254] The memory 9140 can be a solid-state memory, such as a read-only memory (ROM), random access memory (RAM), a SIM card, etc. It can also be a memory that retains information even when power is off, can be selectively erased, and contains more data; examples of this type of memory are sometimes referred to as EPROMs. The memory 9140 can also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application / function storage unit 9142 for storing application programs and function programs or processes for executing the operation of the electronic device 9600 via the central processing unit 9100.

[0255] The memory 9140 may also include a data storage unit 9143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 may include various drivers for the electronic device's communication functions and / or for performing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0256] The communication module 9110 is a transmitter / receiver 9110 that transmits and receives signals via the antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processing unit 9100 to provide input signals and receive output signals, which can be the same as in a conventional mobile communication terminal.

[0257] Based on different communication technologies, multiple communication modules 9110 can be configured in the same electronic device, such as cellular network modules, Bluetooth modules, and / or wireless LAN modules. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132, thereby realizing typical telecommunications functions. The audio processor 9130 may include any suitable buffer, decoder, amplifier, etc. Additionally, the audio processor 9130 is also coupled to a central processing unit 9100, enabling on-device recording via the microphone 9132 and on-device playback of stored sound via the speaker 9131.

[0258] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the automatic control method for a circulating water pump with a server or client as the execution subject in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the automatic control method for a circulating water pump with a server or client as the execution subject in the above embodiments. For example, when the processor executes the computer program, it implements the following steps:

[0259] S101: Obtain the operating parameters of each circulating water pump in the circulating water system of the indirect-cooled unit; wherein, the circulating water pump includes the first unit circulating water pump, the second unit circulating water pump and the common standby circulating water pump;

[0260] S102: Control the operation of each valve in the circulating water system of the intercooled unit, the circulating water pump of the first unit and the circulating water pump of the second unit, so that the common standby circulating water pump enters the interlock standby state;

[0261] S103: When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlock standby state is started; wherein, the failure includes insufficient output and tripping.

[0262] As described above, the automatic control method for circulating water pumps provided in this application can control the interlocking start-up and trip protection of the circulating water pumps in a two-unit, three-pump configuration circulating water system under different operating conditions. This allows one standby circulating water pump to provide reliable and effective backup for the circulating water pumps of both units simultaneously, effectively ensuring the safe and stable operation of the unit's circulating water system. When equipment malfunctions, the common standby circulating water pump can quickly execute the interlocking start command, preventing generator unit shutdowns due to circulating water system outages. The automatic control method and device for circulating water pumps provided in this application can achieve fully automated control of the circulating water system commissioning process, reducing tedious operating procedures for operators, avoiding errors that may occur due to manual operation, and achieving precise judgment and control during commissioning.

[0263] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0264] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0265] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0266] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0267] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An automatic control method for a circulating water pump, characterized in that, include: Obtain the operating parameters of each circulating water pump in the circulating water system of the indirect-cooled unit; wherein, the circulating water pump includes the first unit circulating water pump, the second unit circulating water pump and the common standby circulating water pump; Control the operation of each valve in the circulating water system of the indirect cooling unit, the circulating water pump of the first unit and the circulating water pump of the second unit, so that the common standby circulating water pump enters the interlock standby state; When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlocked standby state is started; wherein, the failure includes insufficient output and tripping. Wherein, the second unit circulating water pump is in operation; the valves include a connecting valve between the first unit circulating water pump and the common standby circulating water pump, and a connecting valve between the second unit circulating water pump and the common standby circulating water pump; controlling the operation of each valve, the first unit circulating water pump, and the second unit circulating water pump in the intercooled unit circulating water system to cause the common standby circulating water pump to enter an interlocked standby state includes: The circulating water pump of the first unit is filled with water; When it is detected that the first unit's circulating water pump has completed filling, the first unit's circulating water pump is started to realize the circulation of the first unit's water system; Open the connecting valve between the first unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the first unit circulating water pump to be injected into the pipe of the common standby circulating water pump. Adjust the speed of the second unit's circulating water pump to balance the outlet circulating water pressure of the first unit's circulating water pump with the outlet circulating water pressure of the second unit's circulating water pump. Open the connecting valve between the second unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the second unit circulating water pump to enter the pipe of the common standby circulating water pump, and the common standby circulating water pump enters the interlocked standby state.

2. The automatic control method for a circulating water pump according to claim 1, characterized in that, The second unit's circulating water pump is in a non-operating state; the valves include a connecting valve between the first unit's circulating water pump and the common standby circulating water pump; controlling the operation of each valve in the intercooled unit's circulating water system, the first unit's circulating water pump, and the second unit's circulating water pump to put the common standby circulating water pump into an interlocked standby state includes: The circulating water pump of the first unit is filled with water; When it is detected that the first unit's circulating water pump has completed filling, the first unit's circulating water pump is started to realize the circulation of the first unit's water system; Open the connecting valve between the first unit circulating water pump and the common standby circulating water pump to allow circulating water from the inlet pipe of the first unit circulating water pump to enter the pipe of the common standby circulating water pump, and the common standby circulating water pump enters the interlocked standby state.

3. The automatic control method for a circulating water pump according to claim 1, characterized in that, When it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed, the common standby circulating water pump in the interlocked standby state is started, including: By detecting the operating parameters of the first unit's circulating water pump and whether the corresponding outlet and inlet valves are fully open, it can be determined whether the first unit's circulating water pump is in a tripped state. By detecting the operating parameters of the second unit's circulating water pump and whether the corresponding outlet and inlet valves are fully open, it can be determined whether the second unit's circulating water pump is in a tripped state. By detecting whether the outlet and inlet valves of the first unit's circulating water pump are both fully open, and by detecting whether the circulating water pressure in the outlet main pipe of the first unit's circulating water pump is less than a preset threshold after the first unit's circulating water pump has been running for a preset period of time, it can be determined whether the first unit's circulating water pump has experienced a power shortage fault. By detecting whether the outlet and inlet valves of the second unit's circulating water pump are both fully open, and by detecting that the circulating water pressure in the outlet header of the second unit's circulating water pump is less than a preset threshold after the second unit's circulating water pump has been running for a preset period of time, it is determined whether the second unit's circulating water pump has experienced a power shortage fault. If it is determined that the first unit circulating water pump is in a tripped state, the second unit circulating water pump is in a tripped state, the first unit circulating water pump has a power output failure, or the second unit circulating water pump has a power output failure, the common standby circulating water pump is controlled to operate, so as to realize the interlocked start of the common standby circulating water pump.

4. The automatic control method for a circulating water pump according to claim 1, characterized in that, Also includes: When any preset tripping condition of the first unit circulating water pump is met, the first unit circulating water pump is controlled to trip; wherein, the tripping condition of the first unit circulating water pump includes: the temperature of the motor stator coil of the first unit circulating water pump exceeds a threshold, the bearing temperature exceeds a threshold, or the outlet gate is fully closed and not opened after a preset running time.

5. The automatic control method for a circulating water pump according to claim 1, characterized in that, Also includes: When any preset tripping condition of the second unit circulating water pump is met, the second unit circulating water pump is controlled to trip; wherein, the tripping condition of the second unit circulating water pump includes: the motor stator coil temperature of the second unit circulating water pump exceeds a threshold, the bearing temperature exceeds a threshold, or the outlet gate is fully closed and not opened after a preset running time.

6. The automatic control method for a circulating water pump according to claim 1, characterized in that, Also includes: When any preset tripping condition of the public backup circulating water pump is met, the public backup circulating water pump is controlled to trip; wherein, the tripping conditions of the public backup circulating water pump include: the temperature of the backup component exceeds a threshold; the outlet valve is fully closed and not open; in the operating state, the inlet connecting valves between the first unit circulating water pump and the public backup circulating water pump, and the inlet connecting valves between the second unit circulating water pump and the public backup circulating water pump are all fully closed and not open; in the operating state, the outlet connecting valves between the first unit circulating water pump and the public backup circulating water pump, and the outlet connecting valves between the second unit circulating water pump and the public backup circulating water pump are all fully closed and not open.

7. The automatic control method for a circulating water pump according to claim 1, characterized in that, Also includes: When all the preset start-up conditions for the first unit circulating water pump are met, the first unit circulating water pump is set to have the start-up conditions; wherein, the start-up conditions for the first unit circulating water pump include: the temperature of the motor stator coil of the first unit circulating water pump does not exceed the threshold; the bearing temperature does not exceed the threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds the threshold.

8. The automatic control method for a circulating water pump according to claim 1, characterized in that, Also includes: When all the preset start-up conditions for the second unit circulating water pump are met, the second unit circulating water pump is set to be ready for start-up. The start-up conditions for the second unit circulating water pump include: the temperature of the motor stator coil of the second unit circulating water pump does not exceed the threshold; the bearing temperature does not exceed the threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds the threshold.

9. The automatic control method for a circulating water pump according to claim 1, characterized in that, Also includes: When all preset start-up conditions for the public backup circulating water pump are met, the public backup circulating water pump is set to be ready for start-up; wherein, the start-up conditions for the public backup circulating water pump include: The temperature of the spare components does not exceed the threshold. The inlet gate of the public backup circulating water pump, the outlet connecting gate between the first unit circulating water pump and the public backup circulating water pump, the inlet gate of the public backup circulating water pump, and the inlet connecting gate between the second unit circulating water pump and the public backup circulating water pump are all in a first preset state; and The outlet valve of the public backup circulating water pump, the outlet connecting valve between the first unit circulating water pump and the public backup circulating water pump, the outlet valve of the public backup circulating water pump, and the outlet connecting valve between the second unit circulating water pump and the public backup circulating water pump are all in a second preset state; and The communication valve between the first unit circulating water pump and the common standby circulating water pump, the communication valve between the second unit circulating water pump and the common standby circulating water pump, the liquid level of the expansion tank of the intercooling tower of the first unit circulating water pump, and the liquid level of the expansion tank of the intercooling tower of the second unit circulating water pump are all in a third preset state.

10. An automatic control device for a circulating water pump, characterized in that, include: The operating parameter acquisition unit is used to acquire the operating parameters of each circulating water pump in the circulating water system of the intercooled unit; wherein, the circulating water pump includes a first unit circulating water pump, a second unit circulating water pump and a common standby circulating water pump; The interlocking standby control unit is used to control the operation of each valve in the circulating water system of the intercooled unit, the first unit circulating water pump and the second unit circulating water pump, so that the common standby circulating water pump enters the interlocking standby state. A common standby water pump interlocking start unit is used to start the common standby circulating water pump in interlocking standby mode when it is determined by detecting the operating parameters and the status of each valve that the circulating water pump of the first unit or the circulating water pump of the second unit has failed; wherein, the failure includes insufficient output and tripping. The second unit's circulating water pump is in operation; the valves include a connecting valve between the first unit's circulating water pump and the common standby circulating water pump, and a connecting valve between the second unit's circulating water pump and the common standby circulating water pump; the interlocking standby control unit includes: The first water pump filling module is used to fill the first unit's circulating water pump with water; The first unit circulation module is used to start the first unit circulation pump to realize the circulation of the first unit water system when it is detected that the first unit circulation pump has completed filling. The first common circulation water injection module is used to open the connection valve between the first unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the first unit circulation water pump is injected into the pipe of the common standby circulation water pump. The pressure balance adjustment module is used to adjust the speed of the second unit's circulating water pump so that the outlet circulating water pressure of the first unit's circulating water pump and the outlet circulating water pressure of the second unit's circulating water pump reach a balance. The second common circulation water injection module is used to open the connection valve between the second unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the second unit circulation water pump is injected into the pipe of the common standby circulation water pump, and the common standby circulation water pump enters the interlock standby state.

11. The automatic control device for the circulating water pump according to claim 10, characterized in that, The second unit's circulating water pump is in a non-operating state; the valve includes a connecting valve between the first unit's circulating water pump and the common standby circulating water pump; The interlocking backup control unit includes: The first water pump filling module is used to fill the first unit's circulating water pump with water; The first unit circulation module is used to start the first unit circulation pump to realize the circulation of the first unit water system when it is detected that the first unit circulation pump has completed filling. The first common circulation water injection module is used to open the connection valve between the first unit circulation water pump and the common standby circulation water pump, so that the circulation water in the inlet pipe of the first unit circulation water pump is injected into the pipe of the common standby circulation water pump, and the common standby circulation water pump enters the interlock standby state.

12. The automatic control device for the circulating water pump according to claim 10, characterized in that, The public backup water pump interlock start unit includes: The first pump tripping judgment module is used to determine whether the first unit circulating water pump is in a tripping state by detecting the operating parameters of the first unit circulating water pump and whether the corresponding outlet gate and inlet gate are both in a fully open state. The second pump tripping judgment module is used to detect the operating parameters of the second unit's circulating water pump and whether the corresponding outlet and inlet gates are fully open, and to determine whether the second unit's circulating water pump is in a tripping state. The first pump output judgment module is used to determine whether the first unit circulating water pump has a power shortage fault by detecting whether the outlet gate and inlet gate of the first unit circulating water pump are both fully open, and whether the circulating water pressure of the outlet main pipe of the first unit circulating water pump is less than a preset threshold after the first unit circulating water pump has been running for a preset time period. The second pump output judgment module is used to determine whether the second unit circulating water pump has a power shortage fault by detecting whether the outlet and inlet gates of the second unit circulating water pump are both fully open, and by detecting that the circulating water pressure of the outlet main pipe of the second unit circulating water pump is less than a preset threshold after the second unit circulating water pump has been running for a preset time period. The common standby water pump interlocking start module is used to control the operation of the common standby circulating water pump to realize the interlocking start of the common standby circulating water pump if it is determined that the first unit circulating water pump is in a tripped state, the second unit circulating water pump is in a tripped state, the first unit circulating water pump has a power shortage fault, or the second unit circulating water pump has a power shortage fault.

13. The automatic control device for the circulating water pump according to claim 10, characterized in that, Also includes: The first water pump tripping unit is used to control the first unit circulating water pump to trip when any preset tripping condition of the first unit circulating water pump is met; wherein, the tripping condition of the first unit circulating water pump includes: the temperature of the motor stator coil of the first unit circulating water pump exceeds a threshold, the bearing temperature exceeds a threshold, or the outlet valve is fully closed and not opened after a preset running time.

14. The automatic control device for the circulating water pump according to claim 10, characterized in that, Also includes: The second pump trip unit is used to control the second unit circulating water pump to trip when any preset second unit circulating water pump trip condition is met; wherein the second unit circulating water pump trip condition includes: the motor stator coil temperature of the second unit circulating water pump exceeds a threshold, the bearing temperature exceeds a threshold, or the outlet valve is fully closed and not opened after a preset running time.

15. The automatic control device for the circulating water pump according to claim 10, characterized in that, Also includes: The standby water pump tripping unit is used to control the common standby circulating water pump to trip when any preset tripping condition of the common standby circulating water pump is met; wherein, the tripping condition of the common standby circulating water pump includes: the temperature of the standby component exceeds a threshold; the outlet valve is fully closed and not open; in the operating state, the inlet connecting valves between the first unit circulating water pump and the common standby circulating water pump and the inlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open; in the operating state, the outlet connecting valves between the first unit circulating water pump and the common standby circulating water pump and the outlet connecting valves between the second unit circulating water pump and the common standby circulating water pump are both fully closed and not open.

16. The automatic control device for the circulating water pump according to claim 10, characterized in that, Also includes: The first water pump starting unit is used to set the first unit circulating water pump to be ready for starting when all preset starting conditions for the first unit circulating water pump are met; wherein, the starting conditions for the first unit circulating water pump include: the temperature of the motor stator coil of the first unit circulating water pump does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

17. The automatic control device for a circulating water pump according to claim 10, characterized in that, Also includes: The second water pump starting unit is used to set the second unit circulating water pump to be ready for starting when all preset starting conditions for the second unit circulating water pump are met. The starting conditions for the second unit circulating water pump include: the temperature of the motor stator coil of the second unit circulating water pump does not exceed a threshold; the bearing temperature does not exceed a threshold; the inlet valve is fully open; the outlet valve is fully closed; and the liquid level in the expansion tank of the indirect cooling tower exceeds a threshold.

18. The automatic control device for the circulating water pump according to claim 10, characterized in that, Also includes: A standby water pump start-up unit is used to set the common standby circulating water pump to be ready for start-up when all preset start-up conditions for the common standby circulating water pump are met; wherein, the start-up conditions for the common standby circulating water pump include: The temperature of the spare components does not exceed the threshold. The inlet gate of the public backup circulating water pump, the outlet connecting gate between the first unit circulating water pump and the public backup circulating water pump, the inlet gate of the public backup circulating water pump, and the inlet connecting gate between the second unit circulating water pump and the public backup circulating water pump are all in a first preset state; and The outlet valve of the public backup circulating water pump, the outlet connecting valve between the first unit circulating water pump and the public backup circulating water pump, the outlet valve of the public backup circulating water pump, and the outlet connecting valve between the second unit circulating water pump and the public backup circulating water pump are all in a second preset state; and The communication valve between the first unit circulating water pump and the common standby circulating water pump, the communication valve between the second unit circulating water pump and the common standby circulating water pump, the liquid level of the expansion tank of the intercooling tower of the first unit circulating water pump, and the liquid level of the expansion tank of the intercooling tower of the second unit circulating water pump are all in a third preset state.

19. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the automatic control method for the circulating water pump according to any one of claims 1 to 9.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the automatic control method for the circulating water pump according to any one of claims 1 to 9.

21. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the automatic control method for the circulating water pump according to any one of claims 1 to 9.

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