Main transformer technology water supply system and water supply flow interruption alarm system and method thereof

Abstract

The invention discloses a main transformer technology water supply system and a water supply flow interruption alarm system and method thereof. The water supply system comprises a water supply water taking port, three groups of main transformer technology water supply units, an automatic water filtering unit, a four-way reversing electric valve, a main transformer technology water supply combined control cabinet and a pressure pump control cabinet, a three-unit-one-unit communication layout is adopted, double pumps and double filters are mutually standby, and water is supplied to a main transformer cooler through the four-way reversing electric valve; and performing logical operation by collecting signal data based on the system, judging whether an alarm condition is met or not, and outputting an alarm signal if the alarm condition is met. The problems of false alarm and missing alarm caused by backwashing and reversing switching of the water filter are eliminated, the alarm accuracy is improved, it can be guaranteed that the main transformer is not overheated, and the power supply reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of water supply interruption alarm technology, and in particular to a main transformer-based water supply system and its water supply interruption alarm system and method. Background Technology

[0002] As a key piece of equipment in the power system, the main transformer relies on a stable supply of cooling water for normal operation. If the cooling water flow is interrupted, the transformer oil temperature and winding temperature may rise rapidly, shortening the insulation life and even causing a tripping accident. Therefore, timely and accurate detection of water supply interruptions is a crucial link in ensuring the safe operation of the main transformer.

[0003] Existing alarm systems typically only install single-point flow switches or pressure switches on the cooling water main, judging by a single parameter (flow rate or pressure). When the instantaneous flow rate or pressure is lower than a fixed threshold, an alarm is triggered. However, existing technology is not accurate enough in judging water supply interruptions under complex operating conditions (such as backwashing of water filters, switching operation of four-way reversing valves, etc.), and is easily affected by parameter fluctuations during equipment operation, leading to false alarms or missed alarms. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a main transformer technology water supply system and its water supply interruption alarm system and method. By logically judging different operating states of the main transformer technology water supply (normal operation, interconnected water supply operation) and related operations (filter backwashing, four-way reversing electric valve switching), and combining this with monitoring parameters such as flow rate, pressure, and voltage, accurate alarms for main transformer technology water supply interruptions are achieved, improving the reliability of the water supply system and ensuring the safe operation of the main transformer equipment.

[0005] This invention provides a main transformer-based water supply system, the specific technical solution of which is as follows: It includes a water intake, three sets of main transformer technology water supply units, an automatic water filtration unit, a four-way reversing electric valve, a main transformer technology water supply joint control cabinet, and a booster pump control cabinet. The main transformer water supply unit includes a booster pump set and a main transformer cooler; The water intake is connected to the booster pump group of one of the main transformer technical water supply units via a pipeline. The booster pump group is connected to the automatic water filtration unit via a pipeline. The water outlet of the automatic water filtration unit is connected to the four-way reversing electric valve via a cooling water supply pipe. The four-way reversing electric valve is connected to the main transformer cooler. The cooling water supply pipe is connected to the pipelines of the adjacent unit's main transformer cooler and booster pump. The booster pump control cabinet is connected to the booster pump group for control. The main transformer technical water supply joint control cabinet is connected to each valve in the system for control.

[0006] Furthermore, the outlet of the main transformer cooler is connected to a drain pipe equipped with a main drain valve.

[0007] The present invention also discloses a water supply interruption alarm system, which is based on the above-mentioned main transformer technology water supply system and includes a data acquisition module, a logic judgment module and an alarm output module. The data acquisition module is installed on the main transformer technical water supply system and collects the flow and pressure of the main transformer technical water supply main pipe, the voltage of the main transformer low-pressure side, the backwash status signal of the water filter, the forward and reverse water supply signals of the four-way reversing electric valve, the control mode signal of the main transformer technical water supply joint control cabinet, and the control mode signal of the booster pump control cabinet. The logic judgment module and the data acquisition module perform logical operations based on the acquired signal data to determine whether the alarm conditions are met. If the alarm conditions are met, a signal is sent to the alarm output module. The alarm output module is connected to the logic judgment module. After receiving the signal from the logic judgment module, it outputs an alarm signal indicating that the main transformer's water supply is interrupted.

[0008] Furthermore, the logical operation includes operating condition logic judgment and alarm logic output; The operating condition logic judgment process is as follows: Based on the current operating conditions, retrieve the corresponding condition group and determine whether the conditions of the condition group are met. If they are met, monitor the main pipe flow rate Q and the main pipe pressure P in real time. Based on the current main pipe flow rate Q and main pipe pressure P, the system compares and judges with the corresponding flow rate setpoint and pressure setpoint. Based on the judgment result, a delay is initiated. If the delay time exceeds the set time, a preset alarm signal is output. The alarm logic output process is as follows: The monitoring logic will output an alarm signal indicating that the main transformer's water supply is interrupted if a preset alarm signal is detected.

[0009] Furthermore, the operating condition logic judgment includes the logic judgment of normal operating condition, the logic judgment of water supply connection condition, and the logic judgment of the operation of the four-way reversing valve.

[0010] Furthermore, in the logical judgment of the normal operating condition, the condition group includes a first condition and a second condition; The first condition is that the first booster pump is running, or the second booster pump is running, or the voltage on the low-voltage side of the main transformer is greater than a set value; The second condition is that no backwashing status signal of the water filter is detected, and no forward water supply signal or reverse water supply signal of the four-way reversing electric valve is detected.

[0011] Furthermore, in the logical judgment of the water supply status, the condition group includes a third condition and a second condition. The third condition is that the main transformer technical water supply joint control cabinet is out of operation and the control mode handle of the booster pump control cabinet is switched to the cut-off position, the adjacent unit connecting valve is fully open, the total pipe flow rate is greater than the connection operation judgment setting value, the total pipe pressure is greater than the connection operation judgment setting value, or the main transformer low-voltage side voltage is greater than the setting value.

[0012] Furthermore, in the logical judgment during the operation of the four-way directional valve, the condition group includes a first condition and a fourth condition: The fourth condition is that no positive or reverse water supply signal is detected from the four-way reversing electric valve.

[0013] This invention also discloses a water supply interruption alarm method, based on the aforementioned main transformer technology water supply system, the method comprising: S1: Real-time acquisition of backwash status signals of water filter, forward and reverse water supply signals of four-way reversing electric valve, control mode signals of main transformer technical water supply joint control cabinet and control mode signals of booster pump control cabinet; S2: Based on the collected signal, perform a logical judgment on whether the alarm conditions are met. If the alarm conditions are met, output an alarm signal. The logical judgment is as follows: Based on the current operating conditions, different condition judgments are performed to determine whether the set conditions are met. If they are met, the main pipe flow rate Q and main pipe pressure P are monitored in real time. Based on the current main pipe flow rate Q and main pipe pressure P, the system compares and judges with the corresponding flow rate setpoint and pressure setpoint. Based on the judgment result, a delay is initiated. If the delay time exceeds the set time, a preset alarm signal is output.

[0014] Furthermore, under normal operating conditions, the judgment of the first and second conditions is executed; under the interconnected water supply conditions, the judgment of the second and third conditions is executed; and when the four-way reversing valve is operated, the first and fourth conditions are executed. In the condition judgment of the corresponding working condition, if any condition is met, that is, the set condition is met; The first condition is that the first booster pump is running, or the second booster pump is running, or the voltage on the low-voltage side of the main transformer is greater than a set value; The second condition is that no backwashing status signal of the water filter is detected, and no forward water supply signal or reverse water supply signal of the four-way reversing electric valve is detected. The third condition is that the main transformer technical water supply joint control cabinet is out of operation and the control mode handle of the booster pump control cabinet is switched to the cut-off position, the adjacent unit connecting valve is fully open, the main pipe flow rate is greater than the connection operation judgment setting value, the main pipe pressure is greater than the connection operation judgment setting value, or the main transformer low-voltage side voltage is greater than the setting value. The fourth condition is that no positive or reverse water supply signal is detected from the four-way reversing electric valve.

[0015] The beneficial effects of this invention are as follows: This invention integrates a main transformer water supply system with a multi-condition interruption alarm design, incorporating water intake, pressurization, filtration, reversing, cooling, drainage, and operational status identification into a single system architecture. This solves the problems of false alarms and missed alarms inherent in traditional single-parameter alarms during conditions such as filter backwashing and four-way reversing. It achieves accurate identification of actual cooling water interruptions under any operating condition, ensuring the main transformer does not overheat, and significantly improving its lifespan and system reliability. The main transformer water supply system of this invention adopts a three-unit interconnected pipeline + dual-pump, dual-filter mutual backup design architecture, ensuring uninterrupted water supply even when any pump or filter is under maintenance, thus improving water supply redundancy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main transformer technology water supply system architecture of the present invention.

[0017] Figure 2 This is a schematic diagram of the method flow of the present invention.

[0018] Explanation of reference numerals in the attached diagram: 1-Water intake, 2-First booster pump, 3-Second booster pump, 4-First filter, 5-Second filter, 6-Four-way reversing electric valve, 7-Main transformer cooler. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention are clearly and completely described in the following description. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use, or the orientation or positional relationship in which those skilled in the art conventionally understand it during use. This is only for the convenience of describing the present invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0022] Example 1 Embodiment 1 of the present invention discloses a main transformer technology water supply system, such as Figure 1 As shown, it includes a water intake 1, three sets of main transformer technology water supply units, an automatic water filtration unit, a four-way reversing electric valve 6, a main transformer technology water supply joint control cabinet, and a booster pump control cabinet. The main transformer water supply unit includes a booster pump set and a main transformer cooler 7; The booster pump set includes a first booster pump 2 and a second booster pump 3. The water intake 1 is connected to the booster pump set of one of the main transformer technical water supply units via a pipeline. The booster pump set is connected to the automatic water filtration unit via a pipeline. The automatic water filtration unit includes a first water filter and a second water filter. Specifically, the first booster pump 2 and the second booster pump 3 are respectively connected to the first water filter and the second water filter via pipelines. The water outlet of the automatic water filtration unit is connected to the four-way reversing electric valve 6 via a cooling water supply pipe. The four-way reversing electric valve 6 is connected to the main transformer cooler 7 to deliver cooling water to the main transformer cooler 7 in the main transformer room. The cooling water supply pipe is connected to the pipelines of the adjacent unit's main transformer cooler 7 and the booster pump. A connecting solenoid valve is provided on the connected pipeline. The booster pump control cabinet is connected to the booster pump set for control. The main transformer technical water supply joint control cabinet is connected to each valve in the system for control.

[0023] Based on the above system architecture, the main water source is drawn from the main transformer technical water supply intake 1, pressurized by a booster pump, filtered by an automatic water filter, and then sent to the cooling water supply pipe. The two water pumps and water filters serve as primary backups for each other. The main transformer technical water supply system adopts a three-unit-one-unit water supply mode. The main transformer technical water supply unit of each three units is connected and equipped with two connecting electric valves (01DF63, 03DF63). The water flow is sent to the main transformer cooler 7 in the main transformer room through the four-way reversing electric valve 6 (01DF80). After passing through the main transformer cooler 7, it is discharged again through the main drain valve (01DF81).

[0024] Example 2 Embodiment 2 of the present invention discloses a water supply interruption alarm system, which is based on the main transformer technology water supply system described in Embodiment 1, and includes a data acquisition module, a logic judgment module and an alarm output module; The data acquisition module includes several sensors and detection devices, which are installed on the main transformer technical water supply system to collect the flow and pressure of the main transformer technical water supply main pipe, the voltage of the low-pressure side of the main transformer, the backwash status signal of the water filter, the forward and reverse water supply signals of the four-way reversing electric valve 6, the control mode signal of the main transformer technical water supply joint control cabinet, and the control mode signal of the booster pump control cabinet. The logic judgment module and the data acquisition module perform logical operations based on the acquired signal data to determine whether the alarm conditions are met. If the alarm conditions are met, a signal is sent to the alarm output module. In a preferred embodiment, the logical operation includes operating condition logic judgment and alarm logic output; The operating condition logic judgment process is as follows: Based on the current operating conditions, retrieve the corresponding condition group and determine whether the conditions of the condition group are met. If they are met, monitor the main pipe flow rate Q and the main pipe pressure P in real time. Based on the current main pipe flow rate Q and main pipe pressure P, the system compares and judges with the corresponding flow rate setpoint and pressure setpoint. Based on the judgment result, a delay is initiated. If the delay time exceeds the set time, a preset alarm signal is output. The operating condition logic judgment includes the logic judgment of normal operating condition, the logic judgment of water supply connection condition, and the logic judgment when the four-way reversing valve is operating.

[0025] Specifically, in the logical judgment of the normal operating condition, the condition group includes a first condition and a second condition; In the logical judgment of the water supply status, the condition group includes a third condition and a second condition. In the logical judgment during the operation of the four-way directional valve, the condition group includes a first condition and a fourth condition.

[0026] The first condition is that the main transformer technical water supply is in operation (either the first booster pump 2 or the second booster pump 3 is in operation) or the voltage on the low-voltage side of the main transformer (predicting cooling demand and used to start the main transformer technical water supply system) is greater than the set value. The second condition is that there is no backwashing of the water filter (no backwashing status signal is detected) and no switching operation of the four-way reversing valve (no forward water supply signal and reverse water supply signal are detected for the four-way reversing electric valve 6). The third condition is that the main transformer technical water supply joint control cabinet is out of operation (judged by switching the control mode handle to the "cut-off" position), the booster pump control cabinet control mode handle is switched to the cut-off position, the adjacent unit connecting valve is fully open, the total pipe flow is greater than the connection operation judgment setting value, the total pipe pressure is greater than the connection operation judgment setting value, or the main transformer low-voltage side voltage is greater than the setting value.

[0027] The fourth condition is that there is no four-way reversing valve switching operation (no forward water supply signal or reverse water supply signal is detected in the four-way reversing electric valve 6).

[0028] The alarm logic output process is as follows: The monitoring logic will output an alarm signal indicating that the main transformer's water supply is interrupted if a preset alarm signal is detected.

[0029] The alarm output module is connected to the logic judgment module. After receiving the signal from the logic judgment module, it outputs an alarm signal indicating that the main transformer water supply is interrupted through the PLC.

[0030] The interruption alarm setting value and each delay time can be dynamically adjusted according to design requirements, and no specific limitation is made here.

[0031] Example 3 Embodiment 3 of the present invention discloses a water supply interruption alarm method, based on the main transformer technology water supply system described in Embodiment 1, such as... Figure 2 As shown, the specific steps are as follows: S1: Real-time acquisition of backwash status signals of water filter, forward and reverse water supply signals of four-way reversing electric valve 6, control mode signals of main transformer technical water supply joint control cabinet and control mode signals of booster pump control cabinet; S2: Based on the collected signal, perform a logical judgment on whether the alarm conditions are met. If the alarm conditions are met, output an alarm signal. The logical judgment is as follows: Based on the current operating conditions, different condition judgments are performed to determine whether the set conditions are met. If they are met, the main pipe flow rate Q and main pipe pressure P are monitored in real time. Based on the current main pipe flow rate Q and main pipe pressure P, the system compares and judges with the corresponding flow rate setpoint and pressure setpoint. Based on the judgment result, a delay is initiated. If the delay time exceeds the set time, a preset alarm signal is output.

[0032] Specifically, the process for determining the interruption of water supply flow in the main transformer under normal operating conditions is as follows: When the first and second conditions are met, monitor the main pipe flow rate Q and main pipe pressure P in real time. First condition: The main transformer technical water supply is in operation (either the first booster pump 2 or the second booster pump 3 is in operation) or the main transformer low-voltage side voltage (predicted cooling demand, used to start the main transformer technical water supply system) > set value; Second condition: No backwashing of water filters (no backwashing status signal of the first and second water filters) and no switching operation of the four-way reversing valve (judged by collecting data on whether the four-way reversing electric valve 6 is in the forward water supply or reverse water supply state). If the main pipe flow rate Q < the interrupt alarm setting value and the main pipe pressure P < the interrupt alarm setting value, start the first delay timer T1; When T1 ≥ 30 seconds, the first main transformer will output a water supply interruption alarm signal.

[0033] The process for determining the alarm and judgment of water supply interruption in the main transformer's technical system for water supply status is as follows: When the third and second conditions are met, monitor the main pipe flow rate Q and main pipe pressure P in real time. The third condition is that the main transformer technical water supply joint control cabinet is out of operation (judged by switching the control mode handle to the "cut-off" position), the booster pump control cabinet control mode handle is switched to the cut-off position, the adjacent unit connecting valve is fully open, the total pipe flow is greater than the connection operation judgment setting value, the total pipe pressure is greater than the connection operation judgment setting value, or the main transformer low-voltage side voltage is greater than the setting value. The combined control cabinet and the booster pump control cabinet "cut off" signals to directly participate in the operation condition judgment, and convert the position of the hardware handle into a logical condition. No additional sensors are required, which simplifies wiring and reduces the number of failure points. If the third condition is met, start the second delay timer T2. When T2≥30 seconds, output the intermediate variable of the main transformer technical water supply system connection operation state. Second condition: No backwashing of water filters (no backwashing status signal of the first and second water filters) and no switching operation of the four-way reversing valve (judged by collecting data on whether the four-way reversing electric valve 6 is in the forward water supply or reverse water supply state). If the main pipe flow rate Q < the interrupt alarm setting value and the main pipe pressure P < the interrupt alarm setting value, start the third delay timer T3; When T3 ≥ 30 seconds, the second main transformer will output a water supply interruption alarm signal.

[0034] The process for determining the interruption of main transformer water supply during the operation of the four-way reversing valve is as follows: When the first and fourth conditions are met, monitor the main pipe flow rate Q and main pipe pressure P in real time. First condition: The main transformer technical water supply is in operation (either the first booster pump 2 or the second booster pump 3 is in operation) or the main transformer low-voltage side voltage (predicted cooling demand, used to start the main transformer technical water supply system) > set value; Fourth condition: No four-way reversing valve switching operation (collect data to determine whether the four-way reversing electric valve 6 is in the forward water supply or directional water supply state). If the fourth condition is met, start the fourth delay timer T4. When T4≥180 seconds, output the intermediate variable of the main transformer technical water supply system connection operation state. If the main pipe flow rate Q < the interrupt alarm setting value and the main pipe pressure P < the interrupt alarm setting value, start the fifth delay timer T5; When T5 ≥ 30 seconds, the third main transformer will output a water supply interruption alarm signal.

[0035] By automatically adapting to operational transients through graded delays (30 s for normal / communication, 180 s + 30 s for reversal), it avoids false alarms caused by instantaneous fluctuations and ensures that a real water outage will be reported within 30 s, thus improving alarm accuracy.

[0036] When any one of the following signals is input: the first main transformer technical water supply interruption alarm output signal, the second main transformer technical water supply interruption alarm output signal, or the third main transformer technical water supply interruption alarm output signal, the main transformer technical water supply interruption alarm signal will be output.

[0037] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A main transformer-based water supply system, characterized in that, It includes a water intake, three sets of main transformer technology water supply units, an automatic water filtration unit, a four-way reversing electric valve, a main transformer technology water supply joint control cabinet, and a booster pump control cabinet. The main transformer water supply unit includes a booster pump set and a main transformer cooler; The water intake is connected to the booster pump group of one of the main transformer technical water supply units via a pipeline. The booster pump group is connected to the automatic water filtration unit via a pipeline. The water outlet of the automatic water filtration unit is connected to the four-way reversing electric valve via a cooling water supply pipe. The four-way reversing electric valve is connected to the main transformer cooler. The cooling water supply pipe is connected to the pipelines of the adjacent unit's main transformer cooler and booster pump. The booster pump control cabinet is connected to the booster pump group for control. The main transformer technical water supply joint control cabinet is connected to each valve in the system for control.

2. The main transformer technology water supply system according to claim 1, characterized in that, The outlet of the main transformer cooler is connected to a drain pipe equipped with a main drain valve.

3. A water supply interruption alarm system, characterized in that, The main transformer technology water supply system according to any one of claims 1-2 includes a data acquisition module, a logic judgment module, and an alarm output module; The data acquisition module is installed on the main transformer technical water supply system and collects the flow and pressure of the main transformer technical water supply main pipe, the voltage of the main transformer low-pressure side, the backwash status signal of the water filter, the forward and reverse water supply signals of the four-way reversing electric valve, the control mode signal of the main transformer technical water supply joint control cabinet, and the control mode signal of the booster pump control cabinet. The logic judgment module and the data acquisition module perform logical operations based on the acquired signal data to determine whether the alarm conditions are met. If the alarm conditions are met, a signal is sent to the alarm output module. The alarm output module is connected to the logic judgment module. After receiving the signal from the logic judgment module, it outputs an alarm signal indicating that the main transformer's water supply is interrupted.

4. The water supply interruption alarm system according to claim 3, characterized in that, The logical operations include operating condition logic judgment and alarm logic output; The operating condition logic judgment process is as follows: Based on the current operating conditions, retrieve the corresponding condition group and determine whether the conditions of the condition group are met. If they are met, monitor the main pipe flow rate Q and the main pipe pressure P in real time. Based on the current main pipe flow rate Q and main pipe pressure P, the system compares and judges with the corresponding flow rate setpoint and pressure setpoint. Based on the judgment result, a delay is initiated. If the delay time exceeds the set time, a preset alarm signal is output. The alarm logic output process is as follows: The monitoring logic will output an alarm signal indicating that the main transformer's water supply is interrupted if a preset alarm signal is detected.

5. The water supply interruption alarm system according to claim 4, characterized in that, The operating condition logic judgment includes the logic judgment of normal operating condition, the logic judgment of water supply connection condition, and the logic judgment when the four-way reversing valve is operating.

6. The water supply interruption alarm system according to claim 5, characterized in that, In the logical judgment of the normal operating condition, the condition group includes a first condition and a second condition; The first condition is that the first booster pump is running, or the second booster pump is running, or the voltage on the low-voltage side of the main transformer is greater than a set value; The second condition is that no backwashing status signal of the water filter is detected, and no forward water supply signal or reverse water supply signal of the four-way reversing electric valve is detected.

7. The water supply interruption alarm system according to claim 6, characterized in that, In the logical judgment of the water supply status, the condition group includes a third condition and a second condition. The third condition is that the main transformer technical water supply joint control cabinet is out of operation and the control mode handle of the booster pump control cabinet is switched to the cut-off position, the adjacent unit connecting valve is fully open, the total pipe flow rate is greater than the connection operation judgment setting value, the total pipe pressure is greater than the connection operation judgment setting value, or the main transformer low-voltage side voltage is greater than the setting value.

8. The water supply interruption alarm system according to claim 6, characterized in that, In the logical judgment during the operation of the four-way directional valve, the condition group includes a first condition and a fourth condition: The fourth condition is that no positive or reverse water supply signal is detected from the four-way reversing electric valve.

9. A method for alarming water supply interruption, characterized in that, Based on the main transformer technology water supply system according to any one of claims 1-2, the method includes: S1: Real-time acquisition of backwash status signals of water filter, forward and reverse water supply signals of four-way reversing electric valve, control mode signals of main transformer technical water supply joint control cabinet and control mode signals of booster pump control cabinet; S2: Based on the collected signal, perform a logical judgment on whether the alarm conditions are met. If the alarm conditions are met, output an alarm signal. The logical judgment is as follows: Based on the current operating conditions, different condition judgments are performed to determine whether the set conditions are met. If they are met, the main pipe flow rate Q and main pipe pressure P are monitored in real time. Based on the current main pipe flow rate Q and main pipe pressure P, the system compares and judges with the corresponding flow rate setpoint and pressure setpoint. Based on the judgment result, a delay is initiated. If the delay time exceeds the set time, a preset alarm signal is output.

10. The water supply interruption alarm method according to claim 9, characterized in that, Under normal operating conditions, the judgment of the first and second conditions is executed; under the inter-water supply condition, the judgment of the second and third conditions is executed; when the four-way reversing valve is operated, the first and fourth conditions are executed. In the condition judgment of the corresponding working condition, if any condition is met, that is, the set condition is met; The first condition is that the first booster pump is running, or the second booster pump is running, or the voltage on the low-voltage side of the main transformer is greater than a set value; The second condition is that no backwashing status signal of the water filter is detected, and no forward water supply signal or reverse water supply signal of the four-way reversing electric valve is detected. The third condition is that the main transformer technical water supply joint control cabinet is out of operation and the control mode handle of the booster pump control cabinet is switched to the cut-off position, the adjacent unit connecting valve is fully open, the main pipe flow rate is greater than the connection operation judgment setting value, the main pipe pressure is greater than the connection operation judgment setting value, or the main transformer low-voltage side voltage is greater than the setting value. The fourth condition is that no positive or reverse water supply signal is detected from the four-way reversing electric valve.

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