A method for dispatching a storage tank system based on centralized control mode

Abstract

The present invention provides a method for scheduling a regulating reservoir system based on a centralized control mode, comprising the following steps: S1, upgrading and renovating the automation foundation of the drainage regulating reservoir; S2, setting a set of start and stop liquid level values ​​for the PLC program; S3, automatically judging in real time whether the liquid level of the regulating reservoir exceeds the warning value and whether an abnormal situation occurs; S4, when the inlet and outlet water indicators are abnormal or an emergency occurs, enter S5, and when everything is normal, enter S6; S5, manual intervention, manual scheduling of the start and stop of the pump station pump unit and the regulating reservoir pump unit; S6, automatic operation, the PLC automatically judges the start and stop of the regulating reservoir pump unit according to the preset start and stop liquid level values. With the industrial computer as the upper control core, the production intranet and network security equipment are planned, a remote control system based on a dedicated network is established, and a reliable PLC is used as the lower control core to build a local control system to ensure that the drainage system can run uninterruptedly for a long time when the remote control system is abnormal.

Description

Technical Field

[0001] The present invention relates to the field of remote control technology, and in particular to a method for dispatching a regulating reservoir system based on a centralized control mode. Background Art

[0002] With the continuous acceleration of my country's urbanization process, the urban population has expanded rapidly, and urban water pollution and water shortage have become increasingly serious. Improving the degree of sewage treatment and promoting the healthy circulation of water are the goals that the current urban drainage system urgently needs to achieve. The urban drainage system is spread throughout the city. It is a complex system with a wide geographical distribution. It consists of water collection wells, underground transmission pipelines, distributed drainage pumping stations, storage tanks and water purification plants, etc., which collect, transport and treat daily sewage, industrial production wastewater and some natural precipitation. The use of storage tanks can intercept and control the initial rainwater in the city. At the same time, the intercepted rainwater will be directly transported to the city's sewage system, reducing the overall content of harmful substances and organic matter in the rainwater, preventing it from being directly discharged into the river, and helping to solve the problem of initial rainwater pollution of the river. The use of rainwater storage tanks can effectively protect the overall water environment of the city and fundamentally improve the water ecological safety. Generally speaking, when the regulating reservoir is in the water-filled state, it is mainly at the initial stage of rainfall in the area, and when the overall water level of the inlet is higher than the highest standard water level of the sewage treatment area inside the regulating reservoir, the rainwater will first flow into the reservoir area. Once the overall water level of the reservoir area of ​​the regulating reservoir reaches the standard position, the channels and valves in the water-inlet area will be completely closed; when the regulating reservoir is in the drainage state, its facility area needs to use the time nodes with relatively low total sewage drainage volume according to the actual treatment and operation conditions of the external environment sewage network, and use manual pumping into the sewage network system.

[0003] In the control system of the regulating reservoir, high-power water pump units and electric gates are the main control objects. The automation foundation of traditional urban drainage regulating reservoirs is generally poor, and most of them adopt a decentralized control method based on local computers. In this method, there is a lack of information interaction between regional pumping stations, regulating reservoirs, and water purification plants. Entering the new century, due to the progress of computer network transmission technology and remote control technology, network-based distributed control systems have developed rapidly. Distributed control systems integrate the advantages of distributed instrument control systems and centralized computer control systems: geographical distribution tends to be decentralized and logical functions tend to be centralized. It is difficult to apply distributed control systems to complex urban drainage systems. The main reason is that distributed control systems are centered on the network, and the network plays a decisive role in the real-time, reliability and scalability of the entire system.

[0004] However, domestic urban drainage systems are rarely equipped with network communication systems, and most of them are still operated manually. The control system of the reservoir is composed of sensors, controllers, display instruments, pump units, gates and other equipment. The realization of the control function depends on the normal operation of key equipment. So far, the discovery and elimination of equipment failures have been completely dependent on the stability of the sensor. If the sensor itself fails, the system is likely to have a false alarm or even lose the alarm function, thus posing a hidden danger to equipment safety. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for scheduling a regulating reservoir system based on a centralized control mode, which solves the problem in the prior art that the discovery and elimination of equipment faults completely rely on the stability of sensors. If the sensor itself fails, the system is likely to give a false alarm or even lose its alarm function, thereby posing a hidden danger to equipment safety.

[0006] According to a technical solution of the present invention, a method for dispatching a storage tank system in a centralized control mode comprises the following steps:

[0007] S1. Upgrade and reconstruct the automation foundation of the drainage storage tank, and build a remote control system for the storage tank with an industrial computer as the core remote network control system and a local control system with a PLC as the core, and their combined network structure;

[0008] S2. Set a set of start and stop liquid level values ​​for the PLC program. Under normal automatic operation of the submersible sewage pump and the gate, they will automatically start and stop according to the set liquid level, and preset the early warning values ​​of various production indicators;

[0009] S3. Receive the real-time liquid level, flow rate, and water quality index information of the inlet and outlet pump rooms of the sewage treatment unit through the detection elements at the production site, and judge in real time whether the liquid level of the regulating reservoir is abnormal. Combined with the real-time rainfall in the weather forecast, automatically judge in real time whether the liquid level of the regulating reservoir exceeds the warning value and whether there is any abnormality;

[0010] S4: When the water inlet and outlet indicators are abnormal or an emergency occurs, enter S5; when everything is normal, enter S6;

[0011] S5: Human intervention switches the control of the water pump unit in the regulating reservoir to the local mode, or remote / manual mode, and manually schedules the start and stop of the water pump unit in the pump station and the water pump unit in the regulating reservoir;

[0012] S6, automatic operation, the control right of the regulating reservoir water pump unit is cut to the remote side, the control mode is cut to automatic, and the PLC automatically determines the start and stop of the regulating reservoir water pump unit according to the preset start and stop liquid level values.

[0013] Furthermore, in the manual operation mode of the regulating reservoir water pump unit, the regulating reservoir water pump unit is not controlled by the PLC, and the operating personnel manually operate the local control cabinet or the host computer to command the start and stop of the regulating reservoir water pump unit.

[0014] Furthermore, in the automatic operation mode of the regulating reservoir water pump unit, of the n submersible sewage pumps in the regulating reservoir water pump unit, n-1 are main pumps and 1 is a standby pump. The main and standby pumps are automatically rotated according to the cumulative number of working times or the cumulative running time. In principle, it is prohibited for n submersible sewage pumps to operate at the same time. When the liquid level in the pump pool reaches the first pump-starting liquid level, the submersible sewage pump with the least running time or the least running times among the n pumps is automatically started. When the liquid level continues to rise to reach the second pump-starting liquid level, the submersible sewage pump with the second least running time or running times among the n pumps is automatically started, and so on. When the liquid level in the pump pool drops to the first pump-stop liquid level, the submersible sewage pump with the longest running time or running times among the running submersible sewage pumps is stopped. When the liquid level continues to drop to the second pump-stop liquid level, the submersible sewage pump with the second longest running time or running times among the running submersible sewage pumps is stopped, and so on.

[0015] Furthermore, the start and stop control of each submersible sewage pump, axial flow pump and each gate of the water pump unit in the regulating reservoir is equipped with three-level control: local control cabinet, plant station host computer and centralized control host computer.

[0016] Furthermore, when the control mode of the submersible sewage pump is switched to "manual", the plant station host computer and the centralized control host computer can order the submersible sewage pump to start and stop. At this time, the PLC preset start and stop liquid level values ​​are not effective.

[0017] Furthermore, when the control mode of the submersible sewage pump is switched to "automatic", the PLC starts and stops the submersible sewage pump according to the preset start and stop liquid level values. At this time, the plant station host computer and the centralized control host computer control lock.

[0018] Furthermore, the on-site control cabinet of the submersible sewage pump is provided with a "remote / local" knob. When the knob is switched to "remote", the submersible sewage pump is controlled by the PLC program, the plant station host computer and the centralized control host computer, and the on-site control cabinet controls the lock; when the knob is switched to "local", the submersible sewage pump is controlled by the start and stop buttons of the on-site control cabinet, and the plant station host computer and the centralized control host computer controls the lock.

[0019] Furthermore, the plant station host computer and the centralized control host computer are provided with a "centralized control / plant station" soft switch. When the soft switch is switched to "centralized control", the centralized control host computer can order the submersible sewage pump to start or stop, and the plant station host computer controls the interlock; when switched to "plant station", the plant station host computer can order the submersible sewage pump to start or stop, and the centralized control host computer controls the interlock.

[0020] Furthermore, the remote network control system uses signals from the host computer, network communication system, PLC equipment, and relay equipment to implement operation commands, including starting and stopping on-site equipment and facilities and modifying PLC analog quantities.

[0021] Furthermore, the remote control system of the regulating reservoir uses various production site sensor data acquisition equipment, PLC equipment, and network communication systems to realize real-time collection, uploading, processing, and monitoring of various production signals and data.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention selects an industrial computer with powerful computing power and convenient networking as the upper-level control core, plans the production intranet and network security equipment, establishes a remote control system based on a dedicated network, and realizes coordinated optimization scheduling; uses a PLC with reliable performance as the lower-level control core to build a local control system to ensure that the drainage system can operate uninterruptedly for a long time when the remote control system is abnormal; remotely schedules the start and stop of the sewage pump station pump unit and the regulating reservoir pump unit to achieve the purpose of water diversion and water storage, greatly increasing the emergency response capability and flexibility of the urban drainage system.

[0024] 2. The present invention proposes a method for liquid level control of water pump units and gate start and stop, and realizes the function of real-time and convenient adjustment of preset parameters. Under the premise of ensuring urban drainage safety, it reduces operation and maintenance costs, extends the service life of water pumps, saves energy and reduces consumption, and mitigates the impact on the power grid, which is in line with the concept of energy saving and power saving.

[0025] 3. The method of the present invention is simple and easy to use, and has good scalability. The present invention can be widely used in the field of urban water environment treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 This is a schematic diagram of the network structure of an embodiment of the present invention;

[0028] Figure 2 The present invention is a production operation flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The embodiment of the present invention proposes a method for dispatching a storage tank system based on a centralized control mode, such as Figure 1~2 As shown, the following steps are included:

[0034] S1. Upgrade and reconstruct the automation foundation of the drainage storage tank, and build a remote control system for the storage tank with an industrial computer as the core remote network control system and a local control system with a PLC as the core, and their combined network structure;

[0035] S2. Set a set of start and stop liquid level values ​​for the PLC program. Under normal automatic operation of the submersible sewage pump and the gate, they will automatically start and stop according to the set liquid level, and preset the early warning values ​​of various production indicators;

[0036] S3. Receive the real-time liquid level, flow rate, and water quality index information of the inlet and outlet pump rooms of sewage treatment plants, temporary treatment stations, pump stations, regulating reservoirs and other sewage treatment units through various sensors, signal transmitters, PLCs, network transmission links and other detection elements at the production site, and judge in real time whether the liquid level of the regulating reservoir is abnormal. Combined with the real-time rainfall in the weather forecast, automatically judge in real time whether the liquid level of the regulating reservoir exceeds the warning value and whether there is any abnormality;

[0037] S4: When the water inlet and outlet indicators are abnormal, or a processing unit needs to be temporarily overhauled or production is reduced, or heavy rain is coming, enter S5; when everything is normal, enter S6;

[0038] S5. Human intervention switches the control of the reservoir water pump unit to the local mode, or remote / manual mode;

[0039] S6, automatic operation, switch the control right of the regulating reservoir water pump unit to the remote location, and switch the control mode to automatic.

[0040] By upgrading and renovating the automation foundation of the drainage storage tank, the composition and network structure of the remote control system of the storage tank were proposed, and the remote network control system with industrial computer as the core and the local control system with PLC as the core were designed and implemented.

[0041] By receiving real-time information on the level, flow rate, water quality and other indicators of the inlet and outlet pump rooms of water purification plants and temporary treatment stations, it can determine whether there are any abnormalities in real time. When the inlet and outlet indicators are abnormal or a treatment unit needs to be temporarily overhauled or reduced in production, manual intervention can be performed to remotely dispatch the start and stop of the pump station pump unit, the regulating reservoir pump unit and the gate to achieve the purpose of water diversion and water storage, greatly increasing the flexibility of the urban drainage system.

[0042] By receiving real-time rainfall forecast information from the weather forecast on rainy days, we can free up storage capacity in the air-conditioning storage tank in advance, collect initial rain and light rain during rainfall periods, and prevent rainwater runoff from entering the river and causing river and water pollution. During heavy rains, we can also store some sewage, reduce the risk of pipeline overflow, and relieve pressure on water purification plants.

[0043] This embodiment selects an industrial computer with powerful computing power and convenient networking as the upper-level control core, plans the production intranet and network security equipment, establishes a remote control system based on a dedicated network, and realizes coordinated and optimized scheduling; uses a PLC with reliable performance as the lower-level control core, and builds a local control system to ensure long-term uninterrupted operation of the drainage system in the event of an abnormality in the remote control system; remotely schedules the start and stop of the sewage pump station pump unit and the regulating reservoir pump unit to achieve the purpose of water diversion and water storage, greatly increasing the emergency response capability and flexibility of the urban drainage system.

[0044] Specifically, the remote network control system with industrial computer as the core and the local control system with PLC as the core are realized through the following steps:

[0045] Step 1: Conventional centralized control methods are affected by factors such as network signal interruption, blocking, and data loss, and the control effect is not ideal. Starting from the reliability of control, a hierarchical control structure with multiple control cores is designed for large systems. Industrial computers with powerful computing power and convenient networking are selected as the upper-level control core. Production intranet and network security equipment are planned, and a remote control system based on a local dedicated network is established to achieve coordinated and optimized scheduling;

[0046] Step 2: Use a reliable PLC as the lower-level control core to build a local control system to ensure long-term, uninterrupted and stable operation of the drainage system in the event of an abnormality in the remote control system.

[0047] A method for controlling the start and stop of a water pump unit and a gate by liquid level is implemented by the following steps:

[0048] Step 1: Set a set of start and stop liquid level values ​​for the PLC program. The submersible sewage pump and gate will automatically start and stop according to the set liquid level during normal automatic operation. Under normal circumstances, manual operation is avoided, reducing the labor cost of operation and maintenance.

[0049] Step 2: The host computer can issue commands at any time to modify the start / stop liquid level value preset by the PLC, automatically determine in real time whether the actual liquid level meets the start / stop liquid level preset value, and automatically control the start and stop of the submersible sewage pump and gate, thus realizing efficient treatment of sewage water;

[0050] Step 3: Alarm for abnormal liquid level setting value. Under normal circumstances, “liquid level value of all stopped pumps” < “liquid level value of stopping n-1 pumps” <… < “liquid level value of stopping 1 pump” < “liquid level value of starting 1 pump” <… < “liquid level value of starting n-1 pumps” < “liquid level value of starting n pumps”. When the set value does not meet the above conditions, the system will automatically alarm.

[0051] It realizes the function of real-time and convenient adjustment of preset parameters. Under the premise of ensuring the safety of urban drainage, it reduces operation and maintenance costs, extends the service life of water pumps, saves energy and reduces consumption, and mitigates the impact on the power grid, which is in line with the concept of energy conservation and power saving.

[0052] Submersible sewage pumps and gates are controlled in two ways: automatic and manual. They are equipped with three levels of control: local control cabinet, plant station host computer (touch screen), and centralized control host computer. They can be used in combination according to actual conditions and can be realized through the following steps:

[0053] In the automatic operation mode of the submersible sewage pump, among n submersible sewage pumps, n-1 are main pumps and 1 is a standby pump. The main and standby pumps are automatically rotated according to the cumulative number of working times or the cumulative running time. In principle, it is forbidden for n submersible sewage pumps to run at the same time.

[0054] When the liquid level in the pump pool reaches the first pump start level, the submersible sewage pump with the least running time or the least running times among the n units is automatically started. When the liquid level continues to rise and reaches the second pump start level, the submersible sewage pump with the least running time or the least running times among the n units is automatically started, and so on.

[0055] When the liquid level in the pump pool drops to the first pump-stopping liquid level, the submersible sewage pump with the longest running time or running times among the running submersible sewage pumps is stopped; when the liquid level continues to drop to the second pump-stopping liquid level, the second submersible sewage pump is stopped, and so on;

[0056] In the manual operation mode of the submersible sewage pump, the submersible sewage pump is not controlled by the PLC, and the operating personnel manually operate the local control cabinet to start and stop the submersible sewage pump.

[0057] Control mode switching, submersible sewage pump is divided into two control modes: "automatic / manual":

[0058] When the control mode is switched to "automatic", the PLC starts and stops the submersible sewage pump according to the start / stop liquid level value preset by the host computer (the plant station host computer (touch screen) and the centralized control host computer control interlock);

[0059] When the control mode is switched to "manual", the plant host computer (touch screen) and the centralized control host computer can command the start and stop of the submersible sewage pump (the PLC preset start / stop liquid level value is not effective).

[0060] Control right switching, the local control cabinet of the submersible sewage pump is equipped with a "remote / local" knob:

[0061] When the knob is switched to "remote", the submersible sewage pump is controlled by the PLC program, the plant station host computer (touch screen), and the centralized control host computer (the local control cabinet controls the lock);

[0062] When the knob is switched to "on-site", the submersible sewage pump is controlled by the start and stop buttons of the on-site control cabinet (the plant station host computer (touch screen) and the centralized control host computer control the lock).

[0063] The plant station host computer (touch screen) and centralized control host computer are equipped with "centralized control / plant station" soft switch:

[0064] When the soft switch is switched to "centralized control", the centralized control host computer can order the start and stop of the submersible sewage pump (the plant station host computer (touch screen) controls the lock);

[0065] When switched to "plant station", the plant station host computer (touch screen) can command the start and stop of the submersible sewage pump (the centralized control host computer controls the lock).

[0066] The remote network control system uses signals from the host computer, network communication system, PLC equipment, and relay equipment to implement operation commands, including starting and stopping on-site equipment and facilities and modifying PLC analog quantities.

[0067] The remote control system of the regulating reservoir uses various production site sensor data acquisition equipment, PLC equipment, and network communication systems to realize real-time collection, uploading, processing, and monitoring of various production signals and data.

[0068] like Figure 1 As shown in the figure, planning the production intranet and network security equipment and establishing a remote control system based on a dedicated network have greatly improved the stability of system data transmission.

[0069] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is set forth to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in the specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly set forth in the specification in a similar manner.

[0070] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0071] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0072] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0073] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A method for dispatching a storage tank system based on a centralized control mode, characterized in that: The following steps are involved: S1. Upgrade and reconstruct the automation foundation of the drainage storage tank, and build a remote control system for the storage tank with an industrial computer as the core remote network control system and a local control system with a PLC as the core, and their combined network structure; S2. Set a set of start and stop liquid level values ​​for the PLC program. Under normal automatic operation of the submersible sewage pump and the gate, they will automatically start and stop according to the set liquid level, and preset the early warning values ​​of various production indicators; S3. Receive the real-time liquid level, flow rate, and water quality index information of the inlet and outlet pump rooms of the sewage treatment unit through the detection elements at the production site, and judge in real time whether the liquid level of the regulating reservoir is abnormal. Combined with the real-time rainfall in the weather forecast, automatically judge in real time whether the liquid level of the regulating reservoir exceeds the warning value and whether there is any abnormality; S4: When the water inlet and outlet indicators are abnormal or an emergency occurs, enter S5; when everything is normal, enter S6; S5: Human intervention switches the control of the water pump unit in the regulating reservoir to the local mode, or remote / manual mode, and manually schedules the start and stop of the water pump unit in the pump station and the water pump unit in the regulating reservoir; S6, automatic operation, the control right of the regulating reservoir water pump unit is switched to the remote, the control mode is switched to automatic, and the PLC automatically determines the start and stop of the regulating reservoir water pump unit according to the preset start and stop liquid level values; In the automatic operation mode of the regulating reservoir water pump unit, among the n submersible sewage pumps in the regulating reservoir water pump unit, n-1 are main pumps and 1 is a standby pump. The main and standby pumps are automatically rotated according to the cumulative working times or the cumulative running time. In principle, it is forbidden for n submersible sewage pumps to run at the same time. When the pump pool liquid level reaches the first pump start level, the submersible sewage pump with the least running time or the least running times among the n pumps is automatically started. When the liquid level continues to rise to reach the second pump start level, the submersible sewage pump with the second least running time or running times among the n pumps is automatically started, and so on. When the pump pool liquid level drops to the first pump stop level, the submersible sewage pump with the longest running time or running times among the submersible sewage pumps that have been running is stopped. When the liquid level continues to drop to the second pump stop level, the submersible sewage pump with the second longest running time or running times among the submersible sewage pumps that have been running is stopped, and so on. The start and stop control of each submersible sewage pump, axial flow pump and each gate of the water pump unit in the regulating reservoir is equipped with three-level control: local control cabinet, plant station host computer and centralized control host computer.

2. A method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: In the manual operation mode of the regulating reservoir water pump unit, the regulating reservoir water pump unit is not controlled by the PLC, and the operating personnel manually operate the local control cabinet or the host computer to command the start and stop of the regulating reservoir water pump unit.

3. A method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: When the control mode of the submersible sewage pump is switched to "manual", the plant station host computer and the centralized control host computer can order the submersible sewage pump to start and stop. At this time, the PLC preset start and stop liquid level values ​​are not effective.

4. A method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: When the control mode of the submersible sewage pump is switched to "automatic", the PLC starts and stops the submersible sewage pump according to the preset start and stop liquid level values. At this time, the plant station host computer and the centralized control host computer control lock.

5. The method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: The local control cabinet of the submersible sewage pump is equipped with a "remote / local" knob. When the knob is switched to "remote", the submersible sewage pump is controlled by the PLC program, the plant station host computer and the centralized control host computer, and the local control cabinet controls the lock; when the knob is switched to "local", the submersible sewage pump is controlled by the start and stop buttons of the local control cabinet, and the plant station host computer and the centralized control host computer controls the lock.

6. A method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: The plant station host computer and the centralized control host computer are equipped with a "centralized control / plant station" soft switch. When the soft switch is switched to "centralized control", the centralized control host computer can order the submersible sewage pump to start or stop, and the plant station host computer controls to be locked; when switched to "plant station", the plant station host computer can order the submersible sewage pump to start or stop, and the centralized control host computer controls to be locked.

7. A method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: The remote network control system uses signals from the host computer, network communication system, PLC equipment, and relay equipment to implement operation commands, including starting and stopping on-site equipment and facilities and modifying PLC analog quantities.

8. The method for dispatching a storage tank system based on a centralized control mode according to claim 1, characterized in that: The remote control system of the regulating reservoir uses various production site sensor data acquisition equipment, PLC equipment, and network communication systems to realize real-time collection, uploading, processing, and monitoring of various production signals and data.

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