CN108279632A - A kind of pumping plant wisdom draining Dispatching Control System - Google Patents
A kind of pumping plant wisdom draining Dispatching Control System Download PDFInfo
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- CN108279632A CN108279632A CN201810133284.XA CN201810133284A CN108279632A CN 108279632 A CN108279632 A CN 108279632A CN 201810133284 A CN201810133284 A CN 201810133284A CN 108279632 A CN108279632 A CN 108279632A
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- 238000005086 pumping Methods 0.000 title abstract 8
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 261
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Abstract
The invention discloses a kind of pumping plant wisdom to drain Dispatching Control System, its key points of the technical solution are that it is characterised in that it includes data detecting unit, mode selecting unit, scheduling unit and control unit；Data detecting unit is used to obtain the liquid level signal of intake pool and discharge bay in single pumping plant, in single pumping plant in the pressure signal of outlet pipe and single pumping plant outlet pipe flow signal；Multiple low layer mode interfaces are configured in mode selecting unit, the low layer mode interface is used to obtain the selection request of user；Control unit is configured as：Permanent liquid level pattern corresponding with each low layer mode interface, constant voltage mode and current-limit mode are established, and the request of the selection based on user enters in corresponding permanent liquid level pattern, constant voltage mode and current-limit mode.Each pumping plant can carry out mutual cooperation scheduling, to avoid the unordered draining between upstream and downstream pumping plant, to effectively increase the draining order of whole pumping plant, to improve drainage efficiency.
Description
Technical Field
The invention relates to the field of control scheduling, in particular to an intelligent drainage scheduling control system for a pump station.
Background
In the municipal sewage treatment system, the drainage pump station not only plays the role of conveying the whole municipal sewage to each sewage treatment plant, but also has the functions of sewage pretreatment such as grid filtration, anaerobic treatment of a buffer tank and the like, water quantity allocation of a drainage pipe network and the like.
The main task of the device is to collect sewage discharged by various users, lift the sewage to a certain height, flow to the next pump station through gravity or push the sewage to the next pump station through pressure, and discharge the sewage to a sewage treatment plant by the last pump station.
Therefore, when daily drainage scheduling is carried out, disordered drainage of each pump station is easy to generate, the drainage efficiency of the pump stations is influenced, or local pump station sewage overflow is caused due to unbalanced scheduling.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the intelligent drainage scheduling control system for the pump station, which has the characteristics of ensuring the stable operation of the pump station, improving the drainage efficiency of the pump station, saving energy consumption, prolonging the service life of equipment and preventing sewage overflow.
The technical purpose of the invention is realized by the following technical scheme:
a pump station intelligent drainage scheduling control system comprises a data detection unit, a mode selection unit, a scheduling unit and a control unit, wherein the data detection unit, the mode selection unit and the scheduling unit are respectively connected with the control unit;
the data detection unit is used for acquiring liquid level signals of a water inlet pool and a water outlet pool in a single pump station, pressure signals of a water outlet pipe in the single pump station and flow signals of the water outlet pipe in the single pump station;
the mode selection unit is configured with a plurality of low-level mode interfaces, and the low-level mode interfaces are used for acquiring selection requests of users;
the control unit is configured to:
establishing a constant liquid level mode, a constant pressure mode and a flow limiting mode corresponding to each low-level mode interface, and entering the corresponding constant liquid level mode, constant pressure mode and flow limiting mode based on a selection request of a user; wherein,
in the constant liquid level mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the liquid level signal so as to keep the liquid levels of the water inlet pool and the water outlet pool constant to a preset range;
in the constant pressure mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the pressure signal so as to keep the pressure of the water outlet pipe constant to a preset range;
in the current limiting mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the flow signal so as to keep the flow of the water outlet pipe constant to a preset range.
Preferably, in the constant level mode, the control unit is configured to:
setting a drainage high liquid level of a water inlet pool and a water inlet low liquid level of a water outlet pool;
setting a low liquid level of a water inlet pool and a high liquid level of a water outlet pool;
judging whether the liquid level of the water inlet pool reaches a set drainage high liquid level or whether the liquid level of the water outlet pool reaches a set water inlet low liquid level based on the acquired liquid level signal;
if so, controlling the multiple water pumps to start the first water pump according to a preset starting sequence according to the instruction of the scheduling unit, and further judging whether the water level of the water inlet pool continues to rise or the water level of the water outlet pool continues to fall, if so, starting the second water pump according to the preset starting sequence until the multiple water pumps are all started.
Preferably, in the constant level mode, the control unit is further configured to:
judging whether the water level of the water inlet pool is reduced to a low liquid level of the pump stopping or the water level of the water outlet pool is increased to a high liquid level of the pump stopping;
if so, controlling the multiple water pumps to shut down the first water pump according to a preset shut-down sequence according to the instruction of the scheduling unit, further judging whether the water level of the water inlet pool continuously descends or the water level of the water outlet pool continuously ascends, and if so, shutting down the second water pump according to the preset shut-down sequence until the multiple water pumps are completely shut down.
Preferably, in the constant voltage mode, the control unit is configured to:
setting the low drainage pressure and the high pump stopping pressure of the water outlet pipe;
judging whether the pressure of the water outlet pipe reaches a set drainage low pressure or not based on the acquired pressure signal;
if so, controlling the multiple water pumps to start the first water pump according to a preset starting sequence according to the instruction of the scheduling unit, and further judging whether the pressure of the water outlet pipe continuously drops, if so, starting the second water pump according to the preset starting sequence until the multiple water pumps are all started.
Preferably, in the constant voltage mode, the control unit is further configured to:
judging whether the pressure of the water outlet pipe reaches the set high pressure for stopping the pump;
if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the pressure of the water outlet pipe continuously rises, and if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are completely shut down.
Preferably, in the current limiting mode, the control unit is configured to:
judging whether the flow of the water outlet pipe is smaller than a preset flow or not based on the acquired flow signal;
if so, further judging whether the pressure of the water outlet pipe reaches the set drainage low pressure or not based on the acquired pressure signal;
if yes, controlling the multiple water pumps to start a first water pump according to a preset starting sequence according to the instruction of the scheduling unit, further judging whether the flow of the water outlet pipe continuously drops, and starting a second water pump according to the preset starting sequence until the multiple water pumps are all started.
Preferably, the control unit is further configured to:
judging whether the flow of the water outlet pipe is larger than a preset flow or not;
if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the flow of the water outlet pipe continuously rises, and if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are completely shut down.
Preferably, the mode selection unit is further configured with a plurality of middle mode interfaces, and the middle mode interfaces are used for acquiring a selection request of a user;
the control unit is further configured to:
establishing an energy-saving mode, a long-life mode and a high-efficiency mode corresponding to each middle-layer mode interface, and entering the corresponding energy-saving mode, long-life mode and high-efficiency mode based on a selection request of a user; wherein,
in the energy-saving mode, the control unit controls each water pump in the pump station to operate in a variable frequency mode according to the instruction of the scheduling unit based on the selected constant liquid level mode, the constant pressure mode or the current limiting mode, and obtains the energy efficiency coefficient of each water pump to start the water pump with high energy efficiency coefficient preferentially;
in the long-life mode, the control unit controls the running time of each water pump in the pump station to be the same according to the instruction of the scheduling unit;
in the high-efficiency mode, the control unit controls all water pumps in the pump station to run at power frequency or super frequency according to the instruction of the scheduling unit.
Preferably, the energy efficiency coefficient = time opening rate energy consumption performance index device quality index, wherein,
time on rate = actual run time/(actual run time + downtime);
energy consumption performance index = actual production rate per actual electricity per rated flow rate;
equipment quality index = equipment theoretical depreciation cost/(equipment theoretical depreciation cost + equipment maintenance repair cost).
Preferably, the data detection unit is further configured to obtain a flow signal of a local water collecting nano pipe in a single pump station;
the mode selection unit is also provided with a high-level mode interface, and the high-level mode interface is used for acquiring a selection request of a user;
the control unit is further configured to:
establishing an automatic mode corresponding to the high-level mode interface, and entering the corresponding automatic mode based on a selection request of a user; wherein,
in the automatic mode, the control unit judges whether the flow signal of the local water collecting storage pipe in the pump station is smaller than a preset reference value or not based on the flow signal of the local water collecting storage pipe in the pump station, and if so, the pump station is controlled to enter the energy-saving mode or the long-life mode; otherwise, if not, the pump station is controlled to enter the high-efficiency mode.
In summary, compared with the prior art, the beneficial effects of the invention are as follows:
the system has the advantages that the constant liquid level mode, the constant pressure mode or the current limiting mode are selected by a user in the system and used for controlling the pump stations to work in the corresponding modes, so that each pump station can be matched and dispatched with each other, disordered drainage and sewage overflow events between an upstream pump station and a downstream pump station are avoided, stable operation of the pump stations is guaranteed, drainage orderliness of the whole pump station is effectively improved, drainage efficiency is improved, energy consumption is saved, the service life of equipment is prolonged, and the like.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic connection diagram of a pump station, an upper computer and a lower computer in the technical scheme of the invention;
fig. 2 is a system block diagram of a control scheduling system in the technical solution of the present invention.
Detailed Description
In order to better and clearly show the technical scheme of the invention, the invention is further described with reference to the attached drawings.
Example one
A pump station intelligent drainage scheduling control system comprises a data detection unit, a mode selection unit, a scheduling unit and a control unit, wherein the data detection unit, the mode selection unit and the scheduling unit are respectively connected with the control unit.
Each pump station comprises a water inlet pipe, a local water collecting nano pipe, a water inlet pool (or a pump pool), a water pump, a water outlet pool (or a high-level well) and a water outlet pipe which are connected in sequence. The local water collecting nano-pipe is used for collecting sewage collected by the local pipe network and transmitting the sewage to the water inlet pool. The water pump is arranged in the pump room and is driven by the motor. The pump station comprises a pump station, a water inlet pool, a pump pool, a water outlet pool or a high-level well, wherein the water inlet pool, the pump pool and the water outlet pool or the high-level well of the pump station are all provided with liquid level sensors which are used for outputting liquid level signals of the water inlet pool, the pump pool and the water outlet pool (or the high-level well); a pressure sensor and a flow sensor are arranged on a water outlet pipe of the pump station, and the pressure sensor is used for outputting a pressure signal and a flow signal of the water outlet pipe; and a flow sensor is arranged on the local water collecting containing pipe of the pump station and is used for outputting a flow signal of the local water collecting containing pipe. It is worth to be noted that when the water outlet pipe is not provided with the flow sensor, the scheduling unit can calculate the drainage flow according to the hydraulic model according to the data of the running time, the frequency, the liquid level and the like of the water pump; when the local water collecting nano pipe is not provided with the flow sensor, the dispatching unit can calculate the flow of the local water collecting nano pipe according to the flow data of the upstream and downstream pump stations and the pipe network model.
The scheduling unit is deployed in the upper computer and used for acquiring external data and management instructions, calculating the operation indexes of each pump station through correlation analysis of historical big data and real-time data, and making scheduling instructions.
The data detection unit in the system is used for acquiring liquid level signals of a water inlet pool (or a pump pool) and a water outlet pool (or a high-level well) in a single pump station, pressure signals of a water outlet pipe in the single pump station and flow signals of the water outlet pipe in the single pump station.
The mode selection unit is provided with a plurality of low-level mode interfaces, and the low-level mode interfaces are used for acquiring selection requests of users; the low-level mode interface may interface with an HMI touch screen or an external device, and in one embodiment, a user clicks on the touch screen to send a selection request to the low-level mode interface. In another embodiment, the external device includes a mouse or keyboard on which a user clicks to send a selection request to the low-level mode interface.
The control unit is configured to: establishing a constant liquid level mode, a constant pressure mode and a flow limiting mode corresponding to each lower layer mode interface, and entering the corresponding constant liquid level mode, constant pressure mode and flow limiting mode based on selection requests of a user.
In the constant liquid level mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the liquid level signal so as to keep the liquid levels of the water inlet pool (or the pump pool) and the water outlet pool (or the high-level well) constant to a preset range. In particular, in the constant level mode, the control unit is configured to: setting a high drainage liquid level of a water inlet pool (or a pump pool) and a low water inlet liquid level of a water outlet pool (or a high-level well); setting a low liquid level of a water inlet pool (or a pump pool) and a high liquid level of a water outlet pool (or a high-level well) in a pump-stopping way; judging whether the liquid level of the water inlet pool reaches a set drainage high liquid level or whether the liquid level of the water outlet pool reaches a set water inlet low liquid level based on the acquired liquid level signal; if so, controlling the multiple water pumps to start the first water pump according to a preset starting sequence according to the instruction of the scheduling unit, further judging whether the water level of the water inlet pool (or the pump pool) continuously rises or the water level of the water outlet pool (or the high-level well) continuously falls, if so, starting the second water pump according to the preset starting sequence until the multiple water pumps are all started, and simultaneously adjusting the frequency.
It is worth mentioning that the control unit is further configured to: judging whether the water level of the water inlet pool (or the pump pool) is reduced to a low liquid level of the pump stopping or the water level of the water outlet pool (or the high-level well) is increased to a high liquid level of the pump stopping; if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the water level of the water inlet pool (or the pump pool) continuously descends or the water level of the water outlet pool (or the high-level well) continuously ascends, if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are completely closed, and simultaneously adjusting the frequency.
In the constant pressure mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the pressure signal so as to keep the pressure of the water outlet pipe constant to a preset range. Specifically, in the constant voltage mode, the control unit is configured to: setting the low drainage pressure of a water outlet pipe and the high pump stopping pressure of the water outlet pipe; judging whether the pressure of the water outlet pipe reaches a set drainage low pressure or not based on the acquired pressure signal; if so, controlling the multiple water pumps to start the first water pump according to a preset starting sequence according to the instruction of the scheduling unit, further judging whether the pressure of the water outlet pipe continuously drops, if so, starting the second water pump according to the preset starting sequence until the multiple water pumps are all started, and simultaneously adjusting the frequency.
It is worth mentioning that the control unit is further configured to: judging whether the pressure of the water outlet pipe reaches the set high pressure for stopping the pump; if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the pressure of the water outlet pipe continuously rises, if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are completely shut down, and simultaneously adjusting the frequency.
In the flow limiting mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the flow signal so as to keep the flow of the water outlet pipe constant to a preset range. In particular, in the current limiting mode, the control unit is configured to: judging whether the flow of the water outlet pipe is smaller than a preset flow or not based on the acquired flow signal; if so, further judging whether the pressure of the water outlet pipe reaches the set drainage low pressure or not based on the acquired pressure signal; if yes, controlling the multiple water pumps according to the instructions of the scheduling unit to start a first water pump according to a preset starting sequence, further judging whether the flow of the water outlet pipe continuously drops, starting a second water pump according to the preset starting sequence until the multiple water pumps are all started, and adjusting the frequency.
It is worth mentioning that the control unit is further configured to: judging whether the flow of the water outlet pipe is larger than a preset flow or not; if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the flow of the water outlet pipe continuously rises, if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are all closed, and simultaneously adjusting the frequency.
In this application, the dispatch management of wisdom drainage is implemented for the leading role by the host computer, and this system configuration is in the host computer, and lower computer (PLC) sets up in every pump station, and the lower computer is arranged in compiling the data and the equipment operation data of each sensor in the pump station and sending to the host computer on to the corresponding scheduling instruction that is used for carrying out the host computer.
Therefore, the system controls each pump station to enter a corresponding constant liquid level mode, a constant pressure mode and a flow limiting mode based on a selection request of a user, so that each pump station can be matched and dispatched, the ordering of water drainage between an upstream pump station and a downstream pump station is improved, and the dispatching management of the whole pump station is realized.
The decision basis of each pump station mode selection is as follows:
1. the system comprises a drainage pipe network (including a rainwater pipe and a river channel) structure, an upstream-downstream relation, a flow capacity, a hydraulic model, and the water level, pressure and flow of each current node;
2. the drainage capacity, the current running state, the drainage margin and the trend of each drainage pump station;
3. the capacity, current operating state, processing margin and trend of each sewage treatment plant;
4. the load, margin and trend of each pump station buffer pool or city sponge unit;
5. water supply conditions, flood control conditions, weather (rainfall) and trends;
6. urban management and the need of 'five water co-treatment'.
Therefore, according to the drainage mode of each pump station, the lower computer of the pump station is given an instruction, and after the lower computer of each pump station receives the scheduling instruction of the system, the control mode is switched, the control parameters are adjusted and new control logic is implemented according to the drainage task, the control mode and the parameter requirements arranged by the upper computer.
Example two
The mode selection unit is also provided with a plurality of middle-layer mode interfaces, and the middle-layer mode interfaces are used for acquiring selection requests of users;
the control unit is further configured to: establishing an energy-saving mode, a long-life mode and a high-efficiency mode corresponding to each middle-layer mode interface, and entering the corresponding energy-saving mode, long-life mode and high-efficiency mode based on a selection request of a user. Wherein,
in the energy-saving mode, the scheduling unit calculates an energy efficiency coefficient based on the acquired electric quantity signal and the acquired flow signal, and establishes an energy-saving model; the control unit controls each water pump in the pump station to operate in a variable frequency mode according to the instruction of the scheduling unit based on the energy efficiency coefficient, the energy-saving model and the selected constant liquid level mode, constant pressure mode or current-limiting mode, and obtains the energy efficiency coefficient of each water pump to start the water pump with high energy efficiency coefficient preferentially.
Specifically, the dispatching unit issues dispatching instructions to a lower computer (PLC) of each pump station to control the variable-frequency control operation of the motor to achieve the purpose of variable-frequency operation of the water pump, so that a pump station constant liquid level mode, a constant pressure mode or a current limiting mode is realized in a variable-frequency mode instead of a single control mode of starting or stopping the water pump one by one.
When a new water pump needs to be started to operate, the water pump with high energy efficiency coefficient is started preferentially to save electric energy. Energy efficiency coefficient = time opening rate energy consumption performance index device quality index, wherein,
time on rate = actual run time/(actual run time + downtime);
energy consumption performance index = actual production rate per actual electricity per rated flow rate;
equipment quality index = equipment theoretical depreciation cost/(equipment theoretical depreciation cost + equipment maintenance repair cost).
Specifically, in view of the fact that the TPM emphasizes comprehensive and comprehensive equipment maintenance management, the OEE index calculation value for evaluating the comprehensive effect of the equipment must be trusted to truly reflect the management effect of the TPM. The OEE calculation method is very important and essential in device management.
Before analyzing the equipment OEE, we discuss another important equipment evaluation index, namely the equipment capability index CMK.
CMK=(T-2ε)/6σ
Wherein: t refers to the tolerance range; epsilon refers to the offset, which is equal to the mean value of the design criteria center minus the collected data; σ is the standard deviation. The equipment capacity index CMK is more than or equal to 1.67; when the equipment capacity cannot be achieved, immediately analyzing and taking corrective precautionary measures, and then analyzing again until the equipment capacity meets the requirements; if the production equipment cannot be improved, alternative production equipment should be sought.
Wherein: t refers to the tolerance range; epsilon refers to the offset, which is equal to the mean value of the design criteria center minus the collected data; σ is the standard deviation. The equipment capacity index CMK is more than or equal to 1.67; when the equipment capacity cannot be achieved, immediately analyzing and taking corrective precautionary measures, and then analyzing again until the equipment capacity meets the requirements; if the production equipment cannot be improved, alternative production equipment should be sought.
Similarly, in the process type sewage treatment production, a typical OEE calculation formula is difficult to apply, so that the OEE calculation formula needs to be modified and designed according to the management characteristics of sewage treatment equipment.
The principle of OEE revision design is a performance element for understanding the comprehensive efficiency of equipment in a specific industry. For the sewage treatment industry, the performance factors of the comprehensive efficiency of the equipment are the three factors of equipment life, operation energy consumption and maintenance cost.
The following design is to modify and design the actuation rate, performance index and quality index in a typical OEE calculation formula (OEE = time actuation rate × performance index × product quality index) according to this principle.
(1) Rate of opening
In the sewage treatment industry, the shorter the operation time or the running time in the time availability ratio or the starting ratio is, the better the operation time or the running time is, because in order to save electricity, a variable frequency control technology can be adopted, the running time is properly prolonged by frequency reduction, but the water treatment capacity of unit electricity consumption is increased; since most of the equipment is controlled by the automation system to run on and off or down according to the real-time condition, and the running optimization is carried out, the planned running time on the time running rate is dynamic. Therefore, we can simply replace the planned start-up time with the actual run-time plus the downtime to reflect the time-start-up rate of the sewage treatment plant, i.e.:
time start rate = actual run time/planned start time
= actual run time/(actual run time + downtime)
The actual running time and the fault shutdown time can be obtained from a lower computer of the pump station.
(2) Performance index
In the sewage treatment industry, total production in performance or performance index is not particularly desired, since it is desirable that the production be within a balanced interval and the operating costs can be reduced. To this end, and also to correct this, we replace the production performance per unit time with the production performance per unit energy consumption of the plant, and refer to as the "energy consumption performance index". For electric devices, we can colloquially use average production per degree of electricity to calculate an energy consumption performance index. Thus, the performance index may be expressed as a ratio of the production of actual unit energy consumption to the production of theoretical unit energy consumption.
Replacing the production performance index with the equipment energy saving efficiency, namely:
energy consumption performance index = yield of actual unit energy consumption/yield of theoretical unit energy consumption
For devices that are predominantly power consuming, energy consumption can be expressed in terms of electricity usage, i.e.:
energy consumption performance index = (actual output/actual quantity of electricity)/(rated flow rate/rated power)
= actual production x rated power/actual electricity/rated flow rate
The actual output (such as flow) and the actual electric quantity can be obtained from a lower computer of the pump station, and the rated power and the rated flow rate can adopt data provided by equipment manufacturers on equipment nameplates.
(3) Quality index
In the sewage treatment industry, the quality index is also difficult to determine by product percent of pass or product quality data. To correct this, we replace the product quality with the operating quality of the plant itself, and refer to as the "plant quality index". The quality index of the equipment can be measured by the ratio of the theoretical depreciation cost to the actual depreciation cost in the same time period, and the actual depreciation cost is the theoretical depreciation cost plus the maintenance cost.
Equipment quality index = equipment theoretical depreciation fee/equipment actual depreciation fee
= equipment depreciation cost/(equipment depreciation cost + equipment maintenance cost)
The equipment theoretical depreciation cost is counted according to the fixed asset depreciation cost booked by financial accounting, and the equipment maintenance cost is counted according to the actually generated maintenance cost and maintenance cost.
Through the correction treatment, the calculation formula of OEE in the sewage treatment industry is adjusted as follows:
OEE = time actuation rate × energy consumption performance index × device quality index
Wherein:
time on rate = actual run time/(actual run time + downtime)
Performance index of energy consumption = actual yield × rated power/actual electric quantity/rated flow rate
Equipment quality index = equipment theoretical depreciation cost/(equipment theoretical depreciation cost + equipment maintenance cost)
The OEE described above may be referred to as a green OEE due to considerations of energy savings and life cycle costs.
Most data in the formula can be acquired from a lower computer of a pump station and an equipment ledger, so that data parameters are formed and input into the system.
In the long-life mode, the scheduling unit calculates a life system based on the acquired water pump operation signal and the energy efficiency coefficient, and establishes a long-life model; the control unit controls the running time and the frequency of each water pump in the pump station to be the same according to the instruction of the scheduling unit based on the service life coefficient and the long service life model. Specifically, the system controls the running time of each water pump to be the same by monitoring the running time of each water pump and issuing a scheduling instruction according to a scheduling unit. That is, each water pump is started and stopped alternately to ensure that the pump station is in a constant liquid level mode, a constant pressure mode and a flow limiting mode.
In the high-efficiency mode, the control unit controls all water pumps in the pump station to run at power frequency or super frequency according to the instruction of the scheduling unit on the premise of ensuring the basic safety requirement.
It should be noted that the control unit is also provided with a combination mode, and the combination mode is to combine and apply the above modes. Specifically, a plurality of mode selections are arranged for a single pump station, an applicable control mode is selected according to the process characteristics and the management requirements of the pump station, the selected mode is subjected to priority sequencing, and the pump station is controlled according to the sequencing priority.
Therefore, when selecting the mode corresponding to the middle mode interface, the user is required to select the constant liquid level mode, the constant pressure mode or the current limiting mode corresponding to the low mode interface.
EXAMPLE III
The data detection unit is also used for acquiring flow signals of local water collecting storage pipes in a single pump station;
when the data detection unit cannot directly acquire a flow signal of a local water collecting nano pipe in a single pump station, the scheduling unit can calculate the flow of the local water collecting nano pipe through the flow of an upstream pump station and a downstream pump station, wherein the flow of the local water collecting nano pipe = the sum of the flow of the upstream pump station and the downstream pump station-the sum of the flow of the upstream pump station and the flow of the local pump station;
the mode selection unit is also provided with a high-level mode interface, and the high-level mode interface is used for acquiring a selection request of a user;
the control unit is further configured to: establishing an automatic mode corresponding to the high-level mode interface, and entering the corresponding automatic mode based on a selection request of a user; in the automatic mode, the control unit judges whether the flow signal of the local water collecting nano pipe in the pump station is smaller than a preset reference value or not based on the flow signal of the local water collecting nano pipe in the pump station, and if so, the pump station is controlled to enter the energy-saving mode or the long-life mode; otherwise, if not, the pump station is controlled to enter the high-efficiency mode.
The automatic control system comprises a pump station, a control unit, a constant liquid level mode, a constant pressure mode, a flow limiting mode and an automatic mode, wherein the automatic mode is selected after a user selects the constant liquid level mode, the constant pressure mode or the flow limiting mode, and in the automatic mode, the control unit controls the pump station to enter the energy-saving mode or the long-life mode through a preset mode.
Thus, in the automatic mode, the pump station will automatically control the control of the pump station mode in response to the flow signal from the local catchment holding pipe.
It is worth explaining that the control unit is also provided with an emergency mode, when the emergency mode is used for a special emergency event, part of pump stations are started in a high-efficiency mode, and part of pump stations are started in a current-limiting mode, so that the part of pump stations can drain water quickly to the maximum extent. The emergency mode mainly intervenes the drainage load of each pump station through manual work to satisfy the demand of emergency treatment.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A pump station intelligent drainage scheduling control system is characterized by comprising a data detection unit, a mode selection unit, a scheduling unit and a control unit, wherein the data detection unit, the mode selection unit and the scheduling unit are respectively connected with the control unit;
the data detection unit is used for acquiring liquid level signals of a water inlet pool and a water outlet pool in a single pump station, pressure signals of a water outlet pipe in the single pump station and flow signals of the water outlet pipe in the single pump station;
the mode selection unit is configured with a plurality of low-level mode interfaces, and the low-level mode interfaces are used for acquiring selection requests of users;
the control unit is configured to:
establishing a constant liquid level mode, a constant pressure mode and a flow limiting mode corresponding to each low-level mode interface, and entering the corresponding constant liquid level mode, constant pressure mode and flow limiting mode based on a selection request of a user; wherein,
in the constant liquid level mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the liquid level signal so as to keep the liquid levels of the water inlet pool and the water outlet pool constant to a preset range;
in the constant pressure mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the pressure signal so as to keep the pressure of the water outlet pipe constant to a preset range;
in the current limiting mode, the control unit controls the start and stop of a plurality of water pumps in the pump station according to the instruction of the scheduling unit based on the flow signal so as to keep the flow of the water outlet pipe constant to a preset range.
2. The pump station intelligent drainage scheduling control system according to claim 1, wherein in the constant level mode, the control unit is configured to:
setting a drainage high liquid level of a water inlet pool and a water inlet low liquid level of a water outlet pool;
setting a low liquid level of a water inlet pool and a high liquid level of a water outlet pool;
judging whether the liquid level of the water inlet pool reaches a set drainage high liquid level or whether the liquid level of the water outlet pool reaches a set water inlet low liquid level based on the acquired liquid level signal;
if so, controlling the multiple water pumps to start the first water pump according to a preset starting sequence according to the instruction of the scheduling unit, and further judging whether the water level of the water inlet pool continues to rise or the water level of the water outlet pool continues to fall, if so, starting the second water pump according to the preset starting sequence until the multiple water pumps are all started.
3. The pump station intelligent drainage scheduling control system of claim 2, wherein in the constant level mode, the control unit is further configured to:
judging whether the water level of the water inlet pool is reduced to a low liquid level of the pump stopping or the water level of the water outlet pool is increased to a high liquid level of the pump stopping;
if so, controlling the multiple water pumps to shut down the first water pump according to a preset shut-down sequence according to the instruction of the scheduling unit, further judging whether the water level of the water inlet pool continuously descends or the water level of the water outlet pool continuously ascends, and if so, shutting down the second water pump according to the preset shut-down sequence until the multiple water pumps are completely shut down.
4. The pump station intelligent drainage scheduling control system according to claim 1, wherein in the constant voltage mode, the control unit is configured to:
setting the low drainage pressure and the high pump stopping pressure of the water outlet pipe;
judging whether the pressure of the water outlet pipe reaches a set drainage low pressure or not based on the acquired pressure signal;
if so, controlling the multiple water pumps to start the first water pump according to a preset starting sequence according to the instruction of the scheduling unit, and further judging whether the pressure of the water outlet pipe continuously drops, if so, starting the second water pump according to the preset starting sequence until the multiple water pumps are all started.
5. The pump station intelligent drainage scheduling control system according to claim 4, wherein in the constant voltage mode, the control unit is further configured to:
judging whether the pressure of the water outlet pipe reaches the set high pressure for stopping the pump;
if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the pressure of the water outlet pipe continuously rises, and if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are completely shut down.
6. The pump station intelligent drainage scheduling control system according to claim 1, wherein in the current limit mode, the control unit is configured to:
judging whether the flow of the water outlet pipe is smaller than a preset flow or not based on the acquired flow signal;
if so, further judging whether the pressure of the water outlet pipe reaches the set drainage low pressure or not based on the acquired pressure signal;
if yes, controlling the multiple water pumps to start a first water pump according to a preset starting sequence according to the instruction of the scheduling unit, further judging whether the flow of the water outlet pipe continuously drops, and starting a second water pump according to the preset starting sequence until the multiple water pumps are all started.
7. The pump station intelligent drainage scheduling control system according to claim 6, wherein in the current limit mode, the control unit is further configured to:
judging whether the flow of the water outlet pipe is larger than a preset flow or not;
if so, controlling the multiple water pumps to shut down the first water pump according to a preset closing sequence according to the instruction of the scheduling unit, further judging whether the flow of the water outlet pipe continuously rises, and if so, shutting down the second water pump according to the preset closing sequence until the multiple water pumps are completely shut down.
8. The pump station intelligent drainage scheduling control system according to claim 1, wherein the mode selection unit is further configured with a plurality of middle mode interfaces, and the middle mode interfaces are used for acquiring a selection request of a user;
the control unit is further configured to:
establishing an energy-saving mode, a long-life mode and a high-efficiency mode corresponding to each middle-layer mode interface, and entering the corresponding energy-saving mode, long-life mode and high-efficiency mode based on a selection request of a user; wherein,
in the energy-saving mode, the control unit controls each water pump in the pump station to operate in a variable frequency mode according to the instruction of the scheduling unit based on the selected constant liquid level mode, the constant pressure mode or the current limiting mode, and obtains the energy efficiency coefficient of each water pump to start the water pump with high energy efficiency coefficient preferentially;
in the long-life mode, the control unit controls the running time of each water pump in the pump station to be the same according to the instruction of the scheduling unit;
in the high-efficiency mode, the control unit controls all water pumps in the pump station to run at power frequency or super frequency according to the instruction of the scheduling unit.
9. The pump station intelligent drainage scheduling control system according to claim 8, wherein the energy efficiency coefficient = time driving rate energy consumption performance index device quality index, wherein,
time on rate = actual run time/(actual run time + downtime);
energy consumption performance index = actual production rate per actual electricity per rated flow rate;
equipment quality index = equipment theoretical depreciation cost/(equipment theoretical depreciation cost + equipment maintenance repair cost).
10. The pump station intelligent drainage scheduling control system according to claim 8, wherein the data detection unit is further configured to obtain a flow signal of a local water collecting nano-tube in a single pump station;
the mode selection unit is also provided with a high-level mode interface, and the high-level mode interface is used for acquiring a selection request of a user;
the control unit is further configured to:
establishing an automatic mode corresponding to the high-level mode interface, and entering the corresponding automatic mode based on a selection request of a user; wherein,
in the automatic mode, the control unit judges whether the flow signal of the local water collecting storage pipe in the pump station is smaller than a preset reference value or not based on the flow signal of the local water collecting storage pipe in the pump station, and if so, the pump station is controlled to enter the energy-saving mode or the long-life mode; otherwise, if not, the pump station is controlled to enter the high-efficiency mode.
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