CN113669245A - Automatic control method and system for pump set accident shutdown of long-distance large-pipe-diameter water delivery pump station - Google Patents
Automatic control method and system for pump set accident shutdown of long-distance large-pipe-diameter water delivery pump station Download PDFInfo
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- CN113669245A CN113669245A CN202111110427.3A CN202111110427A CN113669245A CN 113669245 A CN113669245 A CN 113669245A CN 202111110427 A CN202111110427 A CN 202111110427A CN 113669245 A CN113669245 A CN 113669245A
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- 238000000034 method Methods 0.000 title claims abstract description 69
- 230000008569 process Effects 0.000 claims abstract description 47
- 230000009471 action Effects 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000010687 lubricating oil Substances 0.000 claims abstract description 9
- 238000012423 maintenance Methods 0.000 claims description 29
- 230000008034 disappearance Effects 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
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- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 10
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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Abstract
The invention discloses an automatic control method and system for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station, which comprises the following steps: detecting system signals such as motor bearing temperature, motor winding temperature, cooling equipment cold air temperature, mechanical rotating speed, pump set bearing temperature, pump set lubricating oil temperature and the like of pump station and pump set equipment, judging that a mechanical fault occurs in a system when any one or more mechanical system signals of the detected parameters such as the motor bearing temperature, the motor winding temperature and the like exceed a preset value, and controlling the system to automatically start a mechanical accident shutdown process; when any one or more conditions of main protection action of the motor, failure of a motor frequency converter and the like occur, an electrical accident of the system is judged, and the control system automatically starts an electrical accident shutdown process. According to the automatic control method, the pump group outlet working valve is closed by different processes according to corresponding conditions, so that the influence of water hammer on equipment can be effectively reduced, the condition that water in a pipeline cannot flow back to a pump station is ensured, and the pump group is prevented from reversing to damage equipment in a station.
Description
Technical Field
The invention discloses an accidental shutdown control method and system for a pump set of a water delivery and transfer pump station, and particularly relates to an automatic control method and an automatic control system for the accidental shutdown of the pump set of a long-distance large-pipe-diameter water delivery pump station.
Background
Long-distance large-pipe-diameter pipeline transportation business is not popular in China, and pipeline transportation is popular among more and more resource owners due to the advantages of energy conservation, environmental protection, low loss, balance and stability and the like. The pipeline transportation cost is lower than the road transportation cost, the requirement of continuous production of modern factories can be met, and the service life of the pipeline is 30 years, so the economic benefit is considerable. The pipeline transportation is an energy-saving emission-reducing and environment-friendly project actively popularized by the state at present, meets the national sustainable development requirement, and is a project supported by the national industrial policy. The pipeline transportation cost is greatly reduced compared with the road transportation cost, other expenses are not generated except the self operation cost of the pipeline transportation system, the pipeline transportation system implements the automation and flow control of the pipeline transportation system through each monitoring system, the pipeline transportation is carried out by adopting the automatic control flow, the labor intensity of the operating personnel and the labor intensity of a pump station is reduced, the safe operation level and the economic benefit of enterprises are improved, and the important measure of the cost is reduced, so the pipeline transportation system has a wide application prospect.
The design concept of large-scale water delivery and transfer projects is that water is taken from a low point, pressurized by a water pump and then delivered to a high point, and then automatically flows to a reservoir, so that in a water delivery and transfer system, the safety of a pipeline is particularly important, but pipeline explosion and pump set equipment damage accidents caused by automatic control and operation problems occur. Because of the water lifting pipeline is full flowing water state, when taking place electrical accident and mechanical accident, the valve can't be closed, the water in the pipeline will change the direction of motion promptly, fall backward rapidly from the high point, powerful water hammer will cause the harm or the pipe explosion phenomenon of water conveying and transfer system pipeline to equipment, can flow back the pump station suddenly at water lifting pipeline rivers simultaneously, thereby damage pump station pump package equipment and reduced pipeline water conveying and transfer system's stability and pipeline transport's work efficiency, whole water conveying and transfer system's life has been shortened.
Disclosure of Invention
The invention aims to: aiming at the problems that equipment in a pipeline is impacted by a water hammer and water flow of a water lifting pipeline suddenly flows back to a pump station to damage the equipment in the process of an accident when an electrical accident and a mechanical accident happen in the current large-scale water conveying and water transferring engineering, the automatic control method and the system for pump set accident shutdown of the long-distance large-pipe-diameter water conveying pump station are provided, the problem that the accident state of the long-distance water conveying pipeline with complex terrain is suddenly stopped to reduce the water hammer can be effectively solved, the pump set is timely and effectively stopped when the accident happens, so that the equipment is not damaged by the impact of the water hammer, and the safe, stable, efficient and economic operation of a pipeline water conveying and water transferring system is promoted.
The technical scheme of the invention is as follows:
the invention provides an automatic control method for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station, which comprises the following steps: detecting the temperature of a motor bearing, the temperature of a motor winding, the temperature of cold air of cooling equipment, the mechanical rotating speed, the temperature of a pump unit bearing, the temperature of lubricating oil of a pump unit, the vibration ferry parameter of the pump unit, whether a main protection action occurs on a motor, whether a motor frequency converter has a fault, a current or voltage signal and each system signal of the rotating speed of the pump unit; when any one or more system signals of detected motor bearing temperature, motor winding temperature, cooling equipment cold air temperature, mechanical rotating speed, pump set bearing temperature, pump set lubricating oil temperature and pump set vibration ferry parameters exceed preset values, judging that a mechanical fault occurs in the system, and controlling the system to automatically start a mechanical accident shutdown process; when any one or more conditions of main protection action of the motor, failure of a motor frequency converter, disappearance of current and voltage signals and 100% over-speed of pump set reverse rotation machinery occur, the system is judged to have an electrical accident, and the control system automatically starts an electrical accident shutdown process. By using the automatic control method, the working valve at the outlet of the pump group is closed by different processes according to corresponding conditions, the power supply of the motor is cut off, the influence of a water hammer on equipment is reduced, the water in the water lifting pipeline is ensured not to flow back to a pump station due to accidents, and the pump group is prevented from reversing and damaging equipment in the station.
Further, when any system signal of the motor bearing temperature, the motor winding temperature, the cooling equipment cold air temperature, the pump set bearing temperature, the pump set lubricating oil temperature and the pump set vibration ferry parameter exceeds a preset value, analyzing and judging within 1s and sending a mechanical accident starting and stopping flow signal; when the system signal shows that the mechanical rotating speed exceeds a preset value, judging and sending a mechanical accident starting and stopping flow signal within 100 ms; the mechanical accident shutdown process comprises the following steps: the hydraulic control valve, the motor and the pump set receive a signal for starting a mechanical accident shutdown process, the working valve at the outlet of the pump set is closed, the power supply of the motor is cut off, and the situation that water in the water lifting pipeline flows back to a pump station due to an accident is avoided. Because the water lifting pipeline is in a full-flow state, when a mechanical accident occurs to equipment, the conduction speed of a water hammer is high, the equipment needs to quickly react to the accident so as to achieve the purpose, the influence of the water hammer on the equipment is reduced, the water in the water lifting pipeline cannot flow back to a pump station due to the accident, the pump set is prevented from reversing, the effect of the equipment in a station is damaged, but the shorter the equipment reaction time is, the higher the requirement on the equipment is, thereby the construction and maintenance cost of a long-distance large-pipe-diameter water delivery pump station is increased, and therefore the construction and maintenance cost of the equipment can be effectively reduced by setting different reaction times according to the specific conditions of different mechanical equipment faults.
Furthermore, the mechanical accident shutdown process can be manually operated on site, and after the emergency stop button is operated on site, judgment is carried out within 500ms, and a signal for starting the mechanical accident shutdown process is sent. The terrain of pump set projects of the water delivery and transfer pump station with large distance and pipe diameter is complex, the complex accident condition that detection equipment is not considered is not avoided, and the field manual operation function is set.
Further, when any one of the conditions of the motor frequency converter failure, current and voltage signal disappearance and 100% overspeed of pump set reverse rotation machinery occurs in system signals, analyzing and judging the system signals within 100ms and sending signals for starting an electrical accident shutdown process; when the system signal displays that the main protection action of the motor occurs, the analysis and the judgment are carried out within 200ms, and a signal for starting the electric accident shutdown process is sent. Because the water lifting pipeline is in a full-flow state, when an electrical accident occurs to equipment, the conduction speed of a water hammer is high, the equipment needs to quickly react to the accident so as to achieve the purpose, the influence of the water hammer on the equipment is reduced, the situation that water in the water lifting pipeline flows back to a pump station due to the accident is ensured, the pump set is prevented from reversing, the effect of the equipment in a station is damaged, but the shorter the equipment reaction time is, the higher the requirement on the equipment is, thereby the construction and maintenance cost of a long-distance large-pipeline water delivery pump station is increased, and therefore the construction and maintenance cost of the equipment can be effectively reduced by setting different reaction times according to the specific conditions of different equipment faults.
Further, the electrical accident shutdown process comprises the following steps:
s1, sending an electric accident shutdown instruction by an upper machine station manual control button or a central control room public PLC according to judgment;
s2, receiving an electric accident shutdown instruction, closing a hydraulic control valve at a water outlet side, cutting off a power supply of the motor, and stopping the motor from running;
s3, closing an overhaul valve at the water outlet side;
s4, starting to close the rear limit time of the maintenance valve at the water outlet side for 60s, and if the hydraulic control valve is completely closed, starting to confirm whether the incoming cabinet breaker is opened or not; if the hydraulic control valve and the maintenance valve are both failed to be closed completely, the automatic process is quitted, and after the hydraulic control valve and the maintenance valve are adjusted and closed manually, whether the incoming line cabinet breaker is opened or not is determined;
s5, if the circuit breaker of the inlet cabinet is detected to be opened, the rotating speed of the pump set motor is reduced to be less than 5% of the rated rotating speed within 120S; if the fact that the incoming line cabinet breaker is not opened is detected, manual inspection processing is immediately carried out;
s6, the rotating speed of the pump set motor is reduced to below 5% of the rated rotating speed on time until the pump set motor stops completely, and the shutdown is finished; and if the rotating speed of the pump set motor exceeds 120s and the rotating speed of the pump set motor is not reduced to be lower than 5% of the rated rotating speed, the emergency flow is continued until the pump set motor is completely stopped. The process can effectively avoid the pump failure water hammer of the pump set in the full water state when the water lifting pipeline is stopped due to an accident, prevent water in the water lifting pipeline from flowing back to the pump station, and simultaneously cut off the power supply of the motor according to the related process, ensure that water in the water lifting pipeline cannot flow back to the pump station due to the accident, prevent the pump set from reversing and damage equipment in the station.
The invention provides an automatic control system for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station, which comprises an information layer, a control layer and an equipment layer, wherein the information layer is used for storing the control layer; the information layer is provided with an upper computer which is responsible for collecting and centrally controlling the production data of the whole pump station; the control layer collects signals of a field device operation system of the device layer and monitors the field device, and the control layer automatically controls, analyzes, judges and processes the signals of the field device operation system and is completed by a common PLC control cabinet arranged in a control room in the control layer; the system collects three types of system signals including accident amount, state amount and remote signals from an equipment layer and accesses the system signals to an upper computer.
Further, a device layer packet execution device and a detection device; the execution device includes: motor, pump package, liquid accuse valve, maintenance valve, inlet wire cabinet circuit breaker, check out test set includes: pressure gauge, flowmeter, thermometer, vibration monitor probe, throw monitor probe and fluviograph.
Further, the accident amount includes: the system comprises a pump set main protection action signal, a pump station frequency converter outlet cabinet protection action signal, a motor main protection device fault signal, a motor backup protection device fault signal, a frequency converter outlet cabinet protection device fault signal, a frequency converter fault signal, a pump set lubrication water supply pump fault signal, a pump set inlet side electric valve fault signal, a pump set outlet side hydraulic control valve fault signal, a pump set outlet side maintenance valve fault signal, a pump set temperature fault signal, a pump set pressure fault signal, a pump set vibration fault signal and a pump station swing fault signal.
Further, the state quantities include: the method comprises the following steps that a frequency converter outlet cabinet circuit breaker is in a switch-on position, a pump group inlet side electric valve is in a full-open position, a pump group outlet side working valve is in a full-open position, a pump group outlet side hydraulic control valve is in a full-open position, the pump group inlet side pressure reaches a setting value, the pressure behind the hydraulic control valve reaches the setting value, a frequency converter outlet cabinet circuit breaker spring is stored with energy, and a pump group outlet cabinet circuit breaker spring is stored with energy.
Further, the distant signal includes: the electric valve at the water inlet side of the pump unit is controlled at a remote position, and the maintenance valve at the water outlet side of the pump unit is controlled at a remote position; the pump group outlet side hydraulic control valve is controlled at a remote position, the pump group frequency converter is controlled at a remote position, the frequency converter outlet cabinet circuit breaker is controlled at a remote position, the pump group outlet cabinet circuit breaker is controlled at a remote position and the pump group outlet cabinet grounding switch tripping position.
Compared with the prior art, the invention has the beneficial effects that:
1. the technical problem that the pipeline water hammer damages equipment when the water lifting pipeline of the pump set is in a full water state and electrical accidents and mechanical accidents occur suddenly in the operation process is effectively solved, and the effective protection of the pipeline and the pump set equipment is realized.
2. When electrical accidents and mechanical accidents occur in the water delivery and transfer system, pipe explosion and equipment damage accidents of the pipeline are effectively prevented, and the safety of a pipe network system is effectively ensured.
3. The water pump set effectively prevents the situation that when an electrical accident and a mechanical accident happen to the water delivery and transfer system, water in the water lifting pipeline flows back to the pump station due to the accident, the pump set rotates reversely, and equipment in the station is damaged.
4. Because the water lifting pipeline is in a full-flow state, when an electrical accident and a mechanical accident happen to equipment, the conduction speed of a water hammer is high, the equipment needs to quickly react to the accident so as to achieve the purpose, the influence of the water hammer on the equipment is reduced, the situation that water in the water lifting pipeline flows back to a pump station due to the accident is guaranteed, the pump set is prevented from reversing, the effect of the equipment in a station is damaged, but the shorter the equipment reaction time is, the higher the requirement on the equipment is, the construction and maintenance cost of a long-distance large-pipe-diameter water delivery pump station is increased, and therefore the construction and maintenance cost of the equipment can be effectively reduced by setting different reaction times according to the specific conditions of different equipment faults.
4. The stability of pipeline water delivery and transfer system and the work efficiency of pipeline transport have been improved, the life of extension pipeline has improved the economic benefits of water delivery and transfer.
Drawings
FIG. 1 is a schematic view of an automatic pump set shutdown control system for a long-distance large-pipe-diameter water delivery pump station
FIG. 2 is a layout diagram of mechanical equipment of an automatic pump set shutdown control system of a long-distance large-pipe-diameter water delivery pump station
FIG. 3 is a mechanical accident shutdown flow chart of an automatic control method for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station
FIG. 4 is an electrical accident shutdown flow chart of an automatic control method for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station
Detailed Description
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
As shown in fig. 1 and 2, the control system adopts a layered control structure, and is divided into three information layers, a control layer and an equipment layer, wherein the information layers are located in a central control room, and a graphical interface of the whole monitoring system, a monitoring data report and the like are designed and completed by using (intuuch) configuration software. The system can collect and centrally control production data of the whole pump station, is provided with 2 upper computers (one of an engineer station and an operator station) and relevant printers and an Uninterruptible Power Supply (UPS), and is connected with a PLC (programmable logic controller) substation through an Ethernet; and is connected with the power monitoring system of the whole pump station. The control layer is composed of a public PLC and a field LCU (real-time monitoring and control of the operation condition of a controlled object). The system is responsible for collecting data of field instruments and monitoring field equipment. The PLC main station is connected with the upper computer and the remote IO sub-station through the Ethernet. The device layer includes mechanical devices, electrical devices, and detection device height. The mechanical equipment comprises a water pump, a water inlet side electric valve, a water outlet side hydraulic control valve, a water outlet side maintenance valve, a flow control valve waterproof hammer air valve, a pressure fluctuation prevention valve (namely the water hammer prevention valve) and a pressure fluctuation prevention maintenance ball valve. The electrical equipment comprises a 10kV motor, a frequency converter incoming cabinet, a water pump motor incoming cabinet, a frequency converter, a pump set online monitoring cabinet (which monitors parameters such as vibration, temperature and swing degree of a pump station in real time and sends out alarm and danger signals), an on-site water pump control cabinet (which collects and judges various electrical protection signals and online monitoring signals and automatically controls the pump station) and a motor protection cabinet. The detection device comprises: the device comprises field equipment such as a pressure switch cabinet, a frequency converter (soft starter), a water pump, a motor, a valve, a pressure gauge, a flowmeter, a thermometer, a vibration monitoring probe, a swing monitoring probe, a water level meter and the like.
The system signals such as fault quantity, state quantity and remote signals collected at the equipment layer are accessed to the upper computer, and the control flow is used for carrying out automatic control analysis, judgment and processing, so that the equipment is protected from being damaged by water hammer impact when a pump group breaks down. The fault quantity comprises a pump group main protection action signal; a pump station frequency converter (soft starter) outlet cabinet protection action signal; a motor main protection device fault signal; a motor backup protection device fault signal; fault signals of a protection device of a wire outlet cabinet of a frequency converter (a soft starter); frequency converter (soft starter) fault signal; a pump set lubrication water supply pump fault signal; a fault signal of an electric valve at the water inlet side of the pump group is sent; a fault signal of a hydraulic control valve at the water outlet side of the pump set; a pump set water outlet side maintenance valve fault signal; a pump set temperature fault signal; pump set pressure fault signal, pump set vibration fault signal, pump station throw fault signal.
The state quantity comprises the closing position of a breaker of an outgoing line cabinet of a frequency converter (a soft starter); the switching-on position of a circuit breaker of the pump outlet cabinet; the electric valve at the water inlet side of the pump set is in a full-open position; the pump set water outlet side working valve is in a full-open position; the hydraulic control valve at the water outlet side of the pump set is at the full-open position; the water inlet side pressure of the pump group reaches a setting value; the back pressure of the hydraulic control valve reaches a setting value; the circuit breaker spring of the outgoing line cabinet of the frequency converter (soft starter) has stored energy; the pump outlet cabinet breaker spring has stored energy.
The remote signal comprises that the electric valve at the water inlet side of the pump group is controlled at a remote position; the maintenance valve at the water outlet side of the pump set is controlled at a remote position; the hydraulic control valve at the water outlet side of the pump unit is controlled at a remote position; the pump set frequency converter (soft starter) is controlled at a remote position; the breaker of the outgoing line cabinet of the frequency converter (soft starter) is controlled at a remote position; the pump outlet cabinet circuit breaker is in a remote position; and the pump unit outlet cabinet grounding switch opening position.
As shown in fig. 3, when any one or more system signals of detected motor bearing temperature, motor winding temperature, cooling equipment cold air temperature, mechanical rotating speed, pump set bearing temperature, pump set lubricating oil temperature and pump set vibration ferry parameters exceed preset values, judging that a mechanical fault occurs in the system, and controlling the system to automatically start a mechanical accident shutdown process; when any one or more conditions of main protection action of the motor, failure of a motor frequency converter, disappearance of current and voltage signals and 100% over-speed of pump set reverse rotation machinery occur, the system is judged to have an electrical accident, and the control system automatically starts an electrical accident shutdown process. By using the automatic control method, the working valve at the outlet of the pump group is closed by different processes according to corresponding conditions, the power supply of the motor is cut off, the influence of a water hammer on equipment is reduced, the water in the water lifting pipeline is ensured not to flow back to a pump station due to accidents, and the pump group is prevented from reversing and damaging equipment in the station.
In the mechanical accident starting and stopping process, when any system signal of the motor bearing temperature, the motor winding temperature, the cooling equipment cold air temperature, the pump group bearing temperature, the pump group lubricating oil temperature and the pump group vibration ferry parameter exceeds a preset value, analyzing and judging within 1s and sending a mechanical accident starting and stopping process starting signal; when the system signal shows that the mechanical rotating speed exceeds a preset value, judging and sending a mechanical accident starting and stopping flow signal within 100 ms; the mechanical accident shutdown process comprises the following steps: the hydraulic control valve, the motor and the pump set receive a signal for starting a mechanical accident shutdown process, the working valve at the outlet of the pump set is closed, the power supply of the motor is cut off, and the situation that water in the water lifting pipeline flows back to a pump station due to an accident is avoided. Because the water lifting pipeline is in a full-flow state, when a mechanical accident occurs to equipment, the conduction speed of a water hammer is high, the equipment needs to quickly react to the accident so as to achieve the purpose, the influence of the water hammer on the equipment is reduced, the water in the water lifting pipeline cannot flow back to a pump station due to the accident, the pump set is prevented from reversing, the effect of the equipment in a station is damaged, but the shorter the equipment reaction time is, the higher the requirement on the equipment is, thereby the construction and maintenance cost of a long-distance large-pipe-diameter water delivery pump station is increased, and therefore the construction and maintenance cost of the equipment can be effectively reduced by setting different reaction times according to the specific conditions of different mechanical equipment faults.
As shown in fig. 4, when any one or more of the main protection action of the motor, the failure of the frequency converter of the motor, the disappearance of current and voltage signals and the 100% overspeed of the reverse rotation machinery of the pump set occur, the system is judged to have an electrical accident, and the control system automatically starts the electrical accident shutdown process.
In the mechanical accident starting and stopping process, when any one of the conditions of a motor frequency converter failure, current and voltage signal disappearance and 100% overspeed of pump set reverse rotation machinery appears in a system signal, analyzing and judging within 100ms and sending a signal for starting the electrical accident stopping process; when the system signal displays that the main protection action of the motor occurs, the analysis and the judgment are carried out within 200ms, and a signal for starting the electric accident shutdown process is sent. Different reaction times are set according to different specific conditions of electrical equipment faults, so that the construction and maintenance cost of the equipment can be effectively reduced.
The electric accident shutdown process comprises the following steps: 1. a manual control button of the boarding position or a common PLC of the central control room generates an electric accident shutdown instruction according to judgment; 2. receiving an electric accident shutdown instruction, closing a hydraulic control valve at the water outlet side, cutting off the power supply of the motor, and stopping the motor from running; 3. closing the maintenance valve at the water outlet side; 4. the rear limit time of the maintenance valve on the water outlet side is started to be closed for 60s, and if the hydraulic control valve is completely closed, whether the incoming cabinet circuit breaker is opened or not is started to be confirmed; if the hydraulic control valve and the maintenance valve are both failed to be closed completely, the automatic process is quitted, and after the hydraulic control valve and the maintenance valve are adjusted and closed manually, whether the incoming line cabinet breaker is opened or not is determined; 5, if the circuit breaker of the incoming line cabinet is detected to be opened, the rotating speed of a pump set motor is reduced to be below 5% of the rated rotating speed within 120 s; if the fact that the incoming line cabinet breaker is not opened is detected, manual inspection processing is immediately carried out; 6, the rotating speed of the motor of the pump set is reduced to be below 5% of the rated rotating speed on time until the motor stops completely, and the shutdown is finished; and if the rotating speed of the pump set motor exceeds 120s and the rotating speed of the pump set motor is not reduced to be lower than 5% of the rated rotating speed, the emergency flow is continued until the pump set motor is completely stopped. The process can effectively avoid the pump failure water hammer of the pump set in the full water state when the water lifting pipeline is stopped due to an accident, prevent water in the water lifting pipeline from flowing back to the pump station, and simultaneously cut off the power supply of the motor according to the related process, ensure that water in the water lifting pipeline cannot flow back to the pump station due to the accident, prevent the pump set from reversing and damage equipment in the station.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (10)
1. An automatic control method for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station is characterized by comprising the following steps: detecting the temperature of a motor bearing, the temperature of a motor winding, the temperature of cold air of cooling equipment, the mechanical rotating speed, the temperature of a pump unit bearing, the temperature of lubricating oil of a pump unit, the vibration ferry parameter of the pump unit, whether a main protection action occurs on a motor, whether a motor frequency converter has a fault, a current or voltage signal and each system signal of the rotating speed of the pump unit; when any one or more system signals of detected motor bearing temperature, motor winding temperature, cooling equipment cold air temperature, mechanical rotating speed, pump set bearing temperature, pump set lubricating oil temperature and pump set vibration ferry parameters exceed preset values, judging that a mechanical fault occurs in the system, and controlling the system to automatically start a mechanical accident shutdown process; when any one or more conditions of main protection action of the motor, failure of a motor frequency converter, disappearance of current and voltage signals and 100% over-speed of pump set reverse rotation machinery occur, the system is judged to have an electrical accident, and the control system automatically starts an electrical accident shutdown process.
2. The automatic control method for pump group emergency shutdown of the long-distance large-pipe-diameter water delivery pump station according to claim 1, characterized in that when any system signal of motor bearing temperature, motor winding temperature, cooling equipment cold air temperature, pump group bearing temperature, pump group lubricating oil temperature and pump group vibration ferry parameter exceeds a preset value, the analysis and judgment are carried out within 1s and a mechanical emergency shutdown starting flow signal is sent; when the system signal shows that the mechanical rotating speed exceeds a preset value, judging and sending a mechanical accident starting and stopping flow signal within 100 ms; the mechanical accident shutdown process comprises the following steps: the hydraulic control valve, the motor and the pump set receive a signal for starting a mechanical accident shutdown process, the working valve at the outlet of the pump set is closed, the power supply of the motor is cut off, and the situation that water in the water lifting pipeline flows back to a pump station due to an accident is avoided.
3. The automatic control method for the pump unit emergency shutdown of the long-distance large-pipe-diameter water delivery pump station according to claim 2, wherein the mechanical emergency shutdown process can be manually operated on site, and after an emergency shutdown button is operated on site, judgment is performed within 500ms and a signal for starting the mechanical emergency shutdown process is sent.
4. The automatic control method for pump set accident shutdown of the long-distance large-pipe-diameter water delivery pump station according to claim 1, characterized in that when any one of a motor frequency converter, a current and voltage signal, and a pump set reverse rotation machinery 100% overspeed occurs in a system signal, the analysis and the judgment are carried out within 100ms, and an electric accident shutdown starting flow signal is sent; when the system signal displays that the main protection action of the motor occurs, the analysis and the judgment are carried out within 200ms, and a signal for starting the electric accident shutdown process is sent.
5. The automatic control method for the pump set accident shutdown of the long-distance large-pipe-diameter water delivery pump station according to claim 4, wherein the electric accident shutdown process comprises the following steps:
s1, sending an electric accident shutdown instruction by an upper machine station manual control button or a central control room public PLC according to judgment;
s2, receiving an electric accident shutdown instruction, closing a hydraulic control valve at a water outlet side, cutting off a power supply of the motor, and stopping the motor from running;
s3, closing an overhaul valve at the water outlet side;
s4, starting to close the rear limit time of the maintenance valve at the water outlet side for 60s, and if the hydraulic control valve is completely closed, starting to confirm whether the incoming cabinet breaker is opened or not; if the hydraulic control valve and the maintenance valve are both failed to be closed completely, the automatic process is quitted, and after the hydraulic control valve and the maintenance valve are adjusted and closed manually, whether the incoming line cabinet breaker is opened or not is determined;
s5, if the circuit breaker of the inlet cabinet is detected to be opened, the rotating speed of the pump set motor is reduced to be less than 5% of the rated rotating speed within 120S; if the fact that the incoming line cabinet breaker is not opened is detected, manual inspection processing is immediately carried out;
s6, the rotating speed of the pump set motor is reduced to below 5% of the rated rotating speed on time until the pump set motor stops completely, and the shutdown is finished; and if the rotating speed of the pump set motor exceeds 120s and the rotating speed of the pump set motor is not reduced to be lower than 5% of the rated rotating speed, the emergency flow is continued until the pump set motor is completely stopped.
6. An automatic control system for pump set accident shutdown of a long-distance large-pipe-diameter water delivery pump station is characterized by comprising an information layer, a control layer and an equipment layer; the information layer is provided with an upper computer which is responsible for collecting and centrally controlling the production data of the whole pump station; the control layer collects signals of a field device operation system of the device layer and monitors the field device, and the control layer automatically controls, analyzes, judges and processes the signals of the field device operation system and is completed by a common PLC control cabinet arranged in a control room in the control layer; the system collects three types of system signals including accident amount, state amount and remote signals from an equipment layer and accesses the system signals to an upper computer.
7. The automatic control system for pump set accident shutdown of the long-distance large-pipeline water delivery pump station according to claim 6, characterized in that the equipment layer comprises an execution device and a detection device; the execution device includes: motor, pump package, liquid accuse valve, maintenance valve, inlet wire cabinet circuit breaker, check out test set includes: pressure gauge, flowmeter, thermometer, vibration monitor probe, throw monitor probe and fluviograph.
8. The system according to claim 7, wherein the accident amount comprises: the system comprises a pump set main protection action signal, a pump station frequency converter outlet cabinet protection action signal, a motor main protection device fault signal, a motor backup protection device fault signal, a frequency converter outlet cabinet protection device fault signal, a frequency converter fault signal, a pump set lubrication water supply pump fault signal, a pump set inlet side electric valve fault signal, a pump set outlet side hydraulic control valve fault signal, a pump set outlet side maintenance valve fault signal, a pump set temperature fault signal, a pump set pressure fault signal, a pump set vibration fault signal and a pump station swing fault signal.
9. The automatic control system for pump set accidental shutdown of the long-distance large-pipe-diameter water delivery pump station according to claim 7, wherein the state quantity comprises: the method comprises the following steps that a frequency converter outlet cabinet circuit breaker is in a switch-on position, a pump group inlet side electric valve is in a full-open position, a pump group outlet side working valve is in a full-open position, a pump group outlet side hydraulic control valve is in a full-open position, the pump group inlet side pressure reaches a setting value, the pressure behind the hydraulic control valve reaches the setting value, a frequency converter outlet cabinet circuit breaker spring is stored with energy, and a pump group outlet cabinet circuit breaker spring is stored with energy.
10. The system according to claim 7, wherein the remote signal comprises: the electric valve at the water inlet side of the pump unit is controlled at a remote position, and the maintenance valve at the water outlet side of the pump unit is controlled at a remote position; the pump group outlet side hydraulic control valve is controlled at a remote position, the pump group frequency converter is controlled at a remote position, the frequency converter outlet cabinet circuit breaker is controlled at a remote position, the pump group outlet cabinet circuit breaker is controlled at a remote position and the pump group outlet cabinet grounding switch tripping position.
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| CN202111110427.3A CN113669245A (en) | 2021-09-23 | 2021-09-23 | Automatic control method and system for pump set accident shutdown of long-distance large-pipe-diameter water delivery pump station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115343994A (en) * | 2022-08-22 | 2022-11-15 | 深圳市中电电力技术股份有限公司 | Device control system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430358A (en) * | 2008-12-10 | 2009-05-13 | 河南国网宝泉抽水蓄能有限公司 | Head-machine first water pump behavior full-group start test method for pump storage plant |
| RU2551139C1 (en) * | 2013-11-21 | 2015-05-20 | Государственное бюджетное образовательное учреждение высшего профессионального образования "Альметьевский государственный нефтяной институт" | Pump station electric drive automatic control method |
| CN112096623A (en) * | 2020-09-25 | 2020-12-18 | 云南大红山管道有限公司 | Automatic shutdown control method for pump set of long-distance large-pipe-diameter pipeline water delivery pump station |
| CN112196783A (en) * | 2020-10-15 | 2021-01-08 | 云南大红山管道有限公司 | Automatic control starting method for pump set of long-distance large-pipe-diameter water delivery and transfer pump station |
-
2021
- 2021-09-23 CN CN202111110427.3A patent/CN113669245A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430358A (en) * | 2008-12-10 | 2009-05-13 | 河南国网宝泉抽水蓄能有限公司 | Head-machine first water pump behavior full-group start test method for pump storage plant |
| RU2551139C1 (en) * | 2013-11-21 | 2015-05-20 | Государственное бюджетное образовательное учреждение высшего профессионального образования "Альметьевский государственный нефтяной институт" | Pump station electric drive automatic control method |
| CN112096623A (en) * | 2020-09-25 | 2020-12-18 | 云南大红山管道有限公司 | Automatic shutdown control method for pump set of long-distance large-pipe-diameter pipeline water delivery pump station |
| CN112196783A (en) * | 2020-10-15 | 2021-01-08 | 云南大红山管道有限公司 | Automatic control starting method for pump set of long-distance large-pipe-diameter water delivery and transfer pump station |
Non-Patent Citations (1)
| Title |
|---|
| 苏兆景等: "邦山泵站计算机监控***设计", 《机电信息》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115343994A (en) * | 2022-08-22 | 2022-11-15 | 深圳市中电电力技术股份有限公司 | Device control system and method |
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Application publication date: 20211119 |