CN107327397A - A kind of electric-control system for being used to monitoring, being lifted submersible pump starting performance - Google Patents
A kind of electric-control system for being used to monitoring, being lifted submersible pump starting performance Download PDFInfo
- Publication number
- CN107327397A CN107327397A CN201710758704.9A CN201710758704A CN107327397A CN 107327397 A CN107327397 A CN 107327397A CN 201710758704 A CN201710758704 A CN 201710758704A CN 107327397 A CN107327397 A CN 107327397A
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- CN
- China
- Prior art keywords
- submersible pump
- controller
- electric
- control system
- starting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- F04B49/06—Control using electricity
Abstract
The present invention relates to the control of the starting process of submersible pump, it is in submersible pump starting process, when the starting torque of submersible pump is close to load resistance square, during the starting difficulty of submersible pump, the electric capacity of matching is put into along polarity in the loop, is allowed to and the submersible pump one approximate LC oscillation circuits of formation under starting state, the voltage of raising motor receiving end, to overcome load resistance square, the safe starting of motor is realized.The present invention is by the improvement to traditional startup mode, while the starting torque of lifting motor, operation safety of the effective guarantee for transformer.
Description
Technical field
It is more particularly to a kind of to be used to monitor, be lifted the present invention relates to a kind of control system started for submersible pump
The electric-control system of submersible pump starting performance.
Background technology
At present, the existing submersible pump start mode that is commonly used for of in the market is divided into two major classes：One class is across-the-line starting.This
Plant start mode and start 4 times of capacity more than submersible pump rated capacity for generally requiring transformer, otherwise when the electricity on circuit
When stream exceedes the current limit that transformer allows, the tripping operation of transformer can be caused, it is impossible to smoothly start.In the operation of submersible pump
Occasion is typically all difficult to meet, and particularly powerful submersible pump reaches that this requirement is more difficult.
Equations of The Second Kind is reduced voltage starting, and traditional reduced voltage starting mode is divided into three kinds：The first is stator string resistance or reactance
Start；Second is Auto-start relief transformer；The third is soft starter reduced voltage starting.
The characteristics of three of the above start mode has common, that is, reduce the voltage of submersible pump receiving end, therefore exist
It is following not enough：The landing of voltage in starting process of submersible pump adapted motor can cause being greatly reduced for its starting torque,
From the characteristic of motor：The first power landing of voltage can cause the quadratic power of motor starting torque to reduce.Submersible pump
Typical start performance curve is shown in Fig. 1, wherein：Ist/IN--rated voltage dive water power pump starting current times；Ist’/
INSubmersible pump starting current times after-- decompression； Tst/TN--rated voltage dive water power pumps up dynamic torque multiple；
Tst’/TNSubmersible pump starting torque multiple after-- decompression；Tp/TN--load water pump moment of resistance multiple；S-- diving electricity
The revolutional slip of pump adapted motor.
Known by Fig. 1：When the starting performance curve of submersible pump intersects at A points with load water pump damping moment curve, i.e.,
When the starting torque of motor is less than the moment of resistance of water pump, now rotating speed can be stopped at this moment motor, and motor sends " drone
Drone " sound, rotating speed no longer rises, it is impossible to up to rated speed.Now motor starting does not get up, starting failure.
The content of the invention
The purpose of patent of the present invention is exactly, in order to solve the deficiency in above-mentioned technology, and to provide a kind of monitoring, lifting diving
The electric-control system 2 of electric pump starting performance, such a electric-control system 2 makes the starting performance of submersible pump 1 be greatly improved,
While not influenceing 4 riding quality of power network, the starting torque of submersible pump 1 is improved, the smooth starting of submersible pump 1 is ensured,
And after the completion of starting process, rational switching capacitance 5 arrives the operational mode of submersible pump 1.Improve the fortune of transformer 3
The starting reliability of row security and submersible pump.
In order to achieve the above object, the technical solution adopted by the present invention is：One kind monitoring, lifting submersible pump starting performance
Electric-control system：In the starting process of submersible pump 1, turned by installing motor on the rotor of the adapted motor of submersible pump 1
Fast velometer, is monitored to the acceleration of its rotating speed, when detecting this value less than a certain fixed value, that is, means diving electricity
The starting torque of pump 1 is close to load resistance square, it is therefore foreseen that the starting difficulty of submersible pump 1.Spy when being started according to submersible pump 1
Property, its power factor≤0.2 can now be approximately considered the motor of submersible pump adapted for perception, then put into the loop
The electric capacity 6 of matching, forms an approximate LC oscillation circuits, while electric capacity 6 must be put under the conditions of along polarity phase, it is ensured that electric capacity 6
Discharge condition, to improve the voltage of the receiving end of submersible pump 1, that is, improves the starting torque of the submersible pump 1, to overcome water load
The pump moment of resistance, realizes the safe starting of submersible pump 1.After the completion of starting process, timely and effective switch-capacitor 6, it is ensured that power network 4
Operation safety.
Survey rotation speed change device in above-mentioned electric-control system, using in magnetoelectric transducer, tachometer generator, rotary encoder
It is any, on the rotor of adapted motor.
The electric capacity 6 matched in above-mentioned electric-control system is the starting performance according to motor, calculates inductance, then reasonable computation
With the capacitance matched, an approximate LC oscillation circuits are formed.
Refer to the state that electric capacity 6 discharges in this approximate LC oscillation circuit along polarity phase in above-mentioned electric-control system.
Submersible pump receiving end refers to the B points in the cable outlet end of submersible pump, i.e. Fig. 2 in above-mentioned electric-control system.
Above-mentioned electric-control system is controlled by controller 10.
Technical scheme more than, the beneficial effect of patent of the present invention：
Electric-control system improves the starting torque of submersible pump 1, more than its load resistance square, improves submersible pump starting
Reliability.Electric-control system utilizes LC oscillation circuit principles, and the resistance of load water pump can not be overcome in the starting torque of submersible pump 1
During square, the voltage of submersible pump receiving end B points is lifted, so that the starting torque of submersible pump 1 is improved, for overcoming load water pump
The moment of resistance, reach the effect of the safe and reliable starting of submersible pump 1.
Brief description of the drawings：
Fig. 1 is submersible pump Typical start performance curve and load water pump damping moment curve；
Fig. 2 is patent of the present invention location drawing in power network；
Wherein：1 submersible pump, 2 monitorings, the electric-control system of lifting submersible pump starting performance, 3 transformers, 4 power supply electricity
Net, 5 switching capacitance controllers, 6 matching capacitances, 7 soft initiators, 8 comprehensive protection devices, 9 motor speed velometers, 10 controllers.
Embodiment
Following examples are used to illustrate the present invention, but can not be used for limiting the scope of the present invention.The reality used in embodiment
The condition of applying can be for further adjustments according to the condition of producer, and unaccounted implementation condition is usually conventional laboratory conditions.
Embodiment
A kind of electric-control system for being used to monitoring, being lifted submersible pump starting performance, including power supply grid 4, transformer 3, throw
Capacitance controller 5 is cut, matching capacitance 6, submersible pump 1, motor speed velometer 9, controller 10, the controller can be calculated
The differential value dn/dt of rotating speed acceleration, when the differential value of rotating speed acceleration is less than definite value C, controller starts switching electricity
Hold controller, matching capacitance is put into loop under the conditions of along polarity phase, after submersible pump start completion, controller breaks
Switching capacitance controller switches are opened, the definite value C is the value of motor load resistive torque.
Specifically, the electric-control system also includes soft initiator 7, and comprehensive protection device 8, the soft initiator is arranged at transformation
After device, before switching capacitance controller, the comprehensive protection device, which is arranged at, to be cut after capacitance controller, before submersible pump.
Specifically, the motor speed velometer is any in magnetoelectric transducer, tachometer generator, rotary encoder
Kind, installation position is on the rotor of adapted motor.
Specifically, the controller is dsp controller.
Operation principle：When in the starting process of submersible pump 1, being monitored to the micro component dn/dt of its rotating speed acceleration, when
When monitoring that this amount is less than certain value C, C is the value of motor load resistive torque, i.e. dn/dt<C, represents now submersible pump 1
Torque starts difficult, in the loop along polarity input by calculating and this submersible pump already close to load water pump resistive torque
The electric capacity 6 of matching, the now electric current increase in approximate LC oscillation circuits, the receiving end B points voltage of submersible pump 1 rises, according to latent
The characteristic of the adapted motor of water power pump 1, receiving end B points voltage linear rises, and can make the upper of the starting torque quadratic power of submersible pump 1
Rise, so that the starting torque of submersible pump 1 is improved, to overcome the load water pump moment of resistance, while can ensure in higher level supply line
Electric current do not increase, to ensure the safe operation of supply transformer 3, after submersible pump start completion, controller disconnect switching
Capacitance controller is switched.
Claims (4)
1. a kind of electric-control system for being used to monitoring, being lifted submersible pump starting performance, it is characterised in that：Including power supply grid, become
Depressor, switching capacitance controller, matching capacitance, submersible pump, motor speed velometer, controller, the controller can be calculated
Go out the differential value dn/dt of rotating speed acceleration, when the differential value of rotating speed acceleration is less than definite value C, controller starts switching
Capacitance controller, matching capacitance is put into loop under the conditions of along polarity phase, after submersible pump start completion, controller
Switching capacitance controller switches are disconnected, the definite value C is the value of motor load resistive torque.
2. a kind of electric-control system for monitoring, being lifted submersible pump starting performance according to claim 1, its feature
It is：The electric-control system also includes soft initiator, and comprehensive protection device, the soft initiator is arranged at after transformer, switching electricity
Hold before controller, the comprehensive protection device, which is arranged at, to be cut after capacitance controller, before submersible pump.
3. a kind of electric-control system for monitoring, being lifted submersible pump starting performance according to claim 1, its feature
It is：The motor speed velometer is any of magnetoelectric transducer, tachometer generator, rotary encoder, installation position
On rotor for adapted motor.
4. a kind of electric-control system for monitoring, being lifted submersible pump starting performance according to claim 1, its feature
It is：The controller is dsp controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758704.9A CN107327397B (en) | 2017-08-29 | 2017-08-29 | Electric control system for monitoring and improving starting performance of submersible electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758704.9A CN107327397B (en) | 2017-08-29 | 2017-08-29 | Electric control system for monitoring and improving starting performance of submersible electric pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107327397A true CN107327397A (en) | 2017-11-07 |
| CN107327397B CN107327397B (en) | 2021-06-01 |
Family
ID=60203923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710758704.9A Active CN107327397B (en) | 2017-08-29 | 2017-08-29 | Electric control system for monitoring and improving starting performance of submersible electric pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107327397B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879392A (en) * | 2018-07-26 | 2018-11-23 | 江苏银佳电气设备有限公司 | A kind of 10kV high-pressure immersed electromotor monitoring switching cabinet |
| CN111692088A (en) * | 2020-05-21 | 2020-09-22 | 钦州绿传科技有限公司 | Diagnosis and control method for preventing electronic oil pump from failing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151091A (en) * | 1983-11-07 | 1985-07-10 | Pfeiffer Vakuumtechnik | Electric drive for oil sealed sliding vane rotary vacuum pump |
| JPS62207192A (en) * | 1986-03-04 | 1987-09-11 | Nippon Denso Co Ltd | Chopper device for dc motor |
| CN1132961A (en) * | 1994-08-31 | 1996-10-09 | 三菱电机株式会社 | Single-phase induction motor and refrigerator using single-phase induction motor |
| CN2285376Y (en) * | 1996-11-22 | 1998-07-01 | 庞春龙 | Regenerative starter for air conditioner compressor |
| CN101361244A (en) * | 2006-01-20 | 2009-02-04 | 开利公司 | Electronic method for starting compressor |
| CN207377784U (en) * | 2017-08-29 | 2018-05-18 | 合肥恒大江海泵业股份有限公司 | A kind of electric-control system for being used to monitoring, being promoted submersible pump startability |
-
2017
- 2017-08-29 CN CN201710758704.9A patent/CN107327397B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151091A (en) * | 1983-11-07 | 1985-07-10 | Pfeiffer Vakuumtechnik | Electric drive for oil sealed sliding vane rotary vacuum pump |
| JPS62207192A (en) * | 1986-03-04 | 1987-09-11 | Nippon Denso Co Ltd | Chopper device for dc motor |
| CN1132961A (en) * | 1994-08-31 | 1996-10-09 | 三菱电机株式会社 | Single-phase induction motor and refrigerator using single-phase induction motor |
| CN2285376Y (en) * | 1996-11-22 | 1998-07-01 | 庞春龙 | Regenerative starter for air conditioner compressor |
| CN101361244A (en) * | 2006-01-20 | 2009-02-04 | 开利公司 | Electronic method for starting compressor |
| CN207377784U (en) * | 2017-08-29 | 2018-05-18 | 合肥恒大江海泵业股份有限公司 | A kind of electric-control system for being used to monitoring, being promoted submersible pump startability |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879392A (en) * | 2018-07-26 | 2018-11-23 | 江苏银佳电气设备有限公司 | A kind of 10kV high-pressure immersed electromotor monitoring switching cabinet |
| CN111692088A (en) * | 2020-05-21 | 2020-09-22 | 钦州绿传科技有限公司 | Diagnosis and control method for preventing electronic oil pump from failing |
| CN111692088B (en) * | 2020-05-21 | 2022-03-01 | 钦州绿传科技有限公司 | Diagnosis and control method for preventing electronic oil pump from failing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107327397B (en) | 2021-06-01 |
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