CN205714703U - A kind of redundant measurement liquid-level type drainage pump full-automatic control system - Google Patents
A kind of redundant measurement liquid-level type drainage pump full-automatic control system Download PDFInfo
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- CN205714703U CN205714703U CN201620518159.7U CN201620518159U CN205714703U CN 205714703 U CN205714703 U CN 205714703U CN 201620518159 U CN201620518159 U CN 201620518159U CN 205714703 U CN205714703 U CN 205714703U
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- liquid level
- converter
- redundant measurement
- drainage pump
- measurement liquid
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Abstract
A kind of redundant measurement liquid-level type drainage pump full-automatic control system, belongs to thermal power plant low-pressure heater drainage pump and controls technical field.Including air-break and fuse combination unit, the converter of internal PID controller, A.C. contactor, the first differential pressure transmitter P1, the second differential pressure transmitter P2, redundant measurement liquid level processing controller, automatic control switch combination unit, power supply operation troubles alarm lamp device, display operation control panel, DP communication device.Advantage is: redundant measurement liquid level, can eliminate during drainage pump control because measuring liquid level reason and cause that level fluctuation is big, constant level cannot control and generating set may be caused safe and reliable operation situation not occur.This control system adds unit operation reliability.System one-key start, drainage pump control work fully automatic operation, control accuracy is high, safe and reliable.
Description
Technical field
This utility model belongs to thermal power plant low-pressure heater drainage pump and controls technical field, in particular, provides one
Redundant measurement liquid-level type drainage pump full-automatic control system.Low-pressure heater can be controlled and condense water constant liquid level.
Background technology
Thermal power plant low-pressure heater is made up of spiral pipeline, tank body etc., and condensed water enters low pressure by condensing pump
Spiral pipeline in heater, the high-temperature steam after pushing turbine generating enters low-pressure heater tank interior by pipeline,
Through heat exchange, condensed water is improve by temperature after the spiral pipeline that surrounded by high-temperature steam, enters subordinate's heater, the energy
Recycled, saved the energy.And in tank interior, just having condensation water produces, tank body top is steam, and bottom is
Condense water.Under normal circumstances, this condensation water enters back into pipeline by drainage pump.But in extreme circumstances, if condensation water level is raised,
May flow back in steam turbine by steam pipework, cause steam turbine to damage；If condensation water level is too low, condensed water is easily mixed
Miscellaneous QI steeps, and the water of the bubble that adulterates enters pipeline, easily damages inner-walls of duct, sealing, and conduit running is safely by shadow
Ring.Owing to generation load is according to network load situation real-time change, condensed water level and then real-time change, in order to save the energy simultaneously
Ensure generating set safe operation, need to ensure the constant of condensation water level in low-pressure heater.
For the risk overcoming level gauging to bring, apply redundant measurement liquid level mode；For precise constant liquid level and joint
Can, use variable-frequency governor (abbreviation converter) to drive driven by motor drainage pump to automatically control hydrophobic flow；Signal processing, control
The whole automatization of operating process.
Summary of the invention
The purpose of this utility model is to provide a kind of redundant measurement liquid-level type drainage pump full-automatic control system, for fire
Power power plant low-pressure heater condensation water level controls.By redundant measurement liquid level mode, automatically process liquid level signal, automatic decision
Fault in level gauging and correction, reach hydrophobic flow control by the Frequency Converter Control drainage pump rotating speed of internal PID controller
System, Liquid level precision is high, safe and reliable.System one key control, process full-automation runs.
This utility model includes air-break and fuse combination unit 1, the converter 2 of internal PID controller, exchanges
Catalyst the 3, first differential pressure transmitter P1, the second differential pressure transmitter P2, redundant measurement liquid level processing controller 4, automatically control out
Close combination unit 5, power supply-operation-fault alarm indicating lamp device 6, display operation control panel 7, DP communication device 8.Assembly is even
Connect relation as follows: the inlet wire side of air-break and fuse combination unit 1 connects inlet wire 3 phase 380V electrical source of power, outgoing line side
It is connected to the inlet wire side of converter；Converter outgoing line side is connected to the inlet wire side of A.C. contactor 3, the outlet of A.C. contactor 3
Side is connected to the driving motor of drainage pump, drives driven by motor drainage pump to rotate；Air-break and fuse combination unit 1
Outgoing line side is wired on automatic control switch combination unit 5 controlling power supply again, and automatic control switch combination unit 5 is given superfluous respectively
Remaining measurement liquid level processing controller 4, power supply-operation-fault alarm indicating lamp device 5 are powered, automatic control switch combination unit 5
Control signal is connected with redundant measurement liquid level processing controller 4, converter 2, A.C. contactor 3 the most respectively；Two drive test amount liquid levels
First differential pressure transmitter P1, the second differential pressure transmitter P2 are connected to redundant measurement liquid level processing controller, at redundant measurement liquid level
Reason controller output signal is connected to converter；Inverter control signal output connects power supply-operation-fault alarm display lamp dress
Put；Display operation control panel is connected with converter；DP communication device is connected with converter and generating set Central Control Room monitoring system.
Redundant measurement liquid level processing controller is made up of hardware, is made up of CPU module, analog module.CPU module is
ABB PLC product P M564-R-ETH-AC 1, power supply is 100-240ACV, built-in 6 24VD digital quantities input, 6 points
Relay digital output, 1 analog output.Analog module is ABB PLC product simulation amount input template AI561 1
Individual, built-in 4 analog inputs.2 road level gauging signals enter analog module；Comprehensive liquid level signal is by exporting；Start letter
Number enter CPU module digital quantity input；Liquid level high limit, lowest limit signal are by CPU module digital output.
The utility model has the advantage of: redundant measurement liquid level, former because measuring liquid level during drainage pump control can be eliminated
Because causing that level fluctuation is big, constant level cannot control and generating set may be caused safe and reliable operation situation not occur.
This control system adds unit operation reliability.One-key start, drainage pump control work fully automatic operation, control accuracy height,
Safe and reliable.
Accompanying drawing explanation
Fig. 1 is redundant measurement liquid-level type drainage pump full-automatic control system overall structure schematic diagram.Wherein, air-break
With fuse combination unit 1, the converter 2 of internal PID controller, A.C. contactor the 3, first differential pressure transmitter P1, second poor
Pressure transmitter P2, redundant measurement liquid level processing controller 4, automatic control switch combination unit 5, power supply-operation-fault alarm refer to
Show lamp device 6, display operation control panel 7, DP communication device 8.
Detailed description of the invention
This utility model includes air-break and fuse combination unit 1, the converter 2 of internal PID controller, exchanges
Catalyst the 3, first differential pressure transmitter P1, the second differential pressure transmitter P2, redundant measurement liquid level processing controller 4, automatically control out
Close combination unit 5, power supply-operation-fault alarm indicating lamp device 6, display operation control panel 7, DP communication device 8.Air breaks
The inlet wire side of road device and fuse combination unit 1 connects inlet wire 3 phase 380V electrical source of power, and outgoing line side is connected to the inlet wire of converter
Side；Converter outgoing line side is connected to the inlet wire side of A.C. contactor 3, and the outgoing line side of A.C. contactor 3 is connected to driving of drainage pump
Galvanic electricity machine, drives driven by motor drainage pump to rotate；The outgoing line side of air-break and fuse combination unit 1 is again controlling power supply
Being wired on automatic control switch combination unit 5, redundant measurement liquid level processing controls given respectively by automatic control switch combination unit 5
Device 4, power supply-operation-fault alarm indicating lamp device 5 are powered, and automatic control switch combination unit 5 control signal is the most respectively with superfluous
Remaining measurement liquid level processing controller 4, converter 2, A.C. contactor 3 connect；Two drive test amount liquid level the first differential pressure transmitter P1,
Two differential pressure transmitter P2 are connected to redundant measurement liquid level processing controller, and redundant measurement liquid level processing controller output signal connects
To converter；Inverter control signal output connects power supply-operation-fault alarm indicating lamp device；Display operation control panel with
Converter is connected；DP communication device is connected with converter and generating set Central Control Room monitoring system.
By accompanying drawing 1, this utility model will be further described below.
Installing two sets on low-pressure heater tank body and measure level gauge, owing to tank body top is " bearing " nip, bottom is
" high " nip, uses the differential pressure transmitter of two-wire system to measure the differential pressure signal of upper and lower, and differential pressure signal is converted into liquid
Position signal, two set differential pressure transmitters are received on redundant measurement liquid level processing controller by the twisted-pair cable that band shields.Redundancy is surveyed
Amount liquid level processing controller processes liquid level signal by procedure judges.For measuring liquid level fault, take the form of liquid level
Be 0, liquid level is maximum and jitter, and fluctuation is big, signal deviation normal range.Controller can process signal in real time, if two
Drive test amount signal is all normal, calculates liquid level signal as output signal by arithmetical method；If a road liquid level signal fault,
Another road normal level signal is as output signal.Redundant measurement liquid level processing controller is actual anti-as liquid level using liquid level signal
Feedback signal exports to converter for PID control, and output digit signals passes through DP communication device handle to converter, converter simultaneously
Liquid level actual feedback signal and differential pressure transmitter state send generating set Central Control Room monitoring system to；Converter is by line again
To power supply, operation, fault alarm indicating lamp device for fluid level condition signal designation.
Operator apply display operation control panel to carry out procedure configuration to converter in advance, and real electrical machinery parameter is inputted
In converter parameter group, configuration converter parameter has: analog input, output parameter, digital quantity input, output parameter；PID
Control parameter logistic parameter P, integral parameter I, differential parameter D；Motor traffic direction parameter；DP communications parameter, converter electricity
Source preparation is normal, runs, fault, power phase shortage, overvoltage, under-voltage, converter or motor phase failure, crosses stream, short circuit, motor rotation blockage etc.
Status signal parameter；Level set value given parameters.
Liquid level be PID controller according to level set value compared with liquid level actual feedback, by difference control
Motor speed, owing to being control of drawing water, when unit load is little, condensing capacity tails off, and liquid level actual feedback sets less than liquid level
Definite value, now PID controller control converter output makes rotating speed reduce, and hydrophobic flow diminishes, and liquid level actual feedback increases, and comes
Reach former setting value；When unit load is big, condensing capacity becomes big, and liquid level actual feedback is higher than level set value, now PID
Controller controls converter output makes rotating speed increase, and hydrophobic flow becomes big, and liquid level actual feedback reduces, and reaches former setting
Value.If the liquid level difference of liquid level actual feedback and setting is in the range of setting (normal level scope), PID controls output to be protected
Holding constant, motor speed is constant, motor speed and liquid level dynamic equilibrium；When the factors such as unit load make liquid level actual feedback become
(exceeding normal level scope) during change, PID controls output valve and automatically changes, and increases or reduces, and changes with liquid level actual feedback
Direction is identical, reaches new control dynamic equilibrium, makes liquid level actual value constant.
During normal operating, operator only need to close air-break in air-break and fuse combination unit,
Now converter, automatic control switch combination unit are charged, and converter initializes and runs, and application display operation control panel can be normal
Display and setting level value, DP communication device is charged, normal and converter, unit Central Control Room monitoring system communication.Press automatically
Controlling the pre-control button of switch combination unit, redundant measurement liquid level processing controller is charged, and plug-in initializes, and differential pressure becomes
Sending device charged, normally measure liquid level, converter prepares to run；Power supply instruction in power supply, operation, fault alarm indicating lamp device
Lamp is bright；Automatic control switch combination unit controls A.C. contactor and opens.The main control button pressed, starts converter and runs,
Drainage pump control system fully automatic operation.
Claims (2)
1. a redundant measurement liquid-level type drainage pump full-automatic control system, it is characterised in that include air-break and fusing
Device combination unit (1), converter (2), A.C. contactor (3), the first differential pressure transmitter (P1), the second differential pressure transmitter (P2),
Redundant measurement liquid level processing controller (4), automatic control switch combination unit (5), power supply-operation-fault alarm display lamp dress
Put (6), display operation control panel (7), DP communication device (8)；The inlet wire side of air-break and fuse combination unit (1) is even
Tapping into line phase 380V electrical source of power, outgoing line side is connected to the inlet wire side of converter；Converter outgoing line side is connected to A.C. contactor
(3) inlet wire side, the outgoing line side of A.C. contactor (3) is connected to the driving motor of drainage pump, air-break and fuse group
The outgoing line side of locking device (1) is wired on automatic control switch combination unit (5) controlling power supply again, and automatic control switch combines
Device (5) control signal is connected with redundant measurement liquid level processing controller (4), converter (2), A.C. contactor (3) the most respectively；
Two drive tests amount liquid level the first differential pressure transmitter (P1), the second differential pressure transmitter (P2) are connected to redundant measurement liquid level processing controller
(4), redundant measurement liquid level processing controller (4) output signal is connected to converter (2)；The output of converter (2) control signal is even
Connecing power supply-operation-fault alarm indicating lamp device (6), display operation control panel (7) is connected with converter (2)；DP communication device
(8) it is connected with converter (2) and generating set Central Control Room monitoring system.
Redundant measurement liquid-level type drainage pump full-automatic control system the most according to claim 1, it is characterised in that redundancy is surveyed
Amount liquid level processing controller (4) is made up of CPU module, analog module；CPU module is ABB PLC product P M564-R-ETH-
AC 1, power supply is 100-240ACV, built-in 6 24VD digital quantities input, 6 point relay digital outputs, 1 simulation
Amount output；Analog module is ABB PLC product simulation amount input template AI561 1, built-in 4 analog inputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620518159.7U CN205714703U (en) | 2016-05-31 | 2016-05-31 | A kind of redundant measurement liquid-level type drainage pump full-automatic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620518159.7U CN205714703U (en) | 2016-05-31 | 2016-05-31 | A kind of redundant measurement liquid-level type drainage pump full-automatic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205714703U true CN205714703U (en) | 2016-11-23 |
Family
ID=57300231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620518159.7U Expired - Fee Related CN205714703U (en) | 2016-05-31 | 2016-05-31 | A kind of redundant measurement liquid-level type drainage pump full-automatic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205714703U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062551A (en) * | 2017-04-26 | 2017-08-18 | 冶金自动化研究设计院 | A kind of redundant measurement and the intellectual air-conditioning backwater full-automatic control system of control |
| CN109781208A (en) * | 2019-03-21 | 2019-05-21 | 贵州赤天化纸业股份有限公司 | A kind of separator liquid level emasuring device of anti-temperature and pressure big ups and downs |
| CN109855082A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of efficient low-pressure heater draining system and its application method |
-
2016
- 2016-05-31 CN CN201620518159.7U patent/CN205714703U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062551A (en) * | 2017-04-26 | 2017-08-18 | 冶金自动化研究设计院 | A kind of redundant measurement and the intellectual air-conditioning backwater full-automatic control system of control |
| CN109855082A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of efficient low-pressure heater draining system and its application method |
| CN109781208A (en) * | 2019-03-21 | 2019-05-21 | 贵州赤天化纸业股份有限公司 | A kind of separator liquid level emasuring device of anti-temperature and pressure big ups and downs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20190531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |