CN107100860A - Steam Turbine condensate pump high voltage converter one drag two controls implementation - Google Patents
Steam Turbine condensate pump high voltage converter one drag two controls implementation Download PDFInfo
- Publication number
- CN107100860A CN107100860A CN201710397881.9A CN201710397881A CN107100860A CN 107100860 A CN107100860 A CN 107100860A CN 201710397881 A CN201710397881 A CN 201710397881A CN 107100860 A CN107100860 A CN 107100860A
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- China
- Prior art keywords
- frequency
- pump
- condensate
- condensate pump
- conversion
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
Abstract
Implementation is controlled the present invention relates to a kind of Steam Turbine condensate pump high voltage converter one drag two, a high voltage converter is shared including two condensate pumps, #1 is dragged respectively, #2 Condensate Pump Frequency Conversions are run, realize the one drag two control mode of frequency converter, put into minimum disposable apparatus, the energy-saving effect of frequency converter is played to greatest extent, realize condensate pump power frequency, the latch-up protection of frequency conversion bypass changeover and stand-by pump power frequency interlocked startup logic function, it ensure that condensate pump and condensate system remain to realize to the steady regulation between 600~1500rpm of condensate pump in the case of high voltage converter failure.Disposable apparatus of the present invention input is low, if the annual equivalent run time of unit is 4000 hours, and a kilowatt hour electricity can save 700,000 yuan or so for 1 year by 0.3 yuan of calculating, 2 years can reclaimer input cost, economic benefit and social benefit are apparent.
Description
Technical field
The invention belongs to Automatic Generation Control technical field, particularly a kind of Steam Turbine condensate pump high voltage converter one
Drag two control implementations.
Background technology
Energy-saving is an important process of China's power plant production management link, how to reduce condensing-type turbine generator
The station service of unit, improves the cycle efficieny of generating set, for reduction production cost, lifting economic benefit, the life of enhancing enterprise
Deposit ability significant.With deepening continuously for electricity marketization process, power system supplies power load peak-valley difference increasingly
Increase, generating set needs depth varying duty peaking operation daily, now condensate pump load variations scope is very big and for a long time
Deviate economic running.The condensate pump of conventional generating set typically two 100% capacity of configuration a, job one is standby
With condensate pump motor is run under power frequency mode, and generating set needs to pump out by adjusting condensate during varying duty
Mouth valve opening regulation flow, restriction loss is very big, and not only control accuracy is poor, and uneconomical.High voltage converter control device
Condensate pump can be made to be in optimal operational condition at any time, motor operation efficiency is greatly improved, the production cost of power plant is reduced, but it is high
The disposable input ratio of voltage frequency changer is larger, and equipment investment is longer return period.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, and to propose a kind of Steam Turbine condensate pump high voltage converter
One drag two controls implementation.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of Steam Turbine condensate pump high voltage converter one drag two control implementation, including step are as follows：
(1) control system is built, QF1 is the 6kV power switches that #1 coagulates pump power frequency, and QF3 is high-pressure frequency-conversion appliance mains switch,
QF2 is the power frequency 6kV power switches that #2 coagulates pump, and QF4, QF5 are that the solidifying pump frequency conversion of #1, #2 is kept apart respectively in frequency convertor system
Close, the variable frequency alternating current power source of frequency converter output is switched over by the two disconnecting switch controls #1, #2 condensate pump respectively
Conversion system starts；
(2) #1 is coagulated into pump power frequency and switchs the mutual lockings of the solidifying pump frequency conversion disconnecting switch QF4 of QF1 and #1, #2 is coagulated into pump power frequency and opened
Close QF2 and #2 and coagulate the mutual lockings of pump frequency conversion disconnecting switch QF5, #1 is coagulated into pump frequency conversion disconnecting switch QF4 and isolated with the solidifying pump frequency conversions of #2
Switch the mutual lockings of QF5, it is ensured that #1, #2 coagulate the safe operation and normal switching of pump power frequency and VFC mode；
(3) before frequency converter starts, control system is coagulated the solidifying pump frequency conversion of pump frequency conversion disconnecting switch QF4 and #2 to #1 and kept apart simultaneously
Close QF5 to be detected, when the two switch only one of which are closed a floodgate, frequency converter could complete self-inspection, possess entry condition, now
Combined floodgate high-pressure frequency-conversion appliance mains switch QF3 starts frequency converter, coagulates pump frequency conversion disconnecting switch QF4 according to #1 and isolates with the solidifying pump frequency conversions of #2
QF5 closing position is switched, #1, #2 condensate pump are started by conversion system respectively；
After (4) condensate pumps are normally started with conversion system, operator, which again manually puts into interlocking switch LS, to be joined
Lock, another condensate pump is thrown it is standby, after work condensate pump or high voltage converter are because of certain reason emergency stop valve trip, then from
Move with power frequency mode interlocked startup stand-by pump.
Moreover, after condensate pump is started with conversion system, frequency converter receives extraneous given 4~20mA signals, correspondence is defeated
Go out 20~50Hz AC frequency conversion power supply, driving condensate pump motor is realized to steady between 600~1500rpm of condensate pump
Regulation.
Advantages and positive effects of the present invention are：
The present invention is handled by simple logic control using a high voltage converter and drags two condensate pumps changes respectively
Frequency is run, and disposable apparatus input is low, using domestic high voltage AC converter unit price substantially in 0.06 ten thousand yuan/kilowatt or so, is coagulated
Bear water and coagulate 0.2 percentage point of pump consumption rate decline under pump frequency conversion operating condition in generating set unit generated energy, after Frequency Conversion Modification
The average power saving rate of solidifying pump be 59.31%, if the annual equivalent run time of unit is 4000 hours, a kilowatt hour electricity is pressed
0.3 yuan of calculating, then can save RMB a year at 700,000 yuan or so, 2 years can reclaimer input cost, economic benefit
And social benefit is apparent.
Brief description of the drawings
Fig. 1 is the structural representation that the inventive method uses system.
Embodiment
The embodiment of the present invention is further described below：It is emphasized that embodiment of the present invention is explanation
Property, rather than it is limited, therefore the present invention is not limited to the embodiment described in embodiment, it is every by this area
The other embodiment that technical staff's technique according to the invention scheme is drawn, also belongs to the scope of protection of the invention.
A kind of Steam Turbine condensate pump high voltage converter one drag two control implementation, including step are as follows：
(1) control system is built, as shown in figure 1, QF1 is the 6kV power switches that #1 coagulates pump power frequency, QF3 is high-pressure frequency-conversion
Appliance mains switch, QF2 is the power frequency 6kV power switches that #2 coagulates pump, and QF4, QF5 are that #1, #2 coagulate pump respectively in frequency convertor system
Frequency conversion disconnecting switch, the variable frequency alternating current power source of frequency converter output switches over control #1, #2 respectively by the two disconnecting switch
The conversion system of condensate pump starts；
(2) #1 coagulates pump power frequency switch QF1 and #1 and coagulates the mutual lockings of pump frequency conversion disconnecting switch QF4；#2 coagulates pump power frequency switch QF2
The mutual lockings of pump frequency conversion disconnecting switch QF5 are coagulated with #2；#1 coagulates pump frequency conversion disconnecting switch QF4 and #2 and coagulates pump frequency conversion disconnecting switch QF5
Mutual locking, it is ensured that #1, #2 coagulate the safe operation and normal switching of pump power frequency and VFC mode；
(3) before frequency converter starts, control system is coagulated the solidifying pump frequency conversion of pump frequency conversion disconnecting switch QF4 and #2 to #1 and kept apart simultaneously
Close QF5 to be detected, when the two switch only one of which are closed a floodgate, frequency converter could complete self-inspection, possess permission entry condition,
Now combined floodgate QF3 starts frequency converter, and the combined floodgate that pump frequency conversion disconnecting switch QF4 and #2 coagulates pump frequency conversion disconnecting switch QF5 is coagulated according to #1
Position, starts #1, #2 condensate pump by conversion system respectively, after a condensate pump is normally started with conversion system, behaviour
Interlocking switch LS is put into interlock again by work person manually, and another condensate pump throwing is standby, when work condensate pump or high voltage variable
It is after frequency device is because of certain reason emergency stop valve trip, then automatic with power frequency mode interlocked startup stand-by pump；
(4) after condensate pump is started with conversion system, frequency converter receives extraneous given 4~20mA signals, correspondence output
20~50Hz AC frequency conversion power supply, driving condensate pump motor is realized to the steady tune between 600~1500rpm of condensate pump
Section；
The present invention, by logic switch control, drags the operation of #1, #2 condensate pump respectively using a high voltage converter, real
The two of existing frequency converter drag a control mode, are put into minimum disposable apparatus, and the energy saving effect of frequency converter is played to greatest extent,
Realize the soft start and variable frequency adjustment of condensate pump.
Claims (2)
1. a kind of Steam Turbine condensate pump high voltage converter one drag two controls implementation, it is characterised in that including step such as
Under：
(1) control system is built, QF1 is the 6kV power switches that #1 coagulates pump power frequency, and QF3 is high-pressure frequency-conversion appliance mains switch, QF2
It is the power frequency 6kV power switches that #2 coagulates pump, QF4, QF5 are that #1, #2 coagulate pump frequency conversion disconnecting switch respectively in frequency convertor system, are become
The variable frequency alternating current power source of frequency device output switches over the frequency conversion side for controlling #1, #2 condensate pump respectively by the two disconnecting switch
Formula starts；
(2) #1 is coagulated into pump power frequency and switchs the mutual lockings of the solidifying pump frequency conversion disconnecting switch QF4 of QF1 and #1, #2 is coagulated into pump power frequency switchs QF2
The mutual lockings of pump frequency conversion disconnecting switch QF5 are coagulated with #2, #1 is coagulated into pump frequency conversion disconnecting switch QF4 and #2 and coagulates pump frequency conversion disconnecting switch
The mutual lockings of QF5, it is ensured that #1, #2 coagulate the safe operation and normal switching of pump power frequency and VFC mode；
(3) before frequency converter starts, control system coagulates pump frequency conversion disconnecting switch QF4 and #2 to #1 simultaneously and coagulates pump frequency conversion disconnecting switch
QF5 is detected that, when the two switch only one of which are closed a floodgate, frequency converter could complete self-inspection, possess entry condition, now close
Lock high-pressure frequency-conversion appliance mains switch QF3 starts frequency converter, coagulates the solidifying pump frequency conversions of pump frequency conversion disconnecting switch QF4 and #2 according to #1 and keeps apart
QF5 closing position is closed, #1, #2 condensate pump are started by conversion system respectively；
After (4) condensate pumps are normally started with conversion system, interlocking switch LS is put into interlock again by operator manually, will
Another condensate pump throw it is standby, after work condensate pump or high voltage converter are because of certain reason emergency stop valve trip, then it is automatic with
Power frequency mode interlocked startup stand-by pump.
2. Steam Turbine condensate pump high voltage converter one drag two according to claim 1 controls implementation, its feature
It is：After condensate pump is started with conversion system, the extraneous given 4~20mA signals of frequency converter receiving, correspondence output 20~
50Hz AC frequency conversion power supply, driving condensate pump motor is realized to the steady regulation between 600~1500rpm of condensate pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710397881.9A CN107100860A (en) | 2017-05-31 | 2017-05-31 | Steam Turbine condensate pump high voltage converter one drag two controls implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710397881.9A CN107100860A (en) | 2017-05-31 | 2017-05-31 | Steam Turbine condensate pump high voltage converter one drag two controls implementation |
Publications (1)
| Publication Number | Publication Date |
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| CN107100860A true CN107100860A (en) | 2017-08-29 |
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ID=59659892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710397881.9A Pending CN107100860A (en) | 2017-05-31 | 2017-05-31 | Steam Turbine condensate pump high voltage converter one drag two controls implementation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195700A (en) * | 2019-04-26 | 2019-09-03 | 秦皇岛秦热发电有限责任公司 | A kind of condensate pump automatic programme control halt system |
| CN113530871A (en) * | 2021-08-10 | 2021-10-22 | 西安热工研究院有限公司 | Power frequency dynamic switching method for frequency converter fault state of axial flow fan of power station |
| CN113719457A (en) * | 2021-11-03 | 2021-11-30 | 华能（天津）煤气化发电有限公司 | Method for quickly switching multistage centrifugal cryogenic liquid pump of air separation device |
| CN114056533A (en) * | 2021-12-03 | 2022-02-18 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Variable frequency control system and method for marine main seawater cooling pump |
| CN114233615A (en) * | 2022-01-06 | 2022-03-25 | 国家能源集团国源电力有限公司 | Condensate pump switching control method and device, electronic equipment and storage medium |
| CN116428149A (en) * | 2023-04-04 | 2023-07-14 | 华能淮阴第二发电有限公司 | Condensate pump and condensate pump frequency converter operation method |
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| CN202768359U (en) * | 2012-07-18 | 2013-03-06 | 江苏徐塘发电有限责任公司 | Frequency conversion system for double condensate pumps |
| CN202946358U (en) * | 2012-11-22 | 2013-05-22 | 大唐桂冠合山发电有限公司 | Control system of turboset condensate pump |
| CN203297075U (en) * | 2012-12-31 | 2013-11-20 | 深圳市广前电力有限公司 | Five-prevention logical control system of condensate pump frequency converter of combustion gas-steam combined set |
| CN206099836U (en) * | 2016-08-31 | 2017-04-12 | 大连瑞福电器设备有限公司 | One drags two frequency conversions and power frequency control system |
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Patent Citations (4)
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| CN202768359U (en) * | 2012-07-18 | 2013-03-06 | 江苏徐塘发电有限责任公司 | Frequency conversion system for double condensate pumps |
| CN202946358U (en) * | 2012-11-22 | 2013-05-22 | 大唐桂冠合山发电有限公司 | Control system of turboset condensate pump |
| CN203297075U (en) * | 2012-12-31 | 2013-11-20 | 深圳市广前电力有限公司 | Five-prevention logical control system of condensate pump frequency converter of combustion gas-steam combined set |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195700A (en) * | 2019-04-26 | 2019-09-03 | 秦皇岛秦热发电有限责任公司 | A kind of condensate pump automatic programme control halt system |
| CN110195700B (en) * | 2019-04-26 | 2020-06-30 | 秦皇岛秦热发电有限责任公司 | Automatic program-controlled stop system of condensate pump |
| CN113530871A (en) * | 2021-08-10 | 2021-10-22 | 西安热工研究院有限公司 | Power frequency dynamic switching method for frequency converter fault state of axial flow fan of power station |
| CN113719457A (en) * | 2021-11-03 | 2021-11-30 | 华能（天津）煤气化发电有限公司 | Method for quickly switching multistage centrifugal cryogenic liquid pump of air separation device |
| CN114056533A (en) * | 2021-12-03 | 2022-02-18 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Variable frequency control system and method for marine main seawater cooling pump |
| CN114233615A (en) * | 2022-01-06 | 2022-03-25 | 国家能源集团国源电力有限公司 | Condensate pump switching control method and device, electronic equipment and storage medium |
| CN116428149A (en) * | 2023-04-04 | 2023-07-14 | 华能淮阴第二发电有限公司 | Condensate pump and condensate pump frequency converter operation method |
| CN116428149B (en) * | 2023-04-04 | 2024-02-23 | 华能淮阴第二发电有限公司 | Condensate pump and condensate pump frequency converter operation method |
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Application publication date: 20170829 |