CN103267025B - Frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method - Google Patents
Frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method Download PDFInfo
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- CN103267025B CN103267025B CN201310193085.5A CN201310193085A CN103267025B CN 103267025 B CN103267025 B CN 103267025B CN 201310193085 A CN201310193085 A CN 201310193085A CN 103267025 B CN103267025 B CN 103267025B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Abstract
The present invention relates to a kind of frequency conversion circulating water pump and realize unit cold end system energy-saving automatic control method, comprise the steps: (1) to judge that circulating water pump runs number of units according to unit active power; (2) judge the circulating water pump method of operation: when being (3) judged as single pump mode operation; Then start a variable frequency pump, calculate variable frequency pump control command according to unit optimum vacuum, and variable frequency pump is exported in instruction; (4) be judged as double pump mode operation; If 1. only have one then to start variable frequency pump for variable frequency pump, calculate variable frequency pump control command according to unit optimum vacuum, and instruction is exported to variable frequency pump, regulate variable frequency pump instruction; If 2. unit two pumps is variable frequency pump, then start two variable frequency pumps, regulate two pumps instruction consistent, then calculate variable frequency pump control command according to unit optimum vacuum, and two pumps is exported in instruction, regulate variable frequency pump instruction.The present invention, by the automatic adjustment of variable frequency pump, optimizes the method for operation of each equipment of cold end system, realizes unit optimum vacuum and runs, reach the object of Energy-saving for Thermal Power Units consumption reduction.
Description
Technical field
The invention belongs to generator set frequency conversion circulating water automatic control technology field, especially a kind of frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method.
Background technique
Cold end system workflow is: the exhaust steam of being discharged by turbine low pressure cylinder enters vapour condenser, circulation (cooling) water provided by circulation in vapour condenser is by steam-condensation Cheng Shui (water of condensation), water of condensation enters low-pressure heater, oxygen-eliminating device, the high-pressure heater of unit successively by condensate pump, finally enter boiler, restart a circulation.
In current domestic cold junction control system, circulating water pump is power frequency operation substantially, even if there is circulating water pump Frequency Conversion Modification, the instruction of frequency conversion circulating water pump is manually adjusted for operations staff according to unit actual conditions in running, fail to realize circulating water pump frequency conversion instruction automatically to adjust according to unit actual conditions, like this for frequent variations unit operating mode performance driving economy poor, energy-saving effect is bad.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of frequency conversion circulating water pump to realize unit cold end system energy-saving automatic control method.
The present invention solves its technical problem and takes following technological scheme to realize:
A kind of frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method, comprises the steps:
(1) judge that circulating water pump runs number of units according to unit active power;
(2) judge the circulating water pump method of operation: when unit load is greater than 50% rated load, and only have a circulating water pump to run, and circulating water pump is judged to be single pump pattern under dropping into the condition of the automatic method of operation, when unit load is greater than 50% rated load, and two circulating water pump are all in operation, and at least one circulating water pump is judged to be double pump pattern under dropping into the condition of the automatic method of operation;
(3) when unit is judged as single pump cycle of modes water pump operation;
1. a wherein frequency conversion circulating water pump is started;
2. frequency conversion circulating water pump control command is calculated according to unit optimum vacuum;
3. the control command of calculating is exported to frequency conversion circulating water pump;
4. the automatic control and adjustment of frequency conversion circulating water pump is realized;
(4) when unit is judged as double pump cycle of modes water pump operation;
If 1. unit two circulating water pump only have one for variable frequency pump,
A starts another power frequency circulating water pump;
B, according to unit optimum vacuum, calculates frequency conversion circulating water pump control command;
The control command of calculating is exported to frequency conversion circulating water pump by C, regulates the instruction of frequency conversion circulating water pump;
D realizes the automatic control and adjustment of frequency conversion circulating water pump;
If 2. unit two circulating water pump are variable frequency pump,
A starts an other frequency conversion circulating water pump;
B regulates the instruction of two frequency conversion circulating water pump consistent;
C calculates frequency conversion circulating water pump control command according to unit optimum vacuum;
The control command of calculating is exported to two frequency conversion circulating water pump by D, regulates the instruction of frequency conversion circulating water pump;
E realizes the automatic control and adjustment of frequency conversion circulating water pump.
And (1) described step judges specifically to refer to that the active power of the power of the assembling unit when 50%-100% rated power judges according to unit active power.
And, described step (3) or (4) in frequency conversion circulating water pump control command specifically refer to that frequency conversion circulating water pump power is 85%-100% rated power.
Advantage of the present invention and effect are
1, the present invention is by optimizing frequency conversion circulating water pump regulating method, by the automatic adjustment of frequency conversion circulating water pump, optimize the method for operation of each equipment of cold end system, realize unit optimum vacuum and run, realize the optimization of cold end system, reach the object of Energy-saving for Thermal Power Units consumption reduction.
2, the present invention is by the automatic adjustment of frequency conversion circulating water pump, optimizes the method for operation of each equipment of cold end system, realizes unit optimum vacuum and runs, realize the optimization of cold end system, reach the object of Energy-saving for Thermal Power Units consumption reduction.
Accompanying drawing explanation
Fig. 1 is method logic step schematic diagram of the present invention.
Embodiment
Be further described the embodiment of the present invention below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method, as shown in Figure 1, comprises the steps:
(1) judge that circulating water pump runs number of units according to unit active power (during 50%-100% rated power);
(2) judge the circulating water pump method of operation: when unit load is greater than 50% rated load, and only have a circulating water pump to run, and circulating water pump is judged to be single pump pattern under dropping into the condition of the automatic method of operation, when unit load is greater than 50% rated load, and two circulating water pump are all in operation, and at least one circulating water pump is judged to be double pump pattern under dropping into the condition of the automatic method of operation;
(3) when unit is judged as single pump cycle of modes water pump operation;
1. a wherein frequency conversion circulating water pump is started;
2. frequency conversion circulating water pump control command is calculated according to unit optimum vacuum;
3. the control command of calculating is exported to frequency conversion circulating water pump;
4. the automatic control and adjustment of frequency conversion circulating water pump is realized;
(4) when unit is judged as double pump cycle of modes water pump operation;
If 1. unit two circulating water pump only have one for variable frequency pump,
A starts another power frequency circulating water pump;
B, according to unit optimum vacuum, calculates frequency conversion circulating water pump control command;
The control command of calculating is exported to frequency conversion circulating water pump by C, regulates the instruction of frequency conversion circulating water pump;
D realizes the automatic control and adjustment of frequency conversion circulating water pump;
If 2. unit two circulating water pump are variable frequency pump,
A starts an other frequency conversion circulating water pump;
B regulates the instruction of two frequency conversion circulating water pump consistent;
C calculates frequency conversion circulating water pump control command according to unit optimum vacuum;
The control command of calculating is exported to two frequency conversion circulating water pump by D, regulates the instruction of frequency conversion circulating water pump;
E realizes the automatic control and adjustment of frequency conversion circulating water pump.
In specific embodiment of the invention, (1) described step judges specifically to refer to that the active power of the power of the assembling unit when 50%-100% rated power judges according to unit active power.
In specific embodiment of the invention, described step (3) or (4) in frequency conversion circulating water pump control command specifically refer to that frequency conversion circulating water pump power is 85%-100% rated power.
Claims (1)
1. frequency conversion circulating water pump realizes a unit cold end system energy-saving automatic control method, it is characterized in that: comprise the steps:
(1) judge that circulating water pump runs number of units according to unit active power; Wherein, unit active power judges specifically to refer to the active power of the power of the assembling unit when 50%-100% rated power;
(2) judge the circulating water pump method of operation: when unit load is greater than 50% rated load, and only have a circulating water pump to run, and circulating water pump is judged to be single pump pattern under dropping into the condition of the automatic method of operation, when unit load is greater than 50% rated load, and two circulating water pump are all in operation, and at least one circulating water pump is judged to be double pump pattern under dropping into the condition of the automatic method of operation;
(3) when unit is judged as single pump cycle of modes water pump operation;
1. a wherein frequency conversion circulating water pump is started;
When being 2. 85%-100% rated power according to unit optimum vacuum calculating frequency conversion circulating water pump power, frequency conversion circulating water pump control command;
3. the control command of calculating is exported to frequency conversion circulating water pump;
4. the automatic control and adjustment of frequency conversion circulating water pump is realized;
(4) when unit is judged as double pump cycle of modes water pump operation;
If 1. unit two circulating water pump only have one for variable frequency pump,
A starts another power frequency circulating water pump;
B according to unit optimum vacuum, when to calculate frequency conversion circulating water pump power be 85%-100% rated power, frequency conversion circulating water pump control command;
The control command of calculating is exported to frequency conversion circulating water pump by C, regulates the instruction of frequency conversion circulating water pump;
D realizes the automatic control and adjustment of frequency conversion circulating water pump;
If 2. unit two circulating water pump are variable frequency pump,
A starts an other frequency conversion circulating water pump;
B regulates the instruction of two frequency conversion circulating water pump consistent;
C calculates frequency conversion circulating water pump control command according to unit optimum vacuum;
The control command of calculating is exported to two frequency conversion circulating water pump by D, regulates the instruction of frequency conversion circulating water pump;
E realizes the automatic control and adjustment of frequency conversion circulating water pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193085.5A CN103267025B (en) | 2013-05-23 | 2013-05-23 | Frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310193085.5A CN103267025B (en) | 2013-05-23 | 2013-05-23 | Frequency conversion circulating water pump realizes unit cold end system energy-saving automatic control method |
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| CN103267025A CN103267025A (en) | 2013-08-28 |
| CN103267025B true CN103267025B (en) | 2015-09-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103711677B (en) * | 2013-12-25 | 2016-03-30 | 大唐贵州发耳发电有限公司 | A kind of generator unit cooling water pipe structure |
| CN104595222A (en) * | 2014-11-13 | 2015-05-06 | 南昌大学 | Fluid control system |
| CN113671830B (en) * | 2021-08-10 | 2024-04-02 | 浙江浙能数字科技有限公司 | Cold end optimization closed-loop control method for thermal power generating unit based on intelligent scoring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102536774A (en) * | 2011-12-27 | 2012-07-04 | 酒泉钢铁(集团)有限责任公司 | Operation characteristics and operation energy efficiency analyzing device of industrial circulating water pump set |
| CN202885588U (en) * | 2012-10-24 | 2013-04-17 | 南京国联电力工程设计有限公司 | Coal power plant circulating water system energy conservation device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2987617B2 (en) * | 1997-03-13 | 1999-12-06 | 三夫 古小高 | Vacuum pumping equipment |
| KR100894018B1 (en) * | 2004-11-19 | 2009-04-17 | 현대중공업 주식회사 | Method for Controlling variable pitch vane of sea water pump |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536774A (en) * | 2011-12-27 | 2012-07-04 | 酒泉钢铁(集团)有限责任公司 | Operation characteristics and operation energy efficiency analyzing device of industrial circulating water pump set |
| CN202885588U (en) * | 2012-10-24 | 2013-04-17 | 南京国联电力工程设计有限公司 | Coal power plant circulating water system energy conservation device |
Non-Patent Citations (4)
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| 基于变频调速技术的电厂循环水系统的优化控制;高峰;《中国优秀硕士论文 工程科技Ⅱ辑》;20070815(第2期);第C042-538页 * |
| 水泵变频能耗的试验研究;邹同华等;《流体机械》;20111031;第39卷(第10期);第1-3,9页 * |
| 汽轮机最有利真空循环水泵变频驱动控制系统;张承慧等;《热能动力工程》;20040131;第19卷(第1期);第81-84页 * |
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