CN103471079A - Back pressure overrunning control method for 300MW high back pressure unit system - Google Patents
Back pressure overrunning control method for 300MW high back pressure unit system Download PDFInfo
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- CN103471079A CN103471079A CN2013103909647A CN201310390964A CN103471079A CN 103471079 A CN103471079 A CN 103471079A CN 2013103909647 A CN2013103909647 A CN 2013103909647A CN 201310390964 A CN201310390964 A CN 201310390964A CN 103471079 A CN103471079 A CN 103471079A
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- back pressure
- predetermined value
- steam turbine
- return water
- high back
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Abstract
The invention provides a back pressure overrunning control method for a 300MW back pressure unit system. The method includes: when back pressure overruns a predetermined value in case of low unit operational load and decreased return water temperature in the 3mmMW high back pressure unit system, increasing the unit operational load until the back pressure is lower than the predetermined value; when the back pressure overruns the predetermined value in case of high unit operational load and increased return water temperature in the 300MW high back pressure unit system, decreasing the unit operational load until the back pressure is lower than the predetermined value. The method has the advantages that the back pressure is adjusted according to different unit operational loads and return water temperatures, and safe economical operation of 300MW high back pressure units in a case of heat supply network failure is achieved effectively.
Description
Technical field
The back pressure that the present invention relates to a kind of 300MW High Back Pressure Steam Turbine Units system control method that transfinites, belong to motor heating equipment technical field.
Background technology
The faults such as damage, heat supply network leakage probably appear occurring such as a secondary heat exchanger in the 300MW High Back Pressure Steam Turbine Units when operation, and these faults can make return water temperature raise, thereby cause transfiniting of back pressure.When back pressure transfinites, prior art need to reduce unit load usually, if more serious but the load of reduction simply likely can make back pressure transfinite.
Summary of the invention
If the present invention occurs that the part of devices fault easily causes the problem that back pressure transfinites for solving existing 300MW High Back Pressure Steam Turbine Units when the operation, and then provide a kind of back pressure of the 300MW High Back Pressure Steam Turbine Units system control method that transfinites.For this reason, the invention provides following technical scheme:
A kind of back pressure of 300MW High Back Pressure Steam Turbine Units system control method that transfinites comprises:
When the unit operation of described 300MW High Back Pressure Steam Turbine Units system load is lower and return water temperature reduces while causing that back pressure surpasses predetermined value, increase the unit operation load until back pressure lower than predetermined value;
When the unit operation of described 300MW High Back Pressure Steam Turbine Units system load is higher and return water temperature raises while causing that back pressure surpasses predetermined value, reduce the unit operation load until back pressure lower than predetermined value.
The back pressure of the 300MW High Back Pressure Steam Turbine Units system provided by the invention control method that transfinites, regulate back pressure by the load of the unit operation according to different and return water temperature, effectively solved the safety and economic operation of 300MW High Back Pressure Steam Turbine Units under the damage accident of heat-supply network state.
The specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under the creative work prerequisite, belong to the scope of protection of the invention.
The specific embodiment of the present invention provides a kind of back pressure of 300MW High Back Pressure Steam Turbine Units system control method that transfinites, and comprising:
When the unit operation of described 300MW High Back Pressure Steam Turbine Units system load is lower and return water temperature reduces while causing that back pressure surpasses predetermined value, increase the unit operation load until back pressure lower than predetermined value;
When the unit operation of described 300MW High Back Pressure Steam Turbine Units system load is higher and return water temperature raises while causing that back pressure surpasses predetermined value, reduce the unit operation load until back pressure lower than predetermined value.
Concrete, the back pressure of the 300MW High Back Pressure Steam Turbine Units system that this specific embodiment the provides control method that transfinites is by the high back pressure heating system is carried out to the variable parameter operation analysis, some characteristics and the control ability of analytical system itself, thus theoretical direction provided for dynamic analysis and the control strategy in later stage.
The predetermined value of the back pressure of 300MW High Back Pressure Steam Turbine Units system can be set to 42KPa, if think to transfinite and need over this value, adjusts.
If the accident that heat supply network is revealed occurs, the heat of the recirculated water in system can excessively run off, return water temperature in circulating involuting system can reduce, if now the unit operation of 300MW High Back Pressure Steam Turbine Units system load is lower, needing increases load, so that the back pressure of 300MW High Back Pressure Steam Turbine Units system is in place of safety.
If damaging appears in a secondary heat exchanger, the recirculated water in system can not be taken away heat by heat exchanger, return water temperature in circulating involuting system can raise, if now the unit operation of 300MW High Back Pressure Steam Turbine Units system load is higher, need to reduce load, so that the back pressure of 300MW High Back Pressure Steam Turbine Units system is in place of safety.
The technical scheme that adopts this specific embodiment to provide, regulate back pressure by the load of the unit operation according to different and return water temperature, effectively solved the safety and economic operation of 300MW High Back Pressure Steam Turbine Units under the damage accident of heat-supply network state.
The above; it is only the preferably specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (1)
1. the back pressure of the 300MW High Back Pressure Steam Turbine Units system control method that transfinites, is characterized in that, comprising:
When the unit operation of described 300MW High Back Pressure Steam Turbine Units system load is lower and return water temperature reduces while causing that back pressure surpasses predetermined value, increase the unit operation load until back pressure lower than predetermined value;
When the unit operation of described 300MW High Back Pressure Steam Turbine Units system load is higher and return water temperature raises while causing that back pressure surpasses predetermined value, reduce the unit operation load until back pressure lower than predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103909647A CN103471079A (en) | 2013-09-02 | 2013-09-02 | Back pressure overrunning control method for 300MW high back pressure unit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103909647A CN103471079A (en) | 2013-09-02 | 2013-09-02 | Back pressure overrunning control method for 300MW high back pressure unit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103471079A true CN103471079A (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103909647A Pending CN103471079A (en) | 2013-09-02 | 2013-09-02 | Back pressure overrunning control method for 300MW high back pressure unit system |
Country Status (1)
| Country | Link |
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| CN (1) | CN103471079A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19745682A1 (en) * | 1997-10-16 | 1999-04-22 | Bosch Gmbh Robert | Automatic method for determining characteristic values for an IC engine |
| CN102998122A (en) * | 2012-12-20 | 2013-03-27 | 江西省电力科学研究院 | Optimal initial pressure global optimization method for steam turbine set based on multi-factor |
| CN103016082A (en) * | 2012-12-25 | 2013-04-03 | 华北电力大学 | 300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof |
| CN103216282A (en) * | 2013-04-24 | 2013-07-24 | 华北电力大学 | Thermal power generating unit loading control system and method based on continuously adjustable back pressure |
-
2013
- 2013-09-02 CN CN2013103909647A patent/CN103471079A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19745682A1 (en) * | 1997-10-16 | 1999-04-22 | Bosch Gmbh Robert | Automatic method for determining characteristic values for an IC engine |
| CN102998122A (en) * | 2012-12-20 | 2013-03-27 | 江西省电力科学研究院 | Optimal initial pressure global optimization method for steam turbine set based on multi-factor |
| CN103016082A (en) * | 2012-12-25 | 2013-04-03 | 华北电力大学 | 300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof |
| CN103216282A (en) * | 2013-04-24 | 2013-07-24 | 华北电力大学 | Thermal power generating unit loading control system and method based on continuously adjustable back pressure |
Non-Patent Citations (1)
| Title |
|---|
| 郭钰锋，于达仁，赵晓敏: ""直接空冷机组背压保护模糊控制方法"", 《中国高等学校电力系统及自动化专业第二十四届学术年会论文集（下册）》 * |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |