CN102352780B - Optimal control method of cold end of thermal power generating unit - Google Patents
Optimal control method of cold end of thermal power generating unit Download PDFInfo
- Publication number
- CN102352780B CN102352780B CN201110182546.XA CN201110182546A CN102352780B CN 102352780 B CN102352780 B CN 102352780B CN 201110182546 A CN201110182546 A CN 201110182546A CN 102352780 B CN102352780 B CN 102352780B
- Authority
- CN
- China
- Prior art keywords
- circulating water
- water pump
- operation mode
- optimal
- back pressure
- 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.)
- Active
Links
Landscapes
- Control Of Turbines (AREA)
Abstract
The invention discloses an optimal control method of the cold end of a thermal power generating unit. The method comprises the following steps: S1, acquriing the inlet temperature of circulation water of a condenser and the load rate of a generator; S2, calculating the optimal operation mode of a circulation water pump according to the inlet temperature of the circulation water of the condenser and the load rate of the generator under the initial property and given operation mode of the circulation water pump; S3, comparing the current operation mode of the circulation water pump with the optimal operation mode of the circulation water pump, continuing the current operation mode if the current operation mode is same as the optimal operation mode, otherwise executing S4 if the current operation mode is not same as the optimal operation mode; and S4, starting up a driving instruction, and switching the operation mode of the circulation water pump to the optimal operation mode. According to the invention, no matter how the circulation water temperature and the load of the generator vary, the operation mode of the circulation water pump is always in an optimal state, so that the real-time optimal control of the cold end under the environment at the time is realized, and the energy-saving potentiality of the thermal power generating unit can be developed maximally.
Description
Technical field
The invention belongs to field of thermal power, be specifically related to a kind of optimal control method of cold end of thermal power generating unit.
Background technique
The efficiency of fired power generating unit is by cold junction parameter influence, and wherein quantity of circulating water exists adjusting condition sometimes, and cold junction operation can be made to be in optimum state.But just press circulating water temperature rise at present simply to control, cold junction still can not be made to reach the level of optimization of prevailing circumstances condition, be unfavorable for the energy-saving potential excavating fired power generating unit to greatest extent.
Summary of the invention
(1) technical problem that will solve
The object of the invention is the deficiency for current Energy-saving for Thermal Power Units Potential model, a kind of level of optimization that cold junction can be made to reach prevailing circumstances condition is provided, while generated energy is large, reduces the optimal control method of cold end of thermal power generating unit of power consumption.
(2) technological scheme
In order to solve the problems of the technologies described above, the invention provides a kind of optimal control method of cold end of thermal power generating unit, comprising the following steps:
S1, obtains vapour condenser circulating water intake temperature and generator load rate;
S2, under the initial characteristic and the given method of operation of circulating water pump, according to the optimal operation mode of described vapour condenser circulating water intake temperature and generator load rate computation cycles water pump;
S3, compares the current method of operation of circulating water pump with described optimal operation mode; If identical, then continue the current method of operation; If different, then proceed to step S4;
S4, starts driving instruction, switches the method for operation of circulating water pump to described optimal operation mode.
Preferably, the method calculating circulating water pump optimal operation mode in described step S2 comprises step:
S21, under the initial characteristic and the given method of operation of circulating water pump, according to vapour condenser circulating water intake temperature, generator load rate, obtains the working state of circulating water pump operation point;
S22, according to working state calculating generator generating increment and the circulating water pump power consumption respectively of circulating water pump operation point;
S23, deducts circulating water pump power consumption by described electrical power generators increment and obtains having a net increase of generated energy;
S24, regulates the quantity of circulating water of circulating water pump, has a net increase of Energy Maximization and described in making within the scope of the possible quantity of circulating water of circulating water pump, thus obtains the optimal operation mode of circulating water pump.
Preferably, in described step S22, the computational methods of electrical power generators increment comprise step:
S221, obtains given turbine back pressure according to the working state of circulating water pump operation point;
S222, obtains steam turbine according to turbine discharge amount and steam discharge mass dryness fraction and iterates back pressure;
S223, more described given back pressure and iterate back pressure; If equal, calculating generator generating increment, if unequal, regulates turbine back pressure until with to iterate back pressure equal.
(3) beneficial effect
The present invention passes through vapour condenser Inlet Temperature of Circulating Water and generator power on-line measurement signal, computation cycles water pump optimal operation mode, then compares with the current method of operation, if difference, starts driving instruction, switches the method for operation of circulating water pump.How to change regardless of circulating water temperature and generator load, make the circulating water pump method of operation be in optimum all the time, realize the real-time cold junction optimal control under prevailing circumstances condition, excavate the energy-saving potential of fired power generating unit to greatest extent.
Accompanying drawing explanation
Fig. 1 is the flow chart of optimal control method of cold end of thermal power generating unit of the present invention;
Fig. 2 is the flow chart of optimal control method of cold end of thermal power generating unit one embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but do not limit the scope of the invention.
As shown in Fig. 1 ~ Fig. 2, optimal control method of cold end of thermal power generating unit of the present invention, comprises the following steps:
S1, obtains vapour condenser circulating water intake temperature and generator load rate;
S2, under the initial characteristic and the given method of operation of circulating water pump, according to the optimal operation mode of described vapour condenser circulating water intake temperature and generator load rate computation cycles water pump;
S3, compares the current method of operation of circulating water pump with described optimal operation mode; If identical, then continue the current method of operation; If different, then proceed to step S4;
S4, starts driving instruction, switches the method for operation of circulating water pump to described optimal operation mode.
Wherein, the method calculating circulating water pump optimal operation mode in described step S2 comprises step:
S21, under the initial characteristic and the given method of operation of circulating water pump, according to vapour condenser circulating water intake temperature, generator load rate, obtains the working state of circulating water pump operation point;
S22, according to working state calculating generator generating increment and the circulating water pump power consumption respectively of circulating water pump operation point;
S23, deducts circulating water pump power consumption by described electrical power generators increment and obtains having a net increase of generated energy;
S24, regulates the quantity of circulating water of circulating water pump, has a net increase of Energy Maximization and described in making within the scope of the possible quantity of circulating water of circulating water pump, thus obtains the optimal operation mode of circulating water pump.
Further, in described step S22, the computational methods of electrical power generators increment comprise step:
S221, obtains given turbine back pressure according to the working state of circulating water pump operation point;
S222, obtains steam turbine according to turbine discharge amount and steam discharge mass dryness fraction and iterates back pressure;
S223, more described given back pressure and iterate back pressure; If equal, calculating generator generating increment, if unequal, regulates turbine back pressure until with to iterate back pressure equal.
As stated above, in one embodiment, the variable-speed operation of one, one and half and two circulating water pump within the scope of the specified water yield of water pump optimum the power consumption sum of circulating ratio, back pressure, generated output increment and circulating water pump, the power consumption of circulating water pump is calculated according to Inlet Temperature of Circulating Water, generator load rate and hours run that certain power plant's calendar year 2001 is average month by month, and then calculate the economic well-being of workers and staff of given cost of electricity-generating and compare with current operating mode, visual effects.Energy-saving effect is relevant with Inlet Temperature of Circulating Water and generator load.
In the present embodiment, use seawater as vapour condenser circulating water, can ocean temperature be obtained at condenser water inlet, can generator power be obtained by on-line measurement; The circulating water pump method of operation is that circulating water pump runs number of units, is given when initial; Circulating water pump initial characteristic comprises circulating water pump maximum volume flow, circulating water pump biggest quality flow and circulating water pump rated revolution.Circulating water pump operation point comprise two pumps arranged side by side time the operation point of every pump and single pump work point: by circulating water pump operation point calculating generator generating increment and circulating water pump power consumption respectively; Electrical power generators increment obtains given turbine back pressure according to the working state of circulating water pump operation point, obtains steam turbine iterate back pressure according to turbine discharge amount and steam discharge mass dryness fraction; More described given back pressure and iterate back pressure; If equal, calculating generator generating increment, if unequal, regulates turbine back pressure until with to iterate back pressure equal.The back pressure of steam turbine is operationally the function of unit generation load, circulating water temperature, circulating water flow.When steam turbine back pressure is higher or lower than design specified back pressure, for the input of same parameter, the generated energy of steam turbine will than reducing to some extent during specified back pressure or increasing.When changing the circulating water method of operation, not only changing quantity of circulating water, have also been changed the power consumption of circulating water pump.Therefore, in the possible water supply coverage of circulating pump system, have a best water yield, to should water yield generated energy increment that the operation back pressure of steam turbine is formed deduct recycle pump power consumption have a net increase of Energy Maximization.The combination of different water pump operation state will have different water outputs and different above-mentionedly have a net increase of generated energy, compares these and has a net increase of generated energy and can find the method for operation for above-mentioned optimum target.
The circulating water pump method of operation of table 1 for adopting under different generator load rate and Inlet Temperature of Circulating Water.
Table 1
How to change regardless of circulating water temperature and generator load, make the number of units of circulating water pump be in optimum all the time, realize the real-time cold junction optimal control under prevailing circumstances condition, excavate the energy-saving potential of fired power generating unit to greatest extent.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (1)
1. an optimal control method of cold end of thermal power generating unit, is characterized in that, comprises the following steps:
S1, obtains vapour condenser circulating water intake temperature and generator load rate;
S2, under the initial characteristic and the given method of operation of circulating water pump, according to the optimal operation mode of described vapour condenser circulating water intake temperature and generator load rate computation cycles water pump;
S3, compares the current method of operation of circulating water pump with described optimal operation mode; If identical, then continue the current method of operation; If different, then proceed to step S4;
S4, starts driving instruction, switches the method for operation of circulating water pump to described optimal operation mode;
The method calculating circulating water pump optimal operation mode in described step S2 comprises step:
S21, under the initial characteristic and the given method of operation of circulating water pump, according to vapour condenser circulating water intake temperature, generator load rate, obtains the working state of circulating water pump operation point;
S22, according to working state calculating generator generating increment and the circulating water pump power consumption respectively of circulating water pump operation point;
S23, deducts circulating water pump power consumption by described electrical power generators increment and obtains having a net increase of generated energy;
S24, regulates the quantity of circulating water of circulating water pump, has a net increase of Energy Maximization and described in making within the scope of the possible quantity of circulating water of circulating water pump, thus obtains the optimal operation mode of circulating water pump;
In described step S22, the computational methods of electrical power generators increment comprise step:
S221, obtains given turbine back pressure according to the working state of circulating water pump operation point;
S222, obtains steam turbine according to turbine discharge amount and steam discharge mass dryness fraction and iterates back pressure;
S223, more described given turbine back pressure and steam turbine iterate back pressure; If equal, calculating generator generating increment, if unequal, regulates given turbine back pressure until to iterate back pressure equal with steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110182546.XA CN102352780B (en) | 2011-06-30 | 2011-06-30 | Optimal control method of cold end of thermal power generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110182546.XA CN102352780B (en) | 2011-06-30 | 2011-06-30 | Optimal control method of cold end of thermal power generating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102352780A CN102352780A (en) | 2012-02-15 |
| CN102352780B true CN102352780B (en) | 2015-02-18 |
Family
ID=45576411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110182546.XA Active CN102352780B (en) | 2011-06-30 | 2011-06-30 | Optimal control method of cold end of thermal power generating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102352780B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571343B (en) * | 2014-10-31 | 2017-10-10 | 王砧 | Air cooling turbo-generator steam turbine operation back pressure Filled function control method and system |
| CN104749999B (en) * | 2015-03-20 | 2018-06-26 | 国电科学技术研究院有限公司 | The Turbo-generator Set cold end system optimization operation of assembling wet cooling tower accurately instructs system |
| CN106894854B (en) * | 2017-02-23 | 2018-07-10 | 西安西热节能技术有限公司 | Table coagulates formula indirect air cooling generating set cold end system running optimizatin method |
| CN113513746B (en) * | 2021-04-26 | 2023-02-28 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Method for determining optimized operation mode of closed circulating water system of thermal power plant |
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666319A (en) * | 2009-09-29 | 2010-03-10 | 长沙翔鹅节能技术有限公司 | Energy saving method for circulating water system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3820636B2 (en) * | 1996-07-29 | 2006-09-13 | 石川島播磨重工業株式会社 | Method and apparatus for controlling feed water temperature in exhaust recombustion combined cycle plant |
-
2011
- 2011-06-30 CN CN201110182546.XA patent/CN102352780B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666319A (en) * | 2009-09-29 | 2010-03-10 | 长沙翔鹅节能技术有限公司 | Energy saving method for circulating water system |
Non-Patent Citations (5)
| Title |
|---|
| 300MW机组循环水系统运行方式优化;崔修强;《万方学位论文》;20050926;第13页 * |
| condenser Performance Test and Back-Pressure Improvement;J.Piskorowski 等;《EPRI》;19880430;全文 * |
| 发电厂冷端系统最优运行方式的研究;陈国年;《汽轮机技术》;20040228;第46卷(第1期);全文 * |
| 汽轮机冷端优化的研究;赵斌 等;《热力透平》;20070331;第36卷(第1期);全文 * |
| 火电厂冷端系统性能分析及优化研究;何冬辉;《CNKI优秀硕士学位论文全文库》;20100822;第76-84页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102352780A (en) | 2012-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102352780B (en) | Optimal control method of cold end of thermal power generating unit | |
| CN103244433B (en) | Power plant's frequency conversion circulating water pump optimizing operation monitoring method | |
| CN109538317A (en) | A kind of Dynamic calculation method of the heat regenerative system that can be improved peak load regulation ability and heat regenerative system heat storage can vapor (steam) temperature | |
| CN107420142B (en) | A kind of Turbine Cold Junction optimization progress control method following pump based on frequency conversion | |
| CN103266646A (en) | Variable frequency variable pressure water supply implementation method and variable frequency variable pressure water supply implementation device | |
| JP2018168745A (en) | Compressed air storage power generation device | |
| CN104088771A (en) | Accurate determination method of optimal water pump unit combination operation scheme of circulation cooling water system of power plant | |
| CN103778478A (en) | Method for forecasting optimal operation mode of circulating water in combination with tidal characteristic of sea water | |
| CN106437875A (en) | Thermal power generating unit working medium shunting circulation peak shaving system | |
| CN105956732A (en) | Energy saving amount calculating method after replacing electric pump by steam pump for circulating water of heat supply network | |
| Xia et al. | Optimization of a seawater once-through cooling system with variable speed pumps in fossil fuel power plants | |
| CN203847328U (en) | Wind power air energy accumulation variable-load sea water desalination system | |
| CN106894854B (en) | Table coagulates formula indirect air cooling generating set cold end system running optimizatin method | |
| CN111206970B (en) | Peak regulating system utilizing steam jet and steam extractor in thermal power plant and control method | |
| CN110390430A (en) | A kind of frequency conversion type water circulating pump optimizing operation method avoiding frequent start-stop | |
| Ostapenko et al. | Energy efficiency of energy supply systems, based on combined cogeneration heat pump installations | |
| CN207004782U (en) | Environmental Power Plant circulating water energy-saving device | |
| CN210887401U (en) | But deep frequency conversion's of closed circulative cooling unit river limit water supply system | |
| CN103485962A (en) | Drainage complementary energy utilization system of once-through cooling unit | |
| CN103790657A (en) | Steam distributing method and device for waste heat generating system of charcoal ink factory | |
| CN202326018U (en) | Stable power-generating system based on conversion of wind energy and water energy | |
| Fan | Research on Economic Effect of Wind Power Accommodation Based on Electric Boiler and Heat Accumulator [J] | |
| CN215759328U (en) | Energy-saving water pump device | |
| Cong et al. | Utilizing the tail energy of circulating water in coal-fired power plants: water power station | |
| Dariusz et al. | Electrical energy recovery from network water pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |