CN101995012A - Thermal power unit cooperative load change control method - Google Patents
Thermal power unit cooperative load change control method Download PDFInfo
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- CN101995012A CN101995012A CN2009100564855A CN200910056485A CN101995012A CN 101995012 A CN101995012 A CN 101995012A CN 2009100564855 A CN2009100564855 A CN 2009100564855A CN 200910056485 A CN200910056485 A CN 200910056485A CN 101995012 A CN101995012 A CN 101995012A
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Abstract
The invention provides a thermal power unit cooperative load change control method, including that: load deviation, thermal well water level deviation and deaerator water level deviation are acquired; steady state, loading or unloading process is carried out on the load deviation, thermal well water level deviation and deaerator water level deviation; according to different working conditions, the load deviation and the water level deviation are subject to weighting; the result is subject to half integral and high-low limit intelligent change; a condensate pump outlet door adjustment instruction is obtained; and control at the boiler side is reasonably combined, and performance requirement of thermal power unit load change is met. The thermal power unit cooperative load change control method provided by the invention is a new method utilizing unit energy storage, the control at the boiler side is reasonably combined, and the requirement of peak shaping can be met while greatly reducing steam engine door adjustment throttle loss, thus improving economy of unit operation.
Description
Technical field
The present invention relates to the varying duty control of thermal power plant's ultra supercritical generating set, and be particularly related to the control method that a kind of fired power generating unit is coordinated varying duty.
Background technology
For quick responsive electricity grid load, must utilize the accumulation of energy of unit.Be in operation, the change of load is the pitch by steam turbine, changes promptly that air inflow realizes.Usually, steam turbine pitch quick acting load-responsive (at first utilizing the accumulation of energy of boiler) during the fired power generating unit varying duty, boiler combustion rate in time changes simultaneously, coordinate the coordination that control is meant boiler combustion rate and steam turbine pitch, when satisfying the unit load requirement, satisfy the stable of unit master vapour pressure, thereby guaranteed the balance of unit.This traditional coordination varying duty method, the steam turbine pitch must have certain restriction loss.
Summary of the invention
The present invention proposes the control method that a kind of fired power generating unit is coordinated varying duty, can still can satisfy the demand of peak load regulation network when significantly reducing the restriction loss of steam turbine pitch, thereby improves the economy of unit operation.
In order to achieve the above object, the present invention proposes the control method that a kind of fired power generating unit is coordinated varying duty, comprising:
Obtain load deviation, water level of thermal well deviation and deaerator level deviation;
Described load deviation, water level of thermal well deviation and deaerator level deviation are carried out stable state, application of load process or load shedding process to be handled;
According to different operating modes, load deviation and water level deviation are weighted processing;
The above results is passed through semi-integral technology and high lower bound intelligence change process;
Obtain pump discharge pitch instruction with fixed attention;
And by with the control reasonable combination of boiler side, satisfy the performance requirement of fired power generating unit varying duty.
Further, the instruction of described pump discharge pitch with fixed attention comprises the variable quantity of the low-pressure pumping steam of needs.
Further, described water level definite value of coagulating the instruction of pump discharge pitch by correction oxygen-eliminating device and condenser changes condensing water flow.
Further, this method is determined the scope of available accumulation of energy according to the particular capacity of oxygen-eliminating device and condenser and the excursion of permission, utilizes the SEA LEVEL VARIATION of oxygen-eliminating device and condenser in safe range.
The fired power generating unit that the present invention proposes is coordinated the control method of varying duty, when varying duty, at first change condensing water flow (utilizing the accumulation of energy of unit condensate water/heat regenerative system), the feedwater of boiler side and the timely action of fuel simultaneously in time replenishes accumulation of energy, makes load reach new balance.This control method is a kind of new method of utilizing storage of the generator set, and with the control reasonable combination of boiler side, the throttling of steam turbine pitch can reduce greatly, even does not have throttling, makes unit operation more economical.
Description of drawings
The condensate water that Figure 1 shows that preferred embodiment of the present invention is transferred the principle schematic of loading.
The specific embodiment
In order more to understand technology contents of the present invention, especially exemplified by specific embodiment and cooperate appended graphic being described as follows.
The present invention proposes the control method that a kind of fired power generating unit is coordinated varying duty, can still can satisfy the demand of peak load regulation network when significantly reducing the restriction loss of steam turbine pitch, thereby improves the economy of unit operation.
Please refer to Fig. 1, Figure 1 shows that the condensate water of preferred embodiment of the present invention is transferred the principle schematic of loading.
The present invention proposes the control method that a kind of fired power generating unit is coordinated varying duty, comprising:
Obtain load deviation, water level of thermal well deviation and deaerator level deviation;
Described load deviation, water level of thermal well deviation and deaerator level deviation are carried out stable state, application of load process or load shedding process to be handled;
According to different operating modes, load deviation and water level deviation are weighted processing;
The above results is passed through semi-integral technology and high lower bound intelligence change process;
Obtain pump discharge pitch instruction with fixed attention;
And by with the control reasonable combination of boiler side, satisfy the performance requirement of fired power generating unit varying duty.
The preferred embodiment according to the present invention, the instruction of described pump discharge pitch with fixed attention comprises the variable quantity of the low-pressure pumping steam of needs.The described water level definite value that oxygen-eliminating device and condenser are revised in the instruction of pump discharge pitch, the change condensing water flow of coagulating.This method is determined the scope of available accumulation of energy according to the particular capacity of oxygen-eliminating device and condenser and the excursion of permission, utilizes the SEA LEVEL VARIATION of oxygen-eliminating device and condenser in safe range.
Groundwork principle of the present invention and being constructed as follows:
1) load instruction directly acts on condensate water throttling sub-loop, and the variable quantity of workload demand is converted into the variable quantity (the condensate water variable quantity that promptly needs) that the low pressure that needs is bled.Thereby revise the water level definite value of oxygen-eliminating device/condenser, change condensing water flow.
2) according to the particular capacity of oxygen-eliminating device/condenser and the excursion of permission, determine the scope of available accumulation of energy, in safe range, utilize the SEA LEVEL VARIATION of oxygen-eliminating device/condenser.
3) control of boiler combustion rate and condensate water transfer burden functional to organically combine coordination.
The fired power generating unit that the present invention proposes is coordinated the control method of varying duty, when varying duty, at first change condensing water flow (utilizing the accumulation of energy of unit condensate water/heat regenerative system), the feedwater of boiler side and the timely action of fuel simultaneously in time replenishes accumulation of energy, makes load reach new balance.This control method is a kind of new method of utilizing storage of the generator set, and with the control reasonable combination of boiler side, the throttling of steam turbine pitch can reduce greatly, even does not have throttling, makes unit operation more economical.
Though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (4)
1. the control method of a fired power generating unit coordination varying duty is characterized in that, comprising:
Obtain load deviation, water level of thermal well deviation and deaerator level deviation;
Described load deviation, water level of thermal well deviation and deaerator level deviation are carried out stable state, application of load process or load shedding process to be handled;
According to different operating modes, load deviation and water level deviation are weighted processing;
The above results is passed through semi-integral technology and high lower bound intelligence change process;
Obtain pump discharge pitch instruction with fixed attention;
And by with the control reasonable combination of boiler side, satisfy the performance requirement of fired power generating unit varying duty.
2. fired power generating unit according to claim 1 is coordinated the control method of varying duty, it is characterized in that, the instruction of described pump discharge pitch with fixed attention comprises the variable quantity of the low-pressure pumping steam of needs.
3. fired power generating unit according to claim 1 is coordinated the control method of varying duty, it is characterized in that, described water level definite value of coagulating the instruction of pump discharge pitch by correction oxygen-eliminating device and condenser changes condensing water flow.
4. fired power generating unit according to claim 1 is coordinated the control method of varying duty, it is characterized in that, this method is determined the scope of available accumulation of energy according to the particular capacity of oxygen-eliminating device and condenser and the excursion of permission, utilizes the SEA LEVEL VARIATION of oxygen-eliminating device and condenser in safe range.
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| CN2009100564855A CN101995012B (en) | 2009-08-14 | 2009-08-14 | Thermal power unit cooperative load change control method |
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| CN2009100564855A CN101995012B (en) | 2009-08-14 | 2009-08-14 | Thermal power unit cooperative load change control method |
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| CN101995012A true CN101995012A (en) | 2011-03-30 |
| CN101995012B CN101995012B (en) | 2013-12-04 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620277A (en) * | 2012-04-19 | 2012-08-01 | 广东电网公司电力科学研究院 | Method and system for controlling load-shedding working condition of supercritical unit |
| CN103217946A (en) * | 2013-03-07 | 2013-07-24 | 上海外高桥第二发电有限责任公司 | Coordination variable load control method based on condensate pump frequency changer set |
| 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 |
| CN104635534A (en) * | 2014-12-22 | 2015-05-20 | 华北电力大学 | Thermal power unit variable load control method using cooling medium of cold end system to adjust |
| CN105020693A (en) * | 2014-04-18 | 2015-11-04 | 上海明华电力技术工程有限公司 | Intelligent direct current furnace water supply separator temperature control method based on UCPS |
| CN107143844A (en) * | 2017-05-27 | 2017-09-08 | 杭州意能电力技术有限公司 | A kind of fired power generating unit control method and system based on condensate throttling |
| CN107542507A (en) * | 2017-07-14 | 2018-01-05 | 同济大学 | Fired power generating unit load instruction quick response device based on low-quality heat recovery |
| CN108061026A (en) * | 2016-11-07 | 2018-05-22 | 上海上电漕泾发电有限公司 | A kind of condensation water tune duty control method of adaptive solidifying pump operation mode |
| CN108227500A (en) * | 2018-01-16 | 2018-06-29 | 云南电网有限责任公司电力科学研究院 | A kind of control method for coordinating and system of the quick peak regulation of fired power generating unit |
| CN112327624A (en) * | 2020-11-06 | 2021-02-05 | 西安交通大学 | Peak-shaving operation method for coal-fired unit |
| CN113756895A (en) * | 2021-08-16 | 2021-12-07 | 西安交通大学 | Control method for improving flexibility of coal-fired unit through condensate throttling |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620277A (en) * | 2012-04-19 | 2012-08-01 | 广东电网公司电力科学研究院 | Method and system for controlling load-shedding working condition of supercritical unit |
| CN103217946A (en) * | 2013-03-07 | 2013-07-24 | 上海外高桥第二发电有限责任公司 | Coordination variable load control method based on condensate pump frequency changer set |
| 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 |
| CN103216282B (en) * | 2013-04-24 | 2014-12-03 | 华北电力大学 | Thermal power generating unit loading control system and method based on continuously adjustable back pressure |
| CN105020693B (en) * | 2014-04-18 | 2017-08-25 | 上海明华电力技术工程有限公司 | Once-through Boiler intellectuality feedwater separator temperature control method based on UCPS |
| CN105020693A (en) * | 2014-04-18 | 2015-11-04 | 上海明华电力技术工程有限公司 | Intelligent direct current furnace water supply separator temperature control method based on UCPS |
| CN104635534B (en) * | 2014-12-22 | 2017-10-10 | 华北电力大学 | The fired power generating unit varying duty control method adjusted using cold end system cooling working medium |
| CN104635534A (en) * | 2014-12-22 | 2015-05-20 | 华北电力大学 | Thermal power unit variable load control method using cooling medium of cold end system to adjust |
| CN108061026A (en) * | 2016-11-07 | 2018-05-22 | 上海上电漕泾发电有限公司 | A kind of condensation water tune duty control method of adaptive solidifying pump operation mode |
| CN107143844A (en) * | 2017-05-27 | 2017-09-08 | 杭州意能电力技术有限公司 | A kind of fired power generating unit control method and system based on condensate throttling |
| CN107542507A (en) * | 2017-07-14 | 2018-01-05 | 同济大学 | Fired power generating unit load instruction quick response device based on low-quality heat recovery |
| CN107542507B (en) * | 2017-07-14 | 2019-06-11 | 同济大学 | Fired power generating unit load instruction quick response device based on low-quality heat recovery |
| CN108227500A (en) * | 2018-01-16 | 2018-06-29 | 云南电网有限责任公司电力科学研究院 | A kind of control method for coordinating and system of the quick peak regulation of fired power generating unit |
| CN108227500B (en) * | 2018-01-16 | 2020-11-03 | 云南电网有限责任公司电力科学研究院 | Thermal power generating unit rapid peak regulation coordination control method and system |
| CN112327624A (en) * | 2020-11-06 | 2021-02-05 | 西安交通大学 | Peak-shaving operation method for coal-fired unit |
| CN113756895A (en) * | 2021-08-16 | 2021-12-07 | 西安交通大学 | Control method for improving flexibility of coal-fired unit through condensate throttling |
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