CN104763537B - Method and device for main steam temperature control at combined cycle unit starting stage - Google Patents
Method and device for main steam temperature control at combined cycle unit starting stage Download PDFInfo
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- CN104763537B CN104763537B CN201510094427.7A CN201510094427A CN104763537B CN 104763537 B CN104763537 B CN 104763537B CN 201510094427 A CN201510094427 A CN 201510094427A CN 104763537 B CN104763537 B CN 104763537B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 description 106
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Abstract
The invention discloses a method and device for main steam temperature control at a combined cycle unit starting stage. The combustion temperature of a gas turbine can be regarded as a function of gas turbine exhaust gas temperature and compressor pressure ratio, therefore the gas turbine compressor pressure ratio and the exhaust gas temperatures of a plurality of gas turbines are firstly measured, according to the exhaust gas temperatures of the plurality of gas turbines, a relatively accurate value can be obtained as the exhaust gas temperature, a starting stage gas turbine temperature control line is looked up according to the compressor pressure ratio of the gas turbine to obtain an exhaust gas temperature limit value, and then the accurate exhaust gas temperature is compared with the exhaust gas temperature limit value to obtain a difference value of the two, the combustion temperature of the gas turbine is controlled through an existing control system according to the difference value, the exhaust gas temperature of the gas turbine is controlled directly so as to reach the purpose of controlling the unit main steam temperature not beyond the limit.
Description
Technical field
The application is related to combined cycle generation field, more particularly, it relates to a kind of Combined Cycle Unit startup stage master
The control method of vapor (steam) temperature and device.
Background technology
Integrated gas-steam combined cycle power plant technology is gradually ripe, the exploitation further of natural gas resource in world wide,
The gas turbine and its combined cycle generation status in power system gradually steps up.The installation that gas turbine possesses is fast, occupation of land
Less, start and stop are rapid, safe and reliable, with water is few etc., series of advantages also enjoys favor.It is expected that with China's energy resource structure
Adjustment, environmental requirement increasingly stringent, combined cycle is as a kind of advanced generation technology, the ground in China's power generation industry
Position is also increasingly improved.
The 9f Combined cycle gas-steam turbine unit that ge company produces is in startup stage specific load region, generally existing master
The easy overheating problem of steam, gas turbine is discharged fume in 80～160mw load area, combustion engine taking certain gas turbine unit as a example
Temperature has reached 649.9 DEG C, and due to igv temperature control intervention, the unlatching of adjustable guide vane makes to enter the high-temperature flue gas stream of waste heat boiler
Amount increases considerably, and now quantity of steam produced by waste heat boiler high pressure evaporator and flue gas flow mismatch, waste heat simultaneously
In design, boiler considers that operating mode is more, the configuration of heat exchange area and vapor (steam) temperature and desuperheating water is to examine operating mode to carry out school
Core, due to the particularity of gas turbine exhaust gas temperature, gas turbine exhaust gas temperature has hump in whole load alternation process
Characteristic, temperature change is low-high-low, considers that deficiency ultimately results in main steam overtemperature under Part load.
Some patents have been had to consider the temperature controlled problem of adjustable guide vane at present, such as number of patent application is
201310117901.4 a kind of gas turbine blower import adjustable guide vane temperature-controlled process, on gas turbine install row
Gas temperature sensor and import adjustable guide vane angular surveying transmitter, by adjusting compressor inlet adjustable guide vane angle, the row of making
Temperature degree presses known rules change.But these patents are controlled, realize the rule change of exhaust just for adjustable guide vane, and
It is unable to the temperature change of effective control unit main steam, does not account for the matching of waste heat boiler and gas turbine, therefore answering
Also had some limitations with aspect.
, by the temperature control mode in optimal startup stage taking multiaxis Combined cycle gas-steam turbine unit (s209fa) as a example,
, it is ensured that temperature does not occur overtemperature alarm, gas turbine is in sub-load for main steam temperature when controlling Combined Cycle Unit to start
Period ignition temperature reduces, and the hot passage parts operating mode of unit is more front than optimizing to be improved, and its combustion component, hot passage parts life-span damage
Depletion is few, and the new exhaust gas temperature control targe of gas turbine start-up course makes gas turbine rb trip accident reduce, toggle speed
Accelerate, accelerate the startup speed of response of unit simultaneously, decrease discharge, improve security, the economy of unit operation
While, also bring social benefit.Therefore, by the temperature control mode in optimal startup stage, to solve unit main steam temperature mistake
High problem, has very strong realistic meaning.
Content of the invention
In view of this, the application provides a kind of control method of Combined Cycle Unit startup stage main steam temperature and dress
Put, by the temperature control mode in optimal startup stage, control the exhaust gas temperature of gas turbine, reach control unit main steam temperature not
The purpose transfiniting.
To achieve these goals it is proposed that scheme as follows:
A kind of control method of Combined Cycle Unit startup stage main steam temperature:
The multiple smoke evacuations circumferentially of the inner side of the smoke evacuation diffuser of the compressor pressure ratio of acquisition gas turbine and gas turbine
Temperature；
Calculate the average exhaust gas temperature of the plurality of exhaust gas temperature；
Startup stage gas turbine temperature control line is looked into according to the compressor pressure ratio of gas turbine, obtains exhaust gas temperature limit value；
Relatively described average exhaust gas temperature and described exhaust gas temperature limit value, obtain the temperature difference of the two；
Adjust the ignition temperature controlling startup stage gas turbine according to described temperature difference, and then adjust the row of gas turbine
Cigarette temperature, reaches the purpose controlling unit main steam temperature not transfinite.
Preferably, also include: after obtaining multiple exhaust gas temperatures of gas turbine, determine the highest in multiple exhaust gas temperatures
Exhaust gas temperature and minimum exhaust gas temperature, described highest exhaust gas temperature and described minimum exhaust gas temperature are rejected.
Preferably, the described multiple exhaust gas temperatures obtaining gas turbine, comprising:
In the inner side of the smoke evacuation diffuser of gas turbine, multiple thermocouples are circumferentially installed, obtain multiple exhaust gas temperatures.
A kind of control device of Combined Cycle Unit startup stage main steam temperature, comprising:
Collecting unit, for obtaining the inner side of the compressor pressure ratio of gas turbine and the smoke evacuation diffuser of gas turbine along circle
Multiple exhaust gas temperatures in week；
Computing unit, for calculating the average exhaust gas temperature of the plurality of exhaust gas temperature；
Searching unit, for looking into startup stage gas turbine temperature control line according to the compressor pressure ratio of gas turbine, is arranged
Cigarette limit temperature value；
Comparing unit, for relatively described average exhaust gas temperature and described exhaust gas temperature limit value, obtains the temperature of the two
Difference；
Control unit, for adjusting, according to described temperature difference, the ignition temperature controlling startup stage gas turbine, and then adjusts
The exhaust gas temperature of whole gas turbine, reaches the purpose controlling unit main steam temperature not transfinite.
Through as shown from the above technical solution, a kind of disclosure gas turbine combustion temperature-controlled process and device.Combustion
The ignition temperature of gas-turbine is considered as a function of gas turbine exhaust gas temperature and forcing press pressure ratio, thus the present invention is first
Measurement obtains the compressor pressure ratio of gas turbine and the exhaust gas temperature of multiple gas turbine, and then according to above-mentioned multiple gas turbines
Exhaust gas temperature obtain a relatively real value as exhaust gas temperature, compare this exhaust gas temperature and calming the anger by gas turbine
Machine pressure ratio looks into the exhaust gas temperature limit value that startup stage gas turbine temperature control line obtains, and obtains the difference between them, by difference
Control the exhaust gas temperature of the ignition temperature indirect control gas turbine of gas turbine by existing control system, reach control machine
The purpose that group main steam temperature does not transfinite.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing providing obtains other accompanying drawings.
Fig. 1 shows an a kind of enforcement of the method for present invention Combined Cycle Unit startup stage Main Steam Temperature Control
The schematic flow sheet of example；
Fig. 2 shows the distribution map of combustion engine exhaust gas temperature thermocouple of the present invention；
Fig. 3 shows present invention startup stage gas turbine temperature control line schematic diagram；
Fig. 4 shows temperature control logic schematic diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Show one of method of a kind of present invention Combined Cycle Unit startup stage Main Steam Temperature Control referring to Fig. 1
The schematic flow sheet of embodiment.
101: obtain inner side circumferentially multiple of the smoke evacuation diffuser of the compressor pressure ratio of gas turbine and gas turbine
Exhaust gas temperature.
In the inner side of smoke evacuation diffuser, if circumferentially installing Heavenly Stems and Earthly Branches chromium-aluminium armoured thermocouple, these thermocouples are used for measuring
Exhaust gas temperature, all these temperature are delivered in speedtronic mark vi control panel by cable, by terminal block, i/o mould
Part, finally respectively enters<r><s><t>controller.
Show the distribution map of combustion engine exhaust gas temperature thermocouple of the present invention referring to Fig. 2.Combustion engine exhaust gas temperature thermocouple point
Cloth is as follows: tt-xd-1, tt-xd-4, tt-xd-7, tt-xd-10, tt-xd-13, tt-xd-16, tt-xd-19, tt-xd-22,
Tt-xd-25, tt-xd-28, tt-xd-31 are carried out into ＜ r ＞ controller.Tt-xd-2, tt-xd-5, tt-xd-8, tt-xd-11,
Tt-xd-14, tt-xd-17, tt-xd-20, tt-xd-23, tt-xd-26, tt-xd-29 are carried out into ＜ s ＞ controller.tt-xd-
3, tt-xd-6, tt-xd-9, tt-xd-12, tt-xd-15, tt-xd-18, tt-xd-21, tt-xd-24, tt-xd-27, tt-
Xd-30 is carried out into ＜ r ＞ controller.
102: calculate the average exhaust gas temperature of the plurality of exhaust gas temperature.
By temperature control logic by exhaust gas temperature controlling set point with measurement gas turbine exhaust gas temperature (tt-xd-1
To xd-31) be compared, and by these values from be up to minimum be ranked up, tt-xd-2 patrols in combustion monitor logical sum temperature control
Use in volume, in combustion monitor and temperature control logic, all smoke evacuation thermocouple inputs are monitored, if any one reading
When setting constant in number and controller is compared too low, this value will be abandoned.Highest minimum also will be dropped, then
Its remainder values is averaging processing, and produces a reality, accurate ttxm survey number, use for control logic.
103: startup stage gas turbine temperature control line is looked into according to the compressor pressure ratio of gas turbine, obtains exhaust gas temperature and limit
Value.
The ignition temperature of gas turbine is exhaust gas temperature and compressor pressure ratio (cpd) or exhaust gas temperature and fuel consumption measurement
Function.Ignition temperature is limited by the linear function of exhaust gas temperature and by the linear function of smoke evacuation and fsr.Temperature control
Warping procedure processed is saved in control system computer storage.
104: relatively described average exhaust gas temperature and described exhaust gas temperature limit value, obtain the temperature difference of the two.
105: the ignition temperature controlling startup stage gas turbine is adjusted according to described temperature difference, and then adjusts gas turbine
Exhaust gas temperature, reach and control the purpose that do not transfinite of unit main steam temperature.
(abscissa pressure ratio, ordinate is discharged fume to show present invention startup stage gas turbine temperature control line schematic diagram referring to Fig. 3
Temperature).In igv temperature control, original three temperature control lines, to temperature during startup stage sub-load on present Control System Software
Control line is made to optimize modification, increases a new temperature control line using in startup stage, is realized to combustion according to this newly-increased temperature control line
The ignition temperature of gas-turbine is controlled.
It should be noted that a kind of the invention also discloses control dress of Combined Cycle Unit startup stage main steam temperature
Put, show temperature control logic schematic diagram of the present invention referring to Fig. 4.This device specifically includes that
Collecting unit, for obtaining the inner side of the compressor pressure ratio of gas turbine and the smoke evacuation diffuser of gas turbine along circle
Multiple exhaust gas temperatures in week；
Computing unit, for calculating the average exhaust gas temperature of the plurality of exhaust gas temperature；
Searching unit, for looking into startup stage gas turbine temperature control line according to the compressor pressure ratio of gas turbine, is arranged
Cigarette limit temperature value
Comparing unit, for relatively described average exhaust gas temperature and described exhaust gas temperature limit value, obtains the temperature of the two
Difference；
Control unit, for adjusting, according to described temperature difference, the ignition temperature controlling startup stage gas turbine, and then adjusts
The exhaust gas temperature of whole gas turbine, reaches the purpose controlling unit main steam temperature not transfinite.
Last in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant meaning
Covering comprising of nonexcludability, so that including a series of process of key elements, method, article or equipment not only include that
A little key elements, but also include other key elements being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element being limited by sentence "including a ...", does not arrange
Remove and also there is other identical element in the process including described key element, method, article or equipment.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (4)
1. a kind of control method of Combined Cycle Unit startup stage main steam temperature is it is characterised in that include:
The inner side of the smoke evacuation diffuser of the compressor pressure ratio of acquisition gas turbine and gas turbine multiple exhaust gas temperatures circumferentially；
Calculate the average exhaust gas temperature of the plurality of exhaust gas temperature；
Startup stage gas turbine temperature control line is looked into according to the compressor pressure ratio of gas turbine, obtains exhaust gas temperature limit value；
Relatively described average exhaust gas temperature and described exhaust gas temperature limit value, obtain the temperature difference of the two；
Adjust the ignition temperature controlling startup stage gas turbine according to described temperature difference, and then adjust the smoke evacuation temperature of gas turbine
Degree, reaches the purpose controlling unit main steam temperature not transfinite.
2. method according to claim 1 is it is characterised in that also include: obtain gas turbine multiple exhaust gas temperatures it
Afterwards, determine the highest exhaust gas temperature in multiple exhaust gas temperatures and minimum exhaust gas temperature, by described highest exhaust gas temperature and described
Low exhaust gas temperature is rejected.
3. method according to claim 1 is it is characterised in that multiple exhaust gas temperatures of described acquisition gas turbine, comprising:
In the inner side of the smoke evacuation diffuser of gas turbine, multiple thermocouples are circumferentially installed, obtain multiple exhaust gas temperatures.
4. a kind of control device of Combined Cycle Unit startup stage main steam temperature is it is characterised in that include:
Collecting unit, for obtain the compressor pressure ratio of gas turbine and gas turbine smoke evacuation diffuser inner side circumferentially
Multiple exhaust gas temperatures；
Computing unit, for calculating the average exhaust gas temperature of the plurality of exhaust gas temperature；
Searching unit, for looking into startup stage gas turbine temperature control line according to the compressor pressure ratio of gas turbine, obtains smoke evacuation temperature
Degree limit value；
Comparing unit, for relatively described average exhaust gas temperature and described exhaust gas temperature limit value, obtains the temperature difference of the two；
Control unit, for adjusting, according to described temperature difference, the ignition temperature controlling startup stage gas turbine, and then adjusts combustion
The exhaust gas temperature of gas-turbine, reaches the purpose controlling unit main steam temperature not transfinite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510094427.7A CN104763537B (en) | 2015-03-03 | 2015-03-03 | Method and device for main steam temperature control at combined cycle unit starting stage |
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| CN201510094427.7A CN104763537B (en) | 2015-03-03 | 2015-03-03 | Method and device for main steam temperature control at combined cycle unit starting stage |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304689A (en) * | 2016-04-22 | 2017-10-31 | 北京澳尔金石油技术开发有限公司 | A kind of gas turbine and its whole Combined Cycle Unit temperature-adjusting device and method |
| CN107035537B (en) * | 2017-04-28 | 2018-09-25 | 申能股份有限公司 | A kind of combined cycle warming-up load dynamic matching method |
| CN108518671B (en) * | 2018-04-16 | 2019-10-25 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of waste heat boiler Main Steam Temperature Control device and control method |
| CN109812299B (en) * | 2019-01-17 | 2022-07-05 | 杭州汽轮动力集团有限公司 | Gas turbine rotor cooling adjusting method and cooling gas system |
| CN113091047B (en) * | 2021-04-02 | 2022-07-12 | 杭州华电半山发电有限公司 | Control method for main steam desuperheating water of unit |
| CN113982762B (en) * | 2021-10-27 | 2023-05-05 | 华能国际电力股份有限公司 | Early warning method for combustion temperature of gas turbine |
| CN114033555B (en) * | 2021-11-19 | 2023-05-05 | 华能国际电力股份有限公司 | Method for reducing yellow smoke discharge time |
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| CN1891980A (en) * | 2005-07-04 | 2007-01-10 | 陈培豪 | Steam power circulation and device |
| CN102997215A (en) * | 2012-06-14 | 2013-03-27 | 深圳市广前电力有限公司 | Quick start method and system of combined cycle unit |
| CN103225799A (en) * | 2013-05-09 | 2013-07-31 | 北京四方继保自动化股份有限公司 | Method for controlling main steam temperature in thermal power plant |
| US20140373540A1 (en) * | 2013-06-25 | 2014-12-25 | Mitsubishi Hitachi Power Systems, Ltd. | Start Control Unit for Steam Turbine Plant |
-
2015
- 2015-03-03 CN CN201510094427.7A patent/CN104763537B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891980A (en) * | 2005-07-04 | 2007-01-10 | 陈培豪 | Steam power circulation and device |
| CN102997215A (en) * | 2012-06-14 | 2013-03-27 | 深圳市广前电力有限公司 | Quick start method and system of combined cycle unit |
| CN103225799A (en) * | 2013-05-09 | 2013-07-31 | 北京四方继保自动化股份有限公司 | Method for controlling main steam temperature in thermal power plant |
| US20140373540A1 (en) * | 2013-06-25 | 2014-12-25 | Mitsubishi Hitachi Power Systems, Ltd. | Start Control Unit for Steam Turbine Plant |
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