CN104696077B - Fuel flow rate adjusting method and PID controller - Google Patents
Fuel flow rate adjusting method and PID controller Download PDFInfo
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- CN104696077B CN104696077B CN201510044071.6A CN201510044071A CN104696077B CN 104696077 B CN104696077 B CN 104696077B CN 201510044071 A CN201510044071 A CN 201510044071A CN 104696077 B CN104696077 B CN 104696077B
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Abstract
The present invention provides a kind of fuel flow rate adjusting methods and PID controller, this method to include：Obtain the flow difference of the last theoretical fuel flow rate exported and gas turbine measured between fuel flow rate；Obtain the power parameter difference measured between power parameter and target power parameter；Reversed correct is carried out to the power parameter difference using the flow difference and obtains revised power parameter difference；Theoretical fuel flow rate is obtained to the progress operation of revised power parameter difference using preset proportionality coefficient and is exported.It using scheme provided by the invention, can either allow to adjust fuel flow rate using larger proportionality coefficient, and be unlikely to waste the performance of controller.
Description
Technical field
The present invention relates to control technology field more particularly to a kind of fuel flow rate adjusting method and PID controllers.
Background technology
When researching and developing gas turbine control system, due to security reliability design need, in order to avoid overtemperature, excess revolutions,
Flame-out and compressor surge etc., limitation design protection, the i.e. final output of fuel flow rate would generally be added in the control of fuel flow rate
Other than the adjusting by controller, also by mechanical strength, stall margin, subsidiary engine control valve physics limit position and rate of change
It is adjusted etc. a variety of limitations.And when these restrictive conditions and controller output clash, integral saturation problem is just will produce, is made
It is shaken at fuel flow rate.
Output saturation problem belongs to an inherent characteristic in real world control system, can not be fundamentally in production and design
It eliminates, but gas turbine is because its relative complex control law and various safeguard measures make saturation problem in gas turbine control
It is relatively conventional in system, especially when gas turbine quickly starts and quickly loads load, since fuel flow rate adjustable range becomes
Change greatly, be easiest to that such problem occurs, gas turbine control performance is caused to decline, control system shakiness is even resulted in when serious
It is fixed, lead to accident.
Common solution is mainly two classes in engineering at present：First, controller parameter tune is obtained very low so that fuel
Changes in flow rate slowly transfinites without transient state；Another kind of is using integral freezing method, i.e., when the output of fuel flow rate is super
When crossing restrictive condition, the adjusting of " freezing " fuel flow rate.This 2 class method is realized simply, clear in structure, and programming is convenient, is easy to
It is realized in traditional PID (proportion integration differentiation, proportional integral differential) system, but it
The shortcomings that be exactly over-designed because limiting the startup of gas turbine and the rate of application of load, lead to opening for gas turbine
Dynamic overlong time brings certain control performance loss.
Invention content
It is an object of the invention to solve the above problems.
The present invention provides a kind of fuel flow rate adjusting methods, including：
Obtain the flow difference of the last theoretical fuel flow rate exported and gas turbine measured between fuel flow rate；
Obtain the power parameter difference measured between power parameter and target power parameter；
It is poor that revised power parameter is obtained to the reversed amendment of power parameter difference progress using the flow difference
Value；
Operation is carried out to revised power parameter difference using preset proportionality coefficient and obtains theoretical fuel flow rate and defeated
Go out.
Further, after the use flow difference obtains amendment to the reversed amendment of power parameter difference progress
Power parameter difference include：
The product that power parameter difference is subtracted to the flow difference and preset value obtains revised power parameter difference.
Further, the preset value is 1/6.
Further, the measurement fuel flow rate for obtaining the last theoretical fuel flow rate and gas turbine exported it
Between flow difference include：
Obtain the valve opening of the gas turbine；
The measurement fuel flow rate of gas turbine is calculated according to following formula：
WF=A*KV*Vlv*SPD；
Wherein, A is preset value, and WF is natural fuel flow, kv indicate the characteristic slope of valve, Vlv indicate valve opening,
SPD is gas turbine rotary speed.
Further, after the use flow difference obtains amendment to the reversed amendment of power parameter difference progress
Power parameter difference include：
The power parameter difference is reversely corrected using the flow difference, and opening using the valve controlled
It opens and closes inertia and revised power parameter difference is obtained to the power parameter difference.
The present invention provides a kind of PID controllers, including：
First acquisition module, the measurement The fuel stream for obtaining the last theoretical fuel flow rate and gas turbine exported
Flow difference between amount；
Second acquisition module, for obtaining the power parameter difference measured between power parameter and target power parameter；
Correcting module, after obtaining amendment to the reversed amendment of power parameter difference progress using the flow difference
Power parameter difference；
Output module obtains theory for carrying out operation to revised power parameter difference using preset proportionality coefficient
Fuel flow rate simultaneously exports.
Further, the correcting module is used to power parameter difference subtracting the flow difference and the product of preset value
Obtain revised power parameter difference.
Further, the preset value is 1/6.
Further, first acquisition module is used to obtain the valve opening of the gas turbine；
The measurement fuel flow rate of gas turbine is calculated according to following formula：
WF=A*KV*Vlv*SPD；
Wherein, A is preset value, and WF is natural fuel flow, kv indicate the characteristic slope of valve, Vlv indicate valve opening,
SPD is gas turbine rotary speed.
Further, the correcting module is specifically used for carrying out the power parameter difference using the flow difference anti-
To amendment, and revised power is obtained to the power parameter difference using the opening and closing inertia of the valve controlled and is joined
Number difference.
Using scheme provided by the invention, can either allow to adjust fuel flow rate using larger proportionality coefficient, and unlikely
In the performance of waste controller.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below to embodiment or existing
Attached drawing is briefly described needed in technology description, it should be apparent that, the accompanying drawings in the following description is only this hair
Some bright embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of flow diagram for fuel flow rate adjusting method that one embodiment of the invention provides；
Fig. 2 is a kind of flow diagram for fuel flow rate adjusting method that one embodiment of the invention provides；
Fig. 3 is a kind of structural schematic diagram for PID controller that one embodiment of the invention provides.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear, complete description, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of fuel flow rate adjusting methods, as shown in Figure 1, this method includes：
Step S11 is obtained between the last theoretical fuel flow rate exported and the measurement fuel flow rate of gas turbine
Flow difference；
Step S12 obtains the power parameter difference measured between power parameter and target power parameter；
Step S13 carries out reversed correct to the power parameter difference using the flow difference and obtains revised work(
Rate parameter difference；
Step S14 carries out operation to revised power parameter difference using preset proportionality coefficient and obtains theoretical fuel
Flow simultaneously exports.
In scheme provided by the invention, if the flow difference got is not 0, illustrate the last theory exported
Fuel flow rate is more than the speed that valve can actually reach, and theoretical fuel flow rate receives the limitation of boundary condition at this time, passes through
Power parameter difference is reversely corrected using the flow difference, the theoretical fuel flow rate that this is exported can be made compared to root
The theoretical fuel flow rate corrected according to original power parameter difference is smaller, in this way, enables to be exported
Theoretical fuel flow rate is adjusted close to boundary condition.If the difference got is 0, illustrate at this time theoretical fuel flow rate not by
Limitation is adjusted to boundary, the power parameter difference is reversely corrected using the flow difference obtained revised
Power parameter difference is consistent with original power parameter difference, will not influence the performance of controller at this time.It is carried using the present invention
The fuel flow rate of confession is adjusted, and controller can allow for use larger proportionality coefficient, and is unlikely to waste the performance of controller.
In the specific implementation, the measurement fuel flow rate of gas turbine is obtained in above-mentioned step S11 first.Further,
The measurement fuel flow rate of gas turbine can be obtained in several ways.A kind of optional mode is, in advance on fuel subsidiary engine
Correlative flow sensor is arranged to measure fuel flow rate, is worth to measurement The fuel stream by obtaining the measurement of flow sensor later
Amount；Or it can also be in the following way：
Obtain the valve opening of the gas turbine；
The measurement fuel flow rate of gas turbine is calculated according to following formula：
WF=A*KV*Vlv*SPD；
Wherein, A is preset value, and WF is natural fuel flow, kv indicate the characteristic slope of valve, Vlv indicate valve opening,
SPD is gas turbine rotary speed.
The measurement fuel flow rate that this mode obtains can more accurately reflect the reality entered by valve in gas turbine
Border fuel flow rate.And measurement method simple possible.
In the specific implementation, the measurement power parameter in step S12 can refer to the power obtained to gas turbine measurement
Parameter, target power parameter can refer to the power parameter indicated by the control instruction that operating personnel are exported, and power parameter can
To refer to the parameters such as rotating speed, load.
In the specific implementation, the step S13 is specifically included：Power parameter difference is subtracted the flow difference and preset
The product of value obtains revised power parameter difference.Further, preset value here can be 1/6.
In practical applications, above-mentioned step S13 can be specifically included：Using the flow difference to the power parameter
Difference is reversely corrected, and is corrected to the power parameter difference using the opening and closing inertia of the valve controlled
Power parameter difference afterwards.In the specific implementation, can rule of thumb select suitable algorithm to the unlatching of the valve of control and
The rotary speed parameter progress operation for closing inertial parameter and valve is compensated value, is carried out to power parameter difference using the offset
It corrects.
It should be pointed out that in practical applications, preset proportionality coefficient can also be used to join original power first
Number difference carries out operation and obtains theoretical fuel flow rate, uses flow difference and the product of another preset value to theoretical The fuel stream later
Amount is modified, and later exports revised theoretical fuel flow rate.The side that corresponding technical solution is provided with above-described embodiment
Case is substantially identical, and corresponding technical solution should also fall into protection scope of the present invention.
In the specific implementation, the relevant parameters such as unloaded fuel flow rate are further accounted in above-mentioned step S14, is joined according to power
The detailed process that number difference obtains theoretical fuel flow rate can be consistent with the prior art.
Below using power parameter as rotating speed, and fuel flow rate adjusting method provided by the invention is illustrated in conjunction with Fig. 2：
The difference that rotary speed instruction (corresponding to rotating speed of target value) is subtracted to rotating speed measured value subtracts flow difference and preset value
Product obtain result and be output in multiplication controller, be multiplied with preset control ratio, be added later with unloaded fuel flow rate
It obtains theoretical fuel flow rate and exports.
The present invention also provides a kind of PID controllers, as shown in figure 3, including：
First acquisition module 31, the measurement fuel for obtaining the last theoretical fuel flow rate and gas turbine exported
Flow difference between flow；
Second acquisition module 32, for obtaining the power parameter difference measured between power parameter and target power parameter；
Correcting module 33, for reversely being corrected to power parameter difference progress using the flow difference
Power parameter difference afterwards；
Output module 34 is managed for carrying out operation to revised power parameter difference using preset proportionality coefficient
By fuel flow rate and export.
PID controller provided by the invention can either allow to adjust fuel flow rate using larger proportionality coefficient, and unlikely
In the performance of waste controller.
Further, the correcting module 33 is used to power parameter difference subtracting multiplying for the flow difference and preset value
Product obtains revised power parameter difference.
Further, the preset value is 1/6.
Further, first acquisition module 31 is used to obtain the valve opening of the gas turbine；
The measurement fuel flow rate of gas turbine is calculated according to following formula：
WF=A*KV*Vlv*SPD；
Wherein, A is preset value, and WF is natural fuel flow, kv indicate the characteristic slope of valve, Vlv indicate valve opening,
SPD is gas turbine rotary speed.
Further, the correcting module 33 is specifically used for carrying out the power parameter difference using the flow difference
It is reversed to correct, and revised power is obtained to the power parameter difference using the opening and closing inertia of the valve controlled
Parameter difference.
The above description is merely a specific embodiment, and still, protection scope of the present invention is not limited to this, appoints
What those familiar with the art in the technical scope disclosed by the present invention, the variation that can be readily occurred in or replacement, all
It is covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the scope of the claims
Subject to.
Claims (10)
1. a kind of fuel flow rate adjusting method, which is characterized in that including：
Obtain the flow difference of the last theoretical fuel flow rate exported and gas turbine measured between fuel flow rate；
Obtain the power parameter difference measured between power parameter and target power parameter；
Reversed correct is carried out to the power parameter difference using the flow difference and obtains revised power parameter difference；
Theoretical fuel flow rate is obtained to the progress operation of revised power parameter difference using preset proportionality coefficient and is exported.
2. the method as described in claim 1, which is characterized in that described to use the flow difference to the power parameter difference
The reversed amendment of progress obtains revised power parameter difference and includes：
The product that power parameter difference is subtracted to the flow difference and preset value obtains revised power parameter difference.
3. method as claimed in claim 2, which is characterized in that the preset value is 1/6.
4. the method as described in claim 1, which is characterized in that described to obtain the last theoretical fuel flow rate exported and combustion
Flow difference between the measurement fuel flow rate of gas-turbine includes：
Obtain the valve opening of the gas turbine；
The measurement fuel flow rate of gas turbine is calculated according to following formula：
WF=A*KV*Vlv*SPD；
Wherein, A is preset value, and WF is natural fuel flow, and KV indicates that the characteristic slope of valve, Vlv indicate valve opening, SPD
For gas turbine rotary speed.
5. the method as described in claim 1, which is characterized in that described to use the flow difference to the power parameter difference
The reversed amendment of progress obtains revised power parameter difference and includes：
The power parameter difference is reversely corrected using the flow difference, and using the unlatching of valve controlled and
Inertia is closed the power parameter difference is modified to obtain revised power parameter difference.
6. a kind of proportional integral differential PID controller, which is characterized in that including：
First acquisition module, for obtain the last theoretical fuel flow rate and gas turbine exported measurement fuel flow rate it
Between flow difference；
Second acquisition module, for obtaining the power parameter difference measured between power parameter and target power parameter；
Correcting module obtains revised work(for carrying out reversed correct to the power parameter difference using the flow difference
Rate parameter difference；
Output module obtains theoretical fuel for carrying out operation to revised power parameter difference using preset proportionality coefficient
Flow simultaneously exports.
7. controller as claimed in claim 6, which is characterized in that the correcting module is used to power parameter difference subtracting institute
The product for stating flow difference and preset value obtains revised power parameter difference.
8. controller as claimed in claim 7, which is characterized in that the preset value is 1/6.
9. controller as claimed in claim 6, which is characterized in that first acquisition module is for obtaining the gas turbine
Valve opening；
The measurement fuel flow rate of gas turbine is calculated according to following formula：
WF=A*KV*Vlv*SPD；
Wherein, A is preset value, and WF is natural fuel flow, and KV indicates that the characteristic slope of valve, Vlv indicate valve opening, SPD
For gas turbine rotary speed.
10. controller as claimed in claim 6, which is characterized in that the correcting module is specifically used for using the difference in flow
Value reversely corrects the power parameter difference, and using the opening and closing inertia of the valve controlled to the power
Parameter difference is modified to obtain revised power parameter difference.
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| CN201510044071.6A CN104696077B (en) | 2015-01-28 | 2015-01-28 | Fuel flow rate adjusting method and PID controller |
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| CN201510044071.6A CN104696077B (en) | 2015-01-28 | 2015-01-28 | Fuel flow rate adjusting method and PID controller |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105003341B (en) * | 2015-06-23 | 2017-06-16 | 中国航空工业集团公司西安飞机设计研究所 | A kind of engine oil flow regulating control system and control method |
| CN107100743B (en) * | 2017-04-28 | 2019-03-22 | 申能股份有限公司 | A kind of combustion engine automatic combustion regulating system and adjusting method |
| CN109976145B (en) * | 2019-04-16 | 2022-03-25 | 新奥能源动力科技（上海）有限公司 | Method for adjusting PID parameters, main controller and storage medium |
| CN110173358A (en) * | 2019-06-18 | 2019-08-27 | 中国船舶重工集团公司第七0三研究所 | It is a kind of power generation with free-turbine engine removal of load when method for adjusting rotation speed |
| CN111219258B (en) * | 2020-03-04 | 2021-12-28 | 中国科学院工程热物理研究所 | PI controller design method for preventing integral saturation in engine control strategy switching |
| CN112761796B (en) * | 2020-12-29 | 2021-09-28 | 中国航发控制系统研究所 | Power closed-loop control system and method thereof |
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| CN101203668A (en) * | 2005-06-23 | 2008-06-18 | 三菱重工业株式会社 | Gas turbine controller and gas turbine system |
| CN102720590A (en) * | 2012-07-12 | 2012-10-10 | 株洲南方燃气轮机成套制造安装有限公司 | Starting control method and device of combustion gas turbine |
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| DE10127289A1 (en) * | 2001-06-05 | 2002-12-12 | Alstom Switzerland Ltd | Fuel supply system derives second desired fuel flow rate value from first desired determined by control unit and selected so burner system is essentially supplied with first desired value |
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|---|---|---|---|---|
| US4201923A (en) * | 1974-08-08 | 1980-05-06 | Westinghouse Electric Corp. | Combined cycle electric power plant and a gas turbine having improved megawatt load control |
| CN1560452A (en) * | 2004-03-11 | 2005-01-05 | 北京航空航天大学 | Apparatus of controlling gasoline of mini-turbine jet engine |
| CN101203668A (en) * | 2005-06-23 | 2008-06-18 | 三菱重工业株式会社 | Gas turbine controller and gas turbine system |
| CN102720590A (en) * | 2012-07-12 | 2012-10-10 | 株洲南方燃气轮机成套制造安装有限公司 | Starting control method and device of combustion gas turbine |
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Effective date of registration: 20191225 Address after: 102209 Beijing Changping District in the future of the national electric investment group Park in the future science city south of Beijing Patentee after: China United heavy-duty gas turbine technology Co., Ltd. Address before: 100084, Beijing, Haidian District science and Technology Park, Tsinghua Science and technology building, block C, 10 Patentee before: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. |
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