CN112983652B - Gas inlet control system of gas turbine - Google Patents
Gas inlet control system of gas turbine Download PDFInfo
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- CN112983652B CN112983652B CN202110270636.8A CN202110270636A CN112983652B CN 112983652 B CN112983652 B CN 112983652B CN 202110270636 A CN202110270636 A CN 202110270636A CN 112983652 B CN112983652 B CN 112983652B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/48—Control of fuel supply conjointly with another control of the plant
- F02C9/50—Control of fuel supply conjointly with another control of the plant with control of working fluid flow
- F02C9/54—Control of fuel supply conjointly with another control of the plant with control of working fluid flow by throttling the working fluid, by adjusting vanes
Abstract
The invention relates to a gas turbine inlet control system, comprising: the well accuse unit through according to real-time carbon deposit thickness detects the governing valve of data adjustment setting on the nozzle and sets up with the stator angle of opening and shutting on the compressor that the combustion chamber is connected to confirm initial stator angle of opening and shutting and governing valve degree of opening and shutting, simultaneously, set up the detection interval, detect the carbon deposit thickness again after detecting the interval and revise stator angle of opening and shutting and governing valve parameter, whole testing process is periodic, in order to realize the gas turbine stator angle of opening and shutting and the continuous accurate control of governing valve degree of opening and shutting, acquire the best combustion effect.
Description
Technical Field
The invention belongs to the field of control, and particularly relates to an air inlet control system of a gas turbine.
Background
In the main flow of air and gas of the gas Turbine, only the gas Turbine consisting of three parts, namely a Compressor (Compressor), a combustion chamber (Combustor) and a gas Turbine (Turbine), circulates, generally called as simple circulation, the Compressor sucks air from the external atmospheric environment, and the air is compressed step by the axial-flow Compressor to be supercharged, and meanwhile, the air temperature is correspondingly increased; compressed air is pumped into a combustion chamber and is mixed with injected fuel to be combusted to generate high-temperature and high-pressure gas; then the gas enters a turbine to do work through expansion, the turbine is pushed to drive a gas compressor and an external load rotor to rotate at a high speed, the chemical energy of gas or liquid fuel is partially converted into mechanical work, electric power is output, waste gas discharged from the turbine is discharged to the atmosphere to release heat naturally, the gas turbine is widely applied, but the existing gas turbine has the following problems:
1. the existing pneumatic method of the gas turbine lacks a control method for adjusting the guide vanes and the fuel input quantity of the gas compressor by combining the combustion condition in the combustion chamber;
2. the traditional gas turbine has poor combustion efficiency, the long combustion chamber has carbon deposition effect, and no method for adjusting the guide vane of the gas compressor aiming at the carbon deposition condition exists.
Disclosure of Invention
The present invention is directed to solving the above problems, and to this end, the present invention provides a gas turbine intake control system, comprising:
the gas inlet of a gas compressor of the gas turbine is provided with a guide vane for controlling the gas inlet flow of the gas turbine; a feed port is arranged in a combustion chamber of the gas turbine, a nozzle is arranged on the feed port and used for injecting fuel into the combustion chamber, and an adjusting valve is arranged on the nozzle and used for controlling the flow of the fuel injected into the combustion chamber;
an ultrasonic detection device which is arranged outside a combustion chamber of the gas turbine and is used for detecting the carbon deposit thickness of the inner wall of the combustion chamber;
the central control unit is electrically connected with the regulating valve and the guide vane, is used for processing data, controls the guide vane and the regulating valve of the gas compressor in the gas turbine, controls the ultrasonic detection device to detect the deposited carbon thickness of the inner wall of the combustion chamber in real time and obtains the deposited carbon thickness real-time detection data; adjusting the opening and closing degree of the regulating valve and the opening and closing angle of the guide vane according to the carbon deposition thickness real-time detection data,
the central control unit firstly determines the initial guide vane opening and closing angle and the adjusting valve opening and closing degree, a first detection interval T1 is preset in the central control unit, the central control unit controls the ultrasonic detection device to detect the carbon deposition thickness of the inner wall of the combustion chamber again after T1 time, the inner wall of the combustion chamber is divided into a main combustion area and a blending area, the guide vane opening and closing angle and the adjusting valve opening and closing degree are readjusted according to the carbon deposition thickness and the carbon deposition rate of different areas in the inner wall of the combustion chamber, and the process comprises the following steps:
step S1, firstly, adjusting the opening and closing angle of the guide vane and the opening and closing degree of an adjusting valve according to the change condition of the carbon deposit thickness in the main combustion area, and selecting guide vane adjusting parameters and adjusting valve adjusting parameters according to the carbon deposit rate of the main combustion area;
s2, after the guide vane adjusting parameters and the adjusting valve adjusting parameters are selected, the opening and closing angle of the guide vane and the opening and closing degree of the adjusting valve are adjusted according to the carbon deposit thickness change condition in the blending area, and the final opening and closing angle of the guide vane and the final opening and closing degree of the adjusting valve are determined by further correcting the selected guide vane adjusting parameters and the selected adjusting valve adjusting parameters in S1;
step S3, presetting a second detection interval T2 in the central control unit, controlling the ultrasonic detection device to detect the carbon deposit thickness in the combustion chamber again after T2 time, detecting the carbon deposit thickness on the inner wall of the combustion chamber, determining the carbon deposit thickness, judging whether the adjustment meets the expected standard, and repeating S1, S2 and S3 if the adjustment does not meet the expected standard until the adjustment meets the expected standard;
a cycle detection period T3 is arranged in the central control unit, and when the adjustment is judged to meet the expected standard in S3, S1, S2 and S3 are repeated after the cycle detection period T3.
Further, a compressor guide vane control matrix Y (Y1, Y2, Y3, Y4) is arranged in the central control unit, wherein: y1 represents a first opening and closing angle of a guide vane, Y2 represents a second opening and closing angle of the guide vane, Y3 represents a third opening and closing angle of the guide vane, Y4 represents a fourth opening and closing angle of the guide vane, Y4> Y3> Y2> Y1, a regulating valve control matrix T (T1, T2, T3 and T4) is further arranged in the central control unit, wherein the T1 represents the first opening and closing degree, T2 represents the second opening and closing degree, T3 represents the third opening and closing degree, T4 represents the fourth opening and closing degree, T4> T3> T2> T1, and in the step S2, the central control unit controls the ultrasonic detection device to detect the real-time carbon deposit thickness in each position of the inner wall of the combustion chamber in real time, the real-time average thickness Si is obtained after the real-time thickness in each position of the inner wall is summed, and the initial opening and closing angle and regulating valve opening and closing degree are determined according to the average thickness Si.
Further, when the central control unit determines the initial opening and closing angle of the guide vane and the opening and closing degree of the regulating valve according to the average thickness Si, the process includes: thickness contrast parameters S1, S2, S3 and S4 are preset in the central control unit,
initially, the central control unit controls the guide vanes of the air compressor air inlet to open and close at a guide vane second opening and closing angle Y2, and controls the opening and closing degree of the regulating valve to be a second opening and closing degree T2;
when Si is less than or equal to S1, the central control unit controls guide vanes of the air inlet of the air compressor to maintain the original opening and closing angle and controls the regulating valve to maintain the original opening and closing degree;
when S1< Si is not more than S2, the central control unit controls guide vanes in the air inlet of the compressor to open and close at a guide vane third opening angle Y3, and controls the regulating valve to be a third opening degree T3;
and when S2< Si is not more than S3, the central control unit controls the guide vane of the air inlet in the compressor to open and close at a fourth opening angle of the guide vane, and controls the regulating valve to be a fourth opening degree T4.
Further, the central control unit controls the ultrasonic detection device to detect the real-time thickness of the inner wall of the combustion chamber again after a preset T1 interval, and at this time, divides the combustion chamber into two areas, which include: the main combustion area is positioned at the head part of the combustion chamber, the blending area is positioned in the middle part of the combustion chamber, an air inlet bypass pipeline and a corresponding bypass control valve are arranged in the blending area, the ultrasonic detection device acquires the fuel carbon deposit thickness in the two areas, and a combustion chamber carbon deposit thickness matrix ST1 (ST 11, ST 12) at the time of T1 is generated, wherein: ST11 represents the actual soot thickness of the main burning zone at time T1, ST12 represents the actual soot thickness of the doping zone at time T1; and adjusting the opening and closing angle of the guide vane, the adjusting valve and the bypass control valve according to data in the combustion chamber carbon deposit thickness matrix ST1 (ST 11, ST 12), and determining the opening and closing angle of the guide vane and the opening degree of the adjusting valve.
Further, a combustion chamber carbon deposit thickness matrix ST0 (ST 01, ST 02) at the initial moment is arranged in the central control unit, wherein: ST01 represents the initial detection thickness of the main burning zone, ST02 represents the initial detection thickness of the mixing zone; the central control unit obtains the main combustion area carbon deposit thickness difference value C1 and the blending area carbon deposit thickness difference value C2 by comparing data in the combustion chamber carbon deposit thickness matrix ST1 (ST 11, ST 12) at the time T1 and the combustion chamber carbon deposit thickness matrix ST0 (ST 01, ST 02) at the initial time, calculates the carbon deposit speed V01, V02, V03, V0i = C0i/T1, i =1,2,3 of the corresponding area, and determines the opening and closing angle of the guide vane and the opening and closing degree of the regulating valve according to the carbon deposit thickness difference value and the carbon deposit speed, and comprises the following steps of:
when the operation of the step S1 is performed, if the main combustion zone carbon deposit difference value C1 is smaller than a preset comparison parameter C01, the guide vane maintains an original opening and closing angle, the adjusting valve maintains an original opening and closing degree, if the main combustion zone carbon deposit difference value C1 is greater than a preset comparison parameter C01, the opening and closing angle of the guide vane is increased while the opening and closing degree of the adjusting valve is adjusted, and a guide vane adjusting parameter and an adjusting valve adjusting parameter are selected according to the carbon deposit rate of the main combustion zone;
when the operation of the step S2 is performed, if the carbon deposit difference value C2 in the blending region is smaller than the preset contrast parameter C02, the guide vane adjusting parameter and the adjusting valve adjusting parameter are not corrected, the opening degree of the adjusting valve maintains the original opening degree, and if the carbon deposit difference value C2 in the blending region is greater than the preset contrast parameter C02, the step S1 is further corrected by the selected guide vane adjusting parameter and the adjusting valve adjusting parameter.
Further, a guide vane opening and closing angle parameter selection matrix Y1(Y11, Y12, Y13 and Y14) is arranged in the central control unit, wherein Y11 represents a first guide vane adjusting parameter, Y12 represents a second guide vane adjusting parameter, Y13 represents a third guide vane adjusting parameter, Y14 represents a fourth guide vane adjusting parameter, Y11 is more than Y12 is more than Y13 is more than Y14; a regulator valve adjustment parameter adjustment matrix T1(T11, T12, T13, T14) is also provided, wherein: t11 denotes control valve first manipulated variable, T12 denotes control valve second manipulated variable, T13 denotes control valve third manipulated variable, T4 denotes control valve fourth manipulated variable, T11< T12< T13< T14; carbon deposit rate comparison parameters V01, V02 and V03 are further arranged, and when the central control unit determines the guide vane adjusting parameters and the adjusting valve adjusting parameters:
and if the carbon deposition rate V1 in the main combustion zone is not more than V01, the central control unit selects the first guide vane adjusting parameter Y11 as a guide vane adjusting parameter, and selects the first adjusting parameter T11 as an adjusting valve adjusting parameter.
And if the carbon deposition rate V01 in the main combustion zone is not more than V1 and less than V02, the central control unit selects a guide vane second adjusting parameter Y12 as a guide vane adjusting parameter, and selects an adjusting valve second adjusting parameter T12 as an adjusting valve adjusting parameter.
And if the carbon deposition rate VO2 in the main combustion zone is not more than V1 and less than V03, the central control unit selects the third guide vane adjusting parameter Y13 as a guide vane adjusting parameter, and selects the third adjusting parameter T13 of the adjusting valve as an adjusting valve adjusting parameter.
If the carbon deposition rate V03 in the main combustion zone is not more than V1, the central control unit selects a guide vane fourth adjusting parameter Y14 as a guide vane adjusting parameter, and selects an adjusting valve fourth adjusting parameter T14 as an adjusting valve adjusting parameter;
a guide vane correction coefficient Y2(Y21, Y22, Y23 and Y24) is further arranged in the central control unit, wherein Y21 represents a first guide vane correction parameter, Y22 represents a second guide vane correction parameter, Y23 represents a third guide vane correction parameter, Y24 represents a fourth guide vane correction parameter, Y21< Y22< Y23< Y24; a regulator valve adjustment parameter adjustment matrix T2(T21, T22, T23, T24) is also provided, wherein: t21 represents the regulator valve first correction parameter, T22 represents the regulator valve second correction parameter, T23 represents the regulator valve third correction parameter, T24 represents the regulator valve fourth correction parameter, T21< T22< T23< T24; after the guide vane adjusting parameter and the adjusting valve adjusting parameter are selected, the guide vane adjusting parameter and the adjusting valve adjusting parameter are corrected according to the carbon deposition rate V2 in the mixing region, and the method comprises the following steps:
if the carbon deposition rate V1 in the main combustion zone is not more than V01, the central control unit selects a guide vane first correction parameter Y21 as a guide vane correction number and selects an adjusting valve first adjusting parameter T21 as an adjusting valve correction parameter;
and if the carbon deposition rate V01 in the main combustion zone is not more than V1 and less than V02, the central control unit selects a guide vane second correction parameter Y22 as a guide vane correction parameter, and selects an adjusting valve second adjusting parameter T22 as an adjusting valve correction parameter.
And if the carbon deposition rate VO2 in the main combustion zone is not more than V1 and less than V03, the central control unit selects a guide vane third correction parameter Y23 as a guide vane correction parameter, and selects an adjusting valve third adjusting parameter T23 as an adjusting valve correction parameter.
And if the carbon deposition rate V03 in the main combustion zone is not more than V1, the central control unit selects the guide vane fourth correction parameter Y24 as the guide vane correction parameter and selects the regulating valve fourth regulating parameter T24 as the regulating valve correction parameter.
Further, the central control unit selects the guide vane adjusting parameter, the guide vane correcting parameter, the regulating valve adjusting parameter and the regulating valve correcting parameter, then calculates a final guide vane adjusting parameter G1, G1= Yi + Y1i + Y2i, calculates a final regulating valve adjusting parameter G2, G2= Ti + T1i-T2i, wherein i =1,2,3,4, Yi represents an initial guide vane rotation opening and closing angle degree, Ti represents an initial regulating valve opening and closing degree, Y1i represents a guide vane ith adjusting parameter, Y2i represents a guide vane ith correcting parameter, T1i represents a regulating valve ith adjusting parameter, T2i represents a regulating valve ith correcting coefficient, and finally adjusts the opening and closing angle of the guide vane to G1 and adjusts the regulating valve opening and closing degree to G2.
Further, the central control unit is provided with contrast parameters v1, v2, S3, the central control unit judges whether the adjustment meets the expected standard, calculates the carbon deposit thickness at the T2 moment in the main combustion zone and the blending zone according to the detection data of the ultrasonic detection device, calculates the difference value between the carbon deposit thickness at the T2 moment and the carbon deposit thickness at the T1 moment, c1 and c2, wherein c1 represents the carbon deposit thickness difference value of the main combustion zone, c2 represents the carbon deposit thickness difference value of the blending zone,
if c1< v1 and c2< v2, the carbon deposit thickness is judged to meet the expected standard, otherwise, the carbon deposit thickness is judged not to meet the expected standard.
Compared with the prior art, the method has the technical effects that the adjusting valve arranged on the nozzle and the guide vane opening and closing angle arranged on the gas compressor connected with the combustion chamber are adjusted according to the real-time carbon deposition thickness detection data to determine the initial guide vane opening and closing angle and the adjusting valve opening and closing degree, meanwhile, the detection interval is set, the carbon deposition thickness is detected again after the detection interval, the guide vane opening and closing angle and the adjusting valve parameter are corrected, the whole detection process is periodic, so that the continuous and accurate control of the guide vane opening and closing angle and the adjusting valve opening and closing degree in the gas turbine is realized, and the optimal combustion effect is obtained.
Particularly, a compressor guide vane control matrix Y (Y1, Y2, Y3 and Y4) and a regulating valve control matrix T (T1, T2, T3 and T4) are arranged in the central control unit, the opening and closing angle of the guide vane and the opening and closing degree of the regulating valve of the gas turbine are determined according to the thickness of carbon deposit in the combustion chamber, in fact, the combustion effect can be increased without simply increasing the air intake amount or increasing the fuel amount during combustion in the combustion chamber, and the carbon deposit in the blending region is increased due to the fact that part of cold air enters the blending region due to too large air amount and too small gas amount, so that the fuel is correspondingly increased when the air intake amount is increased, the optimal air and fuel ratio is determined, and the accurate control on the opening and closing angle and the fuel ejection of the guide vane of the gas turbine can be realized, according to the accurate control on the opening and closing angle and the fuel ejection of the gas turbine, thereby the combustion effect of the gas turbine is improved, the energy utilization rate and power are improved.
Particularly, a guide vane opening and closing angle parameter selection matrix Y1(Y11, Y12, Y13 and Y14) and an adjusting valve adjustment parameter adjustment matrix T1(T11, T12, T13 and T14) are arranged in the central control unit, the carbon deposit thickness and the carbon deposit speed in a main combustion zone and a blending zone in a combustion chamber are measured, guide vane and adjusting valve adjustment parameters are selected according to the carbon deposit speed in the main combustion zone, and correction parameters of the guide vane and the adjusting valve are selected according to the carbon deposit speed in the blending zone.
Particularly, the central control unit is provided with comparison parameters v1 and v2, whether the step three is effective or not is judged, if the step three is not effective, the step three is continuously repeated, the opening and closing angle of the guide vane and the inlet amount of the regulating valve are regulated in a new round, the control result is ensured to be more accurate, the gas turbine obtains a better combustion effect, and the working efficiency of the gas turbine is improved.
In particular, the whole control process of the invention is periodic control, which is convenient for realizing long-term and accurate control of the gas turbine and ensures the working efficiency of the gas turbine.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional axial flow based gas turbine according to an embodiment of the present invention.
FIG. 2 is a schematic view of a combustion chamber zoned configuration provided by an embodiment of the present invention
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is a schematic diagram of a gas turbine based on three-dimensional axial flow according to an embodiment of the present invention, an air inlet control system of a gas turbine according to the embodiment includes:
the gas inlet of a gas compressor 3 of the gas turbine is provided with a guide vane 2 for controlling the gas inlet flow of the gas turbine; a feed inlet is arranged in the combustion chamber 4 of the gas turbine, a nozzle is arranged on the feed inlet and used for injecting fuel into the combustion chamber 4, and an adjusting valve 6 is arranged on the nozzle and used for controlling the flow of the fuel injected into the combustion chamber 4; the gas turbine also comprises a gas turbine 5,
an ultrasonic detection device 7 provided outside the gas turbine combustion chamber 4 for detecting the carbon deposit thickness on the inner wall of the combustion chamber 4;
the central control unit 1 is electrically connected with the regulating valve 6 and the guide vane 2, is used for processing data, controls the guide vane 2 and the regulating valve 6 in the gas turbine, controls the ultrasonic detection device 7 to detect the carbon deposition thickness of the inner wall of the combustion chamber 4 in real time, and obtains real-time detection data of the carbon deposition thickness; adjusting the opening and closing degree of the regulating valve 6 and the opening and closing angle of the guide vane 2 according to the carbon deposition thickness real-time detection data,
well accuse unit 1 confirms initial stator angle and the 6 degree of opening and shutting of governing valve at first, predetermine first detection interval T1 in the well accuse unit, T1 time back well accuse unit 1 control ultrasonic detection device 7 detects the carbon deposit thickness of combustion chamber 4 inner wall once more to divide combustion chamber 4 inner wall into main combustion area and blending area, according to the carbon deposit thickness and the carbon deposit speed in the different regions in the combustion chamber 4 inner wall readjust the stator angle of opening and shutting with the degree of opening and shutting of governing valve 6, its process includes:
step S1, firstly, adjusting the opening and closing angle of the guide vane 2 and the opening and closing degree of the adjusting valve 6 according to the change condition of the carbon deposit thickness in the main combustion area, and selecting guide vane adjusting parameters and adjusting valve adjusting parameters according to the carbon deposit rate of the main combustion area;
s2, after the guide vane adjusting parameters and the adjusting valve adjusting parameters are selected, the opening and closing angle of the guide vane and the opening and closing degree of the adjusting valve are adjusted according to the change condition of the carbon deposit thickness in the blending area, and the final opening and closing angle of the guide vane and the final opening and closing degree of the adjusting valve are determined by further correcting the selected guide vane adjusting parameters and the selected adjusting parameters of the adjusting valve in S1;
step S3, presetting a second detection interval T2 in the central control unit 1, controlling the ultrasonic detection device 7 to detect the carbon deposit in the combustion chamber 4 again after T2 time, detecting the carbon deposit thickness of the inner wall of the combustion chamber 4, determining the carbon deposit thickness, judging whether the adjustment meets an expected standard, and repeating S1, S2 and S3 if the adjustment does not meet the expected standard until the adjustment meets the expected standard;
a cycle detection period T3 is provided in the center control unit 1, and when the adjustment is determined to meet the expected standard in S3, S1, S2 and S3 are repeated after the cycle detection period T3.
Specifically, a compressor 3 guide vane control matrix Y (Y1, Y2, Y3, Y4) is arranged in the central control unit 1, wherein: y1 represents a first opening and closing angle of a guide vane, Y2 represents a second opening and closing angle of the guide vane, Y3 represents a third opening and closing angle of the guide vane, Y4 represents a fourth opening and closing angle of the guide vane, Y4> Y3> Y2> Y1, a regulating valve control matrix T (T1, T2, T3 and T4) is further arranged in the central control unit 1, wherein the T1 represents the first opening and closing degree, T2 represents the second opening and closing degree, T3 represents the third opening and closing degree, T4 represents the fourth opening and closing degree, T4> T3> T2> T1, in the step S2, the central control unit 1 controls the ultrasonic detection device 7 to detect the real-time carbon deposit thickness of the inner wall of the combustion chamber 4 in real time, the real-time average thickness Si is obtained after the summation of the real-time thicknesses of the inner wall of the combustion chamber, and the initial opening and closing angle and the regulating valve are determined according to the average thickness Si.
Specifically, when the central control unit 1 determines the initial opening and closing angle of the guide vane and the opening and closing degree of the regulating valve according to the average thickness Si, the process includes: thickness contrast parameters S1, S2, S3 and S4 are preset in the central control unit 1,
initially, the central control unit 1 controls the guide vane 2 of the air inlet of the compressor 3 to open and close at a second opening and closing angle Y2 of the guide vane, and controls the opening and closing degree of the regulating valve to be a second opening and closing degree T2;
when Si is less than or equal to S1, the central control unit 1 controls the guide vane 2 of the air inlet of the compressor 3 to maintain the original opening and closing angle and controls the regulating valve to maintain the original opening and closing degree;
when S1< Si is not more than S2, the central control unit 1 controls the guide vane 2 in the air inlet of the compressor 3 to open and close at a guide vane third opening angle Y3, and controls the regulating valve to be a third opening degree T3;
and when S2< Si is not more than S3, the central control unit 1 controls the guide vane 2 of the air inlet in the compressor 3 to open and close at a fourth opening angle of the guide vane, and controls the regulating valve to be at a fourth opening degree T4.
Specifically, the central control unit 1 controls the ultrasonic detection device 7 to detect the real-time thickness of each part of the inner wall of the combustion chamber again after a preset T1 interval, and at this time, divides the combustion chamber 4 into two regions including: the main combustion zone 41 and the blending zone 42 are located at the head of the combustion chamber 4, the blending zone is located at the middle of the combustion chamber 4, an air inlet bypass pipeline and a corresponding bypass control valve are arranged in the blending zone, the ultrasonic detection device 7 acquires the fuel coke thickness in the two zones, and a coke thickness matrix ST1 (ST 11, ST 12) of the combustion chamber 4 at the time of T1 is generated, wherein: ST11 represents the actual soot thickness of the main combustion zone at the time T1, ST12 represents the actual soot thickness of the blending zone at the time T1; and adjusting the opening and closing angle of the guide vane, the adjusting valve and the bypass control valve according to data in the carbon deposit thickness matrix ST1 (ST 11, ST 12) of the combustion chamber 4, and determining the opening and closing angle of the guide vane and the opening degree of the adjusting valve.
In practical application, if the thickness of the carbon deposit in the main combustion area 41 does not meet the standard and is too thick, the ignition time is too late or the combustion condition is insufficient; if the carbon deposit thickness of the mixing zone 42 does not meet the standard and is too thick, the cooling air is more, and the combustion in the previous section is insufficient, so that more fuel particles are attached to the mixing zone 42, and the carbon deposit thickness in the zone is too thick; if the thickness of the carbon deposit at the tail part of the combustion chamber does not meet the standard and is too thick, the strength of the injected gas is too large, the injected gas is not fully combusted in the main combustion area 41 and is taken away to the tail part of the combustion chamber 4 by the air, and the thickness of the carbon deposit at the tail part is increased.
Specifically, referring to fig. 2, further, a charcoal deposit thickness matrix ST0 (ST 01, ST 02) of the combustion chamber 4 at the initial moment is arranged in the central control unit 1, wherein: ST01 represents the initial detection thickness of the main burning zone, ST02 represents the initial detection thickness of the mixing zone; the central control unit 1 obtains the main combustion zone carbon deposit thickness difference value C1 and the blending zone carbon deposit thickness difference value C2 by comparing the data in the combustion chamber 4 carbon deposit thickness matrix ST1 (ST 11, ST 12) at the time T1 with the initial combustion chamber 4 carbon deposit thickness matrix ST0 (ST 01, ST 02), calculates the carbon deposit rates V01, V02, V03, V0i = C0i/T1, i =1,2,3 of the corresponding zones, and determines the opening and closing angle of the guide vane and the opening and closing degree of the regulating valve according to the carbon deposit thickness difference value and the carbon deposit rate, and comprises the following steps:
when the operation of the step S1 is performed, if the main combustion zone carbon deposit difference value C1 is smaller than a preset comparison parameter C01, the guide vane maintains an original opening and closing angle, the adjusting valve maintains an original opening and closing degree, if the main combustion zone carbon deposit difference value C1 is greater than a preset comparison parameter C01, the opening and closing angle of the guide vane is increased while the opening and closing degree of the adjusting valve is adjusted, and a guide vane adjusting parameter and an adjusting valve adjusting parameter are selected according to the carbon deposit rate of the main combustion zone;
when the operation of the step S2 is performed, if the coking difference value C2 in the blending region is smaller than the preset comparison parameter C02, the guide vane adjustment parameter and the adjustment valve adjustment parameter are not corrected, the opening degree of the adjustment valve maintains the original opening degree, and if the coking difference value C2 in the blending region is greater than the preset comparison parameter C02, the selected guide vane adjustment parameter and the adjustment valve adjustment parameter are further corrected in the step S1.
Specifically, a guide vane opening and closing angle parameter selection matrix Y1(Y11, Y12, Y13 and Y14) is arranged in the central control unit 1, wherein Y11 represents a first guide vane adjusting parameter, Y12 represents a second guide vane adjusting parameter, Y13 represents a third guide vane adjusting parameter, Y14 represents a fourth guide vane adjusting parameter, Y11 is more than Y12, more than Y13 is more than Y14; a regulator valve adjustment parameter adjustment matrix T1(T11, T12, T13, T14) is also provided, wherein: t11 denotes control valve first manipulated variable, T12 denotes control valve second manipulated variable, T13 denotes control valve third manipulated variable, T4 denotes control valve fourth manipulated variable, T11< T12< T13< T14; carbon deposit rate comparison parameters V01, V02 and V03 are also arranged, and when the central control unit 1 determines the guide vane adjusting parameters and the adjusting valve adjusting parameters:
and if the carbon deposition rate V1 in the main combustion zone is not more than V01, the central control unit 1 selects a first guide vane adjusting parameter Y11 as a guide vane adjusting parameter, and selects a first adjusting parameter T11 of an adjusting valve as an adjusting valve adjusting parameter.
And if the carbon deposition rate V01 in the main combustion zone is not more than V1 and less than V02, selecting a second guide vane adjusting parameter Y12 as a guide vane adjusting parameter and selecting a second adjusting parameter T12 of an adjusting valve as an adjusting parameter of the adjusting valve by the central control unit 1.
And if the carbon deposition rate VO2 in the main combustion zone is not more than V1 and less than V03, the central control unit 1 selects the third guide vane adjusting parameter Y13 as a guide vane adjusting parameter, and selects the third adjusting parameter T13 of the adjusting valve as an adjusting valve adjusting parameter.
If the carbon deposition rate V03 in the main combustion zone is not more than V1, the central control unit 1 selects a guide vane fourth adjusting parameter Y14 as a guide vane adjusting parameter, and selects an adjusting valve fourth adjusting parameter T14 as an adjusting valve adjusting parameter;
a guide vane correction coefficient Y2(Y21, Y22, Y23 and Y24) is further arranged in the central control unit 1, wherein Y21 represents a first guide vane correction parameter, Y22 represents a second guide vane correction parameter, Y23 represents a third guide vane correction parameter, Y24 represents a fourth guide vane correction parameter, Y21< Y22< Y23< Y24; there is also provided a trim valve adjustment parameter adjustment matrix T2(T21, T22, T23, T24), wherein: t21 represents the regulator valve first correction parameter, T22 represents the regulator valve second correction parameter, T23 represents the regulator valve third correction parameter, T24 represents the regulator valve fourth correction parameter, T21< T22< T23< T24; after the guide vane adjusting parameter and the adjusting valve adjusting parameter are selected, the guide vane adjusting parameter and the adjusting valve adjusting parameter are corrected according to the carbon deposit rate V2 in the mixing area, and the method comprises the following steps:
if the carbon deposition rate V1 in the main combustion zone is not more than V01, the central control unit 1 selects a guide vane first correction parameter Y21 as a guide vane correction number and selects an adjusting valve first adjusting parameter T21 as an adjusting valve correction parameter;
and if the carbon deposition rate V01 in the main combustion zone is not more than V1 and less than V02, the central control unit 1 selects a guide vane second correction parameter Y22 as a guide vane correction parameter, and selects an adjusting valve second adjusting parameter T22 as an adjusting valve correction parameter.
And if the carbon deposition rate VO2 in the main combustion zone is not more than V1 and less than V03, the central control unit 1 selects a guide vane third correction parameter Y23 as a guide vane correction parameter, and selects an adjusting valve third adjusting parameter T23 as an adjusting valve correction parameter.
And if the carbon deposition rate V03 in the main combustion zone is not more than V1, the central control unit 1 selects the guide vane fourth correction parameter Y24 as the guide vane correction parameter and selects the regulating valve fourth regulation parameter T24 as the regulating valve correction parameter.
Specifically, the central control unit 1 selects the guide vane adjusting parameter, the guide vane correcting parameter, the regulating valve adjusting parameter, and the regulating valve correcting parameter, calculates a final guide vane adjusting parameter G1, G1= Yi + Y1i + Y2i, calculates a final regulating valve adjusting parameter G2, G2= Ti + T1i-T2i, where i =1,2,3,4, Yi represents an initial guide vane rotation opening and closing angle degree, Ti represents an initial regulating valve opening and closing degree, Y1i represents a guide vane ith adjusting parameter, Y2i represents a guide vane ith correcting parameter, T1i represents a regulating valve ith adjusting parameter, T2i represents a regulating valve ith correcting coefficient, and finally adjusts the opening and closing angle of the guide vane to G1 and adjusts the regulating valve opening and closing degree to G2.
Specifically, the central control unit 1 is provided with contrast parameters v1, v2, S3, the central control unit 1 judges whether the adjustment meets the expected standard, calculates the carbon deposit thickness at the T2 moment in the main combustion area and the blending area according to the detection data of the ultrasonic detection device 7, and calculates the difference value between the carbon deposit thickness at the T2 moment and the carbon deposit thickness at the T1 moment, c1, c2, wherein c1 represents the carbon deposit thickness difference value in the main combustion area, c2 represents the carbon deposit thickness difference value in the blending area,
if c1< v1 and c2< v2, the carbon deposit thickness is judged to meet the expected standard, otherwise the carbon deposit thickness is judged not to meet the expected standard.
Specifically, the central control unit in the embodiment of the present invention may be an external computer or a PLC circuit board, and only needs to complete data processing and data transmission functions.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (8)
1. A gas turbine inlet control system, comprising:
the gas inlet of a gas compressor of the gas turbine is provided with a guide vane for controlling the gas inlet flow of the gas turbine; a feed port is arranged in a combustion chamber of the gas turbine, a nozzle is arranged on the feed port and used for injecting fuel into the combustion chamber, and an adjusting valve is arranged on the nozzle and used for controlling the flow of the fuel injected into the combustion chamber;
an ultrasonic detection device which is arranged outside a combustion chamber of the gas turbine and is used for detecting the carbon deposit thickness of the inner wall of the combustion chamber;
the central control unit is electrically connected with the regulating valve and the guide vane, is used for processing data, controls the guide vane and the regulating valve of the gas compressor in the gas turbine, controls the ultrasonic detection device to detect the thickness of the deposited carbon on the inner wall of the combustion chamber in real time, and acquires real-time detection data of the thickness of the deposited carbon; adjusting the opening and closing degree of the regulating valve and the opening and closing angle of the guide vane according to the carbon deposition thickness real-time detection data,
the central control unit firstly determines the initial guide vane opening and closing angle and the adjusting valve opening and closing degree, a first detection interval T1 is preset in the central control unit, the central control unit controls the ultrasonic detection device to detect the carbon deposition thickness of the inner wall of the combustion chamber again after T1 time, the inner wall of the combustion chamber is divided into a main combustion area and a blending area, the guide vane opening and closing angle and the adjusting valve opening and closing degree are readjusted according to the carbon deposition thickness and the carbon deposition rate of different areas in the inner wall of the combustion chamber, and the process comprises the following steps:
step S1, firstly, adjusting the opening and closing angle of the guide vane and the opening and closing degree of an adjusting valve according to the change condition of the carbon deposit thickness in the main combustion area, and selecting guide vane adjusting parameters and adjusting valve adjusting parameters according to the carbon deposit rate of the main combustion area;
s2, after the guide vane adjusting parameters and the adjusting valve adjusting parameters are selected, the opening and closing angle of the guide vane and the opening and closing degree of the adjusting valve are adjusted according to the carbon deposit thickness change condition in the blending area, and the final opening and closing angle of the guide vane and the final opening and closing degree of the adjusting valve are determined by further correcting the selected guide vane adjusting parameters and the selected adjusting valve adjusting parameters in S1;
step S3, presetting a second detection interval T2 in the central control unit, controlling the ultrasonic detection device to detect the carbon deposit thickness in the combustion chamber again after T2 time, detecting the carbon deposit thickness on the inner wall of the combustion chamber, determining the carbon deposit thickness, judging whether the adjustment meets the expected standard, and repeating S1, S2 and S3 if the adjustment does not meet the expected standard until the adjustment meets the expected standard;
a cycle detection period T3 is arranged in the central control unit, and when the adjustment is judged to meet the expected standard in S3, S1, S2 and S3 are repeated after the cycle detection period T3.
2. The gas turbine inlet control system of claim 1, wherein a compressor vane control matrix Y (Y1, Y2, Y3, Y4) is disposed within the central control unit wherein: y1 represents a first opening and closing angle of a guide vane, Y2 represents a second opening and closing angle of the guide vane, Y3 represents a third opening and closing angle of the guide vane, Y4 represents a fourth opening and closing angle of the guide vane, Y4> Y3> Y2> Y1, a regulating valve control matrix T (T1, T2, T3 and T4) is further arranged in the central control unit, wherein the T1 represents the first opening and closing degree, T2 represents the second opening and closing degree, T3 represents the third opening and closing degree, T4 represents the fourth opening and closing degree, T4> T3> T2> T1, and in the step S2, the central control unit controls the ultrasonic detection device to detect the real-time carbon deposit thickness in each position of the inner wall of the combustion chamber in real time, the real-time average thickness Si is obtained after the real-time thickness in each position of the inner wall is summed, and the initial opening and closing angle and regulating valve opening and closing degree are determined according to the average thickness Si.
3. The gas turbine inlet control system of claim 2, wherein when the central control unit determines the initial opening and closing angle of the guide vanes and the opening and closing degree of the regulating valve according to the average thickness Si, the process comprises: thickness contrast parameters S1, S2, S3 and S4 are preset in the central control unit,
initially, the central control unit controls the guide vanes of the air compressor air inlet to open and close at a guide vane second opening and closing angle Y2, and controls the opening and closing degree of the regulating valve to be a second opening and closing degree T2;
when Si is less than or equal to S1, the central control unit controls guide vanes of the air inlet of the air compressor to maintain the original opening and closing angle and controls the regulating valve to maintain the original opening and closing degree;
when S1< Si is not more than S2, the central control unit controls guide vanes in an air inlet of the compressor to open and close at a guide vane third opening angle Y3, and controls the regulating valve to be a third opening degree T3;
and when S2< Si is not more than S3, the central control unit controls the guide vanes of the air inlet in the compressor to open and close at a fourth opening angle of the guide vanes, and controls the regulating valve to be a fourth opening degree T4.
4. The gas turbine air intake control system of claim 1, wherein the central control unit controls the ultrasonic detection device to detect the real-time thickness of the inner wall of the combustion chamber again after a preset T1 interval, and at this time, the combustion chamber is divided into two regions, which include: the fuel coking device comprises a main combustion area and a blending area, wherein the main combustion area is positioned at the head part of a combustion chamber, the blending area is positioned in the middle part of the combustion chamber, an air inlet bypass pipeline and a corresponding bypass control valve are arranged in the blending area, an ultrasonic detection device acquires the fuel coking thickness in the two areas, and a combustion chamber coking thickness matrix ST1 (ST 11, ST 12) at the time of T1 is generated, wherein: ST11 represents the actual soot thickness of the main combustion zone at the time T1, ST12 represents the actual soot thickness of the blending zone at the time T1; and adjusting the opening and closing angle of the guide vane, the adjusting valve and the bypass control valve according to data in the combustion chamber carbon deposit thickness matrix ST1 (ST 11, ST 12), and determining the opening and closing angle of the guide vane and the opening degree of the adjusting valve.
5. The gas turbine inlet control system of claim 4, wherein an initial moment combustor char thickness matrix ST0 (ST 01, ST 02) is disposed within the central control unit, wherein: ST01 represents the initial detection thickness of the main burning zone, ST02 represents the initial detection thickness of the mixing zone; the central control unit obtains the main combustion area carbon deposit thickness difference value C1 and the blending area carbon deposit thickness difference value C2 by comparing data in the combustion chamber carbon deposit thickness matrix ST1 (ST 11, ST 12) at the time T1 and the combustion chamber carbon deposit thickness matrix ST0 (ST 01, ST 02) at the initial time, calculates the carbon deposit speed V01, V02, V03, V0i = C0i/T1, i =1,2,3 of the corresponding area, and determines the opening and closing angle of the guide vane and the opening and closing degree of the regulating valve according to the carbon deposit thickness difference value and the carbon deposit speed, and comprises the following steps of:
when the operation of the step S1 is performed, if the main combustion zone carbon deposit difference value C1 is smaller than a preset comparison parameter C01, the guide vane maintains an original opening and closing angle, the adjusting valve maintains an original opening and closing degree, if the main combustion zone carbon deposit difference value C1 is greater than a preset comparison parameter C01, the opening and closing angle of the guide vane is increased while the opening and closing degree of the adjusting valve is adjusted, and a guide vane adjusting parameter and an adjusting valve adjusting parameter are selected according to the carbon deposit rate of the main combustion zone;
when the operation of the step S2 is performed, if the carbon deposit difference value C2 in the blending region is smaller than the preset contrast parameter C02, the guide vane adjusting parameter and the adjusting valve adjusting parameter are not corrected, the opening degree of the adjusting valve maintains the original opening degree, and if the carbon deposit difference value C2 in the blending region is greater than the preset contrast parameter C02, the step S1 is further corrected by the selected guide vane adjusting parameter and the adjusting valve adjusting parameter.
6. The gas turbine inlet control system of claim 5, wherein a guide vane opening and closing angle parameter selection matrix Y1(Y11, Y12, Y13, Y14) is arranged in the central control unit, wherein Y11 represents a first guide vane adjustment parameter, Y12 represents a second guide vane adjustment parameter, Y13 represents a third guide vane adjustment parameter, Y14 represents a fourth guide vane adjustment parameter, Y11< Y12< Y13< Y14; a regulator valve adjustment parameter adjustment matrix T1(T11, T12, T13, T14) is also provided, wherein: t11 denotes control valve first manipulated variable, T12 denotes control valve second manipulated variable, T13 denotes control valve third manipulated variable, T4 denotes control valve fourth manipulated variable, T11< T12< T13< T14; carbon deposit rate comparison parameters V01, V02 and V03 are also arranged, and when the central control unit determines the guide vane adjusting parameters and the adjusting valve adjusting parameters:
if the carbon deposition rate V1 in the main combustion zone is not more than V01, the central control unit selects a guide vane first adjusting parameter Y11 as a guide vane adjusting parameter, and selects an adjusting valve first adjusting parameter T11 as an adjusting valve adjusting parameter;
if the carbon deposition rate V01 in the main combustion zone is not more than V1 and less than V02, the central control unit selects a guide vane second adjusting parameter Y12 as a guide vane adjusting parameter, and selects an adjusting valve second adjusting parameter T12 as an adjusting valve adjusting parameter;
if the carbon deposition rate VO2 in the main combustion zone is not more than V1 and less than V03, the central control unit selects a third guide vane adjusting parameter Y13 as a guide vane adjusting parameter, and selects a third adjusting parameter T13 of an adjusting valve as an adjusting valve adjusting parameter; if the carbon deposition rate V03 in the main combustion zone is not more than V1, the central control unit selects a guide vane fourth adjusting parameter Y14 as a guide vane adjusting parameter, and selects an adjusting valve fourth adjusting parameter T14 as an adjusting valve adjusting parameter;
a guide vane correction coefficient Y2(Y21, Y22, Y23, Y24) is further arranged in the central control unit, wherein Y21 represents a first guide vane correction parameter, Y22 represents a second guide vane correction parameter, Y23 represents a third guide vane correction parameter, Y24 represents a fourth guide vane correction parameter, Y21< Y22< Y23< Y24; a regulator valve adjustment parameter adjustment matrix T2(T21, T22, T23, T24) is also provided, wherein: t21 represents the regulator valve first correction parameter, T22 represents the regulator valve second correction parameter, T23 represents the regulator valve third correction parameter, T24 represents the regulator valve fourth correction parameter, T21< T22< T23< T24; after the guide vane adjusting parameter and the adjusting valve adjusting parameter are selected, the guide vane adjusting parameter and the adjusting valve adjusting parameter are corrected according to the carbon deposit rate V2 in the mixing area, and the method comprises the following steps:
if the carbon deposition rate V1 in the main combustion zone is not more than V01, the central control unit selects a guide vane first correction parameter Y21 as a guide vane correction number and selects an adjusting valve first adjusting parameter T21 as an adjusting valve correction parameter;
if the carbon deposition rate V01 in the main combustion zone is not more than V1 and less than V02, the central control unit selects a guide vane second correction parameter Y22 as a guide vane correction parameter, and selects an adjusting valve second adjusting parameter T22 as an adjusting valve correction parameter;
if the carbon deposition rate VO2 in the main combustion zone is not more than V1 and less than V03, the central control unit selects a guide vane third correction parameter Y23 as a guide vane correction parameter, and selects an adjusting valve third adjusting parameter T23 as an adjusting valve correction parameter;
and if the carbon deposition rate V03 in the main combustion zone is not more than V1, the central control unit selects the guide vane fourth correction parameter Y24 as the guide vane correction parameter and selects the regulating valve fourth regulating parameter T24 as the regulating valve correction parameter.
7. The gas turbine intake control system according to claim 6, wherein the central control unit calculates a final guide vane adjustment parameter G1, G1= Yi + Y1i + Y2i, a final regulator valve adjustment parameter G2, G2= Ti + T1i-T2i after selecting the guide vane adjustment parameter, the guide vane correction parameter, the regulator valve adjustment parameter, and the regulator valve correction parameter, wherein i =1,2,3,4, Yi represents an initial guide vane opening and closing angle, Ti represents an initial regulator valve opening and closing degree, Y1i represents an guide vane ith adjustment parameter, Y2i represents an ith guide vane correction parameter, T1i represents a regulator valve ith adjustment parameter, T2i represents a regulator valve ith correction coefficient, and finally adjusts the opening and closing angle of the guide vane to G1 and the regulator valve opening and closing degree to G2.
8. The gas turbine intake control system of claim 1, wherein the central control unit is provided with comparison parameters v1, v2, S3, calculates the carbon deposit thickness at the time T2 in the main combustion zone and the blending zone according to the detection data of the ultrasonic detection device and calculates the difference between the carbon deposit thickness at the time T2 and the carbon deposit thickness at the time T1, c1 and c2, wherein c1 represents the carbon deposit thickness difference in the main combustion zone, c2 represents the carbon deposit thickness difference in the blending zone,
if c1< v1 and c2< v2, the carbon deposit thickness is judged to meet the expected standard, otherwise the carbon deposit thickness is judged not to meet the expected standard.
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| US20090053036A1 (en) * | 2007-08-24 | 2009-02-26 | General Electric Company | Systems and Methods for Extending Gas Turbine Emissions Compliance |
| JP4959524B2 (en) * | 2007-11-29 | 2012-06-27 | 三菱重工業株式会社 | Burning burner |
| FR2925146B1 (en) * | 2007-12-14 | 2009-12-25 | Snecma | SYSTEM FOR INJECTING A MIXTURE OF AIR AND FUEL IN A TURBOMACHINE COMBUSTION CHAMBER |
| DE102008011108A1 (en) * | 2008-02-26 | 2009-08-27 | Mtu Aero Engines Gmbh | Process and cleaning of gas turbine components |
| CN102174338B (en) * | 2010-12-31 | 2013-08-07 | 中国航天科技集团公司第六研究院第十一研究所 | Low-flow, high-mixing ratio and stepless regulation gas-liquid mixing gas generator |
| CH706152A1 (en) * | 2012-02-29 | 2013-08-30 | Alstom Technology Ltd | Gas turbine plant with a waste heat boiler arrangement with exhaust gas recirculation. |
| WO2015122949A2 (en) * | 2013-12-17 | 2015-08-20 | United Technologies Corporation | Adaptive turbomachine cooling system |
| CN103628983B (en) * | 2013-12-17 | 2015-09-30 | 哈尔滨工程大学 | Turbine blade of gas turbine radiation path dust guard |
| FR3034466B1 (en) * | 2015-04-03 | 2018-03-16 | Safran Helicopter Engines | FLOW RESTRICTOR |
| JP6427841B2 (en) * | 2015-08-25 | 2018-11-28 | 三菱日立パワーシステムズ株式会社 | Fuel control device, combustor, gas turbine, control method and program |
| US20170298830A1 (en) * | 2016-04-18 | 2017-10-19 | General Electric Company | Oil-free gas turbine engine |
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