CN208752490U - A kind of fuel gas electric heater device adjusting control with feedforward and feedback - Google Patents
A kind of fuel gas electric heater device adjusting control with feedforward and feedback Download PDFInfo
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- CN208752490U CN208752490U CN201821571836.7U CN201821571836U CN208752490U CN 208752490 U CN208752490 U CN 208752490U CN 201821571836 U CN201821571836 U CN 201821571836U CN 208752490 U CN208752490 U CN 208752490U
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- fuel gas
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Abstract
The utility model provides a kind of fuel gas electric heater device that control is adjusted with feedforward and feedback, wherein, flowmeter and the first thermometer are arranged in gas input, the input terminal of the output end and feedforward controller of flowmeter and the first thermometer connects, the output end of second temperature meter and the input terminal of feedback controller connect, feedforward controller output end connect to form feedforward controller with feedback controller output end, the output end of feedforward controller is connect with third adjuster input terminal, the input terminal connection of third conditioner outlet end and electric heater.The temperature and flow of fuel gas entrance are detected by thermometer and flowmeter; fuel gas outlet temperature is detected by second temperature meter; form feedforward and feedback control; improve the control precision of fuel gas outlet temperature; the response time of optimal control effect solves gas turbine inlet electric heater temperature adjustment lag, leads to combustion engine fluctuation of service; frequent shutdown and the problem of damage gas turbine group, it is ensured that gas turbine stable operation.
Description
Technical field
The utility model relates to fuel gas processing technology field more particularly to a kind of combustions that control is adjusted with feedforward and feedback
Expect pneumoelectric heater assembly.
Background technique
In order to guarantee turbine power plant stable operation, fuel gas is required heat to higher than at least 20~30 degree of dew-point temperature
And it keeps stablizing under different flow, therefore electric heater is widely used in conventional gas turbines power station.But conventional electric heating
The temperature control scheme of device only does simple single loop to outlet temperature and adjusts, and the lag of heating effect, fluctuation are big, it cannot be guaranteed that
The Quick temperature adjustment in the case where turbine opens machine, shutdown, prominent removal of load and sudden increase in load, affects combustion gas to a certain extent
The stable operation of turbine, or even damage unit.
Utility model content
Technical problem to be solved in the utility model is in view of the deficiencies of the prior art, to provide a kind of band feedforward and feedback tune
Save the fuel gas electric heater device of control.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of fuel adjusting control with feedforward and feedback
Pneumoelectric heater assembly comprising: electric heater, flowmeter, the first thermometer, second temperature for being heated for fuel gas
Meter, feedforward controller, feedback controller and the third adjuster for heating element described in start and stop, the flowmeter and described
The setting of first thermometer is in gas input, the output end and the feedforward controller of the flowmeter and first thermometer
Input terminal connection, second temperature meter setting is in gas output end, the output end of the second temperature meter and the feedback
The input terminal of controller connects, the output end and the third tune of the output end of the feedforward controller and the feedback controller
Save the input terminal connection of device.
The beneficial effects of the utility model are: detecting electric heater gas input by flowmeter and the first thermometer
Flow and temperature detect the temperature of electric heater gas output end, the stream of electric heater gas input by second temperature meter
Amount and temperature are disturbance variable, and the temperature of electric heater gas output end is as controlled device.When disturbing generation, pass through feedforward
Preact is controlled, influence of the disturbance to controlled device is offset, fuel gas outlet temperature is controlled to adjust by feedback control, is improved
The temperature control precision of fuel gas efficiently solves gas turbine electric heater temperature adjustment lag, leads to combustion engine fluctuation of service, frequency
Numerous shutdown and the problem of damage gas turbine group, it is ensured that gas turbine stable operation, improve heating device reliability and
Accuracy.
Based on the above technical solution, the utility model can also do following improvement.
Further, be provided in the electric heater multiple heating circuits and multiple heating elements, it is each described plus
A third adjuster and at least one heating element are provided in hot loop；The output end of the third adjuster with it is described
Heating element connection.
Beneficial effect using above-mentioned further scheme is: electric heater heating element is grouped beam splitting in proportion, and grouping is thrown
It cuts, each heating circuit configures a power of controlled silicon adjuster and continuously adjusts for power, and every group of heating tube bundle undertakes equivalence
Power, keep stable regulation more accurate.
Further, the gas output end of the electric heater, first thermometer is arranged in the second temperature meter
And the second temperature meter is fuel gas temperature meter, the third adjuster is power of controlled silicon adjuster.
Beneficial effect using above-mentioned further scheme is: reducing the fuel gas electric heater that control is adjusted with feedforward and feedback
The production cost of device, convenient for adjusting the installation and maintenance of the fuel gas electric heater device controlled with feedforward and feedback.
Further, the flow is calculated as ultrasonic flowmeter.
Beneficial effect using above-mentioned further scheme is: in the ultrasonic flow that the fuel gas entrance of electric heater is arranged
Meter, for monitoring fuel gas changes in flow rate, when gas turbine declines too fast because flow occurs in prominent removal of load, feedback control loop
It cannot timely respond to, signal will be issued from feedforward controller, control the output of power of controlled silicon adjuster in time, offset flow and become
Change the influence to electric heater fuel gas outlet temperature.
Further, the gas output end of the electric heater is connect with gas turbine, and the gas of the electric heater is defeated
Enter end to connect with fuel air gas source.
Beneficial effect using above-mentioned further scheme is: efficiently solving conventional gas turbines electric heating currently on the market
The technological deficiency of device, it is ensured that the stabilization of gas turbine group, good operation.
Further, the quantity of the heating circuit is 2,4 or 6.
Beneficial effect using above-mentioned further scheme is: electric heater heating element is grouped beam splitting in proportion, and grouping is thrown
It cuts, each heating circuit configures a power of controlled silicon adjuster and continuously adjusts for power, and every group of heating tube bundle undertakes equivalence
Power, keep stable regulation more accurate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the electric heater that the utility model embodiment provides.
Fig. 2 is the circuit theory schematic diagram for the electric heater that the utility model embodiment provides.
Fig. 3 is the feedforward and feedback control logic block diagram for the electric heater that the utility model embodiment provides.
Drawing reference numeral explanation: 1- electric heater；2- flowmeter；The first thermometer of 3-；4- second temperature meter；5- feedforward control
Device；6- feedback controller；7- third adjuster.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
As shown in Figure 1 to Figure 3, Fig. 1 is the structural schematic diagram of electric heater provided by the embodiment of the utility model.Fig. 2 is
The circuit theory schematic diagram of electric heater provided by the embodiment of the utility model.Fig. 3 is electricity provided by the embodiment of the utility model
The feedforward and feedback control logic block diagram of heater.
Dotted line representation signal connection in Fig. 1, solid line with the arrow represent the transmission path of gas；
Solid line with the arrow in Fig. 2 represents the transmission path of detection signal.
It should be noted that the meaning of each letter occurred in specification and Figure of description are as follows: FT: fuel gas enters
Mouth ultrasonic flowmeter, TE-1: fuel gas outlet temperature, TC-1: feedback control module, TC-2: feedforward control module, SCR: can
It controls silicon power governor (Silicon Controlled Rectifier).
The utility model provides a kind of fuel gas electric heater device that control is adjusted with feedforward and feedback comprising: it uses
In the electric heater 1, flowmeter 2, the first thermometer 3, the second temperature meter 4,5 feedback control of feedforward controller that are heated for fuel gas
Device 6 and third adjuster 7 for heating element described in start and stop, the flowmeter 2 and first thermometer 3 are arranged in gas
The output end of body input terminal, the flowmeter 2 and first thermometer 3 is connect with the input terminal of the feedforward controller 5, institute
Second temperature meter 4 is stated to be arranged in gas output end, the input of the output end of the second temperature meter 4 and the feedback controller 6
End connection.
Specifically, flowmeter and the first thermometer are arranged in gas input, the output end of flowmeter and the first thermometer
It is connect with the input terminal of feedforward controller, the output end of second temperature meter and the input terminal of feedback controller connect, feedforward control
Device output end connect to form feedforward and feedback controller with feedback controller output end, the output end and third of feedforward and feedback controller
The input terminal of the connection of adjuster input terminal, third conditioner outlet end and electric heater connects.Pass through the first thermometer and flow
The temperature and flow of meter detection fuel gas entrance, detect fuel gas outlet temperature by second temperature meter, form feedforward and feedback control
System improves the control precision of fuel gas outlet temperature, optimizes the response time of control action, solves gas turbine inlet electricity
Heater temperature adjustment lag, leads to combustion engine fluctuation of service, frequent shutdown and the problem of damage gas turbine group, it is ensured that gas turbine
Stable operation.
Flow rate disturbance refers to that influence of the gas flow to fuel gas outlet temperature, thermal perturbation refer to gas access in Fig. 2
Influence of the temperature to fuel gas outlet temperature.
The gas turbine fuel pneumoelectric heater assembly controlled is adjusted with feedforward and feedback the utility model relates to a kind of, for
Conventional electric heater temperature adjustment lag is big, fluctuation is big, is easy the problems such as over temperature interlock brennschluss gas-turbine, has redesigned a set of control
Scheme.
The control program hardware device include: electric heater, fuel gas inlet flow rate meter, fuel gas inlet temperature meter,
Fuel gas outlet temperature meter, PLC controller.Electric heater heating element is grouped beam splitting in proportion, and grouping switching is each to heat back
Road configures 1 power of controlled silicon adjuster and continuously adjusts for power, keeps stable regulation more accurate；Temperature is adjusted using feedforward
Feedback control loop, electric heater fuel gas outlet temperature constitute feedback regulation control as regulated variable, with feedback controller
Circuit carries out PID adjusting by PLC controller；Electric heater fuel gas inlet flow rate and temperature are and preceding as main disturbance variable
It presents controller and constitutes feed-forward regulation control loop；Feedforward controller and feedback controller act on, and form feedforward and feedback control system,
Effectively overcome fuel gas inlet flow rate and temperature fluctuation, improves the control precision of electric heater fuel gas outlet temperature.
The utility model efficiently solves gas turbine electric heater temperature adjustment lag, leads to combustion engine fluctuation of service, frequently
The problem of shutting down and damaging gas turbine group.Ensure gas turbine stable operation.
A kind of gas turbine fuel pneumoelectric heater assembly adjusting control with feedforward and feedback comprising: electric heater, combustion
Expect gas inlet flow rate meter, fuel gas inlet temperature meter, fuel gas outlet temperature meter, PLC controller.
The electric heater, for fuel gas to be heated to above at least 20~30 degree or so of dew-point temperature, and not
With equilibrium temperature is kept under flow, the fuel gas after heating enters the gas turbine internal-combustion power generation in downstream.Electric heater
Heating element is grouped beam splitting, and grouping switching, i.e. heating tube bundle are divided into multiple heating circuits and (generally fall into 2,4 or 6
It is a), each heating circuit configures 1 power of controlled silicon adjuster and continuously adjusts for power, and every group of heating tube bundle undertakes equivalence
Power.
The PLC controller, fuel gas inlet flow rate, fuel gas inlet temperature, fuel gas outlet temperature, electric heater
Power of controlled silicon adjuster will constitute feedforward and feedback control loop.Fuel gas outlet temperature is as regulated variable, feedforward and feedback control
The power of controlled silicon adjuster of manipulation electric heater is removed in the output of device processed；The power of controlled silicon adjuster reception of electric heater comes from
The input signal of PLC controller, the current value through over commutation adjustment electric heater, and then adjust the power of electric heater.
The flowmeter is selected the ultrasonic flowmeter without crushing, is avoided out positioned at the fuel gas entrance of electric heater
Existing fuel gas decompression generates condensed liquid.
The heating element of the electric heater is grouping beam splitting, and grouping switching often assembles 1 power of controlled silicon adjuster
It is continuously adjusted for power, it can be achieved that power output is from 0-100%.
Its temperature control scheme is feedforward and feedback control, is realized by the PLC controller with PID adjustment module, and feedforward is anti-
Presenting control loop composition includes: electric heater, fuel gas inlet flow rate meter, fuel gas inlet temperature meter, fuel gas outlet temperature
Meter, PLC controller.
Flowmeter is set in the fuel gas entrance of electric heater, monitors changes in flow rate.
The flow is calculated as the ultrasonic flowmeter of no crushing.
In view of the defects existing in the prior art, the utility model has redesigned a kind of gas turbine fuel pneumoelectric heating dress
It sets, optimization temperature adjusts control program.
The beneficial effects of the utility model are: electric heater fuel gas outlet temperature is as regulated variable, with feedback control
Device constitutes feedback regulation control circuit, carries out PID adjusting by PLC controller；Electric heater fuel gas inlet flow rate and temperature are made
For main disturbance variable, feed-forward regulation control loop is constituted with feedforward controller；Feedforward controller and feedback controller act on, shape
At feedforward and feedback control system, the temperature control precision of fuel gas is improved, it is stagnant to efficiently solve gas turbine electric heater temperature adjustment
Afterwards, lead to combustion engine fluctuation of service, frequent shutdown and the problem of damage gas turbine group, it is ensured that gas turbine stable operation mentions
The high reliability and accuracy of heating device.
Based on the above technical solution, the utility model can also do following improvement.
Further, it is provided with multiple heating circuits and multiple heating elements in the electric heater 1, it is each described to add
A third adjuster 7 and at least one heating element are provided in hot loop；The feedforward controller 5 and feedback control
The output end of device 6 is connect with the input terminal of the third adjuster 7, the output end of the third adjuster 7 and the heating unit
Part connection.
Multiple heating circuits mentioned here refer to that the harness in heater is multiple.
Beneficial effect using above-mentioned further scheme is: electric heater heating element is grouped beam splitting in proportion, and grouping is thrown
It cuts, each heating circuit configures a power of controlled silicon adjuster and continuously adjusts for power, and every group of heating tube bundle undertakes equivalence
Power, keep stable regulation more accurate.
Further, the flowmeter 2 is fuel gas flowmeter, first thermometer 3 and the second temperature
Meter 4 is fuel gas temperature meter, and the third adjuster 7 is power of controlled silicon adjuster.
Beneficial effect using above-mentioned further scheme is: reducing the fuel gas electric heater that control is adjusted with feedforward and feedback
The production cost of device, convenient for adjusting the installation and maintenance of the fuel gas electric heater device controlled with feedforward and feedback.
Further, the flowmeter 2 is ultrasonic flowmeter.
Beneficial effect using above-mentioned further scheme is: in the ultrasonic flow that the fuel gas entrance of electric heater is arranged
Meter, for monitoring fuel gas changes in flow rate, when gas turbine declines too fast because flow occurs in prominent removal of load, feedback control loop
It cannot timely respond to, signal will be issued from feedforward controller, control the output of power of controlled silicon adjuster in time, offset flow and become
Change the influence to electric heater fuel gas outlet temperature.
Further, the gas output end of the electric heater 1 is connect with gas turbine, the gas of the electric heater 1
Input terminal is connect with fuel air gas source.
Beneficial effect using above-mentioned further scheme is: efficiently solving conventional gas turbines electric heating currently on the market
The technological deficiency of device, it is ensured that the stabilization of gas turbine group, good operation.
Further, the quantity of the heating circuit is 2,4 or 6.
Beneficial effect using above-mentioned further scheme is: electric heater heating element is grouped beam splitting in proportion, and grouping is thrown
It cuts, each heating circuit configures a power of controlled silicon adjuster and continuously adjusts for power, and every group of heating tube bundle undertakes equivalence
Power, keep stable regulation more accurate.
The heating element of the electric heater of the utility model is grouped beam splitting, that is, is divided into multiple heating circuits and (usually divides
At 2,4 or 6), each heating circuit configures 1 power of controlled silicon adjuster and continuously adjusts for power, every group of heating
Tube bank undertakes equivalent power, such as is divided into 4 groups, and every group of heating tube bundle undertakes 25% power.Grouping switching makes power regulation
It exports more accurate.
The disturbance of electric heater is from two aspects: primary disturbance is the fuel gas temperature fluctuation under regime flow；It is secondary to disturb
It is dynamic, it is fuel gas changes in flow rate caused by gas turbine load variations.
Therefore, it introduces feedforward control to inhibit to interfere the influence to electric heater outlet fuel temperature degree in time, redesign
A set of feedforward and feedback control program.Feedforward and feedback control loop composition includes: PLC controller, fuel gas inlet flow rate, fuel gas
Inlet temperature, fuel gas outlet temperature, electric heater power of controlled silicon adjuster.Fuel gas outlet temperature as regulated variable,
The power of controlled silicon adjuster of manipulation electric heater is removed in the output of feedforward and feedback controller；The power of controlled silicon of electric heater is adjusted
Device receives the input signal from PLC controller, the current value through over commutation adjustment electric heater, and then adjusts electric heater
Power.
Control principle analysis: when the fuel gas flow and temperature of charging change, it is mounted on the stream of fuel gas entrance
Meter and thermometer detect variation, and feedforward controller can be adjusted immediately, just play school when just starting to influence controlled variable
The influence of disturbance variable is preferably minimized by positive interaction.Fuel gas outlet temperature feedback control loop carries out high-precision adjusting simultaneously,
Guarantee that fuel gas outlet temperature is stablized.
By above-mentioned improvement, the technological deficiency of conventional gas turbines electric heater currently on the market is efficiently solved, it is ensured that
The stabilization of gas turbine group, good operation.
The utility model hardware device includes: electric heater, fuel gas inlet flow rate meter, fuel gas inlet temperature meter, combustion
Expect gas outlet temperature meter, PLC controller.
Fuel gas after separating and filtering is heated to above about 20~30 degree of its dew-point temperature by electric heater, then into combustion gas
Turbine combustion.
The heating element of the electric heater is grouped beam splitting, and every group of heating circuit is by 1 power of controlled silicon adjuster
Carry out power regulation.Outlet temperature (TE-1) is used as controlled variable, inlet flow rate (FT) and inlet temperature (TE2) as interference
Variable constitutes feedforward and feedback control loop.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (6)
1. a kind of fuel gas electric heater device for adjusting control with feedforward and feedback characterized by comprising for being fuel gas
The electric heater (1) of heating, flowmeter (2), the first thermometer (3), second temperature meter (4), feedforward controller (5), feedback control
Device (6) processed and third adjuster (7) for start and stop heating element；
The flowmeter (2) and first thermometer (3) are arranged in gas input, the flowmeter (2) and described first
The output end of thermometer (3) is connect with the input terminal of the feedforward controller (5), and the second temperature meter (4) is arranged in gas
The output end of output end, the second temperature meter (4) is connect with the input terminal of the feedback controller (6), the feedforward control
The output end of device (5) and the output end of the feedback controller (6) are connect with the input terminal of the third adjuster (7).
2. a kind of fuel gas electric heater device for adjusting control with feedforward and feedback according to claim 1, feature exist
In being provided with multiple heating circuits and multiple heating elements in the electric heater (1), be arranged on each heating circuit
There are a third adjuster (7) and at least one described heating element；
The output end of the third adjuster (7) is connect with the heating element of the electric heater (1).
3. a kind of fuel gas electric heater device for adjusting control with feedforward and feedback according to claim 1, feature exist
In the gas output end in the electric heater (1), first thermometer (3) and institute is arranged in the second temperature meter (4)
Stating second temperature meter (4) is fuel gas temperature meter, and the third adjuster (7) is power of controlled silicon adjuster.
4. a kind of fuel gas electric heater device for adjusting control with feedforward and feedback according to claim 3, feature exist
In the flowmeter (2) is ultrasonic flowmeter.
5. a kind of fuel gas electric heater device for adjusting control with feedforward and feedback according to claim 1, feature exist
In the gas output end of the electric heater (1) is connect with gas turbine, the gas input of the electric heater (1) and combustion
Expect inlet air source connection.
6. a kind of fuel gas electric heater device for adjusting control with feedforward and feedback according to claim 2, feature exist
In the quantity of the heating circuit is 2,4 or 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821571836.7U CN208752490U (en) | 2018-09-26 | 2018-09-26 | A kind of fuel gas electric heater device adjusting control with feedforward and feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821571836.7U CN208752490U (en) | 2018-09-26 | 2018-09-26 | A kind of fuel gas electric heater device adjusting control with feedforward and feedback |
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| Publication Number | Publication Date |
|---|---|
| CN208752490U true CN208752490U (en) | 2019-04-16 |
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ID=66085140
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821571836.7U Active CN208752490U (en) | 2018-09-26 | 2018-09-26 | A kind of fuel gas electric heater device adjusting control with feedforward and feedback |
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| CN (1) | CN208752490U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652845A (en) * | 2019-09-12 | 2020-01-07 | 常熟浦发第二热电能源有限公司 | Feedforward control method for flue gas deacidification reaction tower of garbage incinerator |
-
2018
- 2018-09-26 CN CN201821571836.7U patent/CN208752490U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652845A (en) * | 2019-09-12 | 2020-01-07 | 常熟浦发第二热电能源有限公司 | Feedforward control method for flue gas deacidification reaction tower of garbage incinerator |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210326 Address after: 100120 No.6 liupukang street, Xicheng District, Beijing Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: BEIJING DWELL PETROLEUM & GAS TECHNOLOGY DEVELOPMENT Co.,Ltd. Patentee after: China National Petroleum Corporation Engineering Design Co.,Ltd. Address before: 100085 room 301-303, 3 / F, block B, No.22, Shangdi Information Road, Haidian District, Beijing Patentee before: BEIJING DESIGN BRANCH OF CHINA PETROLEUM ENGINEERING CONSTRUCTION Co.,Ltd. |
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| TR01 | Transfer of patent right |