CN204302776U - A kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device - Google Patents
A kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device Download PDFInfo
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- CN204302776U CN204302776U CN201420706427.9U CN201420706427U CN204302776U CN 204302776 U CN204302776 U CN 204302776U CN 201420706427 U CN201420706427 U CN 201420706427U CN 204302776 U CN204302776 U CN 204302776U
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Abstract
The utility model provides a kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device, relate to power plant's control technology field, this device comprises feedforward controller, tuning controller, internal model predictive control device, adder, control object, phase compensating network and state variable control and compensation device.Such scheme can regulate water injection valve aperture in advance by adopting the internal model predictive control device with large time delay control strategy, and adopt the tuning controller with process of inhibition interference, adopt phase compensating network to carry out to superheated steam temperature model order the responsiveness that water injection valve aperture is accelerated in depression of order process simultaneously, effectively can suppress the change of overheating steam temperature, reduce the amplitude of variations in temperature, thus improve the load-response-speed of unit, stability and Ability of Resisting Disturbance.
Description
Technical field
The utility model relates to power plant's control technology field, refers to a kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device especially.
Background technology
Automatic generation amount controls (Automatic Generation Control, AGC) as modern thermal power generation unit discrete control system (Distributed Control System, DCS) core control portions in, carry and coordinate boiler, each closed-loop control system of steam turbine side with the vital task of response scheduling load instruction, be connect the bridge between electrical network and unit, its control performance directly affects fail safe that unit AGC runs, stability, economy and electric network active adjustment level.
At present, Subcritical Units is in running, along with unit working conditions change, the dynamic characteristic of unit allocation object becomes relatively poor, delayed and the inertia of process also becomes large thereupon, the feature of the non-linear and time variation of system is more and more significant, causes that the load-response-speed of unit is low, poor stability and can not the change of adaptation condition very well.
Super-heated steam temperature control is an important indicator of unit operation quality, and overheating steam temperature is too high, and the high-pressure section of superheater, jet chimney and steam turbine may be caused to damage; Overheating steam temperature is too low, and power plant's hear rate can be caused to rise, and makes steam turbine axial thrust increase and cause thrust bearing to transship; In a word, overheating steam temperature must be kept to be stabilized near a desired value.At present, the basic skills of super-heated steam temperature control is exactly the Fuel-Water Rate of control system, and because coal and unit operating mode are often among change, actual Fuel-Water Rate and design load have very big difference, cause overheating steam temperature fluctuating range large.In the case, conventional employing load instruction feedforward+proportion integration differentiation (Proportion Integration Differentiation, PID) the AGC control program fed back, has been difficult to coordinate the contradiction between control system rapidity and stability.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device, to solve that load-response-speed existing for prior art is low, poor stability, overheating steam temperature fluctuating range large and can not the problem that changes of adaptation condition very well.
For solving the problems of the technologies described above, the utility model embodiment provides a kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device, comprises feedforward controller, internal model predictive control device, tuning controller, adder, control object, phase compensating network and state variable control and compensation device;
The input of described internal model predictive control device accesses overheating steam temperature set point and is connected with the output of adder, and the described output of internal model predictive control device is connected with the input of tuning controller;
The input of described feedforward controller is connected with DCS, and the output of described feedforward controller is connected with the input of tuning controller, and the output of this tuning controller is connected with the input of control object;
The output of described control object is connected with the first input end of described state variable control and compensation device with the input of described phase compensating network respectively, second input of described state variable control and compensation device receives overheating steam temperature set point, and the output of described state variable control and compensation device is connected with the second input with the first input end of adder respectively with the output of described phase compensating network.
Wherein, described device take specialized hardware as carrier, adopts independently hardware platform with DCS.
Wherein, described device is communicated by opc server with between DCS.
Wherein, described device carries out communication by network adapter and opc server.
Wherein, described network adapter is the one in switch, hub, route.
Wherein, two kinds of Handshake Protocols are adopted between described device and DCS: general communication Handshake Protocol and the communication Handshake Protocol of control loop.
The beneficial effect of technique scheme of the present utility model is as follows:
In such scheme, water injection valve aperture can be regulated in advance by adopting the internal model predictive control device with large time delay control strategy, and adopt the tuning controller with process of inhibition interference, adopt phase compensating network to carry out to superheated steam temperature model order the responsiveness that water injection valve aperture is accelerated in depression of order process simultaneously, effectively can suppress the change of overheating steam temperature, reduce the amplitude of variations in temperature, thus improve the load-response-speed of unit, stability and Ability of Resisting Disturbance.
Accompanying drawing explanation
The structural representation of the fired power generating unit overheating steam temperature Dynamic matrix control optimization device that Fig. 1 provides for the utility model embodiment.
[main element symbol description]
1: phase compensating network;
2: adder;
3: state variable control and compensation device;
4: internal model predictive control device;
5: feedforward controller;
6: tuning controller;
7: control object.
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The utility model is low for existing load-response-speed, poor stability, overheating steam temperature fluctuating range are large and can not the problem that changes of adaptation condition very well, provides a kind of fired power generating unit overheating steam temperature Dynamic matrix control optimization device.
Be illustrated in figure 1 the structural representation of the fired power generating unit overheating steam temperature Dynamic matrix control optimization device that the utility model embodiment provides, this device comprises feedforward controller 5, internal model predictive control device 4, tuning controller 6, adder 2, control object 7, phase compensating network 1 and state variable control and compensation device 3;
The input of described internal model predictive control device 4 accesses overheating steam temperature set point and is connected with the output of adder 2, and the output of described internal model predictive control device 4 is connected with the input of tuning controller 6;
The input of feedforward controller 5 is connected with DCS, and receive unit load instruction, the output of feedforward controller 5 is connected with the input of tuning controller 6, and the output of this tuning controller 6 is connected with the input of control object 7;
The output of control object 7 is connected with the first input end of state variable control and compensation device 3 with the input of phase compensating network 1 respectively, second input of state variable control and compensation device 3 receives overheating steam temperature set point, and the output of state variable control and compensation device 3 is connected with the second input with the first input end of adder 2 respectively with the output of phase compensating network 1.
Wherein, internal model predictive control device 4 receives the superposed signal of overheating steam temperature set point and the output of adder 2 output, the superposed signal that internal model predictive control device 4 is exported by overheating steam temperature set point and adder 2 output compares also output error signal with the output of process internal mold, this error signal is supplied to tuning controller 6 simultaneously, as the feedforward compensation of tuning controller 6, wherein, internal model predictive control device 4 has large time delay control strategy, water injection valve aperture can be regulated in advance, thus the change of the overheating steam temperature of effective inhibitory control object 7, reduce the amplitude of variation of overheating steam temperature.
Further, the input of the unit load instruction access feedforward controller 5 that DCS sends, the input of overheating steam temperature feed-forward signal access tuning controller 6 is exported after feedforward controller 5 processes, the output signal of internal model predictive control device 4 also accesses the input of tuning controller 6 simultaneously, process the overheated temperature control signal of rear output by tuning controller 6 to go to control water injection valve aperture, thus the overheating steam temperature temperature value of regulable control object 7, wherein, tuning controller can disturb by process of inhibition, ensure that Output rusults reaches stable for a long time, thus ensure the stability of whole system.
Further, the overheating steam temperature temperature value that control object 7 exports is supplied to the input of phase compensating network 1 and the first input end of state variable control and compensation device 3 respectively, second input of state variable control and compensation device 3 receives overheating steam temperature set point, the output signal of state variable control and compensation device 3 and the output signal of phase compensating network 1 are supplied to adder 2, adder 2 processes rear output superposed signal and sends into internal model predictive control device 4, thus forms overheating steam temperature close loop control circuit.
Wherein, phase compensating network 1 adopts advanced dynamic compensation technology to come inertia and the hysteresis quality of compensatory control object 7, when the superheated steam temperature model order of control object 7 is higher, advanced dynamic compensation technology is adopted to carry out depression of order process to it, the superheated steam temperature model order of the equivalent control object after depression of order compensates reduces second order than the model order of former control object 7, thus make the equivalent control object after compensation have delayed less characteristic, like this can under the constant prerequisite of whole system stability, accelerate the responsiveness regulating water injection valve aperture, suppress the change of overheating steam temperature.
Simultaneously, the overheating steam temperature of control object 7 is supplied to state variable control and compensation device 3, this state variable control and compensation device 3 exports the overheating steam temperature temperature correction value (namely claiming state variable) of control object 7, then water injection valve aperture is regulated in advance according to this temperature correction value, the inertia of control object 7 can be effectively reduced, under the prerequisite of the system of guarantee same stable, water injection valve aperture in advance, thus improve the load-response-speed of unit.
Further, this device take specialized hardware as carrier, independent of DCS, with between DCS by be connected for the object of process control with embed (Object Linking and Embedding for Process Control, OPC) server communicates, and described device is communicated with opc server by network adapter, described network adapter is the one in switch, hub, route.
Further, reliable in order to ensure the communication security of this device and DCS, adopt two kinds of Handshake Protocols:
One is general communication Handshake Protocol, the communication between checking DCS and this device;
Two is communication Handshake Protocols of control loop, the communication of a certain specific control loop between checking DCS and this device.
This device receives the unit load command signal that DCS sends, export optimal control instruction after treatment and carry out the current DCS control command of real time correction to DCS, whole system is made to be in adaptive on-line optimization state all the time, to reach the object improving unit cooperative and AGC control performance, thus improve closed loop stability and the Ability of Resisting Disturbance of unit AGC, its control performance is constantly approached to optimal objective.
In such scheme, water injection valve aperture can be regulated in advance by adopting the internal model predictive control device with large time delay control strategy, and adopt the tuning controller with process of inhibition interference, adopt phase compensating network to carry out to superheated steam temperature model order the responsiveness that water injection valve aperture is accelerated in depression of order process simultaneously, effectively can suppress the change of overheating steam temperature, reduce the amplitude of variations in temperature, thus improve the load-response-speed of unit, stability and Ability of Resisting Disturbance.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. a fired power generating unit overheating steam temperature Dynamic matrix control optimization device, is characterized in that, comprises feedforward controller, internal model predictive control device, tuning controller, adder, control object, phase compensating network and state variable control and compensation device;
The input of described internal model predictive control device accesses overheating steam temperature set point and is connected with the output of adder, and the described output of internal model predictive control device is connected with the input of tuning controller;
Described feedforward controller input is connected with DCS, and the output of described feedforward controller is connected with the input of tuning controller, and the output of this tuning controller is connected with the input of control object;
The output of described control object is connected with the first input end of described state variable control and compensation device with the input of described phase compensating network respectively, second input of described state variable control and compensation device receives overheating steam temperature set point, and the output of described state variable control and compensation device is connected with the second input with the first input end of adder respectively with the output of described phase compensating network.
2. fired power generating unit overheating steam temperature Dynamic matrix control optimization device according to claim 1, it is characterized in that, described device take specialized hardware as carrier, adopts independently hardware platform with DCS.
3. fired power generating unit overheating steam temperature Dynamic matrix control optimization device according to claim 1, it is characterized in that, described device is communicated by opc server with between DCS.
4. fired power generating unit overheating steam temperature Dynamic matrix control optimization device according to claim 1, it is characterized in that, described device carries out communication by network adapter and opc server.
5. fired power generating unit overheating steam temperature Dynamic matrix control optimization device according to claim 4, it is characterized in that, described network adapter is the one in switch, hub, route.
6. fired power generating unit overheating steam temperature Dynamic matrix control optimization device according to claim 1, is characterized in that, adopts two kinds of Handshake Protocols: general communication Handshake Protocol and the communication Handshake Protocol of control loop between described device and DCS.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104793610A (en) * | 2015-05-08 | 2015-07-22 | 华北电力科学研究院有限责任公司 | Method and device for determining parameters of feed forward controller of coordination system |
| CN105204330A (en) * | 2015-07-10 | 2015-12-30 | 国电科学技术研究院 | Design method for Newtonian mechanics controller in thermal power plant steam temperature system |
| CN105607481A (en) * | 2016-01-25 | 2016-05-25 | 王嫣俐 | Polyethylene reaction process temperature control method |
| CN109116738A (en) * | 2018-09-27 | 2019-01-01 | 杭州电子科技大学 | A kind of Two-Degree-of-Freedom Internal Model Control analysis method of industrial heating furnace |
| CN114063437A (en) * | 2021-10-22 | 2022-02-18 | 北京京能科技有限公司 | Method for controlling flue gas baffle of reheater of supercritical unit |
| CN115407647A (en) * | 2022-10-31 | 2022-11-29 | 艾坦姆流体控制技术(山东)有限公司 | Optimized control method and three-level punching valve control system using same |
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- 2014-11-21 CN CN201420706427.9U patent/CN204302776U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104793610A (en) * | 2015-05-08 | 2015-07-22 | 华北电力科学研究院有限责任公司 | Method and device for determining parameters of feed forward controller of coordination system |
| CN104793610B (en) * | 2015-05-08 | 2017-10-13 | 华北电力科学研究院有限责任公司 | Coordination system feedforward controller determination method for parameter and device |
| CN105204330A (en) * | 2015-07-10 | 2015-12-30 | 国电科学技术研究院 | Design method for Newtonian mechanics controller in thermal power plant steam temperature system |
| CN105204330B (en) * | 2015-07-10 | 2018-01-09 | 国电科学技术研究院 | A kind of design method of the Newtonian mechanics controller in thermal power plant's Steam Temperature System |
| CN105607481A (en) * | 2016-01-25 | 2016-05-25 | 王嫣俐 | Polyethylene reaction process temperature control method |
| CN109116738B (en) * | 2018-09-27 | 2021-04-13 | 杭州电子科技大学 | Two-degree-of-freedom internal model control analysis method of industrial heating furnace |
| CN109116738A (en) * | 2018-09-27 | 2019-01-01 | 杭州电子科技大学 | A kind of Two-Degree-of-Freedom Internal Model Control analysis method of industrial heating furnace |
| CN114063437A (en) * | 2021-10-22 | 2022-02-18 | 北京京能科技有限公司 | Method for controlling flue gas baffle of reheater of supercritical unit |
| CN114063437B (en) * | 2021-10-22 | 2023-08-08 | 北京京能科技有限公司 | Control method for flue gas baffle of reheater of supercritical unit |
| CN115407647A (en) * | 2022-10-31 | 2022-11-29 | 艾坦姆流体控制技术(山东)有限公司 | Optimized control method and three-level punching valve control system using same |
| CN115407647B (en) * | 2022-10-31 | 2023-01-24 | 艾坦姆流体控制技术(山东)有限公司 | Optimized control method and three-level punching valve control system using same |
| CN116352705A (en) * | 2023-02-28 | 2023-06-30 | 南通大学 | Underwater mechanical arm disturbance rejection prediction control method based on data driving |
| CN116352705B (en) * | 2023-02-28 | 2024-01-09 | 南通大学 | Underwater mechanical arm disturbance rejection prediction control method based on data driving |
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