CN103439890A - Simulation system and method based on one-machine virtual DPU - Google Patents
Simulation system and method based on one-machine virtual DPU Download PDFInfo
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- CN103439890A CN103439890A CN2013103608669A CN201310360866A CN103439890A CN 103439890 A CN103439890 A CN 103439890A CN 2013103608669 A CN2013103608669 A CN 2013103608669A CN 201310360866 A CN201310360866 A CN 201310360866A CN 103439890 A CN103439890 A CN 103439890A
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Abstract
The invention discloses a simulation system and method based on a one-machine virtual DPU. The method comprises the steps of selecting a system model needing simulating; establishing a control object model used by a system model by utilizing a DCS routine control function module and establishing the system model by utilizing the control object model; operating the system model. The system and method can simulate the normal operation working condition of a unit on a single computer, can simulate the whole process from ignition of a boiler to turbine rushing, grid connection till full load, can complete various tests on a device or a system according to procedures, and further can simulate malfunctions.
Description
Technical field
The present invention relates to the emulation field, particularly, relate to a kind of analogue system and method based on the virtual DPU of unit.
Background technology
Simulation of Thermal Power is for the operation that guarantees thermal power plant and thermal power plant is carried out to upgrading all have important effect.Existing Simulation of Thermal Power is based on the analogue system of small-sized or medium-size computer, needs many computing machines or the webserver to build analogue system, and the ground area is large, high to hardware requirement.Along with developing rapidly of thermal power plant's control system technology, for example from conventional instrument, control to scattered control system (DCS) and control and change, make the tradition training shorten rapidly by the life cycle of replicating machine, and do not have great change as the tradition training with construction cycle and the function adaptability on the existence basis of replicating machine.In order to adapt to this transformation, can be upgraded to the operation interface of DCS by conventional instrument by operation interface, but this also needs to spend the cost of great number, just and at least need the time of half a year to complete.
Summary of the invention
The purpose of this invention is to provide a kind of analogue system and method based on the virtual DPU of unit, for realizing the Simulation of Thermal Power on single computer.
To achieve these goals, the invention provides a kind of emulation mode based on the virtual DPU of unit, the method comprises: the system model of selecting to need emulation; Utilize the conventional functional module of controlling of DCS to build the control object model that system model is used on single computer, and utilize the described system model of described control object model construction; Move described system model.
Preferably, described system model comprises analog control system model and/or on/off control system model.
Preferably, the control object model that described analog control system model is used comprise standard have self-equilibrating object model, band to lag behind have self-equilibrating object model, standard without the self-balancing ability model and simplify without the self-balancing ability object model.
Preferably, described on/off control system model by DCS conventional control rest-set flip-flop in functional module, with door or door, not gate and time delay module at least the two is built, described analog control system model by the totalizer in described DCS conventional func module, multiplier, divider, PID regulator, function module, leading-hysteresis block at least the two is built.
The invention provides a kind of analogue system based on the virtual DPU of unit, this system comprises: system model is selected module, for selecting to need the system model of emulation; System model builds module, builds for utilizing the conventional functional module of controlling of DCS the control object model that system model is used on single computer, and utilizes the described system model of described control object model construction; System model operation module, for moving described system model.
Preferably, described system model comprises analog control system model and/or on/off control system model.
Preferably, the control object model that described analog control system model is used comprise standard have self-equilibrating object model, band to lag behind have self-equilibrating object model, standard without the self-balancing ability model and simplify without the self-balancing ability object model.
Preferably, described on/off control system model by DCS conventional control rest-set flip-flop in functional module, with door or door, not gate and time delay module at least the two is built, described analog control system model by the totalizer in described DCS conventional func module, multiplier, divider, PID regulator, function module, leading-hysteresis block at least the two is built.
The present invention can be on single computer emulation unit accidental conditions, can simulate from raise steam to the steam turbine red switch, grid-connected until band fully loaded overall process, can complete the various tests of equipment or system being carried out according to rules, and can carry out emulation to fault.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
The accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms the part of instructions, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the emulation mode process flow diagram based on the virtual DPU of unit provided by the invention;
Fig. 2 be standard provided by the invention self-equilibrating object model schematic diagram arranged;
Fig. 3 is on/off control system model schematic diagram provided by the invention;
Fig. 4 is boiler system model schematic diagram provided by the invention;
Fig. 5 is the analogue system schematic diagram based on the virtual DPU of unit provided by the invention.
Description of reference numerals
201 controller output signal 203 multipliers
205 leading-hysteresis block 207 simulated point output signals
301 open command signal 303 closes command signal
305 rest-set flip-flop 307 first time delay modules
Feedback signal is opened in 309 second time delay module 311 emulation
503 system models build module 505 system model operation modules
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In order to realize realizing the emulation of thermal power plant on single computer, the invention provides the emulation mode based on the virtual dispersion treatment of unit unit (DPU), as shown in Figure 1, comprising: the system model (step 101) of selecting to need emulation; Utilize the conventional functional module of controlling of DCS to build the control object model that system model is used on single computer, and utilize the described described system model of control object model construction (step 103); Move described system model (step 105).In general, system model comprises analog control system model and/or on/off control system model.The control object model can be used for building large-scale analog control system model and/or on/off control system model.The control object model that the analog control system model is used comprise standard have self-equilibrating object model, band to lag behind have self-equilibrating object model, standard without the self-balancing ability model and simplify without the self-balancing ability object model.The self-equilibrating object model that has of standard is: Ga(S)=K/(1+Ts)
n, the self-equilibrating object model that has that band lags behind is: Gb(S)=Ke-τ S/(1+Ts)
n, standard without the self-balancing ability object model, be: GC(S)=ε/s(1+TS)
n, simplification without the self-balancing ability object: Gd(S)=e-τ S/Ts.In publicity: ε is the time constant of ascending to heaven without the self-equilibrating object; T is inertia time constant; τ is the delay time constant; N is for there being self-equilibrating object order.For the on/off control system model, can build by some simple control object models, for example trigger and time delay module.
What Fig. 2 showed standard has a self-equilibrating object model, its adopted controller output signal 201, multiplier 203, leading-hysteresis block 205 and, controller output signal 201 input multipliers 203, the result of multiplier 203 is Output simulation point output signal 207 after leading-hysteresis block 205.Fig. 3 shows on/off control system model schematic diagram, wherein open command signal 301, close command signal 303 and input respectively the input end of rest-set flip-flop 305 as input signal, the output terminal of two complementations of rest-set flip-flop 305 is connected with the second time delay module 309 with the first time delay module 307 respectively, the first time delay module 307 Output simulations are opened feedback signal 311, the second time delay module 309 Output simulations and are closed feedback signal 313.
For boiler is carried out to emulation, can select system model as shown in Figure 4, its five main process passage: confluent W → steam water-level H; Fuel quantity B → vapour pressure P; Desuperheating water Wj → superheat steam temperature T; Air inducing amount Vl → combustion chamber draft Pl; Coal-air ratio V/B → flue oxygen level O2%.Because the load D change of boiler is frequent and very large randomness is arranged, but generally can record load variation, so can consider feedforward control scheme.Therefore three the load D disturbance passages of having gone back special design, respectively: load D → water level H; Load D → vapour pressure P; Load D → steam temperature T.Also have in addition some to disturb mutually passage: for the superheated vapor steam temperature, to consider air output V and the fuel quantity B impact on it, i.e. B → T and V → T; Also considered that for combustion chamber draft Pl air-supply V is V → Pl on its impact; Considered that for vapour pressure P the impact that feedwater W changes it is W → P.Following table has provided the expression formula of each control object model.
In table: K is enlargement factor; ε is the time constant of ascending to heaven without the self-equilibrating object; T is inertia time constant; τ is the delay time constant.
The control object model can be built by the conventional functional module of controlling of DCS, and the conventional functional module of controlling of DCS can comprise: rest-set flip-flop, with door or door, not gate, time delay module, totalizer, multiplier, divider, PID regulator, function module and in advance-hysteresis block.
Correspondingly, the invention provides a kind of analogue system based on the virtual DPU of unit, this system comprises: system model is selected module 501, for selecting to need the system model of emulation; System model builds module 503, builds for utilizing the conventional functional module of controlling of DCS the control object model that system model is used on single computer, and utilizes the described system model of described control object model construction; System model operation module 505, for moving described system model.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (8)
1. the emulation mode based on the virtual DPU of unit, is characterized in that, the method comprises:
Selection needs the system model of emulation;
Utilize the conventional functional module of controlling of DCS to build the control object model that system model is used on single computer, and utilize the described system model of described control object model construction;
Move described system model.
2. method according to claim 1, is characterized in that, described system model comprises analog control system model and/or on/off control system model.
3. method according to claim 2, it is characterized in that, the control object model that described analog control system model is used comprise standard have self-equilibrating object model, band to lag behind have self-equilibrating object model, standard without the self-balancing ability model and simplify without the self-balancing ability object model.
4. method according to claim 2, it is characterized in that, described on/off control system model by DCS conventional control rest-set flip-flop in functional module, with door or door, not gate and time delay module at least the two is built, described analog control system model by the totalizer in described DCS conventional func module, multiplier, divider, PID regulator, function module, leading-hysteresis block at least the two is built.
5. the analogue system based on the virtual DPU of unit, is characterized in that, this system comprises:
System model is selected module, for selecting to need the system model of emulation;
System model builds module, builds for utilizing the conventional functional module of controlling of DCS the control object model that system model is used on single computer, and utilizes the described system model of described control object model construction;
System model operation module, for moving described system model.
6. system according to claim 5, is characterized in that, described system model comprises analog control system model and/or on/off control system model.
7. system according to claim 6, it is characterized in that, the control object model that described analog control system model is used comprise standard have self-equilibrating object model, band to lag behind have self-equilibrating object model, standard without the self-balancing ability model and simplify without the self-balancing ability object model.
8. system according to claim 6, it is characterized in that, described on/off control system model by DCS conventional control rest-set flip-flop in functional module, with door or door, not gate and time delay module at least the two is built, described analog control system model by the totalizer in described DCS conventional func module, multiplier, divider, PID regulator, function module, leading-hysteresis block at least the two is built.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105373013A (en) * | 2015-12-07 | 2016-03-02 | 上海明华电力技术工程有限公司 | Thermal power set DCS analog quantity control circuit simulation test system and method |
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Cited By (2)
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| CN105373013A (en) * | 2015-12-07 | 2016-03-02 | 上海明华电力技术工程有限公司 | Thermal power set DCS analog quantity control circuit simulation test system and method |
| CN105373013B (en) * | 2015-12-07 | 2018-07-03 | 上海明华电力技术工程有限公司 | Fired power generating unit DCS system Analog control loop simulation tests system and method |
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