CN206039282U - Coal -fired power unit coordinating control system testing system - Google Patents
Coal -fired power unit coordinating control system testing system Download PDFInfo
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- CN206039282U CN206039282U CN201621065353.0U CN201621065353U CN206039282U CN 206039282 U CN206039282 U CN 206039282U CN 201621065353 U CN201621065353 U CN 201621065353U CN 206039282 U CN206039282 U CN 206039282U
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- control system
- fired power
- generating unit
- power generating
- coordinated control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model relates to a coal -fired power unit coordinating control system testing system, this system include coal -fired power unit coordinating control system, and this system still includes coal -fired power unit coordinating control system test device, coal -fired power unit coordinating control system test device and coal -fired power unit coordinating control system independent setting, coal -fired power unit coordinating control system test device includes the controller, be connected with input, output subassembly on the controller, input group spare and coal -fired power unit coordinating control system's signal output interface connection, output subassembly and coal -fired power unit coordinating control system's signal input interface connection. The utility model discloses a coal -fired power unit coordinating control system testing system sets up coal -fired power unit coordinating control system test device in coal -fired power unit coordinating control system outside, has reduced the dependence to the DCS system, has improved the flexibility that test device used.
Description
Technical field
This utility model belongs to fired power generating unit automatic control technology field, and in particular to a kind of fired power generating unit coordinates control system
System pilot system.
Background technology
The center of load control of the thermal power generation unit turbine-boiler coordinated control system as unit, in new-built unit Commissioning
And in later production, to stablizing unit operation, improving unit automation level, improve the load performance of unit with weight
Act on, in unit Commissioning quality inspection index and unit performance certification test index, the system debug quality has
Prominent proportion.
Turbine-boiler coordinated control system is typically by scattered control system (DCS) as electronic-controlled installation.For various reasons,
In design, fabrication stage, it is difficult to ensure the reasonability and integrity of turbine-boiler coordinated control system, the Secondary Design at scene, configuration
Modification is unavoidable.For the system complex, it is related to the characteristics of subsystem is more, the method for operation is various, live modification is more, adopts
The method of conventional test apparatuses simulated field signal is difficult to meet the requirement of the static system simulation test.
Patent documentation《The method of fired power generating unit dcs control object simulation modeling》Disclose a kind of to DCS
Control function carries out the phantom of dynamic test, specially:Inside DCS system, control object is built with DCS configuration instruments
Simplified phantom so that control loop formed closed loop.But the phantom is a kind of software module, and it is located at DCS
Internal system, very flexible are strong to DCS system dependency.
Utility model content
This utility model provides a kind of fired power generating unit coordinated control system pilot system, to solve existing fired power generating unit
Coordinated control system pilot system very flexible, the problem strong to DCS system dependency.
For solving above-mentioned technical problem, fired power generating unit coordinated control system pilot system of the present utility model includes thermal motor
Group coordinated control system, the system also include fired power generating unit coordinated control system assay device, and the fired power generating unit coordinates control
STS system test set is independently arranged with fired power generating unit coordinated control system;The fired power generating unit coordinated control system assay device bag
Controller is included, input, output precision, the input module and fired power generating unit coordinated control system on the controller, is connected with
Signal output interface connects, and the output precision is connected with the signal input interface of fired power generating unit coordinated control system.
The fired power generating unit coordinated control system assay device includes power module, for powering for controller.
The fired power generating unit coordinated control system is DCS control systems.
The beneficial effects of the utility model:Fired power generating unit coordinated control system pilot system of the present utility model is by thermal motor
Group coordinated control system assay device is arranged at outside fired power generating unit coordinated control system, is reduced to DCS system dependency, is carried
The high motility of assay device application.
A pilot system part of the present utility model carries out signal simulation using assay device, and a part is using reality
DCS control devices carry out actual motion, i.e., the system is carried out by the way of partial simulation and part actually combine, and is both ensured
Comprehensive integrity of test, again there is provided a more real experimental enviroment, and also reduces the complexity of test, its
Effect is hardly matched using test apparatuses simple analog on-site signal.
Description of the drawings
Fig. 1 is fired power generating unit coordinated control system assay device schematic diagram;
Fig. 2 is fired power generating unit coordinated control system pilot system schematic diagram;
Fig. 3 is that fired power generating unit coordinated control system assay device emulates signal flow graph.
Specific embodiment
Below in conjunction with the accompanying drawings, the technical solution of the utility model is further described in detail.
As shown in figure 1, the fired power generating unit coordinated control system assay device in the system includes controller and and controller
The input of connection, output module.The simulation that the analog input, output module are used between assay device and coordinated control system
The AO modules of amount signal transmission, i.e. assay device are used for connecting the AI modules of fired power generating unit coordinated control system;Assay device
AI modules are used for connecting the AO modules of fired power generating unit coordinated control system.Test simulation is preset with the controller of assay device to patrol
Volume, for the signal being input into according to coordinated control system, calculate parameter required when coordinated control system is tested.
Siemens S7 series of PLC is adopted for the hardware unit of assay device, and the device is additionally provided with power module,
The power module is used for powering for the hardware unit.
AO modules and AI modules in assay device is in-out box common in the art, here no longer to which
Concrete structure is described in detail.
Used as other embodiment, the fired power generating unit coordinated control system assay device in the system can also adopt existing
Technology pilot experiment device, such as list of references《The method of fired power generating unit dcs control object simulation modeling》(patent
Number:102446233 A of CN) in control object simplify phantom.
The coordinated control system connection signal related to assay device is coordinated is as follows:
(1) coordinated control system is exported to the signal of assay device and is had:Total fuel quantity, steam turbine valve bit instruction (boiler master
Output).
(2) assay device feeds back to the signal of coordinated control system and has:Main steam pressure, generator power, steam turbine are adjusted
Level level power, drum pressure.
It is when controller receives total fuel quantity and steam turbine valve bit instruction of coordinated control system transmission, pre- inside controller
If test simulation logic will according to above-mentioned signal carry out simulation calculation obtain main steam pressure, generator power, steam turbine adjust
The parameters such as assistant warden level power, drum pressure, and these parameters are fed back to into coordinated control system.Below to default examination in controller
Test emulation logic to be described in detail:
The structure of phantom is as shown in figure 3, main by main vapour pressure of boiler, drum pressure analog loopback and steam turbine first
Pressure, generator power analog loopback composition after level.
Drum pressure, main vapour pressure emulation signal generation process are as follows:
Total fuel flow is delayed after functional device calculates through pure, then calculates through two one order inertia functional modules and generate pots
Stove calory burning signal;
Boiler combustion heat signal is that the steam energy that steam turbine is consumed is believed with the product signal of steam turbine valve position and main vapour pressure
Deviation computing number is carried out, deviation signal is generated;The deviation signal of the generation is integrated computing;
Integral operation output signal is the drum pressure signal of emulation;
Again through first-order lag computing, the signal of generation is that main vapour pressure emulates signal to integral operation output signal.
After steam turbine governing stage, Pressure Simulation signal and generator power emulation signal generation process are as follows:
Steam turbine valve position signal and main vapour pressure emulation signal multiplication, generate the steam energy signal that steam turbine is consumed;
After first-order lag computing, the signal of generation is pressure after steam turbine governing stage to the steam energy signal that steam turbine is consumed
Emulation signal;
After Pressure Simulation signal is respectively through two first-order lag computings after steam turbine governing stage, high, intermediate pressure cylinder is generated respectively
Simulation of SAR power image signal and low pressure (LP) cylinder Simulation of SAR power image signal
High intermediate pressure cylinder Simulation of SAR power image signal and low pressure (LP) cylinder Simulation of SAR power image signal are through additive operation, the signal electromotor of generation
Simulation of SAR power image signal.
Simulation calculation principle is described as follows:
Boiler parameter simulation is represented using energy balance mode, the signal that two first order inertial loops of total fuel quantity Jing are produced
Furnace side calory burning, the pure delay time that vapour pressure is disturbed to fuel is less to be omitted.The steaming that the heat signal is consumed with steam turbine
Vapour energy is compared, and the integrated link of its difference simulates drum pressure change procedure, and integration rate is by same type units characteristic
It is approximate to determine.Drum pressure Jing live steam pipe capacitance-resistances characteristic produces main vapour pressure.The model more can effectively reflect combustion rate
Disturbance electrical power open loop when disturbance, steam turbine timing steam gate, the different response process of main vapour pressure under closed loop operating mode.
Product of the steam turbine throttle flow by main vapour pressure with timing steam gate aperture is calculated, wherein, high pressure cylinder acting with
The ratio of mesolow cylinder acting presses 1:3 calculate, and resuperheat time constant was calculated by 10 seconds, and the less link of time constant is neglected
Slightly.
The calculating process of the above-mentioned phantom for designing is as follows:
(1) burning and diabatic process in stove:
According to the requirement to phantom precision, necessary simplification can be carried out to boiler model,
In stove, burning can be reduced to represent with the pure one order inertia transfer function model delayed with diabatic process.
Δ Q=[1/ (T2S+1)]ΔF (2)
In formula:Δ F hearth combustion intensity;Δ B enters the fuel quantity of burner hearth;Δ Q boiler heating surfaces are total
(being represented with steam flow unit) is recepted the caloric effectively;τ1、T1、T2、k1Constant, can be tried to achieve by calculating or testing.
(2) transitive relation of drum pressure:
The heat storage capacity of boiler and jet chimney is separated, the amount of stored heat of boiler is represented by:
Δ Q- Δ D=Ck(dPk/dt) (3)
In formula:Total effective caloric receptivity of Δ Q boilers;Δ D enters the steam flow of jet chimney;CkPot
The heat storage coefficient of stove, can be determined by test;PkThe steam pressure of steam inlet channel, can be replaced with drum pressure.
Above formula is carried out into necessary derivation, is then had:
In formula:C0Constant.
Above formula is written as into the form of transmission function, is then represented by:
ΔPk=(1/TCS)(ΔQ-ΔD) (5)
In formula:TCThe integration time constant related to boiler thermal capacity.
(3) steam flow and generator power:
From steam turbine principle, for resuperheat unit, steam flow steam turbine power channel transfer function is writeable
For:
WT(s)=KN[(aTss+1)/(Tss+1)][1/(1+Tas)] (6)
In formula:Ratio of the а steam turbine high pressure cylinder power in general power;TsThe time constant of resuperheater;
TaSteam turbine time constant.
As shown in Fig. 2 fired power generating unit coordinated control system pilot system includes fired power generating unit coordinated control system and thermoelectricity
Coordinated Control Systems assay device, in fired power generating unit coordinated control system and fired power generating unit coordinated control system assay device
It is provided with AO/AI modules, AO modules and the fired power generating unit coordinated control system assay device of fired power generating unit coordinated control system
The connection of AI modules, the AI modules of fired power generating unit coordinated control system and the AO moulds of fired power generating unit coordinated control system assay device
Part connects;Fired power generating unit coordinated control system assay device also includes controller, is preset with test simulation and patrols in the controller
Volume, for the signal being input into according to coordinated control system, calculate parameter required when coordinated control system is tested.
The emulation logic of the above-mentioned assay device of above-mentioned default test simulation logical AND is consistent, no longer elaborates here.
Fired power generating unit coordinated control system in the present embodiment adopts distributed monitoring control system, for scattered control system
The concrete structure of DCS is no longer elaborated here referring to DCS of the prior art.
Boiler-turbine coordinated master control system is mainly made up of turbine main control and boiler master.Turbine main control completes work(in coordination mode
Rate (having pressure divergence amendment) closed loop is adjusted, and before turbine follow mode completes machine, pressure is adjusted.Boiler master is in coordination mode
The regulation of pressure (having power drift correction) closed loop is completed, pressure is adjusted before boiler follow mode completes machine.Boiler master is exported
Directly as fuel command, fuel feedback has the amendment of drum pressure differential.
The test is carried out by the way of partial simulation is combined with part actual motion.The test using partial simulation with
The mode that part actual motion combines is carried out.Disconnect main vapour pressure, generator power, the first stage pressure of steam turbine, drum pressure
Be connected with the software of on-site signal Deng signal, be allowed to connect the relevant parameter of phantom, boiler main fuel trip resets, actually start to
Powder machine, carries out dynamic tuning to fuel control system first, the major parameter of boiler-turbine coordinated master control system is sent out imitate afterwards
It is true to test, and carry out corresponding mode switching, accident treatment (RB modes) test.In test, each main related system state is as follows
Table one:
Table one:Each related system state catalog during l-G simulation test
Claims (3)
1. fired power generating unit coordinated control system pilot system, the system include fired power generating unit coordinated control system, it is characterised in that
The fired power generating unit coordinated control system pilot system also includes fired power generating unit coordinated control system assay device, the thermal motor
Group coordinated control system assay device is independently arranged with fired power generating unit coordinated control system;The fired power generating unit coordinated control system
Assay device includes controller, is connected with input and output precision on the controller, and the input module is assisted with fired power generating unit
Adjust the signal input interface of the signal output interface connection of control system, the output precision and fired power generating unit coordinated control system
Connection.
2. fired power generating unit coordinated control system pilot system according to claim 1, it is characterised in that the fired power generating unit association
Regulation and control STS system test set processed includes power module, for powering for controller.
3. according to the arbitrary fired power generating unit coordinated control system pilot system of claim 1-2, it is characterised in that the thermoelectricity
Coordinated Control Systems are DCS control systems.
Priority Applications (1)
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CN201621065353.0U CN206039282U (en) | 2016-09-20 | 2016-09-20 | Coal -fired power unit coordinating control system testing system |
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CN201621065353.0U CN206039282U (en) | 2016-09-20 | 2016-09-20 | Coal -fired power unit coordinating control system testing system |
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CN201621065353.0U Expired - Fee Related CN206039282U (en) | 2016-09-20 | 2016-09-20 | Coal -fired power unit coordinating control system testing system |
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2016
- 2016-09-20 CN CN201621065353.0U patent/CN206039282U/en not_active Expired - Fee Related
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Granted publication date: 20170322 Termination date: 20200920 |
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