CN109828457A - The time lag compensation control method of Tunnel Ventilation System - Google Patents
The time lag compensation control method of Tunnel Ventilation System Download PDFInfo
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Abstract
The present invention provides a kind of time lag compensation control method of Tunnel Ventilation System, characterized by the following steps: S1: establishing the time lag compensation transmission function of Control System of Tunnel Ventilation；S2: the ventilation parameter of acquisition target Tunnel Ventilation System；S3: bringing the ventilation parameter into the time lag compensation transmission function, obtains the ratio of the gas pressure in the target tunnel with time lag compensation and the blower frequency in target tunnel；S4: according to the Ratio control blower working frequency of the blower frequency in the gas pressure and target tunnel in the target tunnel with time lag compensation.The present invention passes through the real-time lag time for calculating Tunnel Ventilation System, to be adjusted in advance to the blower working frequency in tunnel, to solve the problems, such as indeterminable time lag in conventional tunnel ventilated control system.
Description
Technical field
The present invention relates to tunnel ventilation field more particularly to a kind of time lag compensation control methods of Tunnel Ventilation System.
Background technique
Fresh air is sent into tunnel with ventilation equipment by tunnel ventilation by force, is diluted polluter and is discharged it tunnel
Road makes to keep good hygienic conditions in tunnel, improves visibility, guarantees traffic safety.Tunnel longitudinal ventilation control system is deposited
The inertia and large dead time the characteristics of, this is the conclusion that numerous scientific research personnel and operation management person assert.It is controlled in tunnel ventilation
In, it is a large amount of to postpone in the generally existing tunnel ventilation controlled process of delay component.Due to the presence of tunnel ventilation Time Delay, make
Obtaining Tunnel Ventilation System, control system can not timely make a response when external disturbances occur, and Time Delay will lead to control
System processed cannot be adjusted in real time by controller.The presence of tunnel ventilation Time Delay not only increases tunnel ventilation control
The overshoot and attenuation rate of system processed, and the steady-state error and accuracy of system are also reduced, so that system is difficult to work and exists
Optimal state of a control is unable to reach set system control target.
Therefore, a kind of accurate control tunnel ventilation method of compensation Control System of Tunnel Ventilation delay delay component is needed.
Summary of the invention
In view of this, the present invention provides a kind of Tunnel Ventilation System of compensation Control System of Tunnel Ventilation delay delay component
Time lag compensation control method.
The present invention provides a kind of time lag compensation control method of Tunnel Ventilation System, characterized by the following steps:
S1: the time lag compensation transmission function of Control System of Tunnel Ventilation, the calculating of the time lag compensation transmission function are established
Method is as follows:
Wherein, G (S) indicates the time lag compensation transmission function of Control System of Tunnel Ventilation, kfIndicate tunnel ventilation blower frequency
Rate coefficient, A indicate that tunnel cross-section area, ρ indicate atmospheric density in tunnel, P0Indicate that blower frequency adjusts the gas in preceding tunnel
Pressure, R indicate that tunnel ventilation resistance, V indicate tunnel clearance volume, R0Indicate gas constant, T0Indicate the absolute temperature of gas in tunnel
Degree, S indicate that the complex variable in complex frequency domain, τ indicate lag time；
S2: the ventilation parameter of acquisition target Tunnel Ventilation System；
S3: it brings the ventilation parameter into the time lag compensation transmission function, obtains the target tunnel with time lag compensation
The ratio of blower frequency in interior gas pressure and target tunnel；
S4: according to the blower frequency in the gas pressure and target tunnel in the target tunnel with time lag compensation
The working frequency of Ratio control blower.
Further, the tunnel ventilation resistance R is calculated with the following method:
Wherein, R indicates that tunnel ventilation resistance, λ indicate that frictional resistant coefficient, d indicate tunnel cross-section equivalent diameter,Tunnel
Road import local loss coefficient,Tunnel exit local loss coefficient, ρ indicate atmospheric density in tunnel, A tunnel cross-section face
Product.
Further, the lag time τ is calculated with the following method:
Wherein, v0Indicate the initial velocity of tunnel flow field, v∞Reach steady again after indicating tunnel flow field fan speed regulation
The wind speed of state, a and b are intermediate variable；
As the average speed v in tunnelvWhen greater than ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
Wherein, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate the equivalent impedance face of vehicle in tunnel
Product, AtIndicate that tunnel cross-section area, λ indicate tunnel frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance
Local loss coefficient,Tunnel exit local loss coefficient, ρ indicate atmospheric density in tunnel, AtIndicate tunnel cross-section area,
Wherein, NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet stream wind
Machine Outlet Section area, vjIndicating the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel,
AvmIndicate the equivalent impedance area of vehicle in tunnel, vvIndicate average speed in tunnel, AtIndicate tunnel cross-section area；
As the average speed v in tunnelvWhen less than ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate the equivalent impedance area of vehicle in tunnel, At
Indicate that tunnel cross-section area, λ indicate tunnel frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance part
Loss coefficient,Tunnel exit local loss coefficient, AtIndicate tunnel cross-section area,
NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet blower outlet
Cross-sectional area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIt indicates
The equivalent impedance area of vehicle, v in tunnelvIndicate average speed in tunnel, AtIndicate tunnel cross-section area；
As the average speed v in tunnelvWhen equal to ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
Wherein, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AtIndicate that tunnel cross-section area, λ indicate tunnel
Frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance local loss coefficient,Tunnel exit locally damages
Coefficient is lost, ρ indicates atmospheric density in tunnel, AtIndicate tunnel cross-section area,
NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet blower outlet
Cross-sectional area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AtIndicate tunnel
Road cross-sectional area.
Beneficial effects of the present invention: the present invention is led to by establishing the time lag compensation transmission function of Control System of Tunnel Ventilation
The real-time lag time for calculating and obtaining Tunnel Ventilation System is spent, so that the blower working frequency in tunnel is adjusted in advance,
To solve the problems, such as indeterminable time lag in conventional tunnel ventilated control system, realizes and to be ensured with the smallest energy consumption
The beneficial effect of air pollution degree and vision visibility within the scope of national Specification allows in tunnel.
Specific embodiment
The time lag that the present invention provides a kind of Tunnel Ventilation System of compensation Control System of Tunnel Ventilation delay delay component is mended
Repay control method.
The present invention provides a kind of time lag compensation control method of Tunnel Ventilation System, characterized by the following steps:
S1: the time lag compensation transmission function of Control System of Tunnel Ventilation, the calculating of the time lag compensation transmission function are established
Method is as follows:
Wherein, G (S) indicates the time lag compensation transmission function of Control System of Tunnel Ventilation, kfIndicate tunnel ventilation blower frequency
Rate coefficient, A indicate that tunnel cross-section area, ρ indicate atmospheric density in tunnel, P0Indicate that blower frequency adjusts the gas in preceding tunnel
Pressure, R indicate that tunnel ventilation resistance, V indicate tunnel clearance volume, R0Indicate gas constant, T0Indicate the absolute temperature of gas in tunnel
Degree, S indicate the complex variable in complex frequency domain, and wherein S indicates that complex field S, τ of the time domain t after Laplace transformation indicate lag time；
S2: the ventilation parameter of acquisition target Tunnel Ventilation System；
S3: it brings the ventilation parameter into the time lag compensation transmission function, obtains the target tunnel with time lag compensation
The ratio of blower frequency in interior gas pressure and target tunnel；
S4: according to the blower frequency in the gas pressure and target tunnel in the target tunnel with time lag compensation
The working frequency of Ratio control blower.
In the present embodiment, by the wind in the gas pressure and target tunnel in the target tunnel with time lag compensation
The ratio of unit frequency inputs Control System of Tunnel Ventilation, and the Tunnel Ventilation System uses existing single-chip microcontroller or main controller,
PLC control system is selected in the present embodiment, and the gas in the tunnel with time lag compensation is prestored in the PLC control system
The ratio and blower working frequency mapping table, PLC control system of blower frequency in pressure and target tunnel pass through transmitting
Function calculates the ratio of the blower frequency in gas pressure and target tunnel in the tunnel with time lag compensation, then basis
The mapping table finds out the corresponding working frequency of ratio, exports control signal by controller, and controls frequency converter adjustment tunnel
Road inner blower working frequency.
Pollutant in tunnel is mainly derived from the tail gas of motor vehicle emission, and the major pollutants in vehicle exhaust are an oxidation
Carbon and smog.Carbonomonoxide concentration in tunnel is diluted to the level of security not being detrimental to health, is tunnel ventilation control
The main task of system.Smoke particle will cause visibility in tunnel and reduce, and influence driving vision, direct relation traffic safety.
Vehicle when entering tunnel the flowing of caused natural wind can take away a part of tail gas.In the not high feelings of the little pollution level of vehicle flowrate
Under condition, the flowing of gas caused by vehicle is mobile can be such that the air quality in tunnel maintains within safe range, but with vehicle
The increase of flow, speed slow down, and exhaust emissions amount rises rapidly, and the tail gas of motor vehicle emission at this time is difficult to cause by automobile movement
Gas flowing send, must be aerated in this case by Tunnel Ventilation System.Therefore, Control System of Tunnel Ventilation
Purpose is to ensure that air pollution degree in tunnel and vision visibility permit in national Specification with the smallest energy consumption
Perhaps within the scope of.But tunnel ventilation has stronger hysteresis quality, to ensure what the air quality in tunnel was up to state standards
Regulation reduces blower working frequency after needing to improve in advance by Control System of Tunnel Ventilation.
The present invention passes through to calculate and obtains tunnel ventilation by establishing the time lag compensation transmission function of Control System of Tunnel Ventilation
The real-time lag time of system, to be adjusted in advance to the blower working frequency in tunnel, so that it is logical to solve conventional tunnel
Indeterminable time lag problem in wind control system is realized and ensures the air pollution journey in tunnel with the smallest energy consumption
The beneficial effect of degree and vision visibility within the scope of national Specification allows.
In the present embodiment, the tunnel ventilation resistance R is calculated with the following method:
Wherein, R indicates that tunnel ventilation resistance, λ indicate that frictional resistant coefficient, d indicate tunnel cross-section equivalent diameter,Tunnel
Road import local loss coefficient,Tunnel exit local loss coefficient, ρ indicate atmospheric density in tunnel, A tunnel cross-section face
Product.
In the present embodiment, the lag time τ is calculated with the following method:
Wherein, v0Indicate the initial velocity of tunnel flow field, v∞Reach steady again after indicating tunnel flow field fan speed regulation
The wind speed of state, a and b are intermediate variable；
As the average speed v in tunnelvWhen greater than ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
Wherein, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate the equivalent impedance face of vehicle in tunnel
Product, AtIndicate that tunnel cross-section area, λ indicate tunnel frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance
Local loss coefficient,Tunnel exit local loss coefficient, ρ indicate atmospheric density in tunnel, AtIndicate tunnel cross-section area,
Wherein, NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet stream wind
Machine Outlet Section area, vjIndicating the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel,
AvmIndicate the equivalent impedance area of vehicle in tunnel, vvIndicate average speed in tunnel, AtIndicate tunnel cross-section area；
As the average speed v in tunnelvWhen less than ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate the equivalent impedance area of vehicle in tunnel, At
Indicate that tunnel cross-section area, λ indicate tunnel frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance part
Loss coefficient,Tunnel exit local loss coefficient, AtIndicate tunnel cross-section area,
NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet blower outlet
Cross-sectional area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIt indicates
The equivalent impedance area of vehicle, v in tunnelvIndicate average speed in tunnel, AtIndicate tunnel cross-section area；
As the average speed v in tunnelvWhen equal to ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
Wherein, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AtIndicate that tunnel cross-section area, λ indicate tunnel
Frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance local loss coefficient,Tunnel exit locally damages
Coefficient is lost, ρ indicates atmospheric density in tunnel, AtIndicate tunnel cross-section area,
NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet blower outlet
Cross-sectional area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AtIndicate tunnel
Road cross-sectional area.
The accurate calculation of lag time can effectively improve the control precision of Control System of Tunnel Ventilation, thus energy conservation,
On the basis of cutting operating costs, the air quality relevant regulations that meet national standards in tunnel are ensured.
In the present embodiment, the Control System of Tunnel Ventilation is PLC control system.The PLC control system passes through change
Frequency device controls the work frequency of ground fan in tunnel.Certainly, the PLC control system uses existing PLC control system, institute
Frequency converter is stated using existing frequency converter.
The ventilation coefficient in the target tunnel includes target tunnel clearance volume V, gas constant R0, gas in target tunnel
Absolute temperature T0, target tunnel ventilation blower frequency adjust before air pressure P in target tunnel0, target tunnel ventilation resistance R, mesh
Mark tunnel ventilation blower coefficient of frequency kf, atmospheric density ρ in target tunnel cross-section area A and target tunnel, jet stream wind in tunnel
The total number of units N of machinej, the intensification factor K of jet blowerj, jet blower Outlet Section area Af, the speed v of jet blower outletj, tunnel
Vehicle serial number K, L in road indicate length of tunnel, the equivalent impedance area A of vehicle in tunnelvm, indicate average speed in tunnel
vv, tunnel cross-section area At。
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (3)
1. a kind of time lag compensation control method of Tunnel Ventilation System, characterized by the following steps:
S1: the time lag compensation transmission function of Control System of Tunnel Ventilation, the calculation method of the time lag compensation transmission function are established
It is as follows:
Wherein, G (S) indicates the time lag compensation transmission function of Control System of Tunnel Ventilation, kfIndicate tunnel ventilation blower frequency system
Number, A indicate that tunnel cross-section area, ρ indicate atmospheric density in tunnel, P0Indicate that blower frequency adjusts the air pressure in preceding tunnel, R table
Show that tunnel ventilation resistance, V indicate tunnel clearance volume, R0Indicate gas constant, T0Indicate the absolute temperature of gas in tunnel, S table
The complex variable given instructions in reply in frequency domain, τ indicate lag time；
S2: the ventilation parameter of acquisition target Tunnel Ventilation System；
S3: bringing the ventilation parameter into the time lag compensation transmission function, obtains in the target tunnel with time lag compensation
The ratio of blower frequency in gas pressure and target tunnel；
S4: according to the ratio of the blower frequency in the gas pressure and target tunnel in the target tunnel with time lag compensation
Control the working frequency of blower.
2. the time lag compensation control method of Tunnel Ventilation System according to claim 1, it is characterised in that: the tunnel is logical
Wind resistance R is calculated with the following method:
Wherein, R indicates that tunnel ventilation resistance, λ indicate that frictional resistant coefficient, d indicate tunnel cross-section equivalent diameter,Tunnel entrance
Local loss coefficient,Tunnel exit local loss coefficient, ρ indicate atmospheric density in tunnel, A tunnel cross-section area.
3. the time lag compensation control method of Tunnel Ventilation System according to claim 1, it is characterised in that: when the lag
Between τ, with the following method calculate:
Wherein, v0Indicate the initial velocity of tunnel flow field, v∞Again reach the wind of stable state after expression tunnel flow field fan speed regulation
Speed, a and b are intermediate variable；
As the average speed v in tunnelvWhen greater than ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
Wherein, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate the equivalent impedance area of vehicle in tunnel,
AtIndicate that tunnel cross-section area, λ indicate tunnel frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance office
Portion's loss coefficient,Tunnel exit local loss coefficient, ρ indicate atmospheric density in tunnel, AtIndicate tunnel cross-section area,
Wherein, NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate that jet blower goes out
Mouth cross-sectional area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmTable
Show the equivalent impedance area of vehicle in tunnel, vvIndicate average speed in tunnel, AtIndicate tunnel cross-section area；
As the average speed v in tunnelvWhen less than ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate the equivalent impedance area of vehicle in tunnel, AtIt indicates
Tunnel cross-section area, λ indicate tunnel frictional resistant coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance local losses
Coefficient,Tunnel exit local loss coefficient, AtIndicate tunnel cross-section area,
NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet blower Outlet Section
Area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AvmIndicate tunnel
The equivalent impedance area of interior vehicle, vvIndicate average speed in tunnel, AtIndicate tunnel cross-section area；
As the average speed v in tunnelvWhen equal to ventilation speed v in tunnel,
The intermediate variable a is calculated with the following method:
Wherein, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AtIndicate that tunnel cross-section area, λ indicate tunnel along journey
Resistance coefficient, deIndicate tunnel cross-section equivalent diameter,Tunnel entrance local loss coefficient,Tunnel exit local losses system
Number, ρ indicate atmospheric density in tunnel, AtIndicate tunnel cross-section area,
NjIndicate the total number of units of jet blower in tunnel, KjIndicate the intensification factor of jet blower, AfIndicate jet blower Outlet Section
Area, vjIndicate the speed of jet blower outlet, K indicates the vehicle serial number in tunnel, and L indicates length of tunnel, AtIndicate that tunnel is disconnected
Face area.
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