CN209731125U

CN209731125U - Cement clinker production line kiln owner's driving control system

Info

Publication number: CN209731125U
Application number: CN201822211113.2U
Authority: CN
Inventors: 谢子晋; 石建伟
Original assignee: HUBEI EMERSON AUTOMATION SYSTEM ENGINEERING CO LTD
Current assignee: HUBEI EMERSON AUTOMATION SYSTEM ENGINEERING CO LTD
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2019-12-03
Anticipated expiration: 2028-12-26

Abstract

The utility model discloses a kind of cement clinker production line kiln owner driving control systems comprising sequentially connected model-free adaption device, Direct Torque Control module, frequency converter, motor and rotary kiln；The model-free adaption device includes that model-free adaptive controller and single input list go out system, the input terminal of the model-free adaptive controller is manually entered given torque, and the output end of the model-free adaptive controller connects the input terminal of the single-input single-output system；The frequency converter includes that a diode rectifier circuit, intermediate loop and inverter bridge, three are sequentially connected with；The input terminal of the Direct Torque Control module connects the output end of the single-input single-output system, and the output end of the Direct Torque Control module connects the diode rectifier circuit；The output end of the inverter bridge connects the motor, and the motor connects the input terminal of the Direct Torque Control module.The utility model improves the stability of control system, energy conservation.

Description

Cement clinker production line kiln owner's driving control system

Technical field

The utility model relates to cement clinker production line technical fields more particularly to a kind of cement clinker production line kiln owner to pass Autocontrol system.

Background technique

Cement industry has been state key compression and rectification industry as highly energy-consuming trade, and grassroot project will increasingly collect Middle large-scale production, to reduce specific energy consumption.Domestic most of rotary kilns are all made of Direct Current Governor System, DC speed regulation at present Higher starting current is needed when direct current generator used by system starts, and greater impact is caused to power grid, to pollute power grid matter Amount.And kiln owner passes when operating in low speed, because of the characteristic of fully controlled bridge rectification, the harmonic component of generation is higher, and power factor is very low, And then power consumption cost is greatly increased, it is unfavorable for energy-saving and emission-reduction, therefore there is an urgent need to a kind of new-type cement clinker production line kiln owners Driving control system.

Utility model content

The utility model provides a kind of cement clinker production line kiln owner driving control system, improves the stabilization of control system Property, torque balance when operation, energy conservation.

The utility model uses following technical scheme:

Cement clinker production line kiln owner's driving control system, comprising: sequentially connected model-free adaption device directly turns Square control module, frequency converter, motor and rotary kiln；

The model-free adaption device includes model-free adaptive controller and single input list goes out system, the model-free The input terminal of adaptive controller is manually entered given torque, and the output end of the model-free adaptive controller connects the list The input terminal of single-input single-output system (SISO system)；

The frequency converter includes that a diode rectifier circuit, intermediate loop and inverter bridge, three are sequentially connected with；

The input terminal of the Direct Torque Control module connects the output end of the single-input single-output system, described direct The output end of torque control module connects the diode rectifier circuit；

The output end of the inverter bridge connects the motor, and the motor connects the input of the Direct Torque Control module End.

Further, the motor is hysteresis machine.

Further, the Direct Torque Control module includes motor nameplate data identification module, the motor nameplate number The magnetic flux vector of the motor is calculated according to the nameplate data of the motor according to identification module.

Preferably, the frequency converter is 380V frequency converter or 690V frequency converter.

Beneficial effect

The utility model is constantly learnt by the model-free adaption device based on artificial neural network, on-line manner Constantly reduce the deviation e (t) between output torque setting value r (t) and output torque y (t), to adjust output torque to meet When rotary kiln loads and starts, since cement material is in bottom accumulation and cylinder inertia resistance, frictional resistance motor and change The very big staring torque of frequency device eliminates mechanical resonance to realize the soft start of rotary kiln, realizes electrodeless tune Speed, improves the stability of control system, and torque balance when operation, Alternating Current Governor System is replaced Traditional DC speed-regulating system, avoided Greater impact is caused to power grid, reaches energy-saving effect.In addition, the knot of model-free adaption device and Direct Torque Control module It closes, the overload characteristic and environment for substantially increasing cement clinker production line kiln owner's driving control system adapt to can.

Detailed description of the invention

Fig. 1 is that a kind of structure of cement clinker production line kiln owner driving control system provided by the embodiment of the utility model is shown It is intended to；

Fig. 2 is the control system architecture schematic diagram of MFA control platform in Fig. 1；

Fig. 3 is the control structure schematic diagram of model-free adaptive controller in Fig. 2；

Fig. 4 is the electrical block diagram of frequency converter in Fig. 1；

Fig. 5 is the structural schematic diagram of Direct Torque Control module in Fig. 1.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe.

It is a kind of cement clinker production line kiln owner driving control system provided by the embodiment of the utility model referring to Fig. 1 Structural schematic diagram.

Cement clinker production line kiln owner's driving control system, including sequentially connected model-free adaption device 100, directly Torque control module 200, frequency converter 300, motor 400 and rotary kiln 500, motor 400 are hysteresis machine；Optionally, model-free Self-reacting device 100 be computer, server and/or with from communication computing function device.

Model-free adaption device 100 include model-free adaptive controller (MFA, Model-Free Adaptive, with Lower abbreviation " MFA controller ") and single input list go out system (SISO, Single input single output), model-free from The input terminal of the output end connection single-input single-output system of adaptive controller.

Referring to fig. 4, frequency converter 300 include a diode rectifier circuit 301, intermediate loop 302 and inverter bridge 303, three Person is sequentially connected with.Frequency converter 300 be 380V frequency converter or 690V frequency converter, to meet client to different mechanical equipment types, The requirement of load torque characteristic, speed adjustable range, static velocity precision, starting torque and use environment.

The output end of the input terminal connection single-input single-output system of Direct Torque Control module 200, Direct Torque Control The input terminal of the output end connection diode rectifier circuit 301 of module 200；The output end of inverter bridge 303 connects motor 400, electricity The input terminal of the connection Direct Torque Control module 200 of machine 400.

Referring to fig. 2, MFA controller is based on artificial neural network algorithm, and the algorithm of refreshing weight is based on a list One target, i.e. deviation between diminution setting value and process variable.The control target of MFA controller is to generate an output u (t), process variable y (t) is forced still to track in the case where set point change changes there are disturbance and dynamic characteristic of the course Setting value r (t), it is, MFA controller constantly reduces between setting value r (t) and process variable y (t) on-line manner Deviation e (t).It is handled by SISO, the virtual value of a period of time is recorded and saved by analytical calculation, it is whole to reject part-diodes The excessive invalid value of the disturbance quantity of current circuit generation harmonic component, mechanical resonance etc., then exported, it means that at process In stable state, when deviation is close to zero, do not need to modify to the weight of MFA controller namely cement clinker production line kiln Main Drive Control System control tends towards stability.When system is caused fluctuation tendency by all circles' factor, MFA system can eliminate complexity Attitude conirol, can control extreme non-linear process, control multivariable process, inhibit measurable diode rectifier circuit The disturbance such as harmonic component, mechanical resonance is generated, process variable is forced to maintain scheduled range.The user of MFA controller, is not necessarily to Controller is designed, as long as selecting corresponding controller and simply setting up controller parameter for MFA controller It comes into operation；And the MFA controller based on artificial neural network saves a part of historical data, in order to which solution preocess dynamic is special Property valuable information is provided, thus preferably control system.

Referring to Fig. 3, it is understood that be that the MFA controller uses the artificial neural network of a multilayer perceptron structure Network (ANN), have an input layer, one with N number of neuron hidden layer and a single neuron output layer.At this Have one group of weight factor (Wij and hi) that can according to need and change in neural network, thus to the behavior of MFA controller into Row adjustment.The algorithm for updating weight factor is to reduce the deviation between setting value and process variable as target.Due to its effect It is consistent with control target, therefore, MFA controller can be helped when dynamic characteristic of the course is changed using weight factor It waits and reduces deviation.

To the output torque setting value r (t) of MFA controller input converter, the output torque y of frequency converter will be collected (t) feed back to MFA controller input terminal, MFA controller constantly reduce on-line manner output torque setting value r (t) with it is defeated Deviation e (t) between torque y (t) out rejects what diode rectifier circuit generated by the processing of single-input single-output system The disturbance quantity d (t) of harmonic component or mechanical resonance etc. excessive invalid value, deviation e (t) is close to during zero, MFA controller Automatic changing weight factor (Wij and hi), so that deviation e (t) is close to zero, when deviation e (t) is close to zero, the water Mud clinker production line kiln owner's driving control system tends towards stability control.

Referring to Fig. 5, Direct Torque Control module 200 (Direct torque control, abbreviation DTC) includes revolving speed control Device, torque reference value control module, magnetic flux given value control module, switching frequency control module and Direct torque coremaking processed Piece.

The first input end of rotational speed governor is output torque y (t), and the second input terminal of rotational speed governor is Direct Torque Control the first output end (actual speed) of chip；The input terminal connection Direct Torque Control chip of switching frequency control module Second output terminal (actual frequency), the first input end of the output end connection Direct Torque Control chip of switching frequency control module (magnetic hysteresis window end)；The second output terminal of the input terminal connection Direct Torque Control chip of magnetic flux given value control module is (practical Frequency), the second input terminal (magnetic flux given value of the output end connection Direct Torque Control chip of magnetic flux given value control module ψ_ref)；The output end of the first input end connection rotational speed governor of torque reference value control module, torque reference value control module The second input terminal input absolute torque given value, the output end of torque reference value control module connects Direct Torque Control chip Third input terminal (torque reference value T_ref)；The power stage of the third output end connection motor of Direct Torque Control chip, directly 4th input terminal of direct torque chip connects power of motor grade DC loop voltage, the 5th input of Direct Torque Control chip The end connection pervious transfer sequence end of power of motor grade, the 6th input terminal connection current of electric feedback of Direct Torque Control chip End.

It include motor nameplate data identification module in the Direct Torque Control chip, the motor nameplate data identify mould Root tuber calculates the magnetic flux vector ψ of the motor according to the nameplate data of the motor_s=∫ (u_s-i_sr_s)dt.Direct Torque Control module According to the output torque and the magnetic flux vector received, under stator coordinate by the output torque and stator magnetic flux it Between (sine) angle proportional relation, calculate torque needed for exporting the motor, be maintained at a scheduled hysteresis range, from And realize the high-gain of revolving speed control.

It is also understood that DTC module relies on powerful digital processing unit (25 μ s control loop) and motor mathematical model, Without speed feedback, it is not necessarily to modulator, nothing opens mold changing formula.It is quasi- based on motor nameplate data by using adaptive electric machine model The magnetic flux vector for really calculating motor, passes through (sine) angle proportional relation between torque and stator magnetic flux.By magnetic flux given value It is compared to magnetic flux, and is maintained among a scheduled magnetic hysteresis, while torque reference value is compared to estimation (i.e. calculated) torque, And it is maintained among a scheduled magnetic hysteresis.To realize the high-gain of revolving speed control by quick direct torque, improve dynamic State precision and static accuracy, and optimize reaction to special circumstances, as power loss, over-voltage and under-voltage, rapid load change, Mechanical oscillation and without tripping etc. is interrupted, to realize ideal control be driven to cement kiln.

It may be implemented by taking 5000T grout line as an example using the present embodiment cement clinker production line kiln owner's driving control system Kiln owner is driven non-impact current starting, and (starting current is less than rated current of motor, and direct current generator starting current is up to Rated motor 2 Times or so), year system maintenance amount (containing motor) less than 1 time (DC control system year maintenance is greater than 5 times), overall power factor 90% or more is increased to by 80%.

The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit Decorations are also considered as the protection scope of the utility model.

Claims

1. cement clinker production line kiln owner's driving control system characterized by comprising sequentially connected model-free adaption dress It sets, Direct Torque Control module, frequency converter, motor and rotary kiln；

The model-free adaption device includes model-free adaptive controller and single-input single-output system, and the model-free is certainly The input terminal of adaptive controller is manually entered given torque, and it is defeated that the output end of the model-free adaptive controller connects the list Enter the input terminal of single output system；

The input terminal of the Direct Torque Control module connects the output end of the single-input single-output system, the Direct Torque The output end of control module connects the diode rectifier circuit；

The output end of the inverter bridge connects the motor, and the motor connects the input terminal of the Direct Torque Control module.

2. cement clinker production line kiln owner driving control system as described in claim 1, which is characterized in that the motor is magnetic Stagnant motor.

3. cement clinker production line kiln owner driving control system as claimed in claim 2, which is characterized in that the Direct Torque Control module includes motor nameplate data identification module, and the motor nameplate data identification module is according to the nameplate number of the motor According to the magnetic flux vector for calculating the motor.

4. cement clinker production line kiln owner driving control system as described in claim 1, which is characterized in that the frequency converter is 380V frequency converter or 690V frequency converter.