CN202737756U - Anti-disturbance controller for rectifying device in direct-drive permanent magnetism synchronization wind power generation system - Google Patents

Anti-disturbance controller for rectifying device in direct-drive permanent magnetism synchronization wind power generation system Download PDF

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CN202737756U
CN202737756U CN 201220279915 CN201220279915U CN202737756U CN 202737756 U CN202737756 U CN 202737756U CN 201220279915 CN201220279915 CN 201220279915 CN 201220279915 U CN201220279915 U CN 201220279915U CN 202737756 U CN202737756 U CN 202737756U
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input
disturbance
circuit module
control circuit
monocycle
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张红斌
王红胜
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GUANGDONG DI AO TECHNOLOGY ENGINEERING Ltd
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GUANGDONG DI AO TECHNOLOGY ENGINEERING Ltd
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Abstract

The utility model discloses an anti-disturbance controller for a rectifying device in a direct-drive permanent magnetism synchronization wind power generation system, and the anti-disturbance controller comprises a single period control circuit module inhibiting input disturbances and a PID control circuit module inhibiting load disturbances, an improved single period anti-disturbance controller is employed, stable state and dynamic errors of a switch variable can be completely inhibited by the single period control, so a filter circuit can be decoupled from front circuits in a design of a main circuit, a newly added PID control ring compensates and amplifies errors between an input voltage and a reference voltage, and a reference value of the single period control is replaced, a purpose of flexiblely adjusting duty ratio is reached, stable errors brought by nonideality of elements are reduced, load adjusting scope is increased, and transition process is accelerated; and because an improved narrow pulse generator is employed, all time information of the switch variable is effectively obtained by an integrator, and stable errors are minimized.

Description

The interference guard movement controller of rectifying device in the direct drive permanent magnetic synchronous wind generating system
Technical field
The utility model relates to a kind of direct drive permanent magnetic synchronous wind generating system, specifically the interference guard movement controller of rectifying device in a kind of direct drive permanent magnetic synchronous wind generating system.
Background technology
The rectifying device front end is input as the Converting frequency ﹠ amplitude alternating current that blower fan sends in the direct drive permanent magnetic synchronous wind generating system, randomness is large, in order to solve the problem of input disturbance, traditional mode adopts the one-cycle control technique, and this technology is a kind of nonlinear Control technology of pulse type, and this technology has been utilized pulse characteristic and the nonlinear characteristic of switch converters, realize the instant control of voltage or current average, the characteristics such as have fast response time, robustness is good, and anti-input disturbance ability is strong.
Monocycle control was proposed based on the Buck circuit by Keyue M.Semdley in early 1990s, it is a kind of large-signal nonlinear Control mode, its basic thought is: the ON time of power ratio control switching tube or turn-off time, in each switch periods, make the switching variable mean value of power switch converter strictly equal the control reference or be referenced into ratio with control in stable state or transient state.The maximum characteristics of this control are the disturbances that can effectively resist input side in a switch periods.The below specifically illustrates the principle of one-cycle control as an example of the Buck converter example, as shown in Figure 3.
Process is established circuit working in stable state to simplify the analysis, and filter inductance L and filter capacitor C are enough large, to such an extent as within a work period, output voltage and electric current can be regarded steady state value as, and Q is the perfect switch pipe, and D is ideal diode, switching frequency
Figure 2012202799157100002DEST_PATH_IMAGE001
Be fixed value.
When circuit works, open pulse by the control circuit that trigger forms with the constant frequency generation, open power tube Q, the voltage of diode D
Figure 2012202799157100002DEST_PATH_IMAGE002
Deliver to integrator (the integrator initial condition is zero), work as integrator output voltage Reach given voltage The time, comparator output is overturn, rest-set flip-flop sends signal closes switch pipe Q, meanwhile, rest-set flip-flop send the real-time integrator of reset enable signal be reset to zero, for next cycle ready, work wave is shown in Fig. 3-2.Through above analysis, we can draw governing equation as shown in the formula:
Figure DEST_PATH_IMAGE005
（3-1）
If given signal
Figure 133389DEST_PATH_IMAGE004
Be constant, the average voltage of diode Be constant just, thus output voltage
Figure 2012202799157100002DEST_PATH_IMAGE006
Be constant just.
In monocycle control, duty ratio is determined by following formula:
Figure DEST_PATH_IMAGE007
（3-2）
As seen, duty ratio d is input voltage
Figure 2012202799157100002DEST_PATH_IMAGE008
And reference voltage
Figure 82464DEST_PATH_IMAGE004
Nonlinear function, thereby this control mode belongs to nonlinear Control.Because the existence of this nonlinear Control, so that The place average voltage in each switch periods all with
Figure 354362DEST_PATH_IMAGE004
Identical, and and input voltage
Figure 176824DEST_PATH_IMAGE008
Size is irrelevant.Like this, output voltage
Figure 506175DEST_PATH_IMAGE006
It is reference voltage
Figure 767392DEST_PATH_IMAGE004
Linear function:
（3-3）
If this control method can realize, so
Figure 498587DEST_PATH_IMAGE008
Transient process will in a switch periods, finish, thereby this kind control method is defined as monocycle control.
One-cycle control discussed above is based under the constant switching frequency and derives out.In fact, this theory is applicable to any type of switch, comprising: constant frequency switch, permanent ON time switch, permanent turn-off time and change conducting, turn-off time switch.The below discusses with regard to the general theory of monocycle control.
Suppose that power switch pipe Q is with certain frequency
Figure 2012202799157100002DEST_PATH_IMAGE010
The switch function of work
Figure DEST_PATH_IMAGE011
, that is:
Figure DEST_PATH_IMAGE012
（3-4）
In the formula:
Figure DEST_PATH_IMAGE013
Represent service time,
Figure DEST_PATH_IMAGE014
The expression turn-off time, With
Figure 560795DEST_PATH_IMAGE014
Satisfy
Figure DEST_PATH_IMAGE015
, the duty ratio of switch
Figure DEST_PATH_IMAGE016
, Be the input signal of switch,
Figure DEST_PATH_IMAGE018
Be output signal,
Figure 484757DEST_PATH_IMAGE018
,
Figure 70459DEST_PATH_IMAGE011
With
Figure 500304DEST_PATH_IMAGE017
Relation
Figure 804246DEST_PATH_IMAGE018
=
Figure 141686DEST_PATH_IMAGE011
Figure 785157DEST_PATH_IMAGE017
Suppose switching frequency
Figure 197289DEST_PATH_IMAGE001
Be higher than input signal far away And given reference signal
Figure DEST_PATH_IMAGE019
Frequency band, namely
Figure 129659DEST_PATH_IMAGE017
With
Figure 689953DEST_PATH_IMAGE019
All can be considered slow variable signal.For tradition control, duty ratio
Figure DEST_PATH_IMAGE020
By
Figure 523917DEST_PATH_IMAGE019
Linear modulation forms, modulation relation as shown in the formula:
Figure 536872DEST_PATH_IMAGE020
=
Figure 481695DEST_PATH_IMAGE019
（3-5）
Therefore there is following formula:
Figure DEST_PATH_IMAGE021
（3-6）
So, when using traditional Voltage Feedback control, switch output signal
Figure 896496DEST_PATH_IMAGE018
Be output signal
Figure 904290DEST_PATH_IMAGE017
With given reference signal
Figure 404542DEST_PATH_IMAGE019
Product, input signal
Figure 825159DEST_PATH_IMAGE017
Variation, must cause output
Figure 360045DEST_PATH_IMAGE018
Variation.If adopt the non-linear modulation of duty ratio, its principle is to guarantee in each switch periods switch output signal
Figure 535812DEST_PATH_IMAGE018
Integrated value and reference signal
Figure 461042DEST_PATH_IMAGE019
Integrated value identical, that is:
Figure DEST_PATH_IMAGE022
（3-7）
The physical significance of following formula is in one-period, switch output signal Mean value and reference signal
Figure 933798DEST_PATH_IMAGE019
Mean value identical.So switch output signal
Figure 218149DEST_PATH_IMAGE018
But only need in a switch periods just tracing preset signal
Figure 692993DEST_PATH_IMAGE019
, that is:
Figure DEST_PATH_IMAGE023
（3-8）
This nonlinear control technology is called one-cycle control.Under this control thought, the mean value of switch output signal is only relevant with given signal, namely
Figure DEST_PATH_IMAGE024
, switch output signal
Figure 786238DEST_PATH_IMAGE018
Suppress the impact of input signal fully, reproduced linearly given signal
Figure 30137DEST_PATH_IMAGE019
Therefore, monocycle control has become a nonlinear switching into a linear switch, is a kind of nonlinear Control technology.
Can find out by above-mentioned analysis, for input signal
Figure 219810DEST_PATH_IMAGE017
Disturbance, the transient process of switch output signal mean value is at one In just can finish; For the disturbance of load, because there is internal resistance in input signal source, thereby output signal
Figure 181950DEST_PATH_IMAGE018
Amplitude also have disturbance, the transient process of switch output signal mean value is at one In also can finish.
So the monocycle is controlled input signal
Figure 174363DEST_PATH_IMAGE017
Disturbance, output signal
Figure 534937DEST_PATH_IMAGE018
The disturbance of place's load all has the inhibition ability fully, can guarantee signal
Figure 984373DEST_PATH_IMAGE018
If mean value constant is but outlet side
Figure 354174DEST_PATH_IMAGE018
Behind the LC filter, the mean value of output signal will be disturbed.Monocyclic feedback sample point is before the LC filter, disturbance for rear class, being equivalent to open loop processes, therefore can not the establishment load disturbance, that is to say, the disturbance of the anti-load of the anti-input side disturbance energy force rate of one-cycle control is strong, and its dynamic property is better than voltage-type, current mode instantaneous value control technology, but behind the LC filter, the stable state accuracy of output voltage is not as good as voltage-type, current-mode control technology.
Summary of the invention
The purpose of this utility model be to provide a kind of can not only the establishment input disturbance, and the interference guard movement controller of rectifying device in can also the direct drive permanent magnetic synchronous wind generating system of establishment load disturbance.
For solving the problems of the technologies described above, the utility model will be controlled with traditional PID control and combine the monocycle, on the basis of monocycle control, increase a traditional output voltage feedback control loop, and this technical scheme is as follows:
The interference guard movement controller of rectifying device in the direct drive permanent magnetic synchronous wind generating system, it is the PID control circuit module composition by the monocycle control circuit module that suppresses input disturbance and inhibition load disturbance, the monocycle control circuit module of described inhibition input disturbance is to be made of narrow-pulse generator, master controller, comparator, integrator and polarity converter, master controller and narrow-pulse generator are electrically connected, and narrow-pulse generator is electrically connected with reset switch on the integrator; The diode voltage of the input of filter circuit is sent into comparator by integrator after polarity converter carries out ratio and reversal, comparator is sent comparative result into master controller, forms the control ring in the monocycle; The output voltage of filter circuit is sent into the PID control circuit module that suppresses load disturbance after the dividing potential drop sampling, suppress the PID control circuit module of load disturbance the error of output voltage and reference voltage is sent into comparator after compensation is amplified, as a comparison the reference value of the monocycle of device control.
Described narrow-pulse generator mainly contains NOR gate logic controller, electric capacity and earth resistance and consists of, be electrically connected from the driving voltage of the switching tube input as input signal one tunnel direct NAND gate logic controller, another road is electrically connected through another input of electric capacity ANDORNOTgate logic controller, and earth resistance is connected on the connecting line between the electric capacity ANDORNOTgate logic controller.
The beneficial effects of the utility model: owing to adopted the monocycle interference guard movement controller after the improvement, because monocycle control can suppress switching variable completely
Figure DEST_PATH_IMAGE026
Stable state and dynamic error, in the design of main circuit, just filter circuit and previous circuit decoupling zero can be come, the impact that the PID control section also only needs the variation of consideration rear class load current to bring, design process is simplified, have better flexibility, can be controlled better performance.And newly-increased PID control ring, with the error reference value that the replacement monocycle is controlled after compensation is amplified of output voltage and reference voltage
Figure 307087DEST_PATH_IMAGE004
Thereby reach the purpose of flexible adjustment duty ratio, reduced the steady-state error that the element imperfection is brought, increased the adjustment of load scope, accelerated transient process, so this circuit had both changed the deficiency of monocycle control method load regulation weakness, inherited again it input disturbance has been suppressed the strong advantage of ability; Owing to adopting the narrow-pulse generator after improving, in each switch periods, integrating capacitor need not be reset to no-voltage, but resets to arbitrary initial value in the time in fixing burst pulse, when next cycle arrived, integral voltage continued to increase on the basis of upper once integration.If controlled switching signal amplitude is higher, integrator initial value after then resetting is larger, thereby integrator output arrives the corresponding shortening of time of control benchmark in the next cycle, thereby all temporal informations of switching variable all are integrated device and effectively obtain, and steady-state error is reduced.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is electrical schematic diagram of the present utility model;
Fig. 2 is the electrical schematic diagram of narrow-pulse generator shown in Figure 1;
Fig. 3 is the electrical schematic diagram of controlling traditional monocycle.
Among the figure: the PID control circuit module that 1, suppresses load disturbance; 2, narrow-pulse generator; 3, master controller; 4, comparator; 5, integrator; 6, polarity converter; 7, reset switch; 8, filter circuit.
Embodiment
As shown in Figure 1, the interference guard movement controller of rectifying device in the direct drive permanent magnetic synchronous wind generating system, it is to be made of the monocycle control circuit module that suppresses input disturbance and the PID control circuit module 1 that suppresses load disturbance, the monocycle control circuit module of described inhibition input disturbance is to be made of narrow-pulse generator 2, master controller 3, comparator 4, integrator 5 and polarity converter 6, master controller 3 and narrow-pulse generator 2 is electrically connected, and narrow-pulse generator 2 is electrically connected with reset switch 7 on the integrator 5; The diode voltage of the input of filter circuit 8
Figure 166458DEST_PATH_IMAGE026
After polarity converter 6 carries out ratio and reversal, send into comparator 4 by integrator 5, comparator 4 is sent comparative result into master controller 3, forms the control ring in the monocycle; The output voltage of filter circuit 8
Figure DEST_PATH_IMAGE027
After the dividing potential drop sampling, send into the PID control circuit module 1 that suppresses load disturbance, suppress the PID control circuit module 1 of load disturbance the error of output voltage and reference voltage is sent into comparator 4 after compensation is amplified, as a comparison the reference value of the monocycle of device 4 control
Figure 840541DEST_PATH_IMAGE004
As shown in Figure 2, described narrow-pulse generator 2 mainly contains NOR gate logic controller U1, capacitor C 1 and earth resistance R2 and consists of, from the driving voltage of switching tube
Figure DEST_PATH_IMAGE028
Input as input signal one tunnel direct NAND gate logic controller U1 is electrically connected, another road is electrically connected through another input of capacitor C 1 ANDORNOTgate logic controller U1, and earth resistance R2 is connected on the connecting line between the capacitor C 1 ANDORNOTgate logic controller U1.Output signal
Figure DEST_PATH_IMAGE029
Deliver to the reset switch control end, when
Figure 138667DEST_PATH_IMAGE029
During for high level, the reset circuit action.The lower NOR gate of normal operation
Figure DEST_PATH_IMAGE030
Be output as low level, only at the trailing edge of drive pulse signal,
Figure DEST_PATH_IMAGE031
Can be low in short-term, output
Figure 211665DEST_PATH_IMAGE029
Just the high level burst pulse can occur, pulse duration is by time constant Determine.
The effect of narrow-pulse generator is most important, the part of Cycle Control most critical is the integrator that band resets, and the one-cycle control technique is based upon on the integrator instant reset basis, so in order to guarantee integral accuracy, requirement integrator in each work period must be reset to no-voltage, when next switch periods arrives, the integration of again starting from scratch.But because the existence of parasitic parameter in the circuit, logic controller is limited to the calibration capability of switch error simultaneously, and there is certain steady-state error in system.Effectively obtain if allow the free information of switch variable all be integrated device, just can effectively reduce the steady-state error of monocycle control change device.For reaching this purpose, just require reset signal satisfying under the prerequisite that reliably makes zero, resetting time is as far as possible short, it is impossible eliminating resetting time fully, therefore adopt the burst pulse repositioning, strictly control the time that integrator resets, drop to the systematic steady state error minimum.
The above is preferred implementation of the present utility model, certainly can not limit with this interest field of the utility model.Should be pointed out that for those skilled in the art, the technical solution of the utility model is made amendment or is equal to replacement, do not break away from protection range of the present utility model.

Claims (2)

1. the interference guard movement controller of rectifying device in the direct drive permanent magnetic synchronous wind generating system, it is characterized in that: it is the PID control circuit module composition by the monocycle control circuit module that suppresses input disturbance and inhibition load disturbance, the monocycle control circuit module of described inhibition input disturbance is to be made of narrow-pulse generator, master controller, comparator, integrator and polarity converter, master controller and narrow-pulse generator are electrically connected, and narrow-pulse generator is electrically connected with reset switch on the integrator; The diode voltage of the input of filter circuit is sent into comparator by integrator after polarity converter carries out ratio and reversal, comparator is sent comparative result into master controller, forms the control ring in the monocycle; The output voltage of filter circuit is sent into the PID control circuit module that suppresses load disturbance after the dividing potential drop sampling, suppress the PID control circuit module of load disturbance the error of output voltage and reference voltage is sent into comparator after compensation is amplified, as a comparison the reference value of the monocycle of device control.
2. the interference guard movement controller of rectifying device in the direct drive permanent magnetic synchronous wind generating according to claim 1 system, it is characterized in that: described narrow-pulse generator mainly contains NOR gate logic controller, electric capacity and earth resistance and consists of, be electrically connected from the driving voltage of the switching tube input as input signal one tunnel direct NAND gate logic controller, another road is electrically connected through another input of electric capacity ANDORNOTgate logic controller, and earth resistance is connected on the connecting line between the electric capacity ANDORNOTgate logic controller.
CN 201220279915 2012-06-14 2012-06-14 Anti-disturbance controller for rectifying device in direct-drive permanent magnetism synchronization wind power generation system Expired - Fee Related CN202737756U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103117663A (en) * 2013-03-13 2013-05-22 常州工学院 Single-cycle control three-phase PWM (pulse-width modulation) rectification method by injection of virtual current
CN110112912A (en) * 2019-06-03 2019-08-09 广东工业大学 A kind of control circuit of high-gain converter, method and power-supply system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103117663A (en) * 2013-03-13 2013-05-22 常州工学院 Single-cycle control three-phase PWM (pulse-width modulation) rectification method by injection of virtual current
CN103117663B (en) * 2013-03-13 2014-10-22 常州工学院 Single-cycle control three-phase PWM (pulse-width modulation) rectification method by injection of virtual current
CN110112912A (en) * 2019-06-03 2019-08-09 广东工业大学 A kind of control circuit of high-gain converter, method and power-supply system
CN110112912B (en) * 2019-06-03 2020-04-28 广东工业大学 Control circuit and method of high-gain converter and power supply system

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Granted publication date: 20130213

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