CN103312199B - The single-phase power factor correcting device that direct net side power controls - Google Patents
The single-phase power factor correcting device that direct net side power controls Download PDFInfo
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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
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Abstract
The invention provides the single-phase power factor correcting device that a kind of direct net side power controls, comprise power circuit, auxiliary circuit and control module, wherein: described power circuit completes the power conversion of single-phase AC-DC; Described auxiliary circuit connects described power circuit, completes the instantaneous detection of input voltage, input current, output voltage and the driving to original pwm pulse, and measuring electric quantity is outputted to control module; After described control module accepts the various detection electricity of described auxiliary circuit, digital operation and logical process is carried out according to direct Power Control and one circle control principle, and obtain original driving pulse, finally complete power factor correction by power circuit, and the direct voltage of stable output.The present invention realizes the single phase alternating current (A.C.)-DC converting of netting side unity power factor, have fast response time, antijamming capability strong, adapt to relative broad range load variations, and having power follower characteristic, is a kind of desirable single-phase power factor correcting scheme.
Description
Technical field
The present invention relates to a kind of single-phase power factor correcting device (PFC) of Technics of Power Electronic Conversion technical field, particularly, relate to the single-phase power factor correcting device that a kind of direct net side power controls.
Background technology
In order to the harmonic current suppressing the Single-phase AC-DC converters adopting rectifier bridge to produce, reduce harmonic current interference, make it meet harmonic current standard, need to adopt single-phase active power factor correction (PFC) technology.Single-phase active power factor correction technology has various control strategy, as double-closed-loop control, one circle control etc., can obtain good calibration result.Wherein adopt the single-phase active PFC of one circle control, power factor correction is effective, and dynamic response is fast, strong robustness.But in principle, one circle control does not relate to outer voltage, but in order to stable output dc voltage, outer voltage must be increased.Conventional voltage outer shroud generally adopts voltage error amplifier, and does not adopt PID adjuster.The inertia of voltage error amplifier is comparatively large, have impact on the dynamic responding speed of one circle control.
Direct Power Control is that a kind of direct control changed power conforms with the regulations the bang-bang control of curve, obtain in the middle of the converter of the FACTS categories such as Three-Phase PWM Rectifier, three-phase active power filter and three-way tide current controller and pay close attention to widely and study, have and respond advantage fast.In single-phase active PFC field, still there is no the precedent that this respect is applied, especially there is no the application precedent of comprehensive direct Power Control and one circle control.
Through the retrieval of the single-phase active power factor corrector prior art to employing one circle control principle, find to mainly contain following representative document:
[1] Li Dong and Ruan Xinbo. " high efficiency BOOST type power factor correction preconditioner ". Proceedings of the CSEE .V24, No.10,2004.10:153-156; Its technical characteristics is as follows: adopt UC3854BN analog controller, voltage error amplifier is as outer voltage, and response speed is affected;
[2] Hu Zongbo and Zhang Bo etc. " theory analysis of BOOST power factor correcting converter one circle control applicability and experimental verification ". Proceedings of the CSEE .V25, No.21,2005.11:19-23; Its technical characteristics is as follows: adopt voltage error amplifier as outer voltage, response speed is affected, and does not give full play to the advantage of one circle control;
[3] He Zhiyuan and Wei Wei. " the PWM rectifier direct Power Control research based on Virtual shipyard ". journal of Zhejiang university .V38, No.12,2004.11:1619-1622; Its technical characteristics is as follows: three-phase rectifier, fast response time, but owing to adopting bang-bang control, brings switching frequency to suddenly change but introduce disturbance and noise, reducing the reliability of system, even make the performance of system worsen.
More than comprehensive, the retrieval of single-phase active power factor corrector prior art is found, one circle control and direct Power Control have the fast advantage of response, but outer voltage limits monocyclic response speed, traditional direct Power Control switching frequency acute variation brings the latent instability of system.
Summary of the invention
For defect of the prior art, the object of this invention is to provide the single-phase power factor correcting device that a kind of direct net side power adopting power circuit, auxiliary circuit and control module to form controls, realize the AC-DC converter of unit input power factor, be applicable to wide load applications, there is the advantages such as circuit is simple, control is convenient simultaneously.
The invention provides the single-phase power factor correcting device that a kind of direct net side power controls, comprise power circuit, auxiliary circuit and control module, wherein: described power circuit completes the power conversion of single-phase AC-DC; Described auxiliary circuit connects described power circuit, completes the instantaneous detection of input voltage, input current, output voltage and the driving to original pwm pulse, and various measuring electric quantity is outputted to described control module; After described control module accepts the various detection electricity of described auxiliary circuit, digital operation and logical process is carried out according to direct Power Control and one circle control principle, and obtain original driving pulse, described power circuit is transported to after overdriving, control the break-make rule of power device, described power circuit is made to complete power factor correction, and the direct voltage of stable output.
Preferably, described power circuit comprises rectification circuit, booster circuit, shunt circuit and bleeder circuit, wherein:
Described rectification circuit comprise be parallel to net side ac capacitor and by first, second, 3rd, the single-phase rectification bridge that 4th diode is formed, the two ends of described ac capacitor are parallel to alternating current net side, first brachium pontis of described single-phase rectification bridge comprises described first of series connection, second diode, second brachium pontis of described single-phase rectification bridge comprises the described 3rd of series connection the, 4th diode, described first, the high-end common cathode of the second brachium pontis is connected to form positive pole, described first, the low side common anode pole of the second brachium pontis is connected to form negative pole, described first, the mid point of the second brachium pontis is connected with the two ends of described ac capacitor,
Described booster circuit comprises boost inductance, oppositely fast recovery diode, chopped power device and electrochemical capacitor, one end of described boost inductance is connected with the described single-phase rectification bridge positive pole in described rectification circuit, the other end is connected with the anode of described reverse fast recovery diode, the collector electrode of described chopped power device, the negative electrode of described reverse fast recovery diode is connected with the positive pole of described electrochemical capacitor and forms direct current output cathode afterwards, and the emission electrode of described chopped power device is connected with the negative pole of described electrochemical capacitor and forms direct current output negative pole afterwards;
Described shunt circuit is a shunt resistance, one end of described shunt resistance is connected with the negative pole of the described single-phase rectification bridge in described rectification circuit, and the other end is connected with the emission electrode of described chopped power device in described booster circuit, the negative pole of described electrochemical capacitor;
Described bleeder circuit comprises middle bleeder circuit and exports bleeder circuit, the second resistance of rectification circuit output end, the 3rd resistance is parallel to after described middle bleeder circuit comprises series connection, one end of described second resistance is connected with the positive pole of the described single-phase rectification bridge in described rectification circuit, the other end is connected with one end of described 3rd resistance, and the described other end of the 3rd resistance is connected with one end of the described shunt resistance in the negative pole of the described single-phase rectification bridge in described rectification circuit, described shunt circuit; The 4th resistance of DC output end, the 5th resistance is parallel to after described output bleeder circuit comprises series connection, described one end of 4th resistance is connected with the negative electrode of the described reverse fast recovery diode in described booster circuit, the positive pole of described electrochemical capacitor, form direct current output cathode, the other end is connected with one end of described 5th resistance, the described other end of the 5th resistance is connected with the emission electrode of described chopped power device in the other end of the described shunt resistance of described shunt circuit, described booster circuit, the negative pole of described electrochemical capacitor, forms direct current output negative pole.
Preferably, described auxiliary circuit comprises input voltage detection circuit, input electric cur-rent measure circuit, output voltage detecting circuit and driving pulse amplifying circuit, wherein:
The input of described input voltage detection circuit is connected with the described middle bleeder circuit mid point in described power circuit, the input of described input electric cur-rent measure circuit is connected with the described shunt resistance one end in described power circuit, the input of described output voltage detecting circuit is connected with the described output bleeder circuit mid point in described power circuit, and the output of described driving pulse amplifying circuit is connected with the gate pole of the described chopped power device in described power circuit.
Preferably, described control module comprises voltage squared and controls outer shroud module and Current Control inner ring module, wherein:
Described voltage squared controls outer shroud module and comprises input voltage effective value computing module, input current effective value computing module, input power mean value calculation module, input power requirements computing module, input power scaling module and voltage squared PI adjustment module, wherein:
The described entrance of input voltage effective value computing module is connected with the output of the described input voltage detection circuit in described auxiliary circuit, exports and is connected with the first entrance of described input power mean value calculation module;
The entrance of described input current effective value computing module is connected with the output of the described input electric cur-rent measure circuit in described auxiliary circuit, exports and is connected with the second entrance of described input power mean value calculation module;
The outlet of described input power mean value calculation module is connected with the first entrance of described input power requirements computing module;
The outlet of described input power requirements computing module is connected with the entrance of described input power scaling module;
The outlet of described input power scaling module is connected with the second entrance of external reset integration module in described one circle control inner ring module, the first entrance of subtraction block respectively;
First entrance of described voltage squared PI adjustment module is connected with the described output voltage detecting circuit output in described auxiliary circuit; Second entrance is given voltage squared, exports and is connected with the second entrance of described input power requirements computing module;
Described one circle control inner ring module comprises pulse generating module, RS trigger module, external reset integration module, comparison module and subtraction block, wherein:
The outlet of described pulse generating module is connected with the first entrance of described RS trigger module;
Second entrance of described RS trigger module is connected with the outlet of described comparison module, and the first outlet is connected with the first entrance of described external reset integration module, and the second outlet is connected with the input of the described driving pulse amplifying circuit in described auxiliary circuit;
The outlet of described external reset integration module is connected with the first entrance of described comparison module;
Second entrance of described comparison module is connected with the outlet of described subtraction block;
Second entrance of described subtraction block is connected with the output of the described input electric cur-rent measure circuit in described auxiliary circuit.
Operation principle of the present invention is the repertoire adopting power circuit, auxiliary circuit and control module to realize the single-phase power factor correcting device that directly net side power controls, described control module is in order to realize the direct net side power control algorithm of single-phase power factor correcting device, concrete:
Described input voltage effective value computing module is responsible for the input voltage instantaneous value obtained according to the described input voltage detection circuit measurement in described auxiliary circuit, adopt the input voltage instantaneous value of method process half power cycle of sliding window, calculate the input voltage effective value that real-time is higher;
Described input current effective value computing module is responsible for the input current instantaneous value obtained according to described input electric cur-rent measure circuit measuring, the i.e. terminal voltage of described shunt resistance, reflect the instantaneous value of the electric current of described boost inductance, adopt the input current instantaneous value of method process half power cycle of sliding window, calculate the input current effective value that real-time is higher;
The input current effective value that the input voltage effective value that described input voltage effective value computing module calculates by described input power mean value calculation module in charge and described input current effective value computing module calculate is multiplied, and obtains the current actual input power that real-time is stronger;
Described voltage squared PI adjustment module is responsible for the VD instantaneous value obtained according to described output voltage detecting circuit measurement, it is asked square, what then the given voltage squared obtained after square is deducted output voltage instantaneous value square obtains the difference of two squares, then proportional integral adjustment (PI) is carried out to the difference of two squares, obtain the controlled quentity controlled variable of control voltage square;
The controlled quentity controlled variable that described input power requirements computing module is responsible for the reflection power output changes in demand amount of current actual input power and the described voltage squared PI adjustment module output described input power mean value calculation module obtained is added, and obtains the overall power requirement that current needs obtain from electrical network;
The overall power requirement that the current needs that described input power requirements computing module obtains obtain from electrical network by described input power scaling module, divided by power base value, obtain per unit value, this per unit value is admitted to described external reset integration module, carry out digital integration, obtain the ramp signal of slope reflection per unit value size, according to power bracket and the per unit value of single-phase active PFC, determine power base value by debugging;
Described pulse generating module is responsible for producing the pulse with carrier synchronization, and for arranging RS trigger module described in rear class, the frequency of this lock-out pulse is the described chopped power devices switch frequency in described power circuit;
Described subtraction block is responsible for the transient current nominal power of described input power scaling module being deducted the output of described input electric cur-rent measure circuit;
Described RS trigger module accepts from the asserts signal of described pulse generating module and the reset signal from described comparison module, produce original PWM triggering signal, deliver to described driving pulse amplifying circuit, and then drive described chopped power device, described RS trigger module exports the complementary signal of original PWM triggering signal simultaneously, the ramp signal that described external reset integration module produces is resetted, obtain saw-toothed carrier, this saw-toothed carrier is admitted to described comparison module, compare with the output of described subtraction block again, produce the reset signal of described RS trigger module.
Compared with prior art, the present invention has following beneficial effect:
1, direct Power Control organically combines with one circle control by the present invention, the control module of design single-phase active PFC, utilize and directly control the fast feature design voltage of power dynamic response square control outer shroud, adapt to load variations fast, but do not adopt bang-bang control, switching frequency is constant, utilize one circle control fast response time and the strong advantage of interference rejection ability simultaneously, design con-trol inner ring, improves dynamic characteristic and improves antijamming capability;
2, the present invention adopts direct Power Control outer shroud, and also help the power following feature realizing single-phase active PFC, when heavier loads, output dc voltage on average declines, otherwise increases, and result is conducive to improving the design difficulty of boost inductance in power circuit;
3, the design of control module of the present invention is more flexible and efficient, and dynamic and static state performance is promoted, and can adapt to the change at random of load, and no matter heavy duty or underloading, can obtain higher power factor correction effect.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the schematic diagram of the single-phase power factor correcting device that direct net side of the present invention power controls.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
As shown in Figure 1, the single-phase power factor correcting device that the present embodiment provides a kind of direct net side power to control, comprises power circuit 1, auxiliary circuit 2 and control module 3, wherein: described power circuit 1 completes the power conversion of single-phase AC-DC; Described auxiliary circuit 2 connects described power circuit 1, complete rectified voltage (i.e. input voltage), inductive current (namely reflecting input current), the instantaneous detection of output voltage and the driving to original pwm pulse, and various detection electricity is outputted to described control module 3; After described control module 3 accepts the various detection electricity of described auxiliary circuit 2, digital operation and logical process is carried out according to Direct Power and one circle control principle, and obtain final original driving pulse, described power circuit 1 is transported to after overdriving, control the break-make rule of power device, described power circuit 1 is made to complete power factor correction, and the direct voltage of stable output.
Described in the present embodiment, power circuit 1 comprises rectification circuit, booster circuit, shunt circuit and bleeder circuit, wherein:
Described rectification circuit comprise be parallel to net side ac capacitor C1 and by first, second, 3rd, 4th diode (D1, D2, D3, D4) the single-phase rectification bridge B1 formed, the two ends of described ac capacitor C1 are parallel to alternating current net side, first brachium pontis of described single-phase rectification bridge B1 comprises the described first diode D1 of series connection and described second diode D2, second brachium pontis of described single-phase rectification bridge B1 comprises the described 3rd diode D3 of series connection and described 4th diode D4, described first, the high-end common cathode of the second brachium pontis is connected to form positive pole, described first, the low side common anode pole of the second brachium pontis is connected to form negative pole, described first, the mid point of the second brachium pontis is connected with the two ends of described ac capacitor C1,
Described booster circuit comprises boost inductance L1, reverse fast recovery diode FRD1, chopped power device S1 and electrochemical capacitor E1, one end of described boost inductance L1 is connected with the described single-phase rectification bridge B1 positive pole in described rectification circuit, the anode of the other end and described reverse fast recovery diode FRD1, the collector electrode of described chopped power device S1 is connected, the negative electrode of described reverse fast recovery diode FRD1 is connected with the positive pole of described electrochemical capacitor E1 and forms direct current output cathode afterwards, the emission electrode of described chopped power device S1 is connected with the negative pole of described electrochemical capacitor E1 and forms direct current output negative pole afterwards,
Described shunt circuit is a shunt resistance R1, one end of described shunt resistance R1 is connected with the negative pole of the described single-phase rectification bridge B1 in described rectification circuit, and the other end is connected with the emission electrode of described chopped power device S1 in described booster circuit, the negative pole of described electrochemical capacitor E1;
Described bleeder circuit comprises middle bleeder circuit and exports bleeder circuit, the second resistance R2 of rectification circuit output end, the 3rd resistance R3 is parallel to after described middle bleeder circuit comprises series connection, one end of described second resistance R2 is connected with the positive pole of the described single-phase rectification bridge B1 in described rectification circuit, the other end is connected with one end of described 3rd resistance R3, and the other end of described 3rd resistance R3 is connected with the one end of the described shunt resistance R1 in the negative pole of the described single-phase rectification bridge B1 in described rectification circuit, described shunt circuit, the 4th resistance R4 of DC output end is parallel to after described output bleeder circuit comprises series connection, 5th resistance R5, the negative electrode of the described reverse fast recovery diode FRD1 in one end of described 4th resistance R4 and described booster circuit, the positive pole of described electrochemical capacitor E1 is connected, form direct current output cathode, the other end is connected with one end of described 5th resistance R5, the other end of the other end of described 5th resistance R5 and the described shunt resistance R1 of described shunt circuit, the emission electrode of the described chopped power device S1 in described booster circuit, the negative pole of described electrochemical capacitor E1 is connected, form direct current output negative pole.
Auxiliary circuit 2 described in the present embodiment comprises input voltage detection circuit M1, input electric cur-rent measure circuit M2, output voltage detecting circuit M3 and driving pulse amplifying circuit M4, wherein:
The input of described input voltage detection circuit M1 is connected with the described middle bleeder circuit mid point in described power circuit 1, the input of described input electric cur-rent measure circuit M2 is connected with the described shunt resistance R1 one end in described power circuit 1, the input of described output voltage detecting circuit M3 is connected with the described output bleeder circuit mid point in described power circuit 1, and the output of described driving pulse amplifying circuit M4 is connected with the gate pole of the described chopped power device S1 in described power circuit 1.
Control module 3 described in the present embodiment has comprised 11 digital modules of control algolithm, is divided into voltage squared to control outer shroud module and Current Control inner ring module, wherein:
Described voltage squared controls outer shroud module and comprises six digital modules, i.e. input voltage effective value computing module U1, input current effective value computing module U2, input power mean value calculation module U3, input power requirements computing module U4, input power scaling module U6 and voltage squared PI adjustment module U5, wherein:
The described entrance of input voltage effective value computing module U1 is connected with the output of the described input voltage detection circuit M1 in described auxiliary circuit 2, exports and is connected with first entrance of described input power mean value calculation module U3;
The entrance of described input current effective value computing module U2 is connected with the output of the described input electric cur-rent measure circuit M2 in described auxiliary circuit 2, exports and is connected with second entrance of described input power mean value calculation module U3;
The outlet of described input power mean value calculation module U3 is connected with first entrance of described input power requirements computing module U4;
The outlet of described input power requirements computing module U4 is connected with the entrance of described input power scaling module U6;
The outlet of described input power scaling module U6 is connected with second entrance of external reset integration module U9 in described one circle control inner ring module, first entrance of subtraction block U11 respectively;
First entrance of described voltage squared PI adjustment module U5 is connected with the described output voltage detecting circuit M3 output in described auxiliary circuit 2; Second entrance is given voltage squared, exports and is connected with second entrance of described input power requirements computing module U4;
Described one circle control inner ring module comprises five digital modules, i.e. pulse generating module U7, RS trigger module U8, external reset integration module U9, comparison module U10 and subtraction block U11, wherein:
The outlet of described pulse generating module U7 is connected with first entrance of described RS trigger module U8;
Second entrance of described RS trigger module U8 is connected with the outlet of described comparison module U10, first outlet is connected with first entrance of described external reset integration module U9, and the second outlet is connected with the input of the described driving pulse amplifying circuit M4 in described auxiliary circuit 2;
Described external reset integration module U9 outlet is connected with first entrance of described comparison module U10;
Second entrance of described comparison module U10 is connected with the outlet of described subtraction block U11;
Second entrance of described subtraction block U11 is connected with the output of the described input electric cur-rent measure circuit M2 in described auxiliary circuit 2.
The present embodiment adopts described power circuit 1, described auxiliary circuit 2 and described control module 3 to realize directly netting the repertoire of the single-phase power factor correcting device that side power controls, and wherein, described power circuit 1 is the power circuit of traditional single-phase active PFC; Described auxiliary circuit 2 also comprises the various testing circuit of necessary electricity and the drive circuit of power device in conventional power circuit, and difference have employed directly towards netting the control algolithm of side power to realize the function of single-phase active PFC; Described control module 3 is core, is used for realizing the direct net side power control algorithm of single-phase power factor correcting device, concrete:
Described input voltage effective value computing module U1 is responsible for the input voltage instantaneous value obtained according to the described input voltage detection circuit M1 measurement in described auxiliary circuit 2, adopt the input voltage instantaneous value of method process half power cycle of sliding window, calculate the input voltage effective value that real-time is higher;
Described input current effective value computing module U2 is responsible for the input current instantaneous value obtained according to the described input electric cur-rent measure circuit M2 measurement in described auxiliary circuit 2, the i.e. terminal voltage of described shunt resistance R1, reflect the instantaneous value of the electric current of described boost inductance L1, adopt the input current instantaneous value of method process half power cycle of sliding window, calculate the input current effective value that real-time is higher;
The input voltage effective value that described input power mean value calculation module U3 is responsible for described input voltage effective value computing module U1 to calculate is multiplied with the input current effective value that described input current effective value computing module U2 calculates, and obtains the current actual input power that real-time is stronger;
Described voltage squared PI adjustment module U5 is responsible for the VD instantaneous value obtained according to the described output voltage detecting circuit M3 measurement in described auxiliary circuit 2, it is asked square, what then given voltage squared (the actual given voltage squared for obtaining after square) is deducted output voltage instantaneous value square obtains the difference of two squares, then proportional integral adjustment (PI) is carried out to the difference of two squares, obtain the controlled quentity controlled variable of control voltage square, this controlled quentity controlled variable is the controlled quentity controlled variable of reflection power output changes in demand amount, is also maintain the constant controlled quentity controlled variable of output voltage stabilization simultaneously;
The controlled quentity controlled variable that described input power requirements computing module U4 is responsible for the reflection power output changes in demand amount of current actual input power and the described voltage squared PI adjustment module U5 output obtained by described input power mean value calculation module U3 is added, obtain the overall power requirement that current needs obtain from electrical network, i.e. DC quantity;
The overall power requirement that the current needs that described input power requirements computing module U4 obtains obtain from electrical network by described input power scaling module U6, divided by power base value, obtain per unit value, this per unit value is admitted to described external reset integration module U9, carry out digital integration, obtain the ramp signal of slope reflection per unit value size, according to power bracket and the per unit value of single-phase active PFC, determine power base value by debugging;
Described pulse generating module U7 is responsible for producing the pulse with carrier synchronization, for arranging RS trigger module U8 described in rear class, [S] represents that set end has the priority higher than reset terminal, and the frequency of this lock-out pulse is the switching frequency of the described chopped power device S1 in described power circuit 1;
Described subtraction block U11 is responsible for the transient current nominal power of described input power scaling module U6 being deducted described input electric cur-rent measure circuit M2 output;
Described RS trigger module U8 accepts from the asserts signal of described pulse generating module U7 and the reset signal from described comparison module U10, produce original PWM triggering signal, deliver to the described driving pulse amplifying circuit M4 in described auxiliary circuit 2, and then drive the described chopped power device S1 in described power circuit 1; Described RS trigger module U8 exports the complementary signal of original PWM triggering signal simultaneously, the ramp signal that described external reset integration module U9 produces is resetted, obtain saw-toothed carrier, this saw-toothed carrier is admitted to described comparison module U10, compare with the output of described subtraction block U11 again, produce the reset signal of described RS trigger module U8.
In the present embodiment: AC-input voltage wide region, 85VAC ~ 264VAC, power frequency, nominal input voltage 220VAC, specified output dc voltage mean value 385VDC, ripple voltage peak-to-peak value is 10V, rated output power 3.5kW, and power base value is 3.5kW.
Switching frequency: 35kHz;
Ac capacitor C1:275V, 1.0 μ F ~ 2.2 μ F, plug-in unit;
Single-phase rectification bridge B1(D1 ~ D4): 600V, 25A/100 ° of C, flat bridge, plug-in unit;
Boost inductance L1:350 μ H, plug-in unit;
Chopped power device S1:600V, 50A/100 ° of C;
Reverse fast recovery diode FRD1:600V, 35A/100 ° C;
Electrochemical capacitor E1:4x680 μ F, 400V;
Shunt resistance R1:15m Ω, 2W;
Divider resistance R2:150k Ω, 1/2W, plug-in unit;
Divider resistance R3:1k Ω, 1/2W, plug-in unit;
Divider resistance R4:200k Ω, 1/2W, plug-in unit;
Divider resistance R5:1k Ω, 1/2W, plug-in unit;
Reference voltage square U
2 ref: 2.0V
Auxiliary circuit: conventional filter circuit and drive circuit;
Digital signal processor: for control module, selects the TMS320F28355 supporting floating-point operation.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (5)
1. directly net the single-phase power factor correcting device that side power controls, it is characterized in that, comprise power circuit, auxiliary circuit and control module, wherein: described power circuit completes the power conversion of single-phase AC-DC; Described auxiliary circuit connects described power circuit, completes the instantaneous detection of input voltage, input current, output voltage and the driving to original PWM triggering signal, and various measuring electric quantity is outputted to described control module; After described control module accepts the various detection electricity of described auxiliary circuit, digital operation and logical process is carried out according to direct Power Control and one circle control principle, and obtain original driving pulse, described power circuit is transported to after overdriving, control the break-make rule of power device, described power circuit is made to complete power factor correction, and the direct voltage of stable output;
Described control module comprises voltage squared and controls outer shroud module and Current Control inner ring module, and described voltage squared controls outer shroud module and comprises input voltage effective value computing module, input current effective value computing module, input power mean value calculation module, input power requirements computing module, input power scaling module and voltage squared PI adjustment module; Described Current Control inner ring module comprises pulse generating module, RS trigger module, external reset integration module, comparison module and subtraction block; Wherein:
Described input voltage effective value computing module is responsible for the input voltage instantaneous value obtained according to the input voltage detection circuit measurement in described auxiliary circuit, adopt the input voltage instantaneous value of method process half power cycle of sliding window, calculate the input voltage effective value that real-time is higher;
Described input current effective value computing module is responsible for the input current instantaneous value obtained according to the input electric cur-rent measure circuit measuring in described auxiliary circuit, the terminal voltage of the shunt resistance namely in described power circuit, reflect the instantaneous value of the electric current of the boost inductance in described power circuit, adopt the input current instantaneous value of method process half power cycle of sliding window, calculate the input current effective value that real-time is higher;
The input current effective value that the input voltage effective value that described input voltage effective value computing module calculates by described input power mean value calculation module in charge and described input current effective value computing module calculate is multiplied, and obtains the current actual input power that real-time is stronger;
Described voltage squared PI adjustment module is responsible for the VD instantaneous value obtained according to the output voltage detecting circuit measurement in described auxiliary circuit, it is asked square, what then the given voltage squared obtained after square is deducted output voltage instantaneous value square obtains the difference of two squares, then proportional integral adjustment is carried out to the difference of two squares, obtain the controlled quentity controlled variable of control voltage square;
The controlled quentity controlled variable that described input power requirements computing module is responsible for the reflection power output changes in demand amount of current actual input power and the described voltage squared PI adjustment module output described input power mean value calculation module obtained is added, and obtains the overall power requirement that current needs obtain from electrical network;
The overall power requirement that the current needs that described input power requirements computing module obtains obtain from electrical network by described input power scaling module, divided by power base value, obtain per unit value, this per unit value is admitted to described external reset integration module, carry out digital integration, obtain the ramp signal of slope reflection per unit value size, according to power bracket and the per unit value of single-phase active PFC, determine power base value by debugging;
Described pulse generating module is responsible for producing the pulse with carrier synchronization, and for arranging RS trigger module described in rear class, the frequency of this synchronous pulse is the chopped power devices switch frequency in described power circuit;
Described subtraction block is responsible for the transient current per unit value of described input power scaling module being deducted the output of described input electric cur-rent measure circuit;
Described RS trigger module accepts from the asserts signal of described pulse generating module and the reset signal from described comparison module, produce original PWM triggering signal, deliver to the driving pulse amplifying circuit in described auxiliary circuit, and then drive described chopped power device, described RS trigger module exports the complementary signal of original PWM triggering signal simultaneously, the ramp signal that described external reset integration module produces is resetted, obtain saw-toothed carrier, this saw-toothed carrier is admitted to described comparison module, compare with the output of described subtraction block again, produce the reset signal of described RS trigger module.
2. the single-phase power factor correcting device of a kind of direct net side according to claim 1 power control, it is characterized in that, described power circuit comprises rectification circuit, booster circuit, shunt circuit and bleeder circuit, wherein:
Described rectification circuit comprise be parallel to net side ac capacitor and by first, second, 3rd, the single-phase rectification bridge that 4th diode is formed, the two ends of described ac capacitor are parallel to alternating current net side, first brachium pontis of described single-phase rectification bridge comprises described first of series connection, second diode, second brachium pontis of described single-phase rectification bridge comprises the described 3rd of series connection the, 4th diode, the high-end common cathode of described first brachium pontis and described second brachium pontis is connected to form positive pole, the low side common anode pole of described first brachium pontis and described second brachium pontis is connected to form negative pole, described first brachium pontis is connected with the two ends of described ac capacitor with the mid point of described second brachium pontis,
Described booster circuit comprises boost inductance, oppositely fast recovery diode, chopped power device and electrochemical capacitor, one end of described boost inductance is connected with the described single-phase rectification bridge positive pole in described rectification circuit, the other end is connected with the anode of described reverse fast recovery diode, the collector electrode of described chopped power device, the negative electrode of described reverse fast recovery diode is connected with the positive pole of described electrochemical capacitor and forms direct current output cathode afterwards, and the emission electrode of described chopped power device is connected with the negative pole of described electrochemical capacitor and forms direct current output negative pole afterwards;
Described shunt circuit is a shunt resistance, one end of described shunt resistance is connected with the negative pole of the described single-phase rectification bridge in described rectification circuit, and the other end is connected with the emission electrode of described chopped power device in described booster circuit, the negative pole of described electrochemical capacitor;
Described bleeder circuit comprises middle bleeder circuit and exports bleeder circuit, the second resistance of rectification circuit output end, the 3rd resistance is parallel to after described middle bleeder circuit comprises series connection, one end of described second resistance is connected with the positive pole of the described single-phase rectification bridge in described rectification circuit, the other end is connected with one end of described 3rd resistance, and the described other end of the 3rd resistance is connected with one end of the described shunt resistance in the negative pole of the described single-phase rectification bridge in described rectification circuit, described shunt circuit; The 4th resistance of DC output end, the 5th resistance is parallel to after described output bleeder circuit comprises series connection, described one end of 4th resistance is connected with the negative electrode of the described reverse fast recovery diode in described booster circuit, the positive pole of described electrochemical capacitor, form direct current output cathode, the other end is connected with one end of described 5th resistance, the described other end of the 5th resistance is connected with the emission electrode of described chopped power device in the other end of the described shunt resistance of described shunt circuit, described booster circuit, the negative pole of described electrochemical capacitor, forms direct current output negative pole.
3. the single-phase power factor correcting device of a kind of direct net side according to claim 2 power control, it is characterized in that, described auxiliary circuit comprises input voltage detection circuit, input electric cur-rent measure circuit, output voltage detecting circuit and driving pulse amplifying circuit, wherein:
The input of described input voltage detection circuit is connected with the described middle bleeder circuit mid point in described power circuit, the input of described input electric cur-rent measure circuit is connected with the described shunt resistance one end in described power circuit, the input of described output voltage detecting circuit is connected with the described output bleeder circuit mid point in described power circuit, and the output of described driving pulse amplifying circuit is connected with the gate pole of the described chopped power device in described power circuit.
4. the single-phase power factor correcting device that a kind of direct net side power according to any one of claim 1-3 controls, it is characterized in that, described voltage squared controls outer shroud module and comprises input voltage effective value computing module, input current effective value computing module, input power mean value calculation module, input power requirements computing module, input power scaling module and voltage squared PI adjustment module, wherein:
The described entrance of input voltage effective value computing module is connected with the output of the described input voltage detection circuit in described auxiliary circuit, exports and is connected with the first entrance of described input power mean value calculation module;
The entrance of described input current effective value computing module is connected with the output of the described input electric cur-rent measure circuit in described auxiliary circuit, exports and is connected with the second entrance of described input power mean value calculation module;
The outlet of described input power mean value calculation module is connected with the first entrance of described input power requirements computing module;
The outlet of described input power requirements computing module is connected with the entrance of described input power scaling module;
The outlet of described input power scaling module is connected with the second entrance of external reset integration module in described Current Control inner ring module, the first entrance of subtraction block respectively;
First entrance of described voltage squared PI adjustment module is connected with the described output voltage detecting circuit output in described auxiliary circuit; Second entrance is given voltage squared, exports and is connected with the second entrance of described input power requirements computing module.
5. the single-phase power factor correcting device that a kind of direct net side power according to any one of claim 1-3 controls, it is characterized in that, described Current Control inner ring module comprises pulse generating module, RS trigger module, external reset integration module, comparison module and subtraction block, wherein:
The outlet of described pulse generating module is connected with the first entrance of described RS trigger module;
Second entrance of described RS trigger module is connected with the outlet of described comparison module, and the first outlet is connected with the first entrance of described external reset integration module, and the second outlet is connected with the input of the described driving pulse amplifying circuit in described auxiliary circuit;
The outlet of described external reset integration module is connected with the first entrance of described comparison module;
Second entrance of described comparison module is connected with the outlet of described subtraction block;
Second entrance of described subtraction block is connected with the output of the input electric cur-rent measure circuit in described auxiliary circuit.
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| CN103746572B (en) * | 2014-01-03 | 2016-08-17 | 上海交通大学 | Single-phase AC-DC converters energy storage control system |
| CN104052073B (en) * | 2014-07-10 | 2017-02-01 | 南京南瑞继保电气有限公司 | Line power control method and system for unified power flow controller |
| CN104578730B (en) * | 2015-01-26 | 2017-11-10 | 湖南城市学院 | Harmonic suppression apparatus |
| CN105939102A (en) * | 2016-06-29 | 2016-09-14 | 儒竞艾默生环境优化技术（上海）有限公司 | Equal duty ratio power factor correction method and system and electronic equipment |
| CN107612387B (en) * | 2017-09-13 | 2019-12-27 | 上海交通大学 | Single-phase AC-DC conversion circuit with network flow pure sine drive pulse frequency modulation and width modulation |
| CN109245516B (en) * | 2018-09-20 | 2019-11-29 | 北京精密机电控制设备研究所 | A kind of active PFC numerical control device |
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