CN103326556A - Single-phase AC-DC conversion circuit of directional power - Google Patents
Single-phase AC-DC conversion circuit of directional power Download PDFInfo
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- CN103326556A CN103326556A CN201310178941XA CN201310178941A CN103326556A CN 103326556 A CN103326556 A CN 103326556A CN 201310178941X A CN201310178941X A CN 201310178941XA CN 201310178941 A CN201310178941 A CN 201310178941A CN 103326556 A CN103326556 A CN 103326556A
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Abstract
The invention provides a single-phase AC-DC conversion circuit of directional power. The single-phase AC-DC conversion circuit of the directional power comprises a power circuit, an auxiliary circuit and a control module. The power circuit is used for completing power conversion of a single-phase AC-DC. The auxiliary circuit is used for completing instantaneous detection of the input voltage, the input current and the output voltage, completing driving of an original PWM pulse, and outputting various detection values to the control module. After the control module receives the various detection values of the auxiliary circuit, the control module conducts digit arithmetic and logic processing on the basis of the principles of direct power control and double-loop control, finally, an original driving pulse is obtained, the original driving pulse is output to the power circuit after driving, on-off rules of a power device is controlled so as to enable the power circuit to complete correction of power factors, and the stable direct-current voltage is output. The single-phase AC-DC conversion circuit of the directional power achieves the single-phase AC-DC conversion of the network side unit power factors, and the single-phase AC-DC conversion circuit of the directional power has the advantages of being high in response speed, strong in anti-jamming capability and suitable for changes of loads within the wider range, and has load following features.
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 a kind of single-phase AC-DC translation circuit of directive overrurrent relay.
Background technology
In order to improve the net side power factor of the Single-phase AC-DC converters that adopts rectifier bridge, reduce the harm of harmonic current, reduce harmonic current and disturb, make its relevant criterion that meets harmonic current, need to adopt single-phase active power factor correction (PFC) technology.The single-phase active power factor correction technology has the various control strategy, and the two closed-loop controls as traditional obtain good calibration result.Adopt the single-phase active PFC of two closed-loop controls, power factor correction is effective, but dynamic response is slow, and robustness is relatively poor.On principle, two closed-loop controls need to be adopted outer voltage at a slow speed, stablize output dc voltage with this.The conventional voltage outer shroud generally adopts voltage error amplifier, and does not adopt the PID adjuster.The inertia of voltage error amplifier is larger, has affected the dynamic responding speed of two closed-loop controls, the application scenario that inapplicable Fast Load changes.
Directive overrurrent relay control is a kind of variation of according to demand power, carry out bang-bang control, in the converters field of the FACTS categories such as Three-Phase PWM Rectifier, three-phase active filter and three-way tide current controller, obtained widely research, had and respond fast advantage.In single-phase active PFC field, the example that does not still have this respect to use.
Pass through the retrieval to the single-phase active power factor corrector prior art that adopts two loop control theories, 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 the UC3854BN analog controller, voltage error amplifier is as outer voltage, and response speed is affected.
[2] He Zhiyuan and Wei Wei. " based on the PWM rectifier directive overrurrent relay control research of virtual magnetic linkage ". 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, bring the switching frequency sudden change but introducing disturbance and noise, the reliability of reduction system, even so that the performance of system worsen.
More than comprehensive, retrieval to single-phase active power factor corrector prior art is found, directive overrurrent relay control has advantages of that response is fast, and traditional directive overrurrent relay control switch frequency acute variation is brought the latent instability problem of system, and outer voltage has limited the response speed of traditional double closed-loop control.
Summary of the invention
For defective of the prior art, the purpose of this invention is to provide a kind of single-phase AC-DC translation circuit of directive overrurrent relay, realize the AC-DC converter of unit input power factor, be fit to wide load applications, have simultaneously the advantages such as circuit is simple, control is convenient.
The invention provides a kind of single-phase AC-DC translation circuit of directive overrurrent relay, comprise power circuit, auxiliary circuit and control module, wherein: described power circuit is in order to finish the power conversion of single-phase AC-DC; Described auxiliary circuit is in order to finishing to the instantaneous detection of input voltage, input current, output voltage with to the driving of original pwm pulse, and various detected values are exported to described control module; After described control module is accepted the various detected values of described auxiliary circuit, carry out digital operation and logical process according to Direct Power and dicyclo control principle, and obtain final original driving pulse, after overdriving, be transported to described power circuit, the break-make rule of power ratio control device, so that described power circuit is finished 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 comprises the ac capacitor that is parallel to the net side and by first, second, the 3rd, the single-phase rectification bridge that the 4th diode consists of, the two ends of described ac capacitor are parallel to alternating current net side, the first brachium pontis of described single-phase rectification bridge comprises the first diode and second diode of series connection, the second brachium pontis of described single-phase rectification bridge comprises the 3rd diode and the 4th diode of series connection, described first, the high-end common cathode of the second brachium pontis links to each other and forms positive pole, described first, the low side common anode of the second brachium pontis extremely links to each other and forms negative pole, described first, the mid point of the second brachium pontis links to each other with the two ends of described ac capacitor;
Described booster circuit comprises boost inductance, reverse fast recovery diode, copped wave power device and electrochemical capacitor, one end of described boost inductance links to each other with the described single-phase rectification bridge in the described rectification circuit is anodal, the other end links to each other with the anode of described reverse fast recovery diode, the collector electrode of described copped wave power device, form the direct current output cathode after the negative electrode of described reverse fast recovery diode links to each other with the positive pole of described electrochemical capacitor, form the direct current output negative pole after the emission electrode of described copped wave power device links to each other with the negative pole of described electrochemical capacitor;
Described shunt circuit is a shunt resistance, the negative pole of the described single-phase rectification bridge in one end of described shunt resistance and the described rectification circuit links to each other, and the emission electrode of the described copped wave power device in the other end and the described booster circuit, the negative pole of described electrochemical capacitor link to each other;
Bleeder circuit and output bleeder circuit in the middle of described bleeder circuit comprises, bleeder circuit comprises the second resistance, the 3rd resistance that is parallel to rectification circuit output end after the series connection in the middle of described, the positive pole of the described single-phase rectification bridge in one end of described the second resistance and the described rectification circuit links to each other, the other end links to each other with an end of described the 3rd resistance, and an end of the negative pole of the described single-phase rectification bridge in the other end of described the 3rd resistance and the described rectification circuit, the described shunt resistance in the described shunt circuit links to each other; Described output bleeder circuit comprises the 4th resistance, the 5th resistance that is parallel to dc output end after the series connection, one end of described the 4th resistance links to each other with described direct current output cathode, the other end links to each other with an end of described the 5th resistance, the other end of described the 5th resistance links to each other with described direct current output negative pole, and namely the negative pole of the other end of described shunt resistance, the emission electrode of described copped wave power device, described electrochemical capacitor links to each other.
Preferably, described auxiliary circuit comprises input voltage detection circuit, input current testing circuit, output voltage detecting circuit and driving pulse amplifying circuit, wherein:
The bleeder circuit mid point links to each other in the middle of described in the input of described input voltage detection circuit and the described power circuit, described input current testing circuit links to each other with described shunt resistance one end in the described power circuit, described output voltage detecting circuit links to each other with described output bleeder circuit mid point in the described power circuit, and the gate pole of the described copped wave power device in the output of described driving pulse amplifying circuit and the described power circuit links to each other.
Preferably, described control module comprises eight digital modules finishing control algolithm, is divided into ring module in voltage squared control outer shroud module and the Current Control, wherein:
Described voltage squared control outer shroud module comprises a digital module, i.e. voltage squared PI adjustment module, and the first entrance of described voltage squared PI adjustment module links to each other with described output voltage detecting circuit output in the described auxiliary circuit; The second entrance is given voltage squared, and outlet links to each other with the second entrance of the input power requirements computing module of ring in the module in the described Current Control.
The ring module comprises seven digital modules in the described Current Control, be that input voltage effective value computing module, input current effective value computing module, input power mean value calculation module, input power requirements computing module, input current reference value computing module, current PI adjustment module and driving pulse form module, wherein:
The entrance of described input voltage effective value computing module links to each other with described input voltage detection circuit output in the described auxiliary circuit, and outlet links to each other with the first entrance of described input power mean value calculation module;
The entrance of described input current effective value computing module links to each other with described input current testing circuit output in the described auxiliary circuit, and outlet links to each other with the second entrance of described input power mean value calculation module;
The outlet of described input power mean value calculation module links to each other with the first entrance of described input power requirements computing module;
The outlet of described input power requirements computing module links to each other with the first entrance of described input current reference value computing module;
The second entrance of described input current reference value computing module links to each other with described input voltage detection circuit output in the described auxiliary circuit, and outlet links to each other with the second entrance of described current PI adjustment module;
The first entrance of described current PI adjustment module links to each other with described input current testing circuit output in the described auxiliary circuit, and outlet links to each other with the entrance that described driving pulse forms module;
The input of the described driving pulse amplifying circuit in the outlet that described driving pulse forms module and the described auxiliary circuit links to each other.
Operation principle of the present invention is to adopt power circuit, auxiliary circuit and control module to realize the repertoire of the single-phase AC-DC translation circuit of directive overrurrent relay, described control module is in order to realizing the direct net side power control algorithm of single-phase power factor correcting device, and is concrete:
Described voltage squared PI adjustment module belongs to voltage squared control outer shroud module, the responsible VD instantaneous value that measures according to described output voltage detecting circuit, it is asked square, then given voltage squared is deducted the difference of two squares that square obtains of output voltage instantaneous value, then the difference of two squares being carried out proportional integral regulates, the controlled quentity controlled variable of controlled voltage squared, the controlled quentity controlled variable of this controlled quentity controlled variable reflection power output changes in demand amount also is to keep the constant controlled quentity controlled variable of output voltage stabilization simultaneously;
Described input voltage effective value computing module is responsible for the input voltage instantaneous value that measures according to described input voltage detection circuit, the method of employing sliding window is processed the input voltage instantaneous value of half power cycle, calculates the higher input voltage effective value of real-time;
Described input current effective value computing module is responsible for the input current instantaneous value that measures according to described input current testing circuit, it is the terminal voltage of described shunt resistance, the instantaneous value that reflects the electric current of described boost inductance, the method of employing sliding window is processed the input current instantaneous value of half power cycle, calculates the higher input current effective value of real-time;
Described input power mean value calculation module is responsible for the input current effective value that input voltage effective value that described input voltage effective value computing module is calculated and described input current effective value computing module calculate and is multiplied each other, and obtains the stronger current actual input power of real-time;
Described input power requirements computing module is responsible for the controlled quentity controlled variable addition of the reflection power output changes in demand amount of current actual input power that described input power mean value calculation module is obtained and the output of described voltage squared PI adjustment module, obtain the current overall power requirement that need to obtain from electrical network, i.e. DC quantity;
Described input current reference value computing module is with the above-mentioned current overall power requirement that need to obtain from electrical network, divided by the input voltage instantaneous value, obtain the instantaneous value of input current, i.e. the reference current of current inner loop, this reference current is admitted to described current PI adjustment module;
Described current PI adjustment module deducts the input current detected value with above-mentioned reference current, obtains the deviation electric current, carries out proportional integral again and regulates, and obtains the final similar duty ratio function of sine wave, sends into described driving pulse and forms module;
Described driving pulse forms module and is responsible for duty ratio function obtained above is converted to original pwm signal, and this signal is sent into the described driving pulse amplifying circuit in the described auxiliary circuit;
The pwm pulse that described driving pulse amplifying circuit output has driving force is sent into described power circuit, drives the break-make operation of described copped wave power device, finally finishes the function of PFC.
Compared with prior art, the present invention has following beneficial effect:
The present invention organically combines directive overrurrent relay control with dicyclo control, the control module of design single-phase active PFC is utilized the fast characteristics design voltage of direct power ratio control dynamic response square control outer shroud module, adapts to fast load variations, but do not adopt bang-bang control, switching frequency is constant; Adopt directive overrurrent relay control outer shroud, also help the power following characteristic that realizes single-phase active PFC, output dc voltage on average descends when load is heavier, otherwise increases, and the result is conducive to improve the design difficulty of boost inductance in the power circuit; The design of control module 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.
Description of drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the schematic diagram of the single-phase AC-DC translation circuit of directive overrurrent relay of the present invention.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.Following examples will help those skilled in the art further to understand the present invention, but not limit in any form the present invention.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
As shown in Figure 1, the present embodiment provides a kind of single-phase AC-DC translation circuit of directive overrurrent relay, comprise power circuit 1, auxiliary circuit 2 and control module 3, wherein: described power circuit 1 is finished the power conversion of single-phase AC-DC, described auxiliary circuit 2 is finished input voltage, input current, the instantaneous detection of output voltage and to the driving of original pwm pulse, after described control module 3 is accepted the various detection electric weight of described auxiliary circuit 2, carry out digital operation and logical process according to directive overrurrent relay control and two loop control theory, and obtain original driving pulse, finish power factor correction by described power circuit 1 at last, and the direct voltage of stable output.
The described power circuit 1 of the present embodiment comprises rectification circuit, booster circuit, shunt circuit and bleeder circuit,
Described rectification circuit comprises the ac capacitor C1 that is parallel to the net side and by the first diode D1, the second diode D2, the 3rd diode D3, the single-phase rectification bridge B1 that the 4th diode D4 consists of, wherein: the two ends of described ac capacitor C1 are parallel to alternating current net side, the first brachium pontis of described single-phase rectification bridge B1 comprises the first diode D1 and the second diode D2 of series connection, the second brachium pontis of described the first single-phase rectification bridge B1 comprises the 3rd diode D3 and the 4th diode D4 of series connection, described first, the high-end common cathode of the second brachium pontis links to each other and forms positive pole, described first, the low side common anode of the second brachium pontis extremely links to each other and forms negative pole, described first, the mid point of the second brachium pontis links to each other with the two ends of described ac capacitor C1;
Described booster circuit comprises boost inductance L1, reverse fast recovery diode FRD1, copped wave power device S1 and electrochemical capacitor E1, wherein: the end of described boost inductance L1 links to each other with described single-phase rectification bridge B1 is anodal, the anode of the other end and described reverse fast recovery diode FRD1, the collector electrode of described copped wave power device S1 links to each other, form the direct current output cathode after the negative electrode of described reverse fast recovery diode FRD1 links to each other with the positive pole of described electrochemical capacitor E1, form the direct current output negative pole after the emission electrode of described copped wave power device S1 links to each other with the negative pole of described electrochemical capacitor E1;
Described shunt circuit comprises a shunt resistance R1, and the end of described shunt resistance R1 links to each other with the negative pole of described single-phase rectification bridge B1, and the other end links to each other with the emission electrode of described copped wave power device S1, the negative pole of described electrochemical capacitor E1;
Bleeder circuit and output bleeder circuit in the middle of described bleeder circuit comprises, wherein: bleeder circuit comprises the second resistance R 2, the 3rd resistance R 3 that is parallel to rectification circuit output end after the series connection in the middle of described, one end of described the second resistance R 2 links to each other with the positive pole of described single-phase rectification bridge B1, the other end links to each other with an end of described the 3rd resistance R 3, and the other end of described the 3rd resistance R 3 links to each other with the negative pole of described single-phase rectification bridge B1, the end of described shunt resistance R1; Described output bleeder circuit comprises the 4th resistance R 4, the 5th resistance R 5 that is parallel to dc output end after the series connection, R4 one end of described the 4th resistance links to each other with the positive pole of described single-phase rectification bridge B1, the other end links to each other with an end of described the 5th resistance R 5, and the other end of described the 5th resistance R 5 links to each other with the emitter of the other end of described shunt resistance R1, described copped wave power device S1, the negative pole of described electrochemical capacitor E1;
Preferably, described auxiliary circuit 2 comprises input voltage detection circuit P1, input current testing circuit P2, output voltage detecting circuit P3 and driving pulse amplifying circuit P4, wherein: the bleeder circuit mid point links to each other in the middle of described in the input of described input voltage detection circuit P1 and the described power circuit 1, described input current testing circuit P2 links to each other with described shunt resistance R1 one end in the described power circuit 1, described output voltage detecting circuit P3 links to each other with described output bleeder circuit mid point in the described power circuit 1, and the gate pole of the described copped wave power device S1 in the output of described driving pulse amplifying circuit P4 and the described power circuit 1 links to each other.
Preferably, described control module 3 comprises eight digital modules finishing control algolithm, is divided into ring module in voltage squared control outer shroud module and the Current Control, wherein:
Described voltage squared control outer shroud module comprises a digital module, i.e. voltage squared PI adjustment module U5, and the first entrance of described voltage squared PI adjustment module U5 links to each other with described output voltage detecting circuit P3 output in the described auxiliary circuit 2; The second entrance is given voltage squared, and outlet links to each other with the second entrance of the input power requirements computing module U4 of ring in the module in the described Current Control.
The ring module comprises seven digital modules in the described Current Control, be that 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 current reference value computing module U6, current PI adjustment module U7 and driving pulse form module U8, wherein:
The entrance of described input voltage effective value computing module U1 links to each other with described input voltage detection circuit P1 output in the described auxiliary circuit 2, and outlet links to each other with the first entrance of described input power mean value calculation module U3;
The entrance of described input current effective value computing module U2 links to each other with described input current testing circuit P2 output in the described auxiliary circuit 2, and outlet links to each other with the second entrance of described input power mean value calculation module U3;
The outlet of described input power mean value calculation module U3 links to each other with the first entrance of described input power requirements computing module U4;
The outlet of described input power requirements computing module U4 links to each other with the first entrance of described input current reference value computing module U6;
The second entrance of described input current reference value computing module U6 links to each other with described input voltage detection circuit P1 output in the described auxiliary circuit 2, and outlet links to each other with the second entrance of described current PI adjustment module U7;
The first entrance of described current PI adjustment module U7 links to each other with described input current testing circuit P2 output in the described auxiliary circuit 2, and outlet links to each other with the entrance that described driving pulse forms module U8;
The input of described driving pulse amplifying circuit P4 in the outlet that described driving pulse forms module U8 and the described auxiliary circuit 2 links to each other.
The present embodiment adopts described power circuit 1, described auxiliary circuit 2 and described control module 3 realize the repertoire of the single-phase AC-DC translation circuit of directive overrurrent relay, described power circuit 1 is the power circuit of traditional single-phase active PFC, described auxiliary circuit 2 also comprises the testing circuit of various necessary electric weight in the power circuit commonly used and the drive circuit of power device, difference is to have adopted the function that directly realizes single-phase active PFC towards the control algolithm of net side power, described control module 3 is the core, be used for realizing the direct net side power control algorithm of single-phase power factor correcting device, concrete:
Described voltage squared PI adjustment module U5 is responsible for the VD instantaneous value that measures according to described output voltage detecting circuit P3, it is asked square, then given voltage squared (actual given voltage for obtaining after square) is deducted the difference of two squares that square obtains of output voltage instantaneous value, then the difference of two squares is carried out proportional integral and regulate (PI), the controlled quentity controlled variable of controlled voltage squared, the controlled quentity controlled variable of this controlled quentity controlled variable reflection power output changes in demand amount also is to keep the constant controlled quentity controlled variable of output voltage stabilization simultaneously;
Described input voltage effective value computing module U1 is responsible for the input voltage instantaneous value that measures according to described input voltage detection circuit P1, the method of employing sliding window is processed the input voltage instantaneous value of half power cycle, calculates the higher input voltage effective value of real-time;
Described input current effective value computing module U2 is responsible for the input current instantaneous value that measures according to described input current testing circuit P2, it is the terminal voltage of described shunt resistance R1, the current instantaneous value that reflects described boost inductance L1, the method of employing sliding window is processed the input current instantaneous value of half power cycle, calculates the higher input current effective value of real-time;
Described input power mean value calculation module U3 is responsible for the input current effective value that input voltage effective value that described input voltage effective value computing module U1 is calculated and described input current effective value computing module U2 calculate and multiplies each other, and obtains the stronger current actual input power of real-time;
Described input power requirements computing module U4 is responsible for the controlled quentity controlled variable addition of the reflection power output changes in demand amount of current actual input power that described input power mean value calculation module U3 is obtained and described voltage PI adjustment module U5 output, obtain the current overall power requirement that need to obtain from electrical network, i.e. DC quantity;
The current overall power requirement that need to obtain from electrical network that described input current reference value computing module U6 obtains described input power requirements computing module U4, divided by the input voltage instantaneous value, obtain the instantaneous value of input current, be the reference current of current inner loop, this reference current is admitted to described current PI adjustment module U7;
Described current PI adjustment module U7 deducts the input current detected value with the reference current that described input current reference value computing module U6 obtains, obtain the deviation electric current, carry out again proportional integral and regulate, obtain the final similar duty ratio function of sine wave, send into described driving pulse and form module U8;
Described driving pulse forms module U8 and is responsible for the duty ratio function that described current PI adjustment module U7 obtains is converted to original pwm signal, and this signal is sent into the described driving pulse amplifying circuit P4 of described auxiliary circuit 2;
The pwm pulse that described driving pulse amplifying circuit P4 output has driving force is sent into described power circuit 1, drives the break-make operation of described copped wave power device S1, finally finishes the function of PFC.
In this example: the AC-input voltage wide region, 85VAC～264VAC, power frequency, specified input voltage 220VAC, specified output dc voltage mean value 385VDC, the ripple voltage peak-to-peak value is 10V, rated output power 3.5kW, power base value are 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;
Copped wave power device S1:600V, 50A/100 ° of C;
Reverse fast recovery diode FRD1:600V, 35A/100 ° of 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 Uref:2.0V
2
Auxiliary circuit: filter circuit commonly used and drive circuit;
Digital signal processor: be used for control module, select the TMS320F28355 that supports floating-point operation.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (5)
1. the single-phase AC-DC translation circuit of a directive overrurrent relay is characterized in that comprising power circuit, auxiliary circuit and control module, and wherein: described power circuit is in order to finish the power conversion of single-phase AC-DC; Described auxiliary circuit is in order to finishing to the instantaneous detection of input voltage, input current, output voltage with to the driving of original pwm pulse, and various detected values are exported to described control module; After described control module is accepted the various detected values of described auxiliary circuit, carry out digital operation and logical process according to Direct Power and dicyclo control principle, and obtain final original driving pulse, after overdriving, be transported to described power circuit, the break-make rule of power ratio control device, so that described power circuit is finished power factor correction, and the direct voltage of stable output;
Described control module comprises ring module in voltage squared control outer shroud module and the Current Control, and described voltage squared control outer shroud module comprises voltage squared PI adjustment module; The ring module comprises that input voltage effective value computing module, input current effective value computing module, input power mean value calculation module, input power requirements computing module, input current reference value computing module, current PI adjustment module and driving pulse form module in the described Current Control, wherein:
Described voltage squared PI adjustment module, the responsible VD instantaneous value that measures according to described output voltage detecting circuit, it is asked square, then given voltage squared is deducted the difference of two squares that square obtains of output voltage instantaneous value, then the difference of two squares being carried out proportional integral regulates, the controlled quentity controlled variable of controlled voltage squared, the controlled quentity controlled variable of this controlled quentity controlled variable reflection power output changes in demand amount also is to keep the constant controlled quentity controlled variable of output voltage stabilization simultaneously;
Described input voltage effective value computing module is responsible for the input voltage instantaneous value that measures according to described input voltage detection circuit, the method of employing sliding window is processed the input voltage instantaneous value of half power cycle, calculates the higher input voltage effective value of real-time;
Described input current effective value computing module is responsible for the input current instantaneous value that measures according to described input current testing circuit, it is the terminal voltage of described shunt resistance, the instantaneous value that reflects the electric current of described boost inductance, the method of employing sliding window is processed the input current instantaneous value of half power cycle, calculates the higher input current effective value of real-time;
Described input power mean value calculation module is responsible for the input current effective value that input voltage effective value that described input voltage effective value computing module is calculated and described input current effective value computing module calculate and is multiplied each other, and obtains the stronger current actual input power of real-time;
Described input power requirements computing module is responsible for the controlled quentity controlled variable addition of the reflection power output changes in demand amount of current actual input power that described input power mean value calculation module is obtained and the output of described voltage squared PI adjustment module, obtain the current overall power requirement that need to obtain from electrical network, be DC quantity;
Described input current reference value computing module is with the above-mentioned current overall power requirement that need to obtain from electrical network, divided by the input voltage instantaneous value, obtain the instantaneous value of input current, i.e. the reference current of current inner loop, this reference current is admitted to described current PI adjustment module;
Described current PI adjustment module deducts the input current detected value with above-mentioned reference current, obtains the deviation electric current, carries out proportional integral again and regulates, and obtains the final similar duty ratio function of sine wave, sends into described driving pulse and forms module;
Described driving pulse forms module and is responsible for duty ratio function obtained above is converted to original pwm signal, and this signal is sent into the driving pulse amplifying circuit of described auxiliary circuit;
The pwm pulse that described driving pulse amplifying circuit output has driving force is sent into described power circuit, drives the break-make operation of copped wave power device, finally finishes the function of PFC.
2. the single-phase AC-DC translation circuit of a kind of directive overrurrent relay according to claim 1 is characterized in that, described power circuit comprises rectification circuit, booster circuit, shunt circuit and bleeder circuit, wherein:
Described rectification circuit comprises the ac capacitor that is parallel to the net side and by first, second, the 3rd, the single-phase rectification bridge that the 4th diode consists of, the two ends of described ac capacitor are parallel to alternating current net side, the first brachium pontis of described single-phase rectification bridge comprises the first diode and second diode of series connection, the second brachium pontis of described single-phase rectification bridge comprises the 3rd diode and the 4th diode of series connection, described first, the high-end common cathode of the second brachium pontis links to each other and forms positive pole, described first, the low side common anode of the second brachium pontis extremely links to each other and forms negative pole, described first, the mid point of the second brachium pontis links to each other with the two ends of described ac capacitor;
Described booster circuit comprises boost inductance, reverse fast recovery diode, copped wave power device and electrochemical capacitor, one end of described boost inductance links to each other with the described single-phase rectification bridge in the described rectification circuit is anodal, the other end links to each other with the anode of described reverse fast recovery diode, the collector electrode of described copped wave power device, form the direct current output cathode after the negative electrode of described reverse fast recovery diode links to each other with the positive pole of described electrochemical capacitor, form the direct current output negative pole after the emission electrode of described electric copped wave power device links to each other with the negative pole of described electrochemical capacitor;
Described shunt circuit is a shunt resistance, the negative pole of the described single-phase rectification bridge in one end of described shunt resistance and the described rectification circuit links to each other, and the emission electrode of the described copped wave power device in the other end and the described booster circuit, the negative pole of described electrochemical capacitor link to each other;
Bleeder circuit and output bleeder circuit in the middle of described bleeder circuit comprises, bleeder circuit comprises the second resistance, the 3rd resistance that is parallel to rectification circuit output end after the series connection in the middle of described, the positive pole of the described single-phase rectification bridge in one end of described the second resistance and the described rectification circuit links to each other, the other end links to each other with an end of described the 3rd resistance, and an end of the negative pole of the described single-phase rectification bridge in the other end of described the 3rd resistance and the described rectification circuit, the described shunt resistance in the described shunt circuit links to each other; Described output bleeder circuit comprises the 4th resistance, the 5th resistance that is parallel to dc output end after the series connection, one end of described the 4th resistance links to each other with described direct current output cathode, the other end links to each other with an end of described the 5th resistance, the other end of described the 5th resistance links to each other with described direct current output negative pole, and namely the negative pole of the other end of described shunt resistance, the emission electrode of described copped wave power device, described electrochemical capacitor links to each other.
3. the single-phase AC-DC translation circuit of a kind of directive overrurrent relay according to claim 2 is characterized in that, described auxiliary circuit comprises input voltage detection circuit, input current testing circuit, output voltage detecting circuit and driving pulse amplifying circuit, wherein:
The bleeder circuit mid point links to each other in the middle of described in the input of described input voltage detection circuit and the described power circuit, described input current testing circuit links to each other with described shunt resistance one end in the described power circuit, described output voltage detecting circuit links to each other with described output bleeder circuit mid point in the described power circuit, and the gate pole of the described copped wave power device in the output of described driving pulse amplifying circuit and the described power circuit links to each other.
4. the single-phase AC-DC translation circuit of each described a kind of directive overrurrent relay according to claim 1-3, it is characterized in that, described voltage squared control outer shroud module comprises voltage squared PI adjustment module, and the first entrance of described voltage squared PI adjustment module links to each other with the output voltage detecting circuit output of described auxiliary circuit; The second entrance is given voltage squared, and outlet links to each other with second entrance of input power requirements computing module of ring module in the described Current Control.
5. the single-phase AC-DC translation circuit of each described a kind of directive overrurrent relay according to claim 1-3, it is characterized in that, the ring module comprises that input voltage effective value computing module, input current effective value computing module, input power mean value calculation module, input power requirements computing module, input current reference value computing module, current PI adjustment module and driving pulse form module in the described Current Control, wherein:
The entrance of described input voltage effective value computing module links to each other with the described input voltage detection circuit output of described auxiliary circuit, and outlet links to each other with the first entrance of described input power mean value calculation module;
The entrance of described input current effective value computing module links to each other with described input current testing circuit output in the described auxiliary circuit, and outlet links to each other with the second entrance of described input power mean value calculation module;
The outlet of described input power mean value calculation module links to each other with the first entrance of described input power requirements computing module;
The outlet of described input power requirements computing module links to each other with the first entrance of described input current reference value computing module;
The second entrance of described input current reference value computing module links to each other with described input voltage detection circuit output in the described auxiliary circuit, and outlet links to each other with the second entrance of described current PI adjustment module;
The first entrance of described current PI adjustment module links to each other with described input current testing circuit output in the described auxiliary circuit, and outlet links to each other with the entrance that described driving pulse forms module;
The input of the described driving pulse amplifying circuit in the outlet that described driving pulse forms module and the described auxiliary circuit links to each other.
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| CN104330616B (en) * | 2014-11-05 | 2017-06-06 | 中国科学院电工研究所 | A kind of power network alternating current virtual value real-time detection method |
| CN105006975A (en) * | 2015-08-07 | 2015-10-28 | 西南交通大学 | Frequency converting control method of LLC resonant converter and apparatus thereof |
| CN105006975B (en) * | 2015-08-07 | 2017-11-14 | 西南交通大学 | LLC resonant converter method for controlling frequency conversion and its device |
| CN107979278A (en) * | 2016-10-24 | 2018-05-01 | 南京理工大学 | A kind of width load step-up type power factor correcting converter |
| CN107437899A (en) * | 2017-09-13 | 2017-12-05 | 上海交通大学 | The sinusoidal single-phase AC DC translation circuits of net stream |
| CN109831187A (en) * | 2019-03-28 | 2019-05-31 | 上海交通大学 | A kind of changeable frequency triangular carrier generation circuit |
| CN109831187B (en) * | 2019-03-28 | 2021-01-05 | 上海交通大学 | Variable-frequency triangular carrier generation circuit |
| TWI700962B (en) * | 2019-07-19 | 2020-08-01 | 峒鑫科技股份有限公司 | Lighting device |
| CN113726170A (en) * | 2021-07-14 | 2021-11-30 | 合肥工业大学 | Control method of LLC resonant circuit based on current feedback |
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