CN103904902A - Multi-energy input power converter control device - Google Patents
Multi-energy input power converter control device Download PDFInfo
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- CN103904902A CN103904902A CN201410137569.2A CN201410137569A CN103904902A CN 103904902 A CN103904902 A CN 103904902A CN 201410137569 A CN201410137569 A CN 201410137569A CN 103904902 A CN103904902 A CN 103904902A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a multi-energy input power converter control device in the electric power converting field. The multi-energy input power converter control device is characterized by comprising a main circuit and a control circuit, the main circuit comprises a boosted circuit, a double-active bridge DC-DC converter and a voltage stabilizing capacitor, all of which are arranged in sequence from double input ends to the output end, the control circuit comprises a storage battery voltage sampling circuit, a storage battery current sampling circuit, a photovoltaic cell voltage sampling circuit, a photovoltaic cell current sampling circuit, a full-bridge inverter bridge arm mid-point voltage sampling circuit, a full-bridge inverter current sampling circuit, an output voltage sampling circuit and an output current sampling circuit, the output end of the storage battery voltage sampling circuit is connected to a digital signal processor, and the signal output end of the digital signal processor is connected with a ten-path power tube drive circuit. The multi-energy input power converter control device dynamically compensates for the primary side volt-second value of a high-frequency converter to eliminate magnetic biasing, the output voltage stabilizing and power current controlling can be achieved by adjusting the phase-shifting angle of a primary side inverter and an auxiliary side rectifier, and the multi-energy input power converter control device can be used in photovoltaic power generation.
Description
Technical field
The present invention relates to a kind of power converter, particularly a kind of for photovoltaic generation power converter.
Background technology
The maximum power output of photovoltaic cell is affected by intensity of illumination directly, and the power-converting device taking photovoltaic as input energy sources will depart from the best operating point of photovoltaic in the time of the fluctuation of load, thereby causes the waste of photovoltaic energy or lose the situation of load.Be integrated with many input translators of energy storage device, can ensureing that photovoltaic cell, in best operating point, utilizes energy storage device proof load demand.In security consideration, in photovoltaic generation use, high power converter generally adopts the scheme of electromagnetic isolation, and AC is connected to transformer.In actual motion, many factors makes transformer primary side weber excitation imbalance, causes that transformer core magnetization curve is no longer about origin symmetry, the weber accumulation of excitation deviation will cause magnetic core further saturated, cause one direction magnetizing current to increase severely, loss increases, and can cause switching tube to damage.The multiplex analog circuit of phase-shift PWM coordinates DSP and FPGA to realize, and these methods exist shortcomings such as realizing complexity, control precision finite sum control function singleness.
Summary of the invention
The object of the invention is the problem that affected by intensity of illumination for photovoltaic maximum power output, a kind of multiple-energy-source input electric power controller for transducer is provided, realize the collaborative generating of multiple-energy-source, propose active magnetic bias inhibition method, and realize output voltage stabilizing and power flow control.
The object of the present invention is achieved like this: a kind of multiple-energy-source input electric power controller for transducer, comprises main circuit and control circuit;
Described main circuit comprises the booster circuit being set gradually by double input end to output, two active bridge DC dc converter and electric capacity of voltage regulation C3, and the double input end of main circuit is respectively photovoltaic cell end V
s-G
1with accumulator terminal V
b-G
2, series diode D1 and the second metal-oxide-semiconductor S2 between main circuit electrode points P and electrode points G, electrode points B and photovoltaic cell between diode D1 and metal-oxide-semiconductor S2 are inputted anodal V
sbetween be serially connected with inductance L 1 and protection diode D
b, inductance L 1 and protection diode D
bbetween electrode points A and storage battery input anodal V
bbetween be serially connected with filter capacitor C1, described electrode points A and photovoltaic cell input negative pole G
1between be serially connected with filter capacitor C2, photovoltaic cell input negative pole G
1with storage battery input negative pole G
2between be serially connected with metal-oxide-semiconductor S1, described booster circuit is made up of inductance L 1, diode D1 and metal-oxide-semiconductor S2, the former limit of described two active bridge DC dc converters comprises the 3rd metal-oxide-semiconductor S3, the 4th metal-oxide-semiconductor S4, the 5th metal-oxide-semiconductor S5 and the 6th metal-oxide-semiconductor S6, described the 3rd metal-oxide-semiconductor S3 is connected with main circuit electrode points Q, the secondary of two active bridge DC dc converters comprises the 7th IGBT pipe S7, the 8th IGBT pipe S8, the 9th IGBT pipe S9 and the tenth IGBT pipe S10, and described electric capacity of voltage regulation C3 is serially connected between main circuit electrode points M and electrode points N;
Described control circuit comprises that output is connected to the battery tension sample circuit on digital signal processor, battery current sample circuit, photovoltaic cell voltage sampling circuit, photovoltaic cell current sampling circuit, full-bridge inverter brachium pontis mid-point voltage sample circuit, full-bridge inverter current sampling circuit, output voltage sampling circuit and output current sample circuit, the signal output part of described digital signal processor is connected with the first metal-oxide-semiconductor drive circuit, the second metal-oxide-semiconductor drive circuit, the 3rd metal-oxide-semiconductor drive circuit, the 4th metal-oxide-semiconductor drive circuit, the 5th metal-oxide-semiconductor drive circuit, the 6th metal-oxide-semiconductor drive circuit, the 7th IGBT tube drive circuit, the 8th IGBT tube drive circuit, the 9th IGBT tube drive circuit, the tenth IGBT tube drive circuit.
As further restriction of the present invention, the input of described battery tension sample circuit is connected to main circuit storage battery and inputs anodal V
bon, the output of battery tension sample circuit is connected on digital signal processor, voltage signal by bleeder circuit dividing potential drop after through filter capacitor filtering, then give voltage follower U1A, then export to digital signal processor via the voltage limiter of diode D1 and diode D2 composition; Described photovoltaic cell voltage sampling circuit is identical with battery tension sample circuit.
As further restriction of the present invention, the input of described battery current sample circuit is serially connected in main circuit storage battery and inputs anodal V
band between storage battery, the output of described battery current sample circuit is connected on digital signal processor, current signal sends to filter circuit after current sensor U3 sampling, after sampled signal filtering, give current follower U2A, then export to digital signal processor via the voltage limiter of diode D3, diode D4 composition.
As further restriction of the present invention, the input of described photovoltaic cell current sampling circuit is serially connected in main circuit photovoltaic cell and inputs anodal V
sand between photovoltaic cell, the output of described photovoltaic cell current sampling circuit is connected on digital signal processor, current signal sends to filter circuit after current sensor U5 sampling, after sampled signal filtering, pass through successively current follower U5B, subtracter U5A, amplifier U5C, then export to digital signal processor through the voltage limiter of diode D5, diode D6 composition; Described output current sample circuit is identical with photovoltaic cell current sampling circuit.
As further restriction of the present invention, the input of described full-bridge inverter brachium pontis mid-point voltage sample circuit is connected on full-bridge inverter mid point, the output of described full-bridge inverter brachium pontis mid-point voltage sample circuit is connected on digital signal processor, voltage signal after bleeder circuit dividing potential drop by filter circuit filtering, send to again voltage follower U6A, then the voltage limiter being made up of diode D7 and diode D8 is exported to digital signal processor.
As further restriction of the present invention, the input of full-bridge inverter current sampling circuit is connected on main circuit electrode points P and electrode points Q, the output of full-bridge inverter current sampling circuit is connected on digital signal processor, current signal carries out filtering after current sensor U7 sampling, filtered signal is through current follower U8A and profile detection circuit, then the voltage limiter being made up of diode D9 and diode D10 is exported to digital signal processor.
As further restriction of the present invention, the input of described output voltage sampling circuit be connected on main circuit electrode points M and electrode points N, the output of described output voltage sampling circuit is connected on digital signal processor, voltage signal is converted into through sampling resistor R21 the electric current that rated value is 25mA, after Hall voltage transmitter U9 conversion by its amplification, through low-pressure side sampling resistor, R23 is converted into corresponding voltage, then the voltage limiter of the low pass filter forming through resistance R 22 capacitor C 10 and diode D12, D13 composition is exported to digital signal processor.
As further restriction of the present invention, described digital signal processor adopts dsPIC33FJ64GS606 chip.
The present invention is in the time realizing initiatively magnetic bias inhibition, to after the average voltage sampling of full-bridge inverter two mid point C and D, send to digital signal processor by full-bridge inverter brachium pontis mid-point voltage sample circuit, digital signal processor carries out zero error PI by the two-way magnitude of voltage after sampling and regulates the increment that amplifies the former limit of generation duty ratio, after adding 0.5 perunit value, export as the duty ratio of former limit full-bridge inverter, suppress thereby realize initiatively magnetic bias; Simultaneously, by adopting the two closed loop modes that encircle in outer voltage and peak current, two closed loops are output as full-bridge rectifier square-wave modulation signal phase shifting angle, phase shifting angle scope is made as-90 ° ~ 90 °, by regulating phase shifting angle control output voltage and power flow direction, two-way can transmitted power size can control via outer voltage output valve amplitude limit.Compared with prior art, beneficial effect of the present invention is, the present invention is by regulating the Inverter Square Wave duty ratio of former limit inverter, dynamic compensation high frequency transformer former limit weber value elimination magnetic bias, simultaneously, by the sampling of secondary output voltage and primary current sampling, regulate the phase shifting angle of former limit inverter and secondary rectifier, realize output voltage stabilizing and power flow control.The present invention can be used in photovoltaic generation.
Brief description of the drawings
Fig. 1 is main circuit schematic diagram of the present invention.
Fig. 2 is control circuit module map of the present invention.
Fig. 3 is battery tension sample circuit schematic diagram in the present invention.
Fig. 4 is battery current sample circuit schematic diagram in the present invention.
Fig. 5 is photovoltaic cell current sampling circuit schematic diagram in the present invention.
Fig. 6 is full-bridge inverter brachium pontis mid-point voltage sample circuit schematic diagram in the present invention.
Fig. 7 is full-bridge inverter current sampling circuit schematic diagram in the present invention.
Fig. 8 is output voltage sampling circuit schematic diagram in the present invention.
Fig. 9 is magnetic saturation control logic schematic diagram in the present invention.
Figure 10 is dicyclo control logic schematic diagram in the present invention.
Embodiment
A kind of multiple-energy-source input electric power controller for transducer as shown in Fig. 1-8, comprises main circuit and control circuit;
Described main circuit comprises the booster circuit being set gradually by double input end to output, two active bridge DC dc converter and electric capacity of voltage regulation C3, and the double input end of main circuit is respectively photovoltaic cell end V
s-G
1with accumulator terminal V
b-G
2, series diode D1 and the second metal-oxide-semiconductor S2 between main circuit electrode points P and electrode points G, electrode points B and photovoltaic cell between diode D1 and metal-oxide-semiconductor S2 are inputted anodal V
sbetween be serially connected with inductance L 1 and protection diode D
b, inductance L 1 and protection diode D
bbetween electrode points A and storage battery input anodal V
bbetween be serially connected with filter capacitor C1, described electrode points A and photovoltaic cell input negative pole G
1between be serially connected with filter capacitor C2, photovoltaic cell input negative pole G
1with storage battery input negative pole G
2between be serially connected with metal-oxide-semiconductor S1, described booster circuit is by inductance L 1, diode D1 and metal-oxide-semiconductor S2 composition, the former limit of described two active bridge DC dc converters comprises the 3rd metal-oxide-semiconductor S3, the 4th metal-oxide-semiconductor S4, the 5th metal-oxide-semiconductor S5 and the 6th metal-oxide-semiconductor S6, described the 3rd metal-oxide-semiconductor S3 is connected with main circuit electrode points Q, the secondary of two active bridge DC dc converters comprises the 7th IGBT pipe S7, the 8th IGBT pipe S8, the 9th IGBT pipe S9 and the tenth IGBT pipe S10, described electric capacity of voltage regulation C3 is serially connected between main circuit electrode points M and electrode points N, described digital signal processor adopts dsPIC33FJ64GS606 chip,
Described control circuit comprises that output is connected to the battery tension sample circuit on digital signal processor, battery current sample circuit, photovoltaic cell voltage sampling circuit, photovoltaic cell current sampling circuit, full-bridge inverter brachium pontis mid-point voltage sample circuit, full-bridge inverter current sampling circuit, output voltage sampling circuit and output current sample circuit, the signal output part of described digital signal processor is connected with the first metal-oxide-semiconductor drive circuit, the second metal-oxide-semiconductor drive circuit, the 3rd metal-oxide-semiconductor drive circuit, the 4th metal-oxide-semiconductor drive circuit, the 5th metal-oxide-semiconductor drive circuit, the 6th metal-oxide-semiconductor drive circuit, the 7th IGBT tube drive circuit, the 8th IGBT tube drive circuit, the 9th IGBT tube drive circuit, the tenth IGBT tube drive circuit.
The input of described battery tension sample circuit is connected to main circuit storage battery and inputs anodal V
bon, the output of battery tension sample circuit is connected on digital signal processor, voltage signal by bleeder circuit dividing potential drop after through filter capacitor filtering, then give voltage follower U1A, then export to digital signal processor via the voltage limiter of diode D1 and diode D2 composition; Described photovoltaic cell voltage sampling circuit is identical with battery tension sample circuit.
The input of described battery current sample circuit is serially connected in main circuit storage battery and inputs anodal V
band between storage battery, the output of described battery current sample circuit is connected on digital signal processor, current signal sends to filter circuit after current sensor U3 sampling, after sampled signal filtering, give current follower U2A, then export to digital signal processor via the voltage limiter of diode D3, diode D4 composition.
The input of described photovoltaic cell current sampling circuit is serially connected in main circuit photovoltaic cell and inputs anodal V
sand between photovoltaic cell, the output of described photovoltaic cell current sampling circuit is connected on digital signal processor, current signal sends to filter circuit after current sensor U5 sampling, after sampled signal filtering, pass through successively current follower U5B, subtracter U5A, amplifier U5C, then export to digital signal processor through the voltage limiter of diode D5, diode D6 composition; Described output current sample circuit is identical with photovoltaic cell current sampling circuit.
The input of described full-bridge inverter brachium pontis mid-point voltage sample circuit is connected on full-bridge inverter mid point, the output of described full-bridge inverter brachium pontis mid-point voltage sample circuit is connected on digital signal processor, voltage signal after bleeder circuit dividing potential drop by filter circuit filtering, send to again voltage follower U6A, then the voltage limiter being made up of diode D7 and diode D8 is exported to digital signal processor.
The input of full-bridge inverter current sampling circuit is connected on main circuit electrode points P and electrode points Q, the output of full-bridge inverter current sampling circuit is connected on digital signal processor, current signal carries out filtering after current sensor U7 sampling, filtered signal is through current follower U8A and profile detection circuit, then the voltage limiter being made up of diode D9 and diode D10 is exported to digital signal processor.
The input of described output voltage sampling circuit is connected on main circuit electrode points M and electrode points N, the output of described output voltage sampling circuit is connected on digital signal processor, voltage signal is converted into through sampling resistor R21 the electric current that rated value is 25mA, after Hall voltage transmitter U9 conversion, amplified 0.4 times, through low-pressure side sampling resistor, R23 is converted into corresponding voltage, then the voltage limiter of the low pass filter forming through resistance R 22 capacitor C 10 and diode D12, D13 composition is exported to digital signal processor.
Magnetic saturation control principle: as shown in Figure 9, after the voltage sample of full-bridge inverter two mid point C and D filtering being obtained to mean value by full-bridge inverter brachium pontis mid-point voltage sample circuit, send to digital signal processor, signal converts to after digital quantity through the analog to digital converter in digital signal processor, obtain the e in Fig. 9 through additive operation, the result that reference value 0 deducts after e is passed through controller C, and output is the increment Delta d of limit, claim 8 Central Plains inverter bridge duty ratio.In figure, C is PI controller, and G is inverter, the operation that in H representative graph 6, sample circuit, AD conversion and digital quantity subtract each other.
Dicyclo control principle: as shown in figure 10, C
vfor voltage controller, C
ifor current controller, G
vpfor controlling phase shifting angle to output voltage V
mNtransfer function, Gip for control phase shifting angle to input current I
pQtransfer function, H
ifor the transfer function of full-bridge inverter current sampling circuit, H
vfor the transfer function of output voltage sampling circuit.In output voltage V
mNwhen control, C
voutput phase shifting angle between 0～90 °.If because output port rear class has energy back, C
vvoltage error is before for negative, and output phase shifting angle automatic moving is extremely between-90～0 °, and power flow direction becomes load and charges to battery.
The present invention is not limited to above-described embodiment; on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.
Claims (8)
1. a multiple-energy-source input electric power controller for transducer, is characterized in that, comprises main circuit and control circuit;
Described main circuit comprises the booster circuit being set gradually by double input end to output, two active bridge DC dc converter and electric capacity of voltage regulation C3, and the double input end of main circuit is respectively photovoltaic cell end V
s-G
1with accumulator terminal V
b-G
2, series diode D1 and the second metal-oxide-semiconductor S2 between main circuit electrode points P and electrode points G, electrode points B and photovoltaic cell between diode D1 and metal-oxide-semiconductor S2 are inputted anodal V
sbetween be serially connected with inductance L 1 and protection diode D
b, inductance L 1 and protection diode D
bbetween electrode points A and storage battery input anodal V
bbetween be serially connected with filter capacitor C1, described electrode points A and photovoltaic cell input negative pole G
1between be serially connected with filter capacitor C2, photovoltaic cell input negative pole G
1with storage battery input negative pole G
2between be serially connected with metal-oxide-semiconductor S1, described booster circuit is made up of inductance L 1, diode D1 and metal-oxide-semiconductor S2, the former limit of described two active bridge DC dc converters comprises the 3rd metal-oxide-semiconductor S3, the 4th metal-oxide-semiconductor S4, the 5th metal-oxide-semiconductor S5 and the 6th metal-oxide-semiconductor S6, described the 3rd metal-oxide-semiconductor S3 is connected with main circuit electrode points Q, the secondary of two active bridge DC dc converters comprises the 7th IGBT pipe S7, the 8th IGBT pipe S8, the 9th IGBT pipe S9 and the tenth IGBT pipe S10, and described electric capacity of voltage regulation C3 is serially connected between main circuit electrode points M and electrode points N;
Described control circuit comprises that output is connected to the battery tension sample circuit on digital signal processor, battery current sample circuit, photovoltaic cell voltage sampling circuit, photovoltaic cell current sampling circuit, full-bridge inverter brachium pontis mid-point voltage sample circuit, full-bridge inverter current sampling circuit, output voltage sampling circuit and output current sample circuit, the signal output part of described digital signal processor is connected with the first metal-oxide-semiconductor drive circuit, the second metal-oxide-semiconductor drive circuit, the 3rd metal-oxide-semiconductor drive circuit, the 4th metal-oxide-semiconductor drive circuit, the 5th metal-oxide-semiconductor drive circuit, the 6th metal-oxide-semiconductor drive circuit, the 7th IGBT tube drive circuit, the 8th IGBT tube drive circuit, the 9th IGBT tube drive circuit, the tenth IGBT tube drive circuit.
2. a kind of multiple-energy-source input electric power controller for transducer according to claim 1, is characterized in that, the input of described battery tension sample circuit is connected to main circuit storage battery and inputs anodal V
bon, the output of battery tension sample circuit is connected on digital signal processor, voltage signal by bleeder circuit dividing potential drop after through filter capacitor filtering, then give voltage follower U1A, then export to digital signal processor via the voltage limiter of diode D1 and diode D2 composition; Described photovoltaic cell voltage sampling circuit is identical with battery tension sample circuit.
3. a kind of multiple-energy-source input electric power controller for transducer according to claim 1, is characterized in that, the input of described battery current sample circuit is serially connected in main circuit storage battery and inputs anodal V
band between storage battery, the output of described battery current sample circuit is connected on digital signal processor, current signal sends to filter circuit after current sensor U3 sampling, after sampled signal filtering, give current follower U2A, then export to digital signal processor via the voltage limiter of diode D3, diode D4 composition.
4. a kind of multiple-energy-source input electric power controller for transducer according to claim 1, is characterized in that, the input of described photovoltaic cell current sampling circuit is serially connected in main circuit photovoltaic cell and inputs anodal V
sand between photovoltaic cell, the output of described photovoltaic cell current sampling circuit is connected on digital signal processor, current signal sends to filter circuit after current sensor U5 sampling, after sampled signal filtering, pass through successively current follower U5B, subtracter U5A, amplifier U5C, then export to digital signal processor through the voltage limiter of diode D5, diode D6 composition; Described output current sample circuit is identical with photovoltaic cell current sampling circuit.
5. a kind of multiple-energy-source input electric power controller for transducer according to claim 1, it is characterized in that, the input of described full-bridge inverter brachium pontis mid-point voltage sample circuit is connected on full-bridge inverter mid point, the output of described full-bridge inverter brachium pontis mid-point voltage sample circuit is connected on digital signal processor, voltage signal after bleeder circuit dividing potential drop by filter circuit filtering, send to again voltage follower U6A, then the voltage limiter being made up of diode D7 and diode D8 is exported to digital signal processor.
6. a kind of multiple-energy-source input electric power controller for transducer according to claim 1, it is characterized in that, the input of full-bridge inverter current sampling circuit is connected on main circuit electrode points P and electrode points Q, the output of full-bridge inverter current sampling circuit is connected on digital signal processor, current signal carries out filtering after current sensor U7 sampling, filtered signal is through current follower U8A and profile detection circuit, then the voltage limiter being made up of diode D9 and diode D10 is exported to digital signal processor.
7. a kind of multiple-energy-source input electric power controller for transducer according to claim 1, it is characterized in that, the input of described output voltage sampling circuit is connected on main circuit electrode points M and electrode points N, the output of described output voltage sampling circuit is connected on digital signal processor, voltage signal is converted into through sampling resistor R21 the electric current that rated value is 25mA, after Hall voltage transmitter U9 conversion by its amplification, through low-pressure side sampling resistor, R23 is converted into corresponding voltage, the low pass filter and the diode D12 that form through resistance R 22 capacitor C 10 again, the voltage limiter of D13 composition is exported to digital signal processor.
8. according to a kind of multiple-energy-source input electric power controller for transducer described in any one in claim 1-7, it is characterized in that, described digital signal processor adopts dsPIC33FJ64GS606 chip.
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