CN110829798B - Module series type high-voltage direct-current power supply - Google Patents
Module series type high-voltage direct-current power supply Download PDFInfo
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- CN110829798B CN110829798B CN201911085678.3A CN201911085678A CN110829798B CN 110829798 B CN110829798 B CN 110829798B CN 201911085678 A CN201911085678 A CN 201911085678A CN 110829798 B CN110829798 B CN 110829798B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0077—Plural converter units whose outputs are connected in series
Abstract
A module series connection type high-voltage direct-current power supply comprises a main circuit and a control circuit, wherein the main circuit is provided with a main module power level circuit, a slave module I power level circuit and a slave module II power level circuit, the control circuit is provided with a common outer loop, a main module average current loop, a slave module I average current loop and a slave module II average current loop, and the main module average current loop, the slave module I average current loop and the slave module II average current loop are respectively provided with a current sampling module, a PI adjusting module and a PWM module. The high-voltage 2000V output is realized in a mode of connecting modules in series, the unique series control method is adopted, the modules collect respective inductive currents, and loop independent control is carried out, so that the voltage-sharing and high-voltage output of each module can be met.
Description
Technical Field
The invention relates to the technical field of direct current power supplies, in particular to a module series type high-voltage direct current power supply.
Background
With the improvement of voltage grade in the photovoltaic and new energy automobile industry at present, a direct current power supply with higher voltage is required, is limited by the withstand voltage grade and the switching loss limit of a current power device, is mainly realized in a multi-level control mode of a switching device series connection mode, and has a more complex topological structure and control mode.
The modular power supply series connection is an effective mode for realizing high-voltage output, and the key of the modular power supply series connection is how to realize independent control of each module and guarantee voltage equalization, so that the related technology of the module series connection type high-voltage direct-current power supply is not researched much at present, and the technology is produced less. Because the series connection in-process, there is the electric potential lifting in high-voltage module, and traditional module series connection form only gathers low pressure module inductive current and controls, directly passes to high-voltage module drive path with the drive signal that low pressure module control loop produced on, can't realize high-voltage module loop independent control for the loop output is unstable, and power voltage uniformity nature and output quality are relatively poor.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides the module series connection type high-voltage direct-current power supply which realizes high-voltage 2000V output in a module series connection mode, collects respective inductive current by modules and performs loop independent control.
The technical scheme adopted by the invention for overcoming the technical problems is as follows:
a module series connection type high-voltage direct-current power supply comprises a main circuit and a control circuit, wherein the main circuit is provided with a main module power level circuit, a slave module I power level circuit and a slave module II power level circuit, the control circuit is provided with a common outer loop, a main module average current loop, a slave module I average current loop and a slave module II average current loop, the main module average current loop, the slave module I average current loop and the slave module II average current loop are respectively provided with a current sampling module, a PI adjusting module and a PWM module,
the positive electrode of the master module I power level circuit is connected with the negative electrode of the slave module I power level circuit, the positive electrode of the slave module I power level circuit is connected with the negative electrode of the slave module II power level circuit, and the master module I power level circuit, the slave module I power level circuit and the slave module II power level circuit are connected in series;
a current sampling module used for collecting the current value of the main module power level circuit in the main module average current loop is connected with a PI (proportional integral) adjusting module in the main module average current loop, the PI adjusting module in the main module average current loop is connected with a PWM (pulse width modulation) module in the main module average current loop, and the PWM module in the main module average current loop is connected with the main module power level circuit;
the current sampling module used for collecting the current value of the slave module I power stage circuit in the slave module I average current ring is connected with the PI adjusting module in the slave module I average current ring, the PI adjusting module in the slave module I average current ring is connected with the PWM module in the slave module I average current ring, and the PWM module in the slave module I average current ring is connected with the slave module I power stage circuit; .
A current sampling module used for collecting the current value of the slave module II power level circuit in the slave module II average current ring is connected with a PI (proportional integral) adjusting module in the slave module II average current ring, the PI adjusting module in the slave module II average current ring is connected with a PWM (pulse width modulation) module in the slave module II average current ring, and the PWM module in the slave module II average current ring is connected with the slave module II power level circuit;
the public outer loop is respectively connected with the main high-voltage isolation circuit and the PI adjusting module in the main module average current loop;
the high-voltage isolation circuit I is connected with the master high-voltage isolation circuit, the master high-voltage isolation circuit transmits a constant-current signal after high voltage isolation to the slave high-voltage isolation circuit I, the slave high-voltage isolation circuit I converts the constant-current signal into an outer ring output signal which is the same as a signal sent by a public outer ring, the outer ring output signal and a loop parameter fine tuning circuit obtain signal superposition, and the signal superposition is sent to a PI adjusting module in an average current ring of the slave module I;
the slave high-voltage isolation circuit II is connected to the slave high-voltage isolation circuit I, the slave high-voltage isolation circuit I transmits the constant-current signal after high voltage isolation to the slave high-voltage isolation circuit II, the slave high-voltage isolation circuit II converts the constant-current signal into an outer ring output signal which is the same as a signal sent by a public outer ring circuit, the outer ring output signal and the loop parameter fine tuning circuit obtain signal superposition, and the signal superposition is sent to a PI (proportional integral) adjusting module in an average current ring of the slave module II;
the loop parameter fine tuning circuit is connected with a PI adjusting module in an average current ring of a slave module I and a PI adjusting module in an average current ring of a slave module II, the loop parameter fine tuning circuit makes a difference between total voltage sampling signals of a master module power level circuit, the slave module I power level circuit and the slave module II power level circuit which are connected in series and a voltage sampling signal of the slave module I power level circuit, the difference is subjected to scaling and then summed with an outer ring output signal converted by a slave high-voltage isolating circuit I and then sent to the PI adjusting module in the average current ring of the slave module I, the loop parameter fine tuning circuit is used for connecting the master module power level circuit which is connected in series, and the difference is made between the total voltage sampling signals of the slave module I power level circuit and the slave module II power level circuit and the voltage sampling signals of the slave module II power level circuit, and the difference is subjected to scaling and then summed with an outer ring output signal converted from the high-voltage isolation circuit II and then sent to a PI adjusting module in a slave module II average current ring.
Furthermore, the main high-voltage isolation circuit comprises an operational amplifier I, a triode I, an operational amplifier II and an MOS tube I, wherein a public external loop is connected to the inverting input end of the operational amplifier I through a resistor R1, the non-inverting input end of the operational amplifier I is grounded, the inverting input end of the operational amplifier I is connected to the emitter of the triode I through a resistor R2, the output end of the operational amplifier I is connected to the base of the triode I, one end of the collector of the triode I is connected to a fixed potential through a resistor R3, the other end of the collector of the triode I is connected to the non-inverting input end of the operational amplifier II, the output end of the operational amplifier II is connected to the grid of the MOS tube I through a resistor R4, the source of the MOS tube I and the inverting input end of the operational amplifier II are connected.
Furthermore, the slave high-voltage isolation circuit I comprises an operational amplifier III, an operational amplifier IV, a triode II, an operational amplifier V and a MOS transistor II, wherein an inverting input terminal of the operational amplifier III is connected to the resistor R5 through a resistor R7, a non-inverting input terminal thereof is grounded, one end of the resistor R8 is connected to the inverting input terminal of the operational amplifier III, and the other end thereof is connected to an output terminal of the operational amplifier III. The output end of the operational amplifier III is connected to the inverting input end of the operational amplifier IV through a resistor R9, the non-inverting input end of the operational amplifier IV is grounded, the inverting input end of the operational amplifier IV is connected to the emitter of the triode II through a resistor R10, the output end of the operational amplifier IV is connected to the base of the triode II, one end of the collector of the triode II is connected to a fixed potential through a resistor R11, the other end of the collector of the triode II is connected to the non-inverting input end of the operational amplifier V, the output end of the operational amplifier V is connected to the grid of the MOS transistor II through a resistor R12, the source of the MOS transistor II and the inverting input end of the operational amplifier V are connected to the fixed.
Furthermore, the slave high-voltage isolation circuit ii includes an operational amplifier VI, an inverting input terminal of which is connected to the resistor R13 through the resistor R15, a non-inverting input terminal of which is grounded, and one end of the resistor R16 is connected to the inverting input terminal of the operational amplifier VI, and the other end of which is connected to an output terminal of the operational amplifier VI.
Further, the loop parameter fine tuning circuit includes an operational amplifier VII and an operational amplifier VIII, wherein one end of a resistor R17 is connected to the inverting input terminal of the operational amplifier VII, and the other end thereof is connected to the total voltage sampling signal of the main module power stage circuit, the slave module i power stage circuit and the slave module ii power stage circuit after being connected in series, one end of a resistor R18 is connected to the inverting input terminal of the operational amplifier VII, and the other end thereof is connected to the sampling voltage signal of the slave module i power stage circuit or the slave module ii power stage circuit, one end of a resistor R19 is connected to the inverting input terminal of the operational amplifier VII, and the other end thereof is connected to the output terminal of the operational amplifier VII, the non-inverting input terminal of the operational amplifier VII is grounded, the inverting input terminal of the operational amplifier VIII is connected to a resistor R20 and a resistor R21, and the other end of the, the capacitor I is connected with the resistor R21 in series, the other end of the capacitor I is grounded, the output end of the operational amplifier VII is connected between the resistor R21 and the capacitor I, the non-inverting input end of the operational amplifier VIII is grounded, the output end of the operational amplifier VIII is connected with the resistor R22, one end of the resistor R23 is connected with the inverting input end of the operational amplifier VIII, and the other end of the resistor R23 is connected with the resistor R22.
The invention has the beneficial effects that: the high-voltage 2000V output is realized in a mode of connecting modules in series, the unique series control method is adopted, the modules collect respective inductive currents, and loop independent control is carried out, so that the voltage-sharing and high-voltage output of each module can be met.
Drawings
FIG. 1 is a block diagram of the circuitry connections of the present invention;
FIG. 2 is a high voltage isolation circuit diagram of the present invention;
FIG. 3 is a block diagram of the transfer of loop parameters of the present invention;
FIG. 4 is a propagation block diagram of loop parameter fine tuning of the present invention;
FIG. 5 is a circuit diagram of a loop parameter trimming circuit according to the present invention;
in the figure, 1, a resistor R12, a resistor R23, an operational amplifier I4, a transistor I5, a resistor R36, an operational amplifier II 7, a resistor R48, a resistor R59, a MOS transistor I10, a resistor R611, a resistor R712, an operational amplifier III 13, a resistor R814, a resistor R915, a resistor R1016, an operational amplifier IV 17, a transistor II 18, a resistor R1119, an operational amplifier V20, a resistor R1221, a resistor R1322, a MOS transistor II 23, a resistor R1424, a resistor R1525, an operational amplifier VI 26, a resistor R1627, a resistor R1728, a resistor R1829, an operational amplifier VII 30, a resistor R1931, a resistor R2032, a resistor R2133, a capacitor 34, an operational amplifier VIII35, a resistor R2236 and a resistor R23 are included.
Detailed Description
The invention will be further described with reference to fig. 1 to 5.
As shown in figure 1, a modular series high voltage direct current power supply comprises a main circuit and a control circuit, wherein the main circuit is provided with a main modular power stage circuit, a slave modular I power stage circuit and a slave modular II power stage circuit, the control circuit is provided with a common outer loop, a main modular average current loop, a slave modular I average current loop and a slave modular II average current loop, the main modular average current loop, the slave modular I average current loop and the slave modular II average current loop are respectively provided with a current sampling module, a PI adjusting module and a PWM module,
the positive electrode of the master module I power level circuit is connected with the negative electrode of the slave module I power level circuit, the positive electrode of the slave module I power level circuit is connected with the negative electrode of the slave module II power level circuit, and the master module I power level circuit, the slave module I power level circuit and the slave module II power level circuit are connected in series;
a current sampling module used for collecting the current value of the main module power level circuit in the main module average current loop is connected with a PI (proportional integral) adjusting module in the main module average current loop, the PI adjusting module in the main module average current loop is connected with a PWM (pulse width modulation) module in the main module average current loop, and the PWM module in the main module average current loop is connected with the main module power level circuit;
the current sampling module used for collecting the current value of the slave module I power stage circuit in the slave module I average current ring is connected with the PI adjusting module in the slave module I average current ring, the PI adjusting module in the slave module I average current ring is connected with the PWM module in the slave module I average current ring, and the PWM module in the slave module I average current ring is connected with the slave module I power stage circuit;
a current sampling module used for collecting the current value of the slave module II power level circuit in the slave module II average current ring is connected with a PI (proportional integral) adjusting module in the slave module II average current ring, the PI adjusting module in the slave module II average current ring is connected with a PWM (pulse width modulation) module in the slave module II average current ring, and the PWM module in the slave module II average current ring is connected with the slave module II power level circuit;
the public outer loop is respectively connected with the main high-voltage isolation circuit and the PI adjusting module in the main module average current loop;
the high-voltage isolation circuit I is connected with the master high-voltage isolation circuit, the master high-voltage isolation circuit transmits a constant-current signal after high voltage isolation to the slave high-voltage isolation circuit I, the slave high-voltage isolation circuit I converts the constant-current signal into an outer ring output signal which is the same as a signal sent by a public outer ring, the outer ring output signal and a loop parameter fine tuning circuit obtain signal superposition, and the signal superposition is sent to a PI adjusting module in an average current ring of the slave module I;
the slave high-voltage isolation circuit II is connected to the slave high-voltage isolation circuit I, the slave high-voltage isolation circuit I transmits the constant-current signal after high voltage isolation to the slave high-voltage isolation circuit II, the slave high-voltage isolation circuit II converts the constant-current signal into an outer ring output signal which is the same as a signal sent by a public outer ring circuit, the outer ring output signal and the loop parameter fine tuning circuit obtain signal superposition, and the signal superposition is sent to a PI (proportional integral) adjusting module in an average current ring of the slave module II;
the loop parameter fine tuning circuit is connected with a PI adjusting module in an average current ring of a slave module I and a PI adjusting module in an average current ring of a slave module II, the loop parameter fine tuning circuit makes a difference between total voltage sampling signals of a master module power level circuit, the slave module I power level circuit and the slave module II power level circuit which are connected in series and a voltage sampling signal of the slave module I power level circuit, the difference is subjected to scaling and then summed with an outer ring output signal converted by a slave high-voltage isolating circuit I and then sent to the PI adjusting module in the average current ring of the slave module I, the loop parameter fine tuning circuit is used for connecting the master module power level circuit which is connected in series, and the difference is made between the total voltage sampling signals of the slave module I power level circuit and the slave module II power level circuit and the voltage sampling signals of the slave module II power level circuit, and the difference is subjected to scaling and then summed with an outer ring output signal converted from the high-voltage isolation circuit II and then sent to a PI adjusting module in a slave module II average current ring.
As shown in fig. 3, one path of the output signal a of the common outer loop circuit is transmitted to the PI adjustment module in the main module average current loop, and is used as a given signal, which is compared with the main module power stage circuit current value collected by the current sampling module in the main module average current loop to participate in PI adjustment, so as to adjust the output of the main module power stage circuit. The other path of the output signal a of the public outer loop circuit is transmitted to a main high-voltage isolation circuit, the main high-voltage isolation circuit transmits a constant current signal a1 after the signal a is isolated from high voltage to a slave high-voltage isolation circuit I, and the slave high-voltage isolation circuit I transmits a constant current signal a2 after the signal a1 is isolated from high voltage to a slave high-voltage isolation circuit II. The signal a1 in the high-voltage isolation circuit I is converted into an outer ring output signal a, the outer ring output signal a is superposed with a signal obtained by a loop parameter fine tuning circuit, as shown in figure 4, the loop parameter fine tuning circuit differentiates a total voltage sampling signal of a main module power stage circuit, a slave module I power stage circuit and a slave module II power stage circuit which are connected in series with a voltage sampling signal of the slave module I power stage circuit, the total voltage sampling signal is subjected to scaling and then summed with an outer ring output signal a converted from the high-voltage isolation circuit I, and the sum is sent to a PI adjusting module in a slave module I average current loop, the PI adjusting module performs signal comparison with a current value of the slave module I power stage circuit collected from a current sampling module in the module I average current loop, participates in PI adjustment, adjusts the output of the slave module I power stage circuit, and realizes voltage equalization. The signal a2 in the high-voltage isolation circuit II is converted into an outer ring output signal a, the outer ring output signal a is superposed with a signal obtained by a loop parameter fine tuning circuit, as shown in figure 4, the loop parameter fine tuning circuit makes a difference between a total voltage sampling signal of the main module power level circuit, the slave module I power level circuit and the slave module II power level circuit which are connected in series and a voltage sampling signal of the slave module II power level circuit, the difference is scaled and then summed with an outer ring output signal a converted from the high-voltage isolation circuit II and then sent to a PI adjusting module in the slave module II average current loop, and the PI adjusting module performs signal comparison with a current value of the slave module II power level circuit acquired by a current sampling module in the slave module II average current loop to participate in PI adjustment, so as to adjust the output of the slave module II power level circuit and realize voltage equalization.
The high-voltage 2000V output is realized in a mode of connecting modules in series, the unique series control method is adopted, the modules collect respective inductive currents, and loop independent control is carried out, so that the voltage-sharing and high-voltage output of each module can be met. As shown in the attached figure 2, the main high-voltage isolation circuit comprises an operational amplifier I3, a triode I4, an operational amplifier II 6 and a MOS transistor I9, a common external loop is connected to the inverting input end of the operational amplifier I3 through a resistor R11, the non-inverting input end of the operational amplifier I3 is grounded, the inverting input end of the operational amplifier I3 is connected to the emitter of the triode I4 through a resistor R22, the output end of the operational amplifier I3 is connected to the base of the triode I4, one end of the collector of the triode I4 is connected to a fixed potential through a resistor R35, the other end of the collector of the triode I4 is connected to the non-inverting input end of the operational amplifier II 6, the output end of the operational amplifier II 6 is connected to the gate of the MOS transistor I9 through a resistor R47, the source of, the drain of MOS transistor I9 is connected to resistor R58. An output signal a of the common outer loop enters an operational amplifier I3 through a resistor R11, a resistor R11, a resistor R22 and the operational amplifier I3 form a proportional operational amplifier, and a branch current I is obtained after the signal a is subjected to the proportional operational amplifieraBranch current IaA voltage signal U is obtained by a resistor R35 after being amplified by a triode I4R3Voltage signal UR3The voltage value of the non-inverting input end of the operational amplifier II 6 is also the voltage value of the non-inverting input end of the operational amplifier II 6, and the operational amplifier II 6 and the MOS tube I9 form a constant current circuit, so that when the operational amplifier II 6 reaches a steady state, the non-inverting input end of the operational amplifier II 6 is equal to the non-inverting input end of the operational amplifier II, namely the voltage at the upper end of the resistor R610 is UR3Since the resistor R35 is equal to the resistor R610, the current flowing through the resistor R610 is IaAnd the current of the branch circuit is equal to that of the input signal a, and the MOS tube I9 works in a saturation region (constant current). I isaConverted into a signal a1 through a resistor R58, wherein the resistor R35 changes the current signal into a voltage signal,resistor R47 acts as a current limiting.
As shown in fig. 2, the slave high-voltage isolation circuit I includes an operational amplifier III 12, an operational amplifier IV 16, a transistor II 17, an operational amplifier V19, and a MOS transistor II 22, an inverting input terminal of the operational amplifier III 12 is connected to a resistor R58 through a resistor R711, a non-inverting input terminal thereof is grounded, one end of a resistor R813 is connected to the inverting input terminal of the operational amplifier III 12, and the other end thereof is connected to an output terminal of the operational amplifier III 12. The output end of the operational amplifier III 12 is connected to the inverting input end of the operational amplifier IV 16 through a resistor R914, the non-inverting input end of the operational amplifier IV 16 is grounded, the inverting input end of the operational amplifier IV 16 is connected to the emitter of the triode II 17 through a resistor R1015, the output end of the operational amplifier IV 16 is connected to the base of the triode II 17, one end of the collector of the triode II 17 is connected to a fixed potential through a resistor R1118, the other end of the collector is connected to the non-inverting input end of the operational amplifier V19, the output end of the operational amplifier V19 is connected to the gate of the MOS transistor II 22 through a resistor R1220, the source of the MOS transistor II 22 and the inverting input end of the operational amplifier V19 are connected to the fixed potential through a resistor R. The resistor R58 is connected with the resistor R711, a signal a1 output by the main high-voltage isolation circuit is transmitted into the operational amplifier III 12, and the current passing through the resistor R58 and the resistor R711 is Ia. The resistor R711, the resistor R813 and the operational amplifier III 12 form a proportional operational amplifier, and since the resistor R813 is equal to the resistor R11, a signal a1 in the slave high-voltage isolation circuit I is converted into a through the proportional operational amplifier, and the voltage value of the signal a is equal to that of the signal a in the master high-voltage isolation circuit, so that loop parameters of the master high-voltage isolation circuit and the slave high-voltage isolation circuit I are transmitted. An outer ring output signal a obtained by conversion from the high-voltage isolation circuit I enters the operational amplifier IV 16 through the resistor R914, the resistor R1015 and the operational amplifier IV 16 form a proportional operational amplifier, and the signal a is subjected to the proportional operational amplifier to obtain a branch current IaBranch current IaAmplified by a triode II 17 and then obtained by a resistor R1118 to obtain a voltage signal UR11Voltage signal UR11The voltage value of the non-inverting input end of the operational amplifier V19 is also the same, and the operational amplifier V19 and the MOS tube II 22 form a constant current circuitTherefore, when the operational amplifier V19 reaches steady state, the inverting input terminal of the operational amplifier V19 is equal to the non-inverting input terminal thereof, i.e. the voltage at the upper end of the resistor R1423 is UR11Since the resistor R1118 is equal to the resistor R1423, the current flowing through the resistor R1423 is IaThe current of the branch circuit is equal to that of the input signal a, the MOS tube II 22 works in a saturation region (constant current), IaConverted to signal a2 via resistor R1321. Wherein, the resistor R1118 changes the current signal into a voltage signal, and the resistor R1220 plays a role of current limiting.
As shown in fig. 2, the slave high-voltage isolation circuit ii includes an operational amplifier VI25, an inverting input terminal of which is connected to the resistor R1321 through the resistor R1524, a non-inverting input terminal of which is grounded, and a resistor R1626, one end of which is connected to the inverting input terminal of the operational amplifier VI25, and the other end of which is connected to the output terminal of the operational amplifier VI 25. The resistor R1321 is connected with the resistor R1524, a signal a2 output by the main high-voltage isolation circuit I is transmitted into the operational amplifier VI25, and the current passing through the resistor R1321 and the resistor R1524 is Ia. The resistor 1524, the resistor R1626 and the operational amplifier VI25 form a proportional amplifier, and since the resistor R914 is equal to the resistor R1626, the signal a2 in the high-voltage isolation circuit ii is converted into the signal a through the proportional amplifier. The voltage value of the secondary high-voltage isolation circuit is equal to the voltage value of a in the secondary high-voltage isolation circuit I, and loop parameters of the secondary high-voltage isolation circuit I and the secondary high-voltage isolation circuit II are transferred. And finally realizing the loop parameter transmission of the public outer loop, the slave high-voltage isolation circuit I and the slave high-voltage isolation circuit II through the high-voltage isolation circuit, so that the output signals a of the outer loop can be transmitted to the PI regulating module of the slave module I average current loop and the slave module II average current loop.
As shown in FIG. 5, the loop parameter fine tuning circuit includes an operational amplifier VII 29 and an operational amplifier VIII34, wherein a resistor R1727 has one end connected to the inverting input terminal of the operational amplifier VII 29 and the other end connected to the total voltage sampling signal V1 of the master, slave and slave II power stage circuits after being connected in series, and the amplitude of the total voltage sampling signal is U1V1The resistor R1828 is connected with one end to the inverting input end of the operational amplifier VII 29, and is connected with the other end to the sampling electrode of the slave module I power stage circuit or the slave module II power stage circuitA voltage signal V2 having an amplitude of UV2One end of the resistor R1930 is connected to the inverting input end of the operational amplifier VII 29, the other end is connected to the output end of the operational amplifier VII 29, the non-inverting input end of the operational amplifier VII 29 is grounded, the inverting input end of the operational amplifier VIII34 is connected to the resistor R2031 and the resistor R2132, the other end of the resistor R2031 is connected to the high-voltage isolation circuit I or the high-voltage isolation circuit II, and the amplitude U of the signal aaThe signal enters an operational amplifier VIII34 through a resistor R2031, a capacitor I33 is connected with a resistor R2132 in series, the other end of the capacitor I33 is grounded, the capacitor I33 plays a role in filtering, the output end of the operational amplifier VII 29 is connected between the resistor R2132 and the capacitor I33, the non-inverting input end of the operational amplifier VIII34 is grounded, the output end of the operational amplifier VIII34 is connected with a resistor R2235, one end of a resistor R2336 is connected with the inverting input end of the operational amplifier VIII34, and the other end of the resistor R2336 is connected with the resistor R2235. A resistor R1727, a resistor R1828, a resistor R1930 and an operational amplifier VII 29 form an inverse addition operational amplifier, and V2 and V1 are inversely summed to obtain a loop fine tuning parameter Ud1The resistor R2031, the resistor R2132, the resistor R2336 and the operational amplifier VIII34 form an inverse summation circuit, and the inverse summation circuit is obtained through a formula
Calculating to obtain UV3Which is the average current loop given signal after conversion, is negative when
While, UV3And adjusting the output of the corresponding power stage circuit along with the change of the voltage, and maintaining the voltage sharing of the modules.
Claims (2)
1. The utility model provides a module series connection formula high voltage direct current power supply, including main circuit and control circuit, have main module power level circuit in the main circuit, follow I power level circuit of module and follow II power level circuit of module, have public outer loop in the control circuit, main module average current ring, follow I average current ring of module and follow II average current rings of module, all have current sampling module, PI regulation module and PWM module in main module average current ring, follow I average current ring of module and follow II average current rings of module, its characterized in that:
the positive electrode of the master module I power level circuit is connected with the negative electrode of the slave module I power level circuit, the positive electrode of the slave module I power level circuit is connected with the negative electrode of the slave module II power level circuit, and the master module I power level circuit, the slave module I power level circuit and the slave module II power level circuit are connected in series;
a current sampling module used for collecting the current value of the main module power level circuit in the main module average current loop is connected with a PI (proportional integral) adjusting module in the main module average current loop, the PI adjusting module in the main module average current loop is connected with a PWM (pulse width modulation) module in the main module average current loop, and the PWM module in the main module average current loop is connected with the main module power level circuit;
the current sampling module used for collecting the current value of the slave module I power stage circuit in the slave module I average current ring is connected with the PI adjusting module in the slave module I average current ring, the PI adjusting module in the slave module I average current ring is connected with the PWM module in the slave module I average current ring, and the PWM module in the slave module I average current ring is connected with the slave module I power stage circuit;
a current sampling module used for collecting the current value of the slave module II power level circuit in the slave module II average current ring is connected with a PI (proportional integral) adjusting module in the slave module II average current ring, the PI adjusting module in the slave module II average current ring is connected with a PWM (pulse width modulation) module in the slave module II average current ring, and the PWM module in the slave module II average current ring is connected with the slave module II power level circuit;
the public outer loop is respectively connected with the main high-voltage isolation circuit and the PI adjusting module in the average current loop of the main module group;
the high-voltage isolation circuit I is connected with the master high-voltage isolation circuit, the master high-voltage isolation circuit transmits a constant-current signal after high voltage isolation to the slave high-voltage isolation circuit I, the slave high-voltage isolation circuit I converts the constant-current signal into an outer ring output signal which is the same as a signal sent by a public outer ring, the outer ring output signal and a loop parameter fine tuning circuit obtain signal superposition, and the signal superposition is sent to a PI adjusting module in an average current ring of the slave module I;
the slave high-voltage isolation circuit II is connected to the slave high-voltage isolation circuit I, the slave high-voltage isolation circuit I transmits the constant-current signal after high voltage isolation to the slave high-voltage isolation circuit II, the slave high-voltage isolation circuit II converts the constant-current signal into an outer ring output signal which is the same as a signal sent by a public outer ring circuit, the outer ring output signal and the loop parameter fine tuning circuit obtain signal superposition, and the signal superposition is sent to a PI (proportional integral) adjusting module in an average current ring of the slave module II;
the loop parameter fine tuning circuit is connected with a PI adjusting module in an average current ring of a slave module I and a PI adjusting module in an average current ring of a slave module II, the loop parameter fine tuning circuit makes a difference between total voltage sampling signals of a master module power level circuit, the slave module I power level circuit and the slave module II power level circuit which are connected in series and a voltage sampling signal of the slave module I power level circuit, the difference is subjected to scaling and then summed with an outer ring output signal converted by a slave high-voltage isolating circuit I and then sent to the PI adjusting module in the average current ring of the slave module I, the loop parameter fine tuning circuit is used for connecting the master module power level circuit which is connected in series, the total voltage sampling signals of the slave module I power level circuit and the slave module II power level circuit are subjected to difference with the voltage sampling signal of the slave module II power level circuit, and the difference is subjected to scaling and then summed with an outer ring output signal converted from the high-voltage isolation circuit II and then sent to a PI adjusting module in a slave module II average current ring;
the main high-voltage isolation circuit comprises an operational amplifier I (3), a triode I (4), an operational amplifier II (6) and an MOS (metal oxide semiconductor) tube I (9), wherein a public external loop is connected to the inverting input end of the operational amplifier I (3) through a resistor R1 (1), the non-inverting input end of the operational amplifier I (3) is grounded, the inverting input end of the operational amplifier I (3) is connected to the emitter of the triode I (4) through a resistor R2 (2), the output end of the operational amplifier I (3) is connected to the base of the triode I (4), one end of the collector of the triode I (4) is connected to a fixed potential through a resistor R3 (5), the other end of the collector is connected to the non-inverting input end of the operational amplifier II (6), the output end of the operational amplifier II (6) is connected to the grid of the MOS tube I (9) through a resistor R4 (7), the source of the MOS tube I (9) and the inverting input end of the operational amplifier II, the drain electrode of the MOS transistor I (9) is connected with a resistor R5 (8);
the slave high-voltage isolation circuit I comprises an operational amplifier III (12), an operational amplifier IV (16), a triode II (17), an operational amplifier V (19) and a MOS (metal oxide semiconductor) tube II (22), wherein the inverting input end of the operational amplifier III (12) is connected to a resistor R5 (8) through a resistor R7 (11), the non-inverting input end of the operational amplifier is grounded, one end of a resistor R8 (13) is connected to the inverting input end of the operational amplifier III (12), the other end of the resistor R8 is connected to the output end of the operational amplifier III (12), the output end of the operational amplifier III (12) is connected to the inverting input end of the operational amplifier IV (16) through a resistor R9 (14), the non-inverting input end of the operational amplifier IV (16) is grounded, the inverting input end of the operational amplifier IV (16) is connected to the emitter electrode of the triode II (17) through a resistor R10 (15), one end of a collector of the triode II (17) is connected to a fixed potential through a resistor R11 (18), the other end of the collector is connected to a non-inverting input end of an operational amplifier V (19), an output end of the operational amplifier V (19) is connected to a grid electrode of the MOS tube II (22) through a resistor R12 (20), a source electrode of the MOS tube II (22) and an inverting input end of the operational amplifier V (19) are connected to the fixed potential through a resistor R14 (23), and a drain electrode of the MOS tube II (22) is connected to a resistor R13 (21);
the slave high-voltage isolation circuit II comprises an operational amplifier VI (25), the inverting input end of the operational amplifier VI is connected to a resistor R13 (21) through a resistor R15 (24), the non-inverting input end of the operational amplifier VI is grounded, one end of a resistor R16 (26) is connected to the inverting input end of the operational amplifier VI (25), and the other end of the resistor R16 is connected to the output end of the operational amplifier VI (25).
2. The modular series high voltage dc power supply of claim 1, further comprising: the loop parameter fine tuning circuit comprises an operational amplifier VII (29) and an operational amplifier VIII (34), one end of a resistor R17 (27) is connected to the inverting input end of the operational amplifier VII (29), the other end of the resistor R18 (28) is connected to the inverting input end of the operational amplifier VII (29), the other end of the resistor R6328 is connected to the sampled voltage signal of the master module I power stage circuit, the slave module I power stage circuit and the slave module II power stage circuit after being connected in series, one end of a resistor R19 (30) is connected to the inverting input end of the operational amplifier VII (29), the other end of the resistor R19 is connected to the output end of the operational amplifier VII (29), the non-inverting input end of the operational amplifier VII (29) is grounded, the inverting input end of the operational amplifier VIII (34) is connected to a resistor R20 (31) and a resistor R21 (32), the other end of the resistor R20 (31) is connected with the slave high-voltage isolation circuit I or the slave high-voltage isolation circuit II, the capacitor I (33) is connected with the resistor R21 (32) in series, the other end of the capacitor I (33) is grounded, the output end of the operational amplifier VII (29) is connected between the resistor R21 (32) and the capacitor I (33), the non-inverting input end of the operational amplifier VIII (34) is grounded, the output end of the operational amplifier VIII (34) is connected with one end of the resistor R22 (35), one end of the resistor R23 (36) is connected with the inverting input end of the operational amplifier VIII (34), and the other end of the resistor R22 (35).
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202004680U (en) * | 2011-04-15 | 2011-10-05 | 国网电力科学研究院 | Sine wave inverter parallel system with variable current ratio |
| CN102299657A (en) * | 2011-08-31 | 2011-12-28 | 南京航空航天大学 | Input-series and output-series (ISOS) inverter system and voltage-sharing input and same-phase output control method thereof |
| CN102710000A (en) * | 2012-05-21 | 2012-10-03 | 中国电力科学研究院 | Parallel current sharing circuit of charging module of electric automobile charger |
| EP2347492B1 (en) * | 2008-10-21 | 2015-02-25 | ALSTOM Technology Ltd | System and method for controlling at least one voltage converter with several cells in series |
| CN105207468A (en) * | 2015-09-11 | 2015-12-30 | 哈尔滨工业大学深圳研究生院 | Voltage difference control method of DC/DC converter |
| CN105226949A (en) * | 2015-11-06 | 2016-01-06 | 国网上海市电力公司 | A kind of control method of IPOS changer system |
| CN107634541A (en) * | 2017-10-19 | 2018-01-26 | 天津大学 | Photovoltaic based on IPOS DC boostings collects access system control method for coordinating |
| CN110311368A (en) * | 2019-08-01 | 2019-10-08 | 东南大学 | Photovoltaic DC boosting collects system and its DC voltage stability control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178730B (en) * | 2013-03-26 | 2016-07-06 | 卧龙电气集团股份有限公司 | A kind of high-power paralleling switch power circuit realizing being in harmonious proportion current-sharing |
| CN107612133A (en) * | 2017-10-24 | 2018-01-19 | 长沙捷联飞机维修工程有限公司 | Aviation high-frequency wireless communication system flows redundant power starting with full load system |
-
2019
- 2019-11-07 CN CN201911085678.3A patent/CN110829798B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2347492B1 (en) * | 2008-10-21 | 2015-02-25 | ALSTOM Technology Ltd | System and method for controlling at least one voltage converter with several cells in series |
| CN202004680U (en) * | 2011-04-15 | 2011-10-05 | 国网电力科学研究院 | Sine wave inverter parallel system with variable current ratio |
| CN102299657A (en) * | 2011-08-31 | 2011-12-28 | 南京航空航天大学 | Input-series and output-series (ISOS) inverter system and voltage-sharing input and same-phase output control method thereof |
| CN102710000A (en) * | 2012-05-21 | 2012-10-03 | 中国电力科学研究院 | Parallel current sharing circuit of charging module of electric automobile charger |
| CN105207468A (en) * | 2015-09-11 | 2015-12-30 | 哈尔滨工业大学深圳研究生院 | Voltage difference control method of DC/DC converter |
| CN105226949A (en) * | 2015-11-06 | 2016-01-06 | 国网上海市电力公司 | A kind of control method of IPOS changer system |
| CN107634541A (en) * | 2017-10-19 | 2018-01-26 | 天津大学 | Photovoltaic based on IPOS DC boostings collects access system control method for coordinating |
| CN110311368A (en) * | 2019-08-01 | 2019-10-08 | 东南大学 | Photovoltaic DC boosting collects system and its DC voltage stability control method |
Non-Patent Citations (1)
| Title |
|---|
| "基于滞环电流控制的串联型双Buck逆变器";李陆军，等;《通信电源技术》;20120525;第29卷(第3期);全文 * |
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