WO2018108140A1 - Système d'alimentation électrique modulaire - Google Patents

Système d'alimentation électrique modulaire Download PDF

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Publication number
WO2018108140A1
WO2018108140A1 PCT/CN2017/116351 CN2017116351W WO2018108140A1 WO 2018108140 A1 WO2018108140 A1 WO 2018108140A1 CN 2017116351 W CN2017116351 W CN 2017116351W WO 2018108140 A1 WO2018108140 A1 WO 2018108140A1
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WO
WIPO (PCT)
Prior art keywords
power
bus
converter
sampling
converters
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Application number
PCT/CN2017/116351
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English (en)
Chinese (zh)
Inventor
应建平
王明
黄宵驳
刘军
胡志明
Original Assignee
台达电子企业管理（上海）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN201611191912.7A external-priority patent/CN108206643A/zh
Priority claimed from CN201711319865.4A external-priority patent/CN108233747B/zh
Application filed by 台达电子企业管理（上海）有限公司 filed Critical 台达电子企业管理（上海）有限公司
Priority to EP17881249.1A priority Critical patent/EP3557752A4/fr
Priority to US16/464,882 priority patent/US10924030B2/en
Priority to BR112019012073-4A priority patent/BR112019012073B1/pt
Priority to AU2017376697A priority patent/AU2017376697B2/en
Publication of WO2018108140A1 publication Critical patent/WO2018108140A1/fr

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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/49—Combination of the output voltage waveforms of a plurality of converters

Definitions

  • the present invention relates to the field of power electronics, and in particular to a modular power system.
  • the traditional power unit cascaded topology requires a set of optical fibers, auxiliary power supplies, and local controllers for each power unit, ie, the power converter.
  • This power unit cascaded topology increases with the increase of the voltage level, and the number of power units that need to be cascaded increases, resulting in an increase in the number of optical fibers, auxiliary power supplies, and local controllers.
  • the design is complex, costly, and reduces its reliability.
  • FIG. 1 is a schematic structural view of a three-phase SVG system in the prior art.
  • 2 is a schematic diagram of a more specific three-phase SVG system in the prior art.
  • the SVG system of Figures 1 and 2 includes three phase circuits in which the power cells in each phase are connected in cascade.
  • each phase circuit of the SVG system is formed by cascading a plurality of power units 1.
  • cascade is a common knowledge in the art, that each power cell comprises a first end and the second end T 1 T 2, wherein two adjacent power cell a second terminal T 2 and the other The first end T 1 of one is connected.
  • Each phase circuit of the first power units through a first end of the filter L T 1 are respectively connected to three-phase network U A, U B and U C on the three-phase line, the last one power unit for each phase circuit The second ends are connected to each other.
  • each phase circuit of the SVG system is formed by cascading eight power units P 1 to P 8 .
  • Each power unit includes a first end and a second end as shown in Figure 1, wherein a second end of one of the adjacent two power units is coupled to the first end of the other.
  • the second end of the power unit P 1 and P power unit 2 is connected to a first end
  • a second end of the power unit P and the power unit P is connected to a first end of the 2 3, and so on, a second power unit P 7
  • the terminal is connected to the first end of the power unit P 8 .
  • the first end of the three power units P 1 in the three-phase circuit is connected to the U A , U B and U C phases of the three-phase power grid G through a filter circuit (composed of the inductor L, the resistor R and the capacitor C), wherein the three phases
  • the U A , U B and U C of the grid G are connected to the load R load .
  • the second ends of the three power units P 8 in the three-phase circuit are connected to each other.
  • Four power switching devices 2 are included in each power unit.
  • Each power switching device 2 consists of a power semiconductor switch S and an anti-parallel body diode or external diode D.
  • the collector of the power semiconductor switch S is connected to the cathode of the diode D, and the emitter of the power semiconductor switch S is connected to the anode of the diode D. Since the power semiconductor switch S and an anti-parallel body diode or external diode D are generally used as a whole, for the sake of brevity, the anti-parallel body diode or external diode D will not be separately mentioned in the following description. .
  • the power unit 1 shown in FIG. 1 may be a full bridge (H bridge) circuit, or may be other circuit topologies such as a half bridge circuit, a rectification-inverter circuit, and the like.
  • 3 is a schematic diagram of an H-bridge circuit (topology) in the prior art.
  • a power unit circuit for example an H-bridge, H-bridge circuit shown in Figure 3, comprises a power semiconductor switch S 1 is to S 4 and the DC bus capacitor C B.
  • the first end of the power semiconductor switch S 1 is connected to the positive terminal of the DC bus capacitor C B and the first terminal of the power semiconductor switch S 3 .
  • a second end of the power semiconductor switch S 1 is coupled to the first end of the power semiconductor switch S 4 .
  • the second end of the power semiconductor switch S 4 is connected to the negative terminal of the DC bus capacitor C B and the second terminal of the power semiconductor switch S 2 .
  • a second terminal of the power semiconductor switch S. 3 is connected to a first terminal of the power semiconductor switch S 2.
  • the second end of the power semiconductor switch S 1 serves as a first output of the H-bridge circuit, that is, the first end T 1 of the power unit 1
  • the second end of the power semiconductor switch S 3 serves as a second output of the H-bridge circuit. That is, the second end T 2 of the power unit 1.
  • FIG. 4 is a schematic diagram of a single phase SVG in the prior art.
  • the single-phase SVG includes a charging portion 3, a power portion 4, and a control portion 5.
  • the single phase SVG also includes a plurality of power units 40, each of which includes a first end and a second end as shown in FIG. 1, a first end of one of the adjacent two power units 40 and another The second end is connected.
  • Figure 4 is a conventional cascaded solution for a 25kV single phase SVG.
  • the SVG is cascaded by a plurality of power units to form a phase that is connected to the grid via filters and contactors.
  • Each power unit 40 of the SVG typically employs an H-bridge circuit.
  • Each power unit 40 of the SVG system further includes a DC bus capacitor C B whose connection relationship is as shown in FIG. 4 , wherein the charging portion 3 is used to precharge the DC bus capacitor C B , and the control portion 5 is used to control the power. Part 4 runs.
  • each power unit 40 as a power converter, such as an H-bridge circuit, needs to be separately provided with a set of locals in addition to a main controller 50.
  • the controller 51, the driving circuit 52, the auxiliary power source 53 and the optical fiber 54 are connected in a relationship as shown in FIG. 4.
  • the main controller 50 outputs a main control signal to the local main controller 51, and the local main controller 51 generates a main control signal according to the main control signal.
  • the local control signal of the corresponding power unit is sent to the driving circuit 52.
  • the driving circuit 52 outputs a driving signal according to the local control signal to drive the corresponding power unit to operate.
  • a 25kV single-phase SVG can usually be implemented in the following two schemes.
  • IGBT Insulated Gate Bipolar Transistor
  • the second scheme the power switching device in the H-bridge circuit uses a high-voltage IGBT, such as a 3300V IGBT or even a 6500V IGBT, to increase the voltage level of the single power unit 40.
  • a second scheme can generally be employed. In the second scheme, if the 3300V IGBT is selected, the voltage level of each power unit 40 is doubled compared to the 1700V IGBT scheme, and the number of cascades can be reduced from 55 to 28, local controller 51, fiber 54 and auxiliary power supply. The number and cost of 53 can also be reduced by half.
  • the cost of 3300V IGBT is still high. Under the same current specification, the cost is far more than twice the cost of 1700V IGBT. Therefore, the cost of the second option will far exceed the first option. If a 6500V IGBT is chosen, the cost pressure is even higher.
  • the current cascading scheme using low voltage IGBT power units or the cascading scheme using high voltage IGBT power units has its significant disadvantages.
  • FIG. 5 is a schematic illustration of an HVDC-Light system in the prior art.
  • the HVDC-Light includes a three-phase circuit, and each phase circuit includes an upper half arm and a lower half arm, and the upper half arm and the lower half arm of each phase circuit include a plurality of stages.
  • each power unit 40 also includes a first end and a second end as shown in FIG. 1, a first end of one of the adjacent two power units 40 and a second of the other The terminals are connected, the inductance L of each upper arm is connected to the inductance L of the corresponding lower arm, and the connection points between the two inductors L are respectively connected to the power grid, and the connection relationship is as shown in FIG.
  • Each of the HVDC-Light power units 40 employs a half bridge converter. Each power unit 40 of the HVDC-Light further includes a DC bus capacitor. Each power unit 40 of the HVDC-Light also needs to be connected to a driving circuit 52. The power unit 40 operates according to a driving signal output by the driving circuit 52. In addition to the main controller 50, each power unit 40 also needs to be provided with a local controller 51, an optical fiber 54 and an auxiliary power supply 53, the connection relationship of which is shown in FIG.
  • the sampling circuit for the DC bus voltage needs further consideration and improvement.
  • the power supply mode of the local controller and auxiliary power supply needs further consideration and improvement.
  • a modular power supply system comprising: a main controller configured to output a main control signal; N local controllers, wherein each of the local controllers is Configuring to receive the main control signal to output at least one local control signal; and N power units in one-to-one correspondence with the N local controllers, wherein each of the power units includes a first end and a second end The second end of each of the power units is coupled to the first end of an adjacent one of the power units, each of the power units being configured to include M power converters, each of which is The power converter includes a third end and a fourth end, the fourth end of each of the power converters being coupled to the third end of an adjacent one of the power converters, and the first one The third end of the power converter is the first end of the power unit, and the fourth end of the Mth power converter is the second end of the power unit, each Power converter is configured And operating according to the local control signal output by the corresponding local controller, where N and M are both natural numbers greater than 1,
  • the sampling circuit includes: M DC bus positive terminal samplers, one-to-one correspondence with the M power converters and the M sampling conditioning circuits, wherein the M The DC bus positive-end samplers are respectively configured to be connected at one end to the positive terminal of the corresponding DC bus capacitor of the power converter, and the M DC bus positive-end samplers are respectively configured to connect the corresponding sampling at the other end a first end of the conditioning circuit, the first end of the sampling conditioning circuit receiving a positive DC bus voltage of the power converter; and M DC bus negative terminal samplers, and the M power converters and The M sampling and conditioning circuits are in one-to-one correspondence, wherein the M DC bus negative terminal samplers are respectively configured to connect one end of the corresponding negative terminal of the DC bus capacitor of the power converter, and the M DC bus negative terminals The sampler is configured to connect the other end to the second end of the corresponding sampling conditioning circuit, and the second end of the sampling conditioning circuit receives the negative DC bus voltage of the power converter.
  • the DC bus positive end sampler and the DC bus negative end sampler comprise resistors.
  • the sampling conditioning circuit comprises a single operational amplifier.
  • a modular power supply system comprising: a main controller configured to output a main control signal; N local controllers, wherein each of the local controllers is Configuring to receive the main control signal to output at least one local control signal; and N power units in one-to-one correspondence with the N local controllers, wherein each of the power units includes a first end and a second end The second end of each of the power units is coupled to the first end of an adjacent one of the power units, each of the power units being configured to include M power converters, each of which is The power converter includes a third end and a fourth end, the fourth end of each of the power converters being coupled to the third end of an adjacent one of the power converters, and the first one The third end of the power converter is the first end of the power unit, and the fourth end of the Mth power converter is the second end of the power unit, each Power converter is configured And operating according to the local control signal outputted by the corresponding local controller, wherein N and M are both natural numbers greater
  • the slave power converters are distributed at the main power. Both sides of the converter.
  • the sampling conditioning circuit further includes a sampling reference point, the sampling reference point being disposed at the main power converter.
  • the sampling reference point is disposed at a positive terminal of a DC bus capacitor of the main power converter, or a negative terminal of a DC bus capacitor of the main power converter, or The midpoint of the DC bus capacitance of the main power converter.
  • the main sampling circuit when the number of the main power converters is one and the number of the slave power converters is M-1, the main sampling circuit includes: a main DC bus positive terminal a sampler configured to be connected at one end to a positive terminal of the DC bus capacitor of the main power converter, and at the other end to a first end of the sampling conditioning circuit, the first end of the sampling conditioning circuit receiving the main a positive DC bus voltage of the power converter; and a main DC bus negative terminal sampler configured to have one end connected to the negative terminal of the DC bus capacitor of the main power converter, and the other end connected to the second end of the sampling conditioning circuit
  • the second terminal of the sampling conditioning circuit receives a negative DC bus voltage of the main power converter
  • the slave sampling circuit includes: M-1 slave DC bus positive terminal samplers, and the M-1 One-to-one correspondence from the power converters, wherein the M-1 slave DC bus positive terminal samplers are respectively configured to be connected at one end to the positive terminal of the corresponding DC bus capacitor of the slave power converter, and the
  • the main power converters when the number of the main power converters is two or more, and the number of the slave power converters is two or more, controlling the main power converter at the same position
  • the local control signals are simultaneously turned on and simultaneously turned off by the power semiconductor switches.
  • the main sampling circuit includes: a plurality of main DC bus positive terminal samplers, one-to-one corresponding to the two or more main power converters, wherein the plurality of main DC bus bars
  • the positive end samplers are respectively configured to connect one end of the corresponding positive end of the DC bus capacitor of the main power converter, and the other end is connected together and connected to the first end of the sampling conditioning circuit, the sampling conditioning circuit
  • the first end receives a sum of positive DC bus voltages of the two or more main power converters; and a plurality of main DC bus negative end samplers, one-to-one corresponding to the two or more main power converters, wherein
  • the plurality of main DC bus negative end samplers are respectively configured to be connected at one end to the negative end of the corresponding DC bus capacitor of the main power converter, and the other end is connected together and connected to the second end of the sampling conditioning circuit.
  • the second end of the sampling conditioning circuit receives a sum of negative DC bus voltages of the main power converter
  • the slave sampling circuit includes: a plurality of stream bus positive terminal samplers, and the Two or more slave power converters are in one-to-one correspondence, wherein the plurality of slave DC bus positive-end samplers are respectively configured to connect one end of the corresponding positive terminal of the DC bus capacitor of the slave power converter, and the other ends are connected together And connected to the third end of the sampling conditioning circuit, the third end of the sampling conditioning circuit receives the sum of the positive DC bus voltages of the two upper slave power converters; and the plurality of slave DC bus negative terminals a sampler, in one-to-one correspondence with the two or more slave power converters, wherein the plurality of slave DC bus negative terminal samplers are respectively configured to be connected at one end to a corresponding negative terminal of the DC bus capacitor of the slave power converter The other end is connected together and connected to the fourth end of the sampling conditioning circuit, and the fourth end of the sampling conditioning circuit receives the sum of
  • the DC bus positive end sampler and the DC bus negative end sampler comprise resistors.
  • the sampling conditioning circuit includes a dual operational amplifier.
  • a modular power supply system comprising: a main controller configured to output a main control signal; N local controllers, wherein each of the local controllers is Configuring to receive the main control signal to output at least one local control signal; and N power units in one-to-one correspondence with the N local controllers, wherein each of the power units includes a first end and a second end The second end of each of the power units is coupled to the first end of an adjacent one of the power units, each of the power units being configured to include M power converters, each of which is The power converter includes a third end and a fourth end, the fourth end of each of the power converters being coupled to the third end of an adjacent one of the power converters, and the first one The third end of the power converter is the first end of the power unit, and the fourth end of the Mth power converter is the second end of the power unit, each Power converter is configured Running according to the corresponding local control signal output by the local controller, wherein N and M are both natural numbers greater than 1,
  • each of the power units further includes: M sampling circuits configured to separately acquire a sum of a positive DC bus voltage and a negative DC bus voltage of the power converter, and the power
  • the local controller corresponding to the unit is configured to include a sampling conditioning circuit configured to convert the sum of the sum of the positive DC voltages of the power converter and the negative DC voltage into a digital signal.
  • the sampling conditioning circuit further includes a sampling reference point, and when M is an odd number, the sampling reference point is set at (M+1)/2th of the power converters Or, when M is an even number, the sampling reference point is set at the M/2th or M/2+1th power converter.
  • the sampling reference point is set at a positive terminal of a DC bus capacitor of the (M+1)/2th power converter, or a DC bus capacitor The negative terminal, or the midpoint of the DC bus capacitor.
  • the sampling reference point when M is an even number, is set at a positive terminal of a DC bus capacitor of the M/2th power converter, or a negative terminal of the DC bus capacitor, Or the midpoint of the DC bus capacitor, or the sampling reference point is set at the positive terminal of the DC bus capacitor of the M/2+1th power converter, or the negative terminal of the DC bus capacitor, or the DC bus capacitor point.
  • two mutually connected resistors are connected in parallel across the DC bus capacitor of each of the power converters.
  • the sampling reference point is set at the (M+) 1) / 2 connection points of the resistors at the power converter.
  • the sampling reference point when M is an even number, two mutually connected resistors are connected in parallel across the DC bus capacitor of each of the power converters, and when M is an even number, the sampling reference point a connection point of two of the resistors at the M/2th power converter, or the sampling reference point is set at two (M/2+1)th of the power converters The connection point of the resistor.
  • the sampling circuit includes: M DC bus positive-end samplers, one-to-one corresponding to the M power converters, wherein the M DC bus positive-end samplers respectively a first end of the DC bus capacitor connected to the corresponding power converter, and the other end is connected together and connected to the first end of the sampling conditioning circuit, and the first end of the sampling conditioning circuit receives a sum of positive DC bus voltages of the M power converters; and M DC bus negative terminal samplers, one-to-one corresponding to the M power converters, wherein the M DC bus negative terminal samplers are respectively Configuring one end to connect the negative end of the corresponding DC bus capacitor of the power converter, the other end is connected together and connected to the second end of the sampling conditioning circuit, and the second end receiving end of the sampling conditioning circuit The sum of the negative DC bus voltages of the M power converters.
  • the DC bus positive end sampler and the DC bus negative end sampler comprise resistors.
  • the sampling conditioning circuit comprises a single operational amplifier.
  • the modular power supply system is configured to further include: N auxiliary power sources in one-to-one correspondence with the N local controllers, wherein each of the auxiliary power sources is configured To provide power to the corresponding local controller.
  • the auxiliary power source is powered from an external power source, or the N auxiliary power sources are in one-to-one correspondence with the N power units, and each of the auxiliary power sources is configured to correspond The power unit is powered.
  • the power converter is any one of an AC/DC converter, a DC/AC converter, and a DC/DC converter.
  • the DC bus voltages of the M power converters are all the same, partially identical, or all different.
  • the topologies of the M power converters are all identical, or partially identical.
  • the topology of the M power converters in each of the power units is a full bridge converter, a half bridge converter, and a neutral point controllable three-level conversion.
  • a diode a diode clamped three-level converter, a flying capacitor three-level converter, a full-bridge resonant converter, and a half-bridge resonant converter.
  • the invention can reduce the number of local controllers, optical fibers and auxiliary power sources by simplifying the structure by forming a plurality of power converters into one power unit and using a local controller, an optical fiber, and an auxiliary power source to control multiple power converters. Design, reduce costs and improve reliability.
  • the present invention simplifies the control circuit by sharing a local control signal at the same location of the power semiconductor switches at the same location of the power converters in the power unit.
  • the invention also improves the sampling accuracy of the DC bus voltage.
  • the invention is applicable to the topology of all AC/DC, DC/AC, DC/DC power converter connections and is widely used.
  • FIG. 1 is a schematic structural view of a three-phase SVG system in the prior art
  • FIG. 2 is a schematic diagram of a more specific three-phase SVG system in the prior art
  • FIG. 3 is a schematic diagram of an H-bridge circuit (topology) in the prior art
  • FIG. 4 is a schematic diagram of a single phase SVG in the prior art
  • FIG. 5 is a schematic diagram of an HVDC-Light system in the prior art
  • FIG. 6 is a block diagram of a modular power supply system in accordance with one embodiment of the present invention.
  • FIG. 7 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 8 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 9 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 10 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 11 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 12 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 13 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 14 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 15 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 16 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 17 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 18 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 19 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 20 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • 21 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 22 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 23 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 24 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 25 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 26 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 27 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 28 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 29 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 30 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 31 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 32 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 33 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 34 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 35 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 36 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 37 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 38 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 39 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 40 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 6 is a block diagram of a modular power system in accordance with one embodiment of the present invention.
  • the power electronic converter of the present invention is configured to include: a main controller 90, N local controllers 91, N auxiliary power sources 93, and N power units 70, where N is greater than one. Natural number.
  • the main controller 90 is configured to output a main control signal.
  • the primary control signal is, for example, one or more parameters that are set to control the overall operational state of the modular power system.
  • Each local controller 91 is configured to receive the aforementioned primary control signal to output at least one local control signal.
  • the local control signal is, for example, one or more parameters that are set to control the overall operational state of the corresponding power unit 70, or a local control signal is used to control the operational state of a portion of the power converters in the corresponding power unit 70.
  • N auxiliary power sources 93 are in one-to-one correspondence with N local controllers 91, each of which is configured to provide power to a corresponding local controller 91.
  • each of the power unit 70 includes a first end and a second end X 1 X 2, each of the second end of the power unit 70 is connected to the adjacent X 2
  • the first end X 1 of one power unit 70, that is, the second end X 2 of one of the adjacent two power units 70 is coupled to the first end X 1 of the other.
  • Each power unit 70 is configured to include M power converters 701, each of which includes a third end X 3 and a fourth end X 4 , each of which is coupled to a fourth end X 4 o a third terminal 701 of power converter X 3. That is, the fourth end X 4 of one of the adjacent two power converters 701 is connected to the third end X 3 of the other. M is a natural number greater than one. Thus, the third end X 3 of the first power converter 701 is the first end X 1 of the power unit 70, and the fourth end X 4 of the Mth power converter 701 is the second end of the power unit 70. X 2.
  • Each power converter 701 is configured to operate in accordance with a local control signal output by a corresponding local controller 91.
  • the aforementioned main control signal can be transmitted between the main controller 90 and each of the local controllers 91 via an optical isolation device, such as an optical fiber 94.
  • an optical isolation device such as an optical fiber 94.
  • the main controller 90 and each local controller 91 can be connected by a magnetic isolation device, such as an isolation transformer, and the connection between the main controller 90 and each local controller 91 is not only Limited to the above connection method.
  • the power electronic device of the present invention can be applied to fields such as SVG, MVD, HVDC-Light, and wind power generation systems.
  • the present invention proposes to synthesize M power converters 701 into one power unit 70.
  • One power unit 70 is provided with a local controller 91, an optical fiber 94 and an auxiliary power source 93, that is, a set of local controllers 91.
  • the fiber 94 and the auxiliary power source 93 control the M power converters 701.
  • each power unit 40 that is, the power converter
  • the modular power supply system proposed by the present invention needs to be configured.
  • the number of local controllers 91, fibers 94, and auxiliary power supplies 93 will be reduced to 1/M of the conventional solution.
  • the invention greatly simplifies the structural design of the modular power supply system, and the cost is also significantly reduced, and the reliability is greatly improved.
  • the present invention does not limit the DC bus voltage of each power converter 701.
  • the DC bus voltages of the M power converters 701 in the modular power supply system of the present invention may all be the same, partially identical, or all different.
  • Figure 7 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the present invention also does not limit the topology used in each power converter 701.
  • the M power converters 701 in the modular power system of the present invention may be in an AC/DC converter, a DC/AC converter, and a DC/DC converter. Either of these, the power converter 701 in Figure 7 represents any of all applicable AC/DC, DC/AC, and DC/DC topologies.
  • the present invention does not limit the topology used in the M power converters 701.
  • the topology of the M power converters may be all the same, or partially identical.
  • the topology of the M power converters 701 in each power unit 70 of the modular power supply system of the present invention may all be a full bridge converter, a half bridge converter, and a neutral point controllable three level converter.
  • the topology of the M power converters 701 in each power unit 70 in the modular power system of the present invention may be a full bridge converter, a half bridge converter, a neutral point controllable three level converter A combination of two or more of a diode clamped three-level converter, a flying capacitor three-level converter, a full-bridge resonant converter, and a half-bridge resonant converter.
  • each power unit 70 in the modular power supply system of the present embodiment may include: M driving circuits 702, which are in one-to-one correspondence with M power converters 701, wherein each driving circuit 702 is configured to be connected to a power semiconductor switch in the corresponding power converter 701, receive and according to at least one local control signal output by the corresponding local controller 91, to output at least one driving signal to drive the corresponding M power converters
  • the power semiconductor switch in 701 is turned on and off.
  • each power unit in the modular power system can include: a plurality of drive circuits, the number of the plurality of drive circuits being equal to the number of power semiconductor switches in the power unit, each drive circuit being configured to be a sexual connection And corresponding to the power semiconductor switch, receiving and outputting a driving signal according to the corresponding local control signal to drive the corresponding power semiconductor switch to be turned on and off.
  • FIG. 8 is a block diagram of a modular power system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a full bridge converter, such as an H bridge circuit.
  • Each H-bridge circuit 701 includes four power semiconductor switches and a DC bus capacitor, and four power semiconductor switches form two bridge arms.
  • four power semiconductor switches are respectively defined as an upper power semiconductor switch of a bridge arm, a lower power semiconductor switch, an upper power semiconductor switch of the other bridge arm, and a lower power semiconductor switch, wherein one end of the upper power semiconductor switch of one of the bridge arms is connected to one end of the upper power semiconductor switch of the other bridge arm and one end of the DC bus capacitor, The other end of the lower power semiconductor switch of one bridge arm is connected to the other end of the lower power semiconductor switch of the other bridge arm and the other end of the DC bus capacitor, and the upper power semiconductor switch of one bridge arm and the lower power semiconductor switch are connected to the third end X 3 , the upper power semiconductor switch of the other bridge arm and the lower power semiconductor switch are connected to the fourth end X 4 .
  • the power converter 701 includes two bridge arms and a DC bus capacitor, and one end of the upper power semiconductor switch Q M1 of one bridge arm is connected to the upper power semiconductor switch Q M3 of the other bridge arm.
  • One end and one end of the DC bus capacitor C B , the other end of the lower power semiconductor switch Q M2 of one bridge arm is connected to the other end of the lower power semiconductor switch Q M4 of the other bridge arm and the other end of the DC bus capacitor C B
  • one The connection point between the upper power semiconductor switch Q M1 of the bridge arm and the lower power semiconductor switch Q M2 is the third end X 3
  • the connection point of the upper power semiconductor switch Q M3 of the other bridge arm and the lower power semiconductor switch Q M4 is the fourth End X 4 .
  • each of the power unit 70 of an H-bridge circuit 701 of the third terminal X 3 for the power unit of the first end 70 of the X 1 the first H-bridge circuit 701 a fourth terminal X 4 is connected to the third end X 3 of the second H-bridge circuit 701, and so on, the fourth end X 4 of the M-1th H-bridge circuit 701 is connected to the third end X 3 of the M-th H-bridge circuit 701,
  • the fourth end X 4 of the Mth power converter is the second end X 2 of the power unit 70.
  • the local controller 91 corresponding to each power unit 70 outputs at least one local control signal for controlling the turning on and off of the power semiconductor switches in the corresponding H-bridge circuit 701.
  • each H-bridge circuit 701 requires four local control signals to respectively control the corresponding power semiconductor switches to be turned on and off, and each power unit 70 requires 4 ⁇ M local control signals, that is, local control.
  • the device needs to output 4 ⁇ M local control signals for controlling the on and off of the corresponding power semiconductor switches, that is, the power semiconductor switches Q 11 -Q M4 all need a corresponding local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M H-bridge circuits 701.
  • Each driving circuit 702 receives a corresponding local control signal and outputs at least one driving. The signals respectively drive the on and off of the corresponding power semiconductor switches.
  • each of the driving circuits 702 receives the corresponding four local control signals, and outputs four driving signals to respectively drive the corresponding power semiconductor switches.
  • the driving circuit 702 corresponding to the first H-bridge circuit 701 is taken as an example, and the driving circuit outputs four driving signals for driving the power semiconductor switches Q 11 -Q 14 to be turned on and off, respectively.
  • each power unit 70 further includes a plurality of driving circuits, the number of driving circuits is equal to 4 ⁇ M, each driving circuit is connected to a corresponding one of the power semiconductor switches, and receives a corresponding local control signal for output.
  • a driving signal drives the turn-on and turn-off of the corresponding power semiconductor switch.
  • FIG. 9 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a half bridge converter.
  • Each of the half bridge converters 701 includes two power semiconductor switches and a DC bus capacitor, the connection relationship of which is as shown in FIG. One end of a power semiconductor is connected to one end of the DC bus capacitor, the other end is connected to one end of another power semiconductor switch, and the other end of the other power semiconductor switch is connected to the other end of the DC bus capacitor C B .
  • the power converter 701 includes two power semiconductor switches Q 11 , Q 12 and a DC bus capacitor C B .
  • the power semiconductor switch end Q at one end 11 is connected to the DC bus capacitor C B, the power semiconductor switch and the other end Q 11 is connected to the power semiconductor switch end Q 12 is, the power semiconductor switch and the other end Q 12 is connected to the DC bus capacitor C B
  • the connection point of the power semiconductor switch Q 11 and the power semiconductor switch Q 12 is the third end X 3 of the first power converter 701
  • the other end of the power semiconductor switch Q 12 is the first power converter 701. Fourth end X 4 .
  • the third end X 3 of the first half bridge converter in each power unit 70 is the first end X 1 of the power unit 70, and the fourth end X 4 of the first half bridge converter is connected.
  • the third end X 3 of the second half bridge converter, and so on, the fourth end X 4 of the M-1 half bridge converter is connected to the third end X 3 of the Mth half bridge converter, the Mth
  • the fourth end X 4 of the half bridge converter is the second end X 2 of the power unit 70.
  • the local controller corresponding to each power unit 70 can output 2 ⁇ M local control signals for controlling the turning on and off of the power semiconductor switches Q 11 -Q M2 in the half bridge converter 701. That is, both the power semiconductor switches Q 11 -Q M2 require a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M half-bridge converters 701.
  • Each driving circuit 702 receives a corresponding local control signal and outputs at least one.
  • the driving signals respectively drive the turning on and off of the corresponding power semiconductor switches.
  • each driving circuit 702 receives the corresponding two local control signals, and outputs two driving signals to respectively drive the corresponding power semiconductor switches. Turning on and off, taking the driving circuit 702 corresponding to the first half-bridge converter 701 as an example, the driving circuit outputs two driving signals to drive the power semiconductor switches Q 11 -Q 12 to be turned on and off, respectively.
  • each power unit 70 further includes a plurality of driving circuits, the number of driving circuits being equal to 2 ⁇ M, each driving circuit is electrically connected to a corresponding one of the power semiconductor switches, and receiving a corresponding local control signal to A driving signal is output to drive the corresponding power semiconductor switch to be turned on and off.
  • the two driving circuits are respectively connected to the power semiconductor switch Q 11 -Q 12 and each of the drive circuits outputs a drive signal to drive the on and off of the corresponding power semiconductor switches Q 11 -Q 12 .
  • FIG. 10 is a block diagram of a modular power system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a neutral point controllable three-level converter.
  • Each of the neutral point controllable three-level converters 701 includes eight power semiconductor switches and two DC bus capacitors, the connection relationship of which is shown in FIG. Taking the first power converter 701 as an example, one end of the power semiconductor switch Q 11 is connected to one end of the DC bus capacitor C 1 and one end of the power semiconductor switch Q 15 , and the other end of the DC bus capacitor C 1 is connected to the DC bus .
  • the power semiconductor switches 2 Q 11 and the other end is connected to one end of the power semiconductor switch Q 12, Q 11 and the power semiconductor switch of the power semiconductor switch Q is connected to a first point 12 to a third terminal 701 of the power converter X 3 , the other end of the power semiconductor switch Q 12 is connected to the other end of the DC bus capacitor C 2 and the other end of the power semiconductor switch Q 16 , and the other end of the power semiconductor switch Q 15 is connected to one end of the power semiconductor switch Q 16 , the power Q semiconductor switch 15 and the power semiconductor switch 16 is connected to the point Q 1 a first terminal 701 of the power converter of the fourth X 4, Q 13 is an end of the power semiconductor switch is connected to the other end of the DC bus capacitor C 1, the power semiconductor switches Q the other end 13 is connected to one end of the power semiconductor switch Q 14, the other end of the power semiconductor switch Q 14 connected to the other end of the power semiconductor switch Q 11, the work Of the semiconductor switch end Q. 17 is connected to the other end of the DC bus capacitor C 1, the power semiconductor
  • the third end X 3 of the first neutral point controllable three-level converter in each power unit 70 is the first end X 1 of the power unit 70, and the first neutral point is controllable.
  • three-level converter is connected to a fourth end of the second X 4 controllable neutral point of three-level converter to the third terminal X 3, and so on, the M-1 first controllable three-level neutral point inverter
  • the fourth end X 4 is connected to the third end X 3 of the Mth neutral point controllable three-level converter, and the fourth end X 4 of the Mth neutral point controllable three-level converter is the power unit 70 The second end of X 2 .
  • the local controller corresponding to each power unit can output 8 ⁇ M local control signals for controlling the power semiconductor switches Q 11 -Q M8 in the neutral point controllable three-level converter 701. Turning on and off, that is, both power semiconductor switches Q 11 -Q M8 require a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M neutral point controllable three-level converters 701, and each driving circuit 702 receives corresponding local control. And outputting at least one driving signal to respectively drive on and off of the corresponding power semiconductor switch.
  • each driving circuit 702 receives corresponding 8 local control signals, and outputs 8 driving signals to respectively drive
  • the driving circuit 702 corresponding to the first neutral point controllable three-level converter 701 is taken as an example, and the driving circuit outputs eight driving signals to respectively drive the power semiconductor switch Q. 11 - Q 18 is turned on and off.
  • each power unit 70 further includes a plurality of driving circuits, the number of driving circuits is equal to 8 ⁇ M, each driving circuit is connected to a corresponding one of the power semiconductor switches, and receives a corresponding local control signal to output one.
  • the driving signal drives the corresponding power semiconductor switch to be turned on and off.
  • the eight driving circuits corresponding to the first neutral point controllable three-level converter 701 are taken as an example, and the eight driving circuits are respectively connected to the power semiconductor switch.
  • Q 11 - Q 18 and each drive circuit outputs a drive signal to drive the corresponding power semiconductor switches Q 11 - Q 18 on and off.
  • FIG. 11 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a diode clamped three-level converter.
  • Each of the diode clamped three-level converters 701 includes eight power semiconductor switches, four clamp diodes, and two DC bus capacitors, the connection relationship of which is shown in FIG.
  • one end of the power semiconductor switch Q 11 is connected to one end of the DC bus capacitor C 1 and one end of the power semiconductor switch Q 15 , and the other end of the power semiconductor switch Q 11 is connected to the power semiconductor switch Q one end of the cathode 12 and the clamp diode D 1, the other end of the power semiconductor switch Q 12 connected to one end of the power semiconductor switch 13 is Q, and the other end of the power semiconductor switch Q 13 is connected to the power semiconductor switch Q and one end of the clamp 14
  • the anode of the diode D 2 , the other end of the DC bus capacitor C 1 is connected to one end of the DC bus capacitor C 2 , and the other end of the power semiconductor switch Q 14 is connected to the other end of the DC bus capacitor C 2 , and the anode of the clamp diode D 1 Connected to the cathode of the clamp diode D 2 and the other end of the DC bus capacitor C 1 , the connection point of the power semiconductor switch Q 12 and the power semiconductor switch Q 13 is the
  • the other end of the power semiconductor switch. 17 Q is connected to the power semiconductor switch Q and one end of the clamp diode D 18 of the anode 4, the other end of the power semiconductor switch Q 18 is connected to the DC bus capacitor C another 2
  • the anode of the clamp diode D 3 is connected to the cathode of the clamp diode D 4 and the other end of the DC bus capacitor C 1
  • the connection point of the power semiconductor switch Q 16 and the power semiconductor switch Q 17 is the first power converter 701
  • the fourth end of the X 4 is the fourth end of the X 4 .
  • the third end X 3 of the first diode clamped three-level converter in each power unit 70 is the first end X 1 of the power unit 70, and the first diode clamps three-level conversion.
  • the fourth end X 4 of the device is connected to the third end X 3 of the second diode clamp three-level converter, and so on, and the fourth end of the M-1 diode clamp three-level converter is connected by X 4
  • the third end X 3 of the M diode clamped three-level converter, the fourth end X 4 of the Mth diode clamped three level converter is the second end X 2 of the power unit 70.
  • the local controller corresponding to each power unit can output 8 ⁇ M local control signals for controlling the power semiconductor switches Q 11 -Q M8 in the neutral point controllable three-level converter 701. Turning on and off, that is, both power semiconductor switches Q 11 -Q M8 require a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M diode-clamped three-level converters 701, and each driving circuit 702 receives a corresponding local control signal. And outputting at least one driving signal to respectively drive on and off of the corresponding power semiconductor switch.
  • each driving circuit 702 receives corresponding eight local control signals, and outputs eight driving signals to respectively drive corresponding ones.
  • the driving circuit 702 corresponding to the first diode clamped three-level converter 701 is used as an example.
  • the driving circuit outputs eight driving signals to respectively drive the power semiconductor switches Q 11 -Q 18 . Turn on and off.
  • each power unit 70 further includes a plurality of driving circuits, the number of driving circuits is equal to 8 ⁇ M, each driving circuit is connected to a corresponding one of the power semiconductor switches, and receives a corresponding local control signal to output one.
  • the driving signal drives the corresponding power semiconductor switch to be turned on and off.
  • the eight driving circuits corresponding to the first diode clamped three-level converter 701 are taken as an example, and the eight driving circuits are respectively connected to the power semiconductor switch Q 11 . -Q 18 and each of the drive circuits outputs a drive signal to drive the on and off of the corresponding power semiconductor switches Q 11 -Q 18 .
  • FIG. 12 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a flying capacitor three-level converter.
  • Each of the flying capacitor three-level converters 701 includes eight power semiconductor switches, two DC bus capacitors, and two flying capacitors, the connection relationship of which is shown in FIG.
  • one end of the power semiconductor switch Q 11 is connected to one end of the DC bus capacitor C 1 and one end of the power semiconductor switch Q 15 , and the other end of the power semiconductor switch Q 11 is connected to the power semiconductor switch Q and one end of the flying capacitor C 12 at one end, the power semiconductor 3 switches the other end Q 12 is connected to the power semiconductor switch end Q 13 is, the power semiconductor switch and the other end Q 13 is connected to the power semiconductor switch Q and one end of the fly 14 cross the other end of capacitor C 3, the other end of the DC bus capacitor C.
  • the power semiconductor switch Q 16 Q is connected to the power semiconductor switch 17 as a first point of a power converter 701 Fourth end X 4 .
  • the third end X 3 of the first flying capacitor three-level converter in each power unit 70 is the first end X 1 of the power unit 70, and the first flying capacitor three-level conversion
  • the fourth end X 4 of the device is connected to the third end X 3 of the second flying capacitor three-level converter, and so on, and the fourth end X 4 of the M-1 flying capacitor three-level converter is connected.
  • M-th three-level flying capacitor inverter X 4 is a fourth end of the power unit of the second end 70 of X 2.
  • the local controller corresponding to each power unit can output 8 ⁇ M local control signals for controlling the power semiconductor switches Q 11 -Q M8 in the neutral point controllable three-level converter 701. turned on and off, i.e., the power semiconductor switch Q 11 -Q M8 require a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M flying capacitor three-level converters 701, and each driving circuit 702 receives a corresponding local control signal. And outputting at least one driving signal to respectively drive on and off of the corresponding power semiconductor switch.
  • each driving circuit 702 receives corresponding eight local control signals, and outputs eight driving signals to respectively drive corresponding ones.
  • the driving circuit 702 corresponding to the first flying capacitor three-level converter 701 is used to drive the power semiconductor switch Q 11 -Q 18 respectively. Turn on and off.
  • each power unit 70 further includes a plurality of driving circuits.
  • the number of driving circuits is equal to 8 ⁇ M.
  • Each driving circuit receives a corresponding local control signal and outputs a driving signal to drive the corresponding power semiconductor switch.
  • eight driving circuits corresponding to the first flying capacitor three-level converter 701 are connected, and eight driving circuits are respectively connected to the power semiconductor switches Q 11 - Q 18 and each driving circuit outputs a corresponding drive signal to the power semiconductor switch Q 11 -Q 18 is turned on and off.
  • the M power converters 701 in the modular power supply system of FIGS. 8-12 may be an AC/DC converter or a DC/AC converter, but not limited thereto. It can be a converter of other topology.
  • FIG. 13 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a full bridge resonant converter.
  • Each of the full-bridge resonant converters 701 includes a full-bridge circuit, a resonant circuit, a transformer, and a rectifier bridge, the connection relationship of which is as shown in FIG.
  • the full bridge circuit comprising four power semiconductor switch and a DC bus capacitor, one end of the power semiconductor switch Q 11 connected to the DC bus capacitor C B 'and one end of the power semiconductor switches Q
  • One end 13 of the power semiconductor switch and the other end Q 11 is connected to the power semiconductor switch end Q 12 of the power semiconductor switch and the other end Q 12 is connected to the DC bus capacitor C B 'and the other end of the power semiconductor switch and the other end Q 14 of
  • the connection point of the power semiconductor switch Q 11 and the power semiconductor switch Q 12 is connected to one end of the resonant circuit formed by the capacitor C' and the inductor L', and the other end of the resonant circuit is connected to one end of the primary coil of the transformer T', and the transformer T
  • the other end of the primary coil is connected to the connection point of the power semiconductor switch Q 13 and the power semiconductor switch Q 14 , and the aforementioned end of the DC bus capacitor C B ' is the third end X 3 of the first power converter, the
  • the third end X 3 of the first full bridge resonant converter in each power unit 70 is the first end X 1 of the power unit 70 and the fourth end X 4 of the first full bridge resonant converter Connecting the third end X 3 of the second full-bridge resonant converter, and so on, the fourth end X 4 of the M-1 full-bridge resonant converter is connected to the third end X 3 of the M-th full-bridge resonant converter
  • the fourth end X 4 of the Mth full-bridge resonant converter is the second end X 2 of the power unit 70.
  • the fifth end X 5 of all of the full bridge resonant converters in each power unit 70 are connected together, and the sixth end X 6 is connected together.
  • the local controller corresponding to each power unit can output 4 ⁇ M local control signals for controlling the turn-on and turn-off of the power semiconductor switches Q 11 -Q M4 in the full-bridge resonant converter 701. That is, the power semiconductor switches Q 11 -Q M4 each require a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M full-bridge resonant converters 701.
  • Each driving circuit 702 receives a corresponding local control signal and outputs at least a driving signal respectively driving the corresponding power semiconductor switches to be turned on and off.
  • each driving circuit 702 receives corresponding four local control signals, and outputs four driving signals to respectively drive corresponding power semiconductor switches. the turned on and off, the drive circuit 702 to a first full-bridge resonant converter 701 corresponding to an example, the driving circuit 4 outputs the driving signals driving the power semiconductor switch Q 11 -Q 14 is turned on and off .
  • each power unit 70 further includes a plurality of driving circuits, the number of driving circuits is equal to 4 ⁇ M, each driving circuit is connected to a corresponding one of the power semiconductor switches, and receives a corresponding local control signal to output one.
  • the driving signal drives the corresponding power semiconductor switch to be turned on and off.
  • the four driving circuits are respectively connected to the power semiconductor switch Q 11 -Q 14 .
  • each of the driving circuits outputs a driving signal to drive the on and off of the corresponding power semiconductor switches Q 11 -Q 14 .
  • FIG. 14 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a half bridge resonant converter.
  • Each of the half-bridge resonant converters 701 includes a half bridge circuit, a resonant circuit, a transformer, and a rectifier bridge, the connection relationship of which is as shown in FIG.
  • the half-bridge circuit includes two power semiconductor switches and one DC bus capacitor.
  • One end of the power semiconductor switch Q 11 is connected to one end of the DC bus capacitor C B ', and the power semiconductor switch Q the other end 11 is connected to the power semiconductor switch end Q 12, the power semiconductor switch other ends Q 12 is connected to the DC bus capacitor C B ', the power semiconductor switch Q 11 of the power semiconductor switch Q is connected to the point 12 is connected to the 'One end of the primary coil of the transformer T''L and the inductance' end of the resonance circuit composed of the other end of the resonance circuit of the capacitor C is connected to the transformer T, the other end of the primary coil is connected to the power semiconductor switch of another Q 12 of At one end, one end of the DC bus capacitor C B ' is the third end X 3 of the first power converter, and the other end of the DC bus capacitor C B ' is the fourth end X 4 of the first power converter, and the rectifier bridge includes four rectifying diodes, the rectifying diode D 1 'is connected to one end of the rectifying diode D 3' end, a rectifying diode D 1
  • the third end X 3 of the first half-bridge resonant converter in each power unit 70 is the first end X 1 of the power unit 70, and the fourth end X of the first half-bridge resonant converter 4 half-bridge resonant converter connected to the second terminal of the third X 3, and so on, the fourth terminal 4 is connected to the M-X half-bridge resonant converter of a third terminal of the first X M-1 half-bridge resonant converter 3.
  • the fourth end X 4 of the Mth half-bridge resonant converter is the second end X 2 of the power unit 70.
  • the fifth ends X 5 of all of the half-bridge resonant converters in each power unit 70 are connected together, and the sixth ends X 6 are connected together.
  • the local controller corresponding to each power unit can output 2 ⁇ M local control signals for controlling the turn-on and turn-off of the power semiconductor switches Q 11 -Q M2 in the half-bridge resonant converter 701. That is, both the power semiconductor switches Q 11 -Q M2 require a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M half-bridge resonant converters 701.
  • Each driving circuit 702 receives a corresponding local control signal and outputs at least a driving signal respectively driving on and off of the corresponding power semiconductor switch, specifically, each driving circuit 702 receives corresponding two local control signals, and outputs two driving signals to respectively drive corresponding power semiconductor switches
  • the driving circuit 702 corresponding to the first half-bridge resonant converter 701 outputs two driving signals for driving the power semiconductor switches Q 11 -Q 12 to be turned on and off. .
  • each power unit 70 further includes a plurality of driving circuits, the number of driving circuits is equal to 2 ⁇ M, each driving circuit is connected to a corresponding one of the power semiconductor switches, and receives a corresponding local control signal and outputs one.
  • the driving signal drives the turn-on and turn-off of the corresponding power semiconductor switch.
  • the two driving circuits are respectively connected to the power semiconductor switch Q 11 -Q 12 And each of the driving circuits outputs a driving signal to drive the on and off of the corresponding power semiconductor switches Q 11 -Q 12 .
  • the M power converters 701 in the modular power supply system of FIG. 13 and FIG. 14 may be DC/DC converters, but not limited thereto, and may be converters of other topologies.
  • FIG. 15 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment employs a combination of a full bridge converter and a half bridge converter.
  • Each of the full bridge converter power converters 7011' includes four power semiconductor switches, each of which includes two power semiconductor switches, the connection relationship of which is shown in FIG.
  • the specific connection relationship of the full bridge converter is as shown in FIG. 8
  • the specific connection relationship of the half bridge converter is shown in FIG. 9 , and details are not described herein again.
  • the third end X 3 of the first power converter 701 is the first end X 1 of the power unit 70
  • the fourth end X 4 of the first power converter 701 is connected to the second power converter 701.
  • the third end X 3 , and so on, the fourth end X 4 of the M-1th power converter 701 is connected to the third end X 3 of the Mth power converter 701, and the fourth end of the Mth power converter 701 X 4 is the second end X 2 of the power unit 70.
  • the number of local control signals output by the local controller corresponding to each power unit 70 is equal to the number of power semiconductor switches in the power unit 70.
  • These local control signals respectively control the full bridge converter and the half bridge converter 701.
  • the power semiconductor switches are turned on and off, that is, each power semiconductor switch requires a local control signal.
  • each power unit 70 further includes M driving circuits 702.
  • the driving circuit 702 is in one-to-one correspondence with M power converters 7011' and 7012', and each driving circuit 702 receives a corresponding local control signal, and And outputting at least one driving signal to respectively drive on and off of the corresponding power semiconductor switch.
  • the driving circuit 702 corresponding to the power converter 7011 ′ receives the corresponding four local control signals, and outputs four driving signals.
  • Driving the corresponding power semiconductor switch to turn on and off respectively, the corresponding driving circuit 702 of the power converter 7012' receives the corresponding two local control signals, and outputs two driving signals to respectively drive the corresponding power semiconductor switches to be turned on. And disconnected.
  • each power unit 70 further includes a plurality of driving circuits.
  • the number of driving circuits in the power unit is equal to the number of power semiconductor switches in the corresponding power unit, and each driving circuit is connected to a corresponding one of the power semiconductor switches.
  • receiving a corresponding local control signal to output a driving signal to drive the corresponding power semiconductor switch to turn on and off taking the four driving circuits corresponding to the power converter 7011' as an example, the four driving circuits are respectively connected to correspond
  • the power semiconductor switches and each of the driving circuits output a driving signal to drive the corresponding power semiconductor switches to be turned on and off, and the two driving circuits corresponding to the power converter 7012' are taken as an example, and the two driving circuits are respectively connected.
  • Corresponding power semiconductor switches and each drive circuit outputs a drive signal to drive the corresponding power semiconductor switches on and off.
  • FIG. 15 only shows the topology of the M power converters 701 of each power unit 70 in the modular power supply system of the present embodiment, a combination of a full bridge converter and a half bridge converter is employed.
  • the present invention is not limited thereto.
  • the topology of the M power converters 701 in each of the power units 70 in the modular power supply system of the present invention may be a full bridge converter, a half bridge converter, or the like.
  • the power converter 701 employing the same topology may employ a "common drive.”
  • shared drive is meant that the power semiconductor switches at the same location of each power converter 701 (or 7011' or 7012') employing the same topology can be controlled using the same local control signal.
  • standard position is meant the position of the logically corresponding power semiconductor switch in the respective power converters 701 of the same topology (or 7011' or 7012') in the circuit diagram.
  • the power semiconductor switches Q 11 , Q 21 ... Q M1 in the power converters 701 of the same topology in FIGS. 6-15 have the same position, and Q 12 , Q 22 ...
  • FIG. 16 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 16 is an illustration of a power unit 70 based on Figure 8 and corresponding to Figure 8.
  • the topology of each power converter 701 of the same power unit 70 is a full bridge converter, such as an H bridge circuit.
  • the H-bridge circuit includes two bridge arms.
  • one bridge arm of the M-th H-bridge circuit includes an upper power semiconductor switch Q M1 and a lower power semiconductor switch Q M2 , and the other bridge arm
  • the upper power semiconductor switch Q M3 and the lower power semiconductor switch Q M4 are included .
  • connection point of the upper power semiconductor switch Q M1 and the lower power semiconductor switch Q M2 is the third output terminal X 3 of the Mth power converter 401.
  • connection point of the upper power semiconductor switch Q M3 and the lower power semiconductor switch Q M4 is the fourth output terminal X 4 of the Mth power converter 401.
  • the third output terminal X 3 of one of the adjacent two power converters 701 is sequentially connected to the fourth output terminal X 4 of the other one.
  • the third output terminal X 3 of the first H-bridge circuit is the first terminal X 1 of the power unit 70, and the fourth output terminal X 4 of the first H-bridge circuit and the second H-bridge circuit
  • the three output terminals X 3 are connected in turn, and the fourth output terminal X 4 of the M-1th H-bridge circuit is connected to the third output terminal X 3 of the M-th H-bridge circuit, and the M-th H-bridge circuit is connected.
  • the four output terminal X 4 is the second terminal X 2 of the power unit 70.
  • the local controller 91 outputs four local control signals.
  • Each H-bridge circuit corresponds to a drive circuit 702.
  • Each of the driving circuits 702 is coupled to the local controller 91, and is connected to the control terminals of the corresponding upper power semiconductor switch and the lower power semiconductor switch for receiving the above four local control signals output by the local controller 91, and is localized.
  • the control signals are processed to produce respective four drive signals.
  • the generated four drive signals Y M1 , Y M2 , Y M3 , and Y M4 are output to the control terminals of the upper power semiconductor switches Q M1 and Q M3 and the lower power semiconductor switches Q M2 and Q M4 in the Mth H-bridge circuit, It is used to drive the on and off of the upper power semiconductor switches Q M1 and Q M3 and the lower power semiconductor switches Q M2 and Q M4 .
  • the local control signals corresponding to the power semiconductor switches of the same position of each H-bridge circuit are the same, for example, the upper power semiconductor switch Q 11 and the second H-bridge circuit of the first H-bridge circuit.
  • the upper power semiconductor switch Q 21 and so on, until the local control signal corresponding to the upper power semiconductor switch Q M1 of the Mth H-bridge circuit is the same, that is, the same local control signal, that is, the driving circuit 702 outputs the corresponding driving signal Y 11 , Y 21 ... same Y M1, so that the power semiconductor switches Q 11, Q 21 ... Q M1 simultaneously turned on and turned off simultaneously.
  • each power converter 701 in the power unit 70 in this embodiment uses an H-bridge circuit, one power unit 70 requires only a local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of the respective H-bridge circuits use the same local control signal, so that only one local control signal is required in one power unit 70.
  • FIG. 17 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • 17 is an embodiment based on FIG. 9 and corresponding to one power unit 70 of FIG.
  • the topology of each of the power converters 70 in the same power unit 70 is a half bridge converter.
  • the half-bridge converter includes one bridge arm 111.
  • the bridge arm 111 of the M-th half-bridge circuit includes an upper power semiconductor switch Q M1 and a lower power semiconductor switch Q M2 .
  • a connection point of one end of the upper power semiconductor switch Q M1 and the lower power semiconductor switch Q M2 is a third output terminal X 3 of the Mth power converter 701.
  • the other end of the lower power semiconductor switch Q M2 is the fourth output terminal X 4 of the Mth power converter 701.
  • the third output terminal X 3 of one of the adjacent two power converters 701 is sequentially connected to the fourth output terminal X 4 of the other one.
  • the third output terminal X 3 of the first half bridge converter is the first end X 1 of the power unit 70, and the fourth output terminal X 4 and the second half bridge of the first half bridge converter are transformed.
  • the third output terminal X 3 of the device is connected and connected in turn, and the fourth output terminal X 4 of the M-1 half bridge converter is connected with the third output terminal X 3 of the Mth half bridge converter, the Mth the fourth output X 4 is a half-bridge converter power unit 70 of the second end of X 2.
  • the local controller 91 outputs two local control signals.
  • Each half bridge converter corresponds to a drive circuit 702.
  • Each of the driving circuits 702 is coupled to the local controller 91 and is connected to the control terminals of the corresponding upper power semiconductor switch and the lower power semiconductor switch for receiving the two local control signals output by the local controller 91 and local
  • the control signals are processed to produce respective two drive signals.
  • the generated two drive signals Y M1 and Y M2 are output to the control terminals of the upper power semiconductor switch Q M1 and the lower power semiconductor switch Q M2 in the Mth half-bridge converter for driving the upper power semiconductor switch Q M1 and the lower
  • the power semiconductor switch Q M2 is turned on and off.
  • the local control signals corresponding to the power semiconductor switches of the same position of each half-bridge converter are the same, that is, the local control signals are the same, for example, the upper power semiconductor switch Q of the first half-bridge converter. 11.
  • the drive signals Y 11 , Y 21 ... Y M1 are identical, such that the upper power semiconductor switches Q 11 , Q 21 ... Q M1 are simultaneously turned on and simultaneously turned off.
  • each power converter 701 in the power unit 70 in this embodiment uses a half bridge converter, one power unit 70 requires only a local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of each half-bridge converter use the same local control signal, so that only one local control signal is required in one power unit 70.
  • Figure 18 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • 18 is an embodiment based on FIG. 10 and corresponding to one power unit 70 of FIG.
  • the topology of each of the power converters 701 in the same power unit 70 is a neutral point controllable three-level converter.
  • the neutral point controllable three-level converter includes a first bridge arm 111a and a second bridge arm 111b.
  • the first bridge arm 111a and the second bridge arm 111b each include an upper power semiconductor switch (such as Q 11 , Q 15 ) and a lower power semiconductor switch (such as Q 12 , Q 16 ).
  • the neutral point controllable three-level converter further includes a first DC bus capacitor C 1 , a second DC bus capacitor C 2 , a first switch group (such as Q 13 , Q 14 ) and a second switch group (such as Q 17) , Q 18 ).
  • the first DC bus capacitor C 1 and the second DC bus capacitor C 2 are connected in series and connected in parallel with the first bridge arm 111a and the second bridge arm 111b.
  • the connection point of the upper power semiconductor switch Q 11 and the lower power semiconductor switch Q 12 of the first bridge arm 111a is the third output terminal X 3 of the first power converter 701.
  • the connection point of the upper power semiconductor switch Q 15 and the lower power semiconductor switch Q 16 of the second bridge arm 111b is the fourth output terminal X 4 of the first power converter 701.
  • a first switch group (e.g. Q 13, Q 14) connected to the first arm 111a of the power semiconductor switches Q 11 and Q at the connection point of the power semiconductor switch 12 and the first DC bus capacitor C 1 and the second DC bus Capacitor C 2 is connected between the points.
  • the second switch group (such as Q 17 , Q 18 ) is connected to the connection point of the upper power semiconductor switch Q 15 and the lower power semiconductor switch Q 16 of the second bridge arm 111b with the first DC bus capacitor C 1 and the second DC bus Capacitor C 2 is connected between the points.
  • the first switch group is formed by connecting two power semiconductor switches in series.
  • the two power semiconductor switches may be bidirectional controllable switches.
  • the third output terminal X 3 of one of the adjacent two power converters 701 is sequentially connected to the fourth output terminal X 4 of the other one.
  • the third output terminal X 3 of the first neutral point controllable three-level converter is the first end X 1 of the power unit 70, and the first neutral point controllable three-level converter
  • the four output terminals X 4 are connected to the third output terminal X 3 of the second neutral point controllable three-level converter, and are sequentially connected, and the fourth M-1 neutral point controllable three-level converter
  • the output terminal X 4 is connected to the third output terminal X 3 of the Mth neutral point controllable three-level converter, and the fourth output terminal X 4 of the Mth neutral point controllable three-level converter is a power unit the second end 70 of X 2.
  • the local controller 91 outputs eight local control signals, each of which is used to control a corresponding upper power semiconductor switch (such as Q 11 , Q 15 ) and a lower power semiconductor switch (such as Q 12 , Q). 16 ), one of the first switch group (such as Q 13 , Q 14 ) and the second switch group (such as Q 17 , Q 18 ).
  • the local control signals corresponding to the power semiconductor switches of the same position of each neutral point controllable three-level converter are the same, that is, the local control signals are the same, and the neutral point controllable three-level converter in the power unit
  • the first power semiconductor switch of the first neutral point controllable three-level converter, the first power semiconductor switch Q 11 of the first neutral point controllable three-level converter, and the first power semiconductor switch of the second neutral point controllable three-level converter Q 21 and so on until the first power semiconductor switch Q M1 of the Mth neutral point controllable three-level converter corresponds to the same local control signal, that is, the local control signal is the same, that is, the output of the driving circuit 702 is corresponding.
  • each power converter 701 in the power unit 70 in this embodiment uses a neutral point controllable three-level converter, one power unit 70 requires only a local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of each neutral point controllable three-level converter in this embodiment use the same local control signal, so that one power unit 70 requires only a total of eight local control signals.
  • 19 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • 19 is an embodiment based on FIG. 11 and corresponding to one power unit 70 of FIG.
  • the topology of each of the power converters 70 in the same power unit 70 is a diode clamped three-level converter.
  • the diode clamped three-level converter includes a first bridge arm 111a and a second bridge arm 111b.
  • the first bridge arm 111a and the second bridge arm 111b each include a first power semiconductor switch (such as Q 11 , Q 15 ), a second power semiconductor switch (such as Q 12 , Q 16 ), and a third power semiconductor switch (such as Q 13 , Q 17 ) and a fourth power semiconductor switch (such as Q 14 , Q 18 ).
  • the diode clamped three-level converter further includes a first DC bus capacitor C 1 , a second DC bus capacitor C 2 , a first diode D 1 , a second diode D 2 , and a third diode D 3 And a fourth diode D 4 .
  • the first DC bus capacitor C 1 and the second DC bus capacitor C 2 are connected in series and connected in parallel with the first bridge arm 111a and the second bridge arm 111b.
  • the first leg 111a of the first power semiconductor switch Q 11, a second power semiconductor switch Q 12, Q 13 is the third power semiconductor switch and the fourth power semiconductor switch Q 14 connected in series.
  • the connection point of the second power semiconductor switch Q 12 and the third power semiconductor switch Q 13 is the third output terminal X 3 of the power converter 401.
  • the first power semiconductor switch Q 15 , the second power semiconductor switch Q 16 , the third power semiconductor switch Q 17 and the fourth power semiconductor switch Q 18 of the second bridge arm 111b are connected in series.
  • the junction point of the second power semiconductor switch Q 16 and the third power semiconductor switch Q 17 is the fourth output terminal X 4 of the power converter 401.
  • the first diode D 1 and the second diode D 2 are connected in series and connected to the connection point of the first power semiconductor switch Q 11 and the second power semiconductor switch Q 12 of the first bridge arm 111a and the third power semiconductor switch Q and the fourth power semiconductor switch 13 between the connection point Q 14.
  • the third diode D 3 and the fourth diode D 4 are connected in series and connected to the connection point of the first power semiconductor switch Q 16 and the second power semiconductor switch Q 17 of the second bridge arm 111b and the third power semiconductor switch Q and the fourth power semiconductor switch 17 between the connection point Q 18.
  • a connection point of the first diode D 1 and the second diode D 2 is connected to a connection point of the first DC bus capacitor C 1 and the second DC bus capacitor C 2 .
  • the junction of the third diode D 3 and the fourth diode D 4 is also connected to the junction of the first DC bus capacitor C 1 and the second DC bus capacitor C 2 .
  • the role of the first diode D 1 and diode D 2 is a second clamping diode, a first power semiconductor switch, the second power semiconductor switch, a third power semiconductor switch and the fourth power semiconductor
  • the switch is an IGBT or an IGCT.
  • the third output terminal X 3 of one of the adjacent two power converters 701 is sequentially connected to the fourth output terminal X 4 of the other one.
  • the third output terminal X 3 of the first diode clamped three-level converter is the first terminal X 1 of the power unit 70
  • the fourth output terminal X of the first diode clamped three-level converter 4 is connected to the third output terminal X 3 of the second diode clamped three-level converter, and sequentially connected, the fourth output terminal X 4 and the Mth of the M-1th diode clamped three-level converter
  • the third output terminal X 3 of the diode clamped three-level converter is connected
  • the fourth output terminal X 4 of the Mth diode clamped three-level converter is the second terminal X 2 of the power unit 70.
  • the local controller 91 outputs eight local control signals, each of which is used to control a corresponding first power semiconductor switch (such as Q 11 , Q 15 ) and a second power semiconductor switch (such as Q 12). , Q 16 ), one of a third power semiconductor switch (such as Q 13 , Q 17 ) and a fourth power semiconductor switch (such as Q 14 , Q 18 ).
  • the local control signal corresponding to the power semiconductor switch of the same position of each diode clamped three-level converter is the same, for example, the first power semiconductor switch of the diode clamped three-level converter in the power unit is taken as an example, the first a first power semiconductor switch Q 11 of a diode clamped three-level converter, a first power semiconductor switch Q 21 of a second diode clamped three-level converter, and so on until the Mth diode clamps three levels
  • the local control signals corresponding to the first power semiconductor switch Q M1 of the converter are the same, that is, the local control signals are the same, that is, the driving circuit 702 outputs the corresponding driving signals Y 11 , Y 21 ...
  • each of the power converters 701 in the power unit 70 in this embodiment employs a diode clamped three-level converter, one power unit 70 requires only a local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of the diode clamped three-level converters use the same local control signal, so that only one local control signal is required for one power unit.
  • 20 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention. 20 is an embodiment based on FIG. 12 and corresponding to one power unit 70 of FIG. As shown in FIG. 20, the topology of each of the power converters 70 in the same power unit 70 is a flying capacitor three-level converter. Taking the first flying capacitor three-level converter as an example, the flying capacitor three-level converter includes a first bridge arm 111a and a second bridge arm 111b.
  • the first bridge arm 111a and the second bridge arm 111b each include a first power semiconductor switch (Q 11 , Q 15 ), a second power semiconductor switch (Q 12 , Q 16 ), and a third power semiconductor switch (Q 13 , Q 17 ) And a fourth power semiconductor switch (Q 14 , Q 18 ).
  • the flying capacitor three-level converter further includes a first DC bus capacitor C 1 , a first DC bus capacitor C 2 , a first capacitor C 3 , and a second capacitor C 4 .
  • the first DC bus capacitor C 1 and the first DC bus capacitor C 2 are connected in series and connected in parallel with the first bridge arm 111a and the second bridge arm 111b.
  • the first leg 111a of the first power semiconductor switch Q 11, a second power semiconductor switch Q 12, Q 13 is the third power semiconductor switch and the fourth power semiconductor switch Q 14 connected in series.
  • the connection point of the second power semiconductor switch Q 12 and the third power semiconductor switch Q 13 is the third output terminal X 3 of the power converter 401.
  • the first power semiconductor switch Q 15 , the second power semiconductor switch Q 16 , the third power semiconductor switch Q 17 and the fourth power semiconductor switch Q 18 of the second bridge arm 111b are connected in series.
  • the junction point of the second power semiconductor switch Q 16 and the third power semiconductor switch Q 17 is the fourth output terminal X 4 of the power converter 401.
  • the first capacitor C 3 is connected to the connection point of the first power semiconductor switch Q 11 and the second power semiconductor switch Q 12 of the first bridge arm 111a and the third power semiconductor switch Q 13 and the fourth power semiconductor of the first bridge arm 111a Q switch 14 between the connection point.
  • the second capacitor C 4 is connected to the connection point of the first power semiconductor switch Q 15 and the second power semiconductor switch Q 16 of the second bridge arm 111b and the third power semiconductor switch Q 17 and the fourth power semiconductor of the second bridge arm 111b Between the connection points of switch Q 18 .
  • the third output terminal X 3 of one of the adjacent two power converters 701 is sequentially connected to the fourth output terminal X 4 of the other one.
  • the third output terminal X 3 of the first flying capacitor three-level converter is the first end X 1 of the power unit 70
  • the fourth output terminal X of the first flying capacitor three-level converter 4 is connected to the third output terminal X 3 of the second flying capacitor three-level converter, and sequentially connected, the fourth output terminal X 4 and the Mth of the M-1 flying capacitor three-level converter flying capacitor to the third three-level inverter connected to the output terminal X 3, M-th output terminal of the flying capacitor a fourth three-level converter for the power unit of the X 4 of the second end 70 of X 2.
  • the local controller 91 outputs eight local control signals, each of which is used to control a corresponding first power semiconductor switch (such as Q 11 , Q 15 ) and a second power semiconductor switch (such as Q 12). , Q 16 ), one of a third power semiconductor switch (such as Q 13 , Q 17 ) and a fourth power semiconductor switch (such as Q 14 , Q 18 ).
  • the local control signal corresponding to the power semiconductor switch of the same position of each flying capacitor three-level converter is the same, for example, the first power semiconductor switch of the flying capacitor three-level converter in the power unit is taken as an example, the first a flying capacitor a first three-level converter power semiconductor switch Q 11, the second flying capacitor a first three-level converter power semiconductor switch Q 21, and so on until the M-th three-level flying capacitor
  • the local control signal corresponding to the first power semiconductor switch Q M1 of the converter is the same, that is, the driving circuit 702 outputs the corresponding driving signals Y 11 , Y 21 ... Y M1 to be the same, so that the first power semiconductor switches Q 11 , Q 21 until Q M1 is turned on and off at the same time.
  • each power converter 701 in the power unit 70 in this embodiment employs a flying capacitor three-level converter, one power unit 70 requires only one local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of each of the flying capacitor three-level converters use the same local control signal, so that only one local control signal is required for one power unit.
  • 21 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • 21 is an embodiment based on FIG. 13 and corresponding to one power unit 70 of FIG.
  • the topology of each of the power converters 701 in the same power unit 70 is a full bridge resonant converter.
  • the full bridge resonant converter 701 includes a full bridge circuit, a resonant circuit, a transformer, and a rectifier bridge, the connection relationship of which is as shown in FIG.
  • the full-bridge circuit includes four power semiconductor switches and one DC bus capacitor. One end of the power semiconductor switch Q 11 is connected to one end of the DC bus capacitor C B ' and the power semiconductor switch Q.
  • One end 13 of the power semiconductor switch and the other end Q 11 is connected to the power semiconductor switch end Q 12 of the power semiconductor switch and the other end Q 12 is connected to the DC bus capacitor C B 'and the other end of the power semiconductor switch and the other end Q 14 of
  • the connection point of the power semiconductor switch Q 11 and the power semiconductor switch Q 12 is connected to one end of the resonant circuit formed by the capacitor C' and the inductor L', and the other end of the resonant circuit is connected to one end of the primary coil of the transformer T', and the transformer T 'the other end of the primary coil is connected to a connection point of the power semiconductor switch Q 13 and Q 14 of the power semiconductor switches, the DC bus capacitor C B' end to a first end of the third power converter X 3, the DC bus capacitor
  • the other end of C B ' is the fourth end X 4 of the first power converter
  • the rectifier bridge includes four rectifier diodes, and one end of the rectifier diode D 1 ' is connected to the rectifier diode D
  • each of the power unit 70 of a third terminal of the full bridge resonant converter power unit X 3 is a first end 70 of the X 1
  • a first full-bridge resonant converter fourth terminal X 4 is connected to the third end X 3 of the second full-bridge resonant converter
  • the fourth end X 4 of the M-1 full-bridge resonant converter is connected to the third end X of the M-th full-bridge resonant converter 3.
  • the fourth end X 4 of the Mth full bridge resonant converter is the second end X 2 of the power unit 70.
  • the fifth end X 5 of each of the full bridge resonant converters in each of the power units 70 is connected together, and the sixth end X 6 is connected together.
  • the local control signals corresponding to the power semiconductor switches of the same position of the full bridge circuit in each full bridge resonant converter are the same, that is, the local control signals are the same, for example, the power of the first full bridge circuit.
  • the circuit 702 outputs the corresponding drive signals Y 11 , Y 21 ... Y M1 to be the same, so that the upper power semiconductor switches Q 11 , Q 21 ... Q M1 are simultaneously turned on and simultaneously turned off.
  • each power converter 701 in the power unit 70 in this embodiment uses a full bridge resonant converter, one power unit 70 requires only a local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of the full bridge resonant converters use the same local control signal, so that only one local control signal is required in one power unit 70.
  • FIG. 22 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention. 22 is an embodiment based on FIG. 14 and corresponding to one power unit 70 of FIG. As shown in FIG. 22, the topology of each of the power converters 701 in the same power unit 70 is a half bridge resonant converter.
  • the half bridge resonant converter 701 includes a half bridge circuit, a resonant circuit, a transformer, and a rectifier bridge, the connection relationship of which is as shown in FIG. Taking the first half-bridge resonant converter 701 as an example, the half-bridge circuit includes two power semiconductor switches and one DC bus capacitor.
  • One end of the power semiconductor switch Q 11 is connected to one end of the DC bus capacitor C B ', and the power semiconductor switch Q the other end 11 is connected to the power semiconductor switch end Q 12, the power semiconductor switch other ends Q 12 is connected to the DC bus capacitor C B ', the power semiconductor switch Q 11 of the power semiconductor switch Q is connected to the point 12 is connected to the 'One end of the primary coil of the transformer T''L and the inductance' end of the resonance circuit composed of the other end of the resonance circuit of the capacitor C is connected to the transformer T, the other end of the primary coil is connected to the power semiconductor switch of another Q 12 of At one end, one end of the DC bus capacitor C B ' is the third end X 3 of the first power converter, and the other end of the DC bus capacitor C B ' is the fourth end X 4 of the first power converter, and the rectifier bridge includes four rectifying diodes, the rectifying diode D 1 'is connected to one end of the rectifying diode D 3' end, a rectifying diode D 1
  • the third end X 3 of the first half-bridge resonant converter in each power unit 70 is the first end X 1 of the power unit 70, and the fourth end X of the first half-bridge resonant converter 4 is connected to the third end X 3 of the second half-bridge resonant converter, and so on, and the fourth end X 4 of the M-1 half-bridge resonant converter is connected to the third end X of the M-th half-bridge resonant converter 3.
  • the fourth end X 4 of the Mth half-bridge resonant converter is the second end X 2 of the power unit 70.
  • the fifth ends X 4 of all of the half-bridge resonant converters in each power unit 70 are connected together, and the sixth ends X 6 are connected together.
  • the power semiconductor switches of the same position of the half bridge circuit in each half-bridge resonant converter have the same local control signal, that is, the local control signals are the same, for example, the power of the first half bridge circuit.
  • the drive signals Y 11 , Y 21 ... Y M1 are identical, such that the power semiconductor switches Q 11 , Q 21 ... Q M1 are simultaneously turned on and off at the same time.
  • each power converter 701 in the power unit 70 in this embodiment uses a half bridge resonant converter, one power unit 70 requires only a local controller 91, an optical fiber 94, and an auxiliary power source 93.
  • the power semiconductor switches at the same position of each half-bridge converter use the same local control signal, so that only one local control signal is required in one power unit 70.
  • FIG. 23 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • FIG. 23 is an embodiment based on FIG. 15 and corresponding to one power unit 70 of FIG.
  • the topology of the M power converters 701 in the same power unit 70 employs a combination of a full bridge converter and a half bridge converter.
  • the power converter 7011' of the full bridge converter includes four power semiconductor switches, and the half bridge converter 7012' includes two power semiconductor switches.
  • the specific connection relationship of the full bridge converter is as shown in FIG. 8
  • the specific connection relationship of the half bridge converter is shown in FIG. 9 , and details are not described herein again.
  • the fourth end X 4 of one of the adjacent two power converters 701 is coupled to the third end X 3 of the other, where M is a natural number greater than one.
  • the third end X 3 of the first power converter 701 is the first end X 1 of the power unit 70
  • the fourth end X 4 of the first power converter 701 is connected to the second power converter 701.
  • the third end X 3 , and so on, the fourth end X 4 of the M-1th power converter 701 is connected to the third end X 3 of the Mth power converter 701, and the fourth end of the Mth power converter 701 X 4 is the second end X 2 of the power unit 70.
  • the local control signals corresponding to the power semiconductor switches of the same position of each full-bridge converter are the same, that is, the driving signals output by the driving circuit are the same, so that the power semiconductor switches of the same position are simultaneously turned on and off simultaneously. open.
  • the local control signals corresponding to the power semiconductor switches of the same position of each half-bridge converter are the same, that is, the local control signals are the same, that is, the driving signals output corresponding to the driving signals are the same, so that the power semiconductor switches of the same position are simultaneously turned on and Disconnect at the same time Since the topology of the M power converters in the power unit 70 in this embodiment simultaneously uses a combination of a full bridge converter and a half bridge converter, one power unit 70 requires only one local controller 91, fiber 94, and auxiliary power source 93. .
  • the power semiconductor switches at the same position of the respective full-bridge converters use the same local control signal, and the power semiconductor switches at the same position of the respective half-bridge converters use the same local control signal, so that only one power unit 70 6 local control signals are required.
  • the topology of the M power converters 701 of each power unit 70 in the modular power system uses both a full bridge converter, a half bridge converter, a neutral point controllable three level converter, and a diode.
  • the local control signals corresponding to the same position of the power semiconductor switches of the same topology in the M power converters 701 are the same, that is, the driving circuit outputs corresponding driving signals are the same, so that the power semiconductor switches of the same position are simultaneously turned on and simultaneously turned off.
  • each power unit 70 in the modular power supply system of the present embodiment may include: a plurality of driving circuits 702, the number of driving circuits in the power unit being equal to the power semiconductor switches in the power unit A quantity, wherein each of the driving circuits 702 is configured to be connected to a power semiconductor switch of the corresponding power converter 701, receive a local control signal output by the corresponding local controller 91, to output a driving signal to drive the corresponding power semiconductor switch Pass and disconnect.
  • Figure 24 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 24 is a partial schematic view of Figure 10 based on Figure 10.
  • the power unit 70 can include 8 x M drive circuits, each of which is configured to be electrically coupled to power semiconductor switches Q 11 , Q 12 ... Q 18 ... Q M1 , Q M2 of power converter 701.
  • a corresponding one of .Q M8 each driving circuit receives a local control signal output by the corresponding local controller 91 to output driving signals Y 11 , Y 12 ... Y 18 ... Y M1 , Y M2 . ..
  • a corresponding one of Y M8 to drive the on and off of the corresponding power semiconductor switch.
  • each driving circuit includes a corresponding local control signal outputted by the corresponding local controller 91 to output a driving signal to drive the corresponding power semiconductor switch to be turned on and off.
  • Each of the drive circuits 702 of the modular power supply system of the present invention can be directly electrically connected to the corresponding local controller 91, or connected by magnetic isolation devices, or connected by optical isolation devices.
  • Each of the drive circuits 702 in the modular power supply system of the present invention may be identical to each other or different from each other.
  • the respective driving circuits 702 in the modular power supply system of the present embodiment are identical to each other.
  • FIG. 25 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • at least one of the M power converters 701 in each of the power units 70 in the modular power supply system of the present embodiment is a master power converter 7012, at least one of which is a slave power converter 7011, wherein
  • the main power converter 7012 and the slave power converter 7011 have the same topology, and one of the power converters described in FIGS. 15 to 22, or the topology of the main power converter 7012 and the slave power converter 7011, may be employed.
  • the main power converter can employ one of the power converters described in Figures 15-22
  • the slave power converter can employ another of the power converters described in Figures 15-22.
  • At least one of the M driving circuits is a main driving circuit 722, at least one of which is a slave driving circuit 721, and the main driving circuit 722 is configured to drive the power semiconductor switches in the corresponding main power converter 7012 to be turned on and off.
  • Each of the slave drive circuits 721 is configured to drive the turn-on and turn-off of the power semiconductor switches in the corresponding slave power converter 7011.
  • the main drive circuit 722 is different from the slave drive circuit 721.
  • the main driving circuit 722 and the slave driving circuit 721 may be different, and each of the slave driving circuits 721 is the same, the main power converter 7012.
  • the local control signals corresponding to each of the power semiconductor switches at the same location from power converter 7011 may be the same, for example, the same local control signal.
  • the main drive circuit 722 and the slave drive circuit 721 may be different, and the local control signals corresponding to the power semiconductor switches at the same position as the main power converter 7012 and the power converter 7011 may be different;
  • the local control signals corresponding to the power semiconductor switches at the same location of power converter 7011 may be the same.
  • FIG. 26 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • each power unit 70 in the modular power supply system of the present embodiment includes a main power converter 7012 and M-1 slave power converters 7011, M-1 slave power converters 7011.
  • the topology of the main power converter 7012 may be one of FIG. 15 to FIG. 22, and the topology of the slave power converter 7011 may also be FIG. 15-22. One of them.
  • the main power converter 7012 in FIG. 26 and the slave power converter 7011 can be driven differently.
  • Each of the slave power converters can take the aforementioned "common drive", while the main power converter 7012 takes an independent control mode.
  • FIG. 27 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • each of the auxiliary power sources 93 in the modular power supply system of the present embodiment can be configured to draw power from an external power source, such as from a commercial power source, or from another circuit, each of the auxiliary power sources 93. Connect the external power supply E C .
  • FIG. 28 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the N auxiliary power sources 93 in the modular power supply system of the present embodiment are in one-to-one correspondence with the N power units 70, and each of the auxiliary power sources 93 can be configured to be taken from the corresponding power unit 70.
  • the power is taken, for example, from the DC bus capacitance of one or more power converters in the corresponding power unit 70.
  • each of the power units 70 in the modular power supply system of any of FIGS. 8-22 further includes: M sampling circuits 704, and the M The power converters are configured to collect the positive DC bus voltage and the negative DC bus voltage of the corresponding power converter 701; the corresponding local controller 91 is configured to include M sampling conditioning circuits 913, and the sampling conditioning circuit 913 and The sampling circuit 704 is in one-to-one correspondence and is configured to convert the positive DC bus voltage and the negative DC bus voltage of the collected power converter 701 into digital signals.
  • the M sampling circuits 704 include: M DC bus positive terminal samplers, that is, resistors R, which are in one-to-one correspondence with M power converters 701 and M sampling and conditioning circuits 913, wherein M DC bus positive terminal samplers are respectively configured.
  • M DC bus positive terminal samplers are respectively configured.
  • M a positive terminal of the DC bus are samplers is configured to connect the other end of the corresponding
  • the first end of the sampling conditioning circuit 913 receives the positive DC bus voltage of the power converter 701.
  • the M DC bus negative end samplers that is, the corresponding resistors R, are in one-to-one correspondence with the M power converters 701 and the M sampling and conditioning circuits 913, wherein the M DC bus negative end samplers are respectively configured to be connected at one end.
  • the negative terminal of the DC bus capacitor C B to the power converter 701 e.g., V 1 -, V x -, V M -
  • M a negative DC bus terminals are sampler configured to sample the corresponding conditioning circuit 913 is connected to the other end At the second end, the second end of the sampling conditioning circuit 913 receives the negative DC bus voltage of the power converter.
  • the DC bus positive terminal sampler and the DC bus negative terminal sampler are described by taking a resistor as an example, but the present invention is not limited thereto, and the DC bus positive terminal sampler and the DC bus negative terminal sampler may also be multiple.
  • the resistors are connected in series, or a plurality of resistors are connected in parallel, or a combination of resistors and other electronic components.
  • Sampling conditioning circuit 913 can include a single operational amplifier.
  • the sampling conditioning circuit 913 also includes a sampling reference point or a sampling reference ground GND.
  • FIG. 30 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 30 is a specific embodiment of Figure 29.
  • each of the power converters 701 of FIG. 30 is not only independently sampled, but also employs the aforementioned independent driving method.
  • the power unit 70 corresponds to a local controller 91, and the number of local control signals and power semiconductor switches of the power semiconductor switches of the M power converters 701 in the corresponding power unit 70 controlled by the local controller 91 are output.
  • the number is the same, that is, each power semiconductor switch needs to be controlled by a separate local control signal.
  • the relevant contents of the sampling circuit and the sampling conditioning circuit 913 have been described in Fig. 29 and will not be described again.
  • FIG. 31 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 31 is a specific embodiment of Figure 29.
  • each of the power converters 701 in FIG. 31 is not only independently sampled, but also employs the aforementioned common driving method.
  • the power unit 70 corresponds to a local controller 91, and the local controller 91 outputs a control corresponding power unit 70 in which the power semiconductor switches are turned on and off at the same position of the M power converters 701.
  • the control signals are the same.
  • the relevant content of the sampling circuit and the sampling conditioning circuit 913 has been described in FIG. 29 and will not be described herein.
  • FIG. 32 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • Figure 32 is a specific embodiment of Figure 29.
  • each of the power converters 701 of FIG. 32 is independently sampled, but a part of the power converters 701 adopts the aforementioned independent driving mode, and a part of the power converters 701 adopts the aforementioned common driving mode.
  • FIG. 33 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • each of the power units 70 in the modular power supply system of any of FIGS. 15-22 further includes: a sampling circuit 704,
  • the local controller 91 is configured to include a sum of the positive DC bus voltages of the M power converters 701 and the negative DC bus voltages, and the corresponding local controller 91 is configured to include a sampling conditioning circuit 913 configured to acquire the acquired M
  • the sum of the positive DC bus voltages of the power converters 701 and the negative DC bus voltages are converted into digital signals.
  • the sampling circuit 704 in the modular power supply system of the present embodiment is configured to include: M DC bus positive-end samplers, that is, resistors R, which are in one-to-one correspondence with the aforementioned M power converters 701.
  • the M DC bus positive terminal samplers are respectively configured to be connected to the DC bus positive terminal of the corresponding power converter 701 at one end, for example, V 1 + to V M + , and the other ends are connected together and connected to the sampling conditioning circuit 913.
  • the first end of the sampling conditioning circuit receives the sum of the positive DC bus voltages of the M power converters 701; and the M DC bus negative end samplers, that is, the resistor R, and the M power converters 701 Correspondingly, wherein the M DC bus negative end samplers are respectively configured to connect one end of the corresponding DC bus negative terminal of the power converter 701, for example, V 1 - to V M -, and the other ends are connected together and connected to the sampling.
  • the second end of the conditioning circuit receives the sum of the negative DC bus voltages of the M power converters 701.
  • the sampling circuit is not limited to include a resistor, but may be other circuits.
  • the sampling circuit in the modular power supply system of the present embodiment passes the M power through the DC bus positive end sampler and the DC bus negative end sampler.
  • the positive DC bus voltage and the negative bus voltage of the converter 701 are summed and summed, respectively, and input to the sampling conditioning circuit 913, wherein the sampling conditioning circuit 913 includes an operational amplifier.
  • the DC bus positive terminal sampler and the DC bus negative terminal sampler may be a single resistor or a combination of series, parallel or series-parallel connections of multiple resistors.
  • FIG. 34 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the present invention sets the sampling reference point GND of the sampling conditioning circuit 913 and the local controller 91 as much as possible at the most centrally located power converter 701 among the M power converters 701, for example, sampling reference points.
  • the GND is set at the positive terminal of the DC bus capacitor C B of the power converter 701 at the most center position, or the negative terminal of the DC bus capacitor C B , so that the common mode voltage of the sampling voltage can be minimized, thereby improving the sampling accuracy and reducing the total Mode interference.
  • the sampling circuit 704 in the modular power supply system of the present embodiment is configured to separately acquire the sum of the positive DC bus voltages of the aforementioned M power converters and the sum of the negative DC bus voltages, wherein M is An odd number, the sampling reference point GND is set at the (M+1)/2th power converter, so that the sampling reference point GND is set at the most centrally located power converter 701 among the aforementioned M power converters 701, for example, sampling reference point GND disposed negative (M + 1) / 2 th of the power converter 701 DC bus capacitor C B terminal V (M + 1) / 2- .
  • the sampling reference point GND may be set at the positive terminal V (M+1)/2 + of the DC bus capacitance C B of the (M+1)/2th power converter 701.
  • FIG. 35 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the sampling circuit 704 in the modular power supply system of the present embodiment is configured to separately acquire the sum of the positive DC bus voltages of the aforementioned M power converters and the sum of the negative DC bus voltages, wherein M is Even, the sampling reference point is set at the M/2th of the power converters such that the sampling reference point GND is disposed at the power converter 701 at the most centered position among the M power converters 701, for example, the sampling reference point The negative terminal V M/2 - of the DC bus C B of the M/ 2th power converter is provided.
  • the sampling reference point GND may be disposed at the positive terminal V M/2 + of the DC bus C B of the M/ 2th power converter.
  • the sampling circuit 704 in the modular power supply system of the present embodiment is configured to separately acquire the sum of the positive DC bus voltages of the aforementioned M power converters and the sum of the negative DC bus voltages, wherein M is Evenly, the sampling reference point is set at the M/2+1th of the power converters such that the sampling reference point GND is disposed at the power converter 701 where the position is relatively the most centered among the M power converters 701, for example, The sampling reference point GND is set at the positive terminal V M/2+1 + of the DC bus C B of the M/2+ 1th power converter.
  • the sample may be provided at the reference point GND negative terminal V M of the DC bus capacitor C B of (M / 2 + 1) th power converter 701/2 + 1 -
  • FIG. 37 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • the DC bus capacitor C B of each power converter 701 is formed by connecting two capacitors in series, and the connection point of the two capacitors in series is the midpoint of the DC bus capacitor C B , where M is an odd number.
  • M is an odd number.
  • the sampling GND reference point may be disposed at the midpoint of the DC bus capacitor C B of (M + 1) / 2 of said power converter.
  • the sampling reference point GND may be set at a midpoint of the DC bus capacitor C B of the M/2th power converter, or the (M/2+1)th The midpoint of the DC link capacitor C B of the power converter.
  • the DC bus capacitor C B of each power converter 701 contains only one capacitor, and there is no capacitor midpoint. It is necessary to parallel two mutual ends of the DC bus capacitor C B of each power converter 701. A resistor connected in series, wherein when M is an odd number, the sampling reference point GND is set at a connection point of two of the resistors at (M+1)/2th of the power converters.
  • the sampling reference point GND is set at a connection point of two of the resistors at the M/2th power converter, or the sampling reference point GND is set at (M/2+1) connection points of the two resistors at the power converter.
  • the DC bus capacitor C B is single, and it can be determined that the DC bus capacitor C B has no midpoint. Then, parallel voltage equalizing resistor is connected across the DC bus capacitor C B , wherein the voltage equalizing resistor is composed of two equivalent resistors in series, and the connection point between the two equivalent resistors is set to the midpoint, then The sampling reference point GND is set to the midpoint at the most centrally located power converter 701 of the M power converters 701.
  • the sample conditioning circuit 913 shown in Figures 33-38 can include a single operational amplifier.
  • FIG. 39 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • each power unit 70 in the modular power supply system of the present embodiment further includes: a main sampling circuit 7042 configured to collect the positive DC bus voltage and the negative DC bus voltage of the main power converter 7012. And the sampling reference point GND is set at the capacitance midpoint of the main power converter; and the M-1 slave sampling circuits 7041 are configured to acquire the sum of the positive DC bus voltages of the M-1 slave power converters 7011 and the negative DC bus.
  • the main sampling circuit 7042 includes: a main DC bus positive end sampler, that is, a resistor, corresponding to the main power converter 7012, wherein the main DC bus positive end sampler One end is connected to the positive end of the DC bus of the main power converter, and the other end is connected to the first end of the sampling conditioning circuit 913, and the first end of the sampling conditioning circuit 913 receives the positive DC bus voltage V S2 + of the main power converter 7012; One end of the main DC bus negative end sampler is connected to the negative end of the DC bus of the main power converter 7012, the other end is connected to the second end of the sampling conditioning circuit 913, and the second end of the sampling conditioning circuit 913 receives the main power converter 7012.
  • a main DC bus positive end sampler that is, a resistor
  • the slave sampling circuit 7041 includes: M-1 slave DC bus positive terminal samplers, that is, resistors, one-to-one corresponding to the M-1 slave power converters 7011, wherein M-1 slave DC bus positive terminal samplers One end is respectively configured to connect one end of the corresponding DC bus positive terminal of the power converter 7011, the other end is connected together and is connected to the third end of the sampling conditioning circuit 913, and the third end of the sampling conditioning circuit 913 receives M-1 The sum of the positive DC bus voltages from the power converter 7011, V S1+ ; and the M-1 slave DC bus negative samples, that is, the resistors, are in one-to-one correspondence with the M-1 slave power converters 7011, where M- One slave DC bus negative sampler is configured to be connected at one end to the DC bus negative terminal of the corresponding slave power converter 7011, and the other end is connected together and connected to the fourth terminal of the sampling conditioning circuit 913, and the sampling conditioning circuit 913 The fourth terminal receives the sum
  • the number M of power converters in FIG. 39 is 5, but the invention is not limited thereto, and is applicable, for example, to the embodiment in which the power unit includes a master-slave power converter in the foregoing figures.
  • the most central H-bridge circuit is the main power converter, and the four H-bridge circuits distributed on both sides are slave power converters, and each H The DC bus voltage of the bridge circuit is V bus .
  • the sampling reference point GND is not set properly, if the sampling reference point GND is set at the DC bus negative terminal of the H-bridge circuit shown at the bottom, the DC bus voltages of the five H-bridge circuits shown from top to bottom are positive and DC.
  • the bus voltages are negative (5V bus , 4V bus ), (4V bus , 3V bus ), (3V bus , 2V bus ), (2V bus , V bus ), (V bus , 0).
  • the sampling ratio of the sampling circuit is k.
  • the sampling voltage Vs 2 + 15*k*V bus
  • Vs 2 - 10*k*V bus
  • the differential mode component V DM 5kV in the sampling voltage
  • the common mode component V CM 12.5 kV.
  • the present invention sets the sampling reference point GND of the sampling conditioning circuit 913 and the local controller 91 after the midpoint of the DC bus capacitance of the most intermediate H-bridge circuit, and then the DC of the five H-bridge circuits shown from top to bottom.
  • FIG. 40 is a block diagram of a modular power supply system in accordance with another embodiment of the present invention.
  • each power unit 70 in the modular power supply system of the present embodiment further includes: a plurality (eg, two or more) of main sampling circuits 7042 configured to acquire a plurality of main power converters 7012, respectively.
  • the main sampling circuit 7042 includes: a plurality of main DC bus positive-end samplers, one-to-one corresponding to the main power converter 7012, wherein the main DC bus positive-end sampler One end of the main power converter is connected to the positive end of the main DC converter, the other end is connected together and connected to the first end of the sampling conditioning circuit 913', and the first end of the sampling conditioning circuit 913' receives the main power converter 7012.
  • the sum of the positive DC bus voltages; and one end of the main DC bus negative end sampler is connected to the main DC bus negative terminal of the main power converter 7012, and the other end is connected together and connected to the second end of the sampling conditioning circuit 913'.
  • the second end of the sampling conditioning circuit 913' receives the sum of the negative DC bus voltages of the main power converter 7012.
  • the slave sampling circuit 7041 includes: a plurality of slave DC bus positive-end samplers, one-to-one corresponding to the plurality of slave power converters 7011, wherein one ends of the plurality of slave DC bus positive-end samplers are respectively configured to be connected at one end From the positive end of the DC converter from the power converter 7011, the other end is connected together and connected to the first end of the sampling conditioning circuit 913, the first end of the sampling conditioning circuit 913 receives the positive DC bus voltage of the plurality of slave power converters 7011.
  • a plurality of slave DC bus negative end samplers one-to-one correspondence with the plurality of slave power converters 7011, wherein the plurality of slave DC bus negative terminal samplers are respectively configured to be connected to the corresponding slave power converters at one end
  • the negative end of the DC bus from 7011 is connected together and connected to the second end of the sampling conditioning circuit 913.
  • the second end of the sampling conditioning circuit 913 receives the sum of the negative DC bus voltages of the plurality of slave power converters 7011.
  • the number M of power converters in FIG. 40 is four, but the present invention is not limited thereto, and is applicable, for example, to the embodiment in which the master-slave power converter is included in the power unit in the foregoing figures.
  • the sampling conditioning circuit as shown in Figures 39 and 40 can include a dual operational amplifier.
  • the invention can reduce the number of local controllers, optical fibers and auxiliary power sources by simplifying the structure by forming a plurality of power converters into one power unit and using a local controller, an optical fiber, and an auxiliary power source to control multiple power converters. Design, reduce costs and improve reliability.
  • the present invention simplifies the control circuit by sharing a local control signal at the same location of the power semiconductor switches at the same location of the power converters in the power unit.
  • the invention can collect the bus voltage of the power converter through the sampling circuit and the sampling conditioning circuit, and improve the sampling precision of the DC bus voltage.
  • the invention is applicable to the topology of all AC/DC, DC/AC, DC/DC power converter connections and is widely used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

La présente invention concerne un système d'alimentation électrique modulaire, comprenant : un dispositif de commande principal (90) conçu pour émettre un signal de commande principal; N dispositifs de commande locaux (91), chaque dispositif de commande local étant conçu pour recevoir le signal de commande principal de manière à émettre au moins un signal de commande local (702); et N unités d'alimentation (70) qui sont en correspondance biunivoque avec les N dispositifs de commande locaux. Chaque unité d'alimentation comprend une première borne (X1) et une seconde borne (X2), la seconde borne de chaque unité d'alimentation étant connectée à une première borne d'une unité d'alimentation adjacente. Chaque unité d'alimentation est conçue pour comprendre M convertisseurs de courant (701), et chaque convertisseur de courant est conçu pour fonctionner selon un signal de commande local qui est émis par un dispositif de commande local correspondant. Chaque unité d'alimentation comprend en outre M circuits d'échantillonnage conçus pour échantillonner une tension de bus de courant continu positive et une tension de bus de courant continu négative des M convertisseurs de courant respectivement. M et N sont des nombres entiers supérieurs à 1.
PCT/CN2017/116351 2016-12-16 2017-12-15 Système d'alimentation électrique modulaire WO2018108140A1 (fr)

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EP17881249.1A EP3557752A4 (fr) 2016-12-16 2017-12-15 Système d'alimentation électrique modulaire
US16/464,882 US10924030B2 (en) 2016-12-16 2017-12-15 Modular power supply system
BR112019012073-4A BR112019012073B1 (pt) 2016-12-16 2017-12-15 Sistema modular de fornecimento de potência
AU2017376697A AU2017376697B2 (en) 2016-12-16 2017-12-15 Modular power supply system

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CN201611170857 2016-12-16
CN201611170857.3 2016-12-16
CN201611191912.7A CN108206643A (zh) 2016-12-16 2016-12-21 功率单元及使用该功率单元的电力电子变换装置
CN201611191912.7 2016-12-21
CN201710106946 2017-02-27
CN201710106946.X 2017-02-27
CN201711319865.4A CN108233747B (zh) 2016-12-16 2017-12-12 模块化电源系统
CN201711319865.4 2017-12-12

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CN112821539A (zh) * 2020-12-31 2021-05-18 科华恒盛股份有限公司 辅助电源供电装置及供电系统
CN114115029A (zh) * 2021-11-19 2022-03-01 湖南省邮电规划设计院有限公司 一种智能配电控制器及其控制方法

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CN112117903A (zh) * 2019-06-20 2020-12-22 Abb电力电子公司 单级隔离dc-dc转换器
CN112821539A (zh) * 2020-12-31 2021-05-18 科华恒盛股份有限公司 辅助电源供电装置及供电系统
CN112821539B (zh) * 2020-12-31 2024-01-02 厦门科华数能科技有限公司 辅助电源供电装置及供电系统
CN114115029A (zh) * 2021-11-19 2022-03-01 湖南省邮电规划设计院有限公司 一种智能配电控制器及其控制方法

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