CN114070012B - Control method, device, control equipment and power supply system for preventing reverse filling of bus - Google Patents

Control method, device, control equipment and power supply system for preventing reverse filling of bus Download PDF

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Publication number
CN114070012B
CN114070012B CN202111265670.2A CN202111265670A CN114070012B CN 114070012 B CN114070012 B CN 114070012B CN 202111265670 A CN202111265670 A CN 202111265670A CN 114070012 B CN114070012 B CN 114070012B
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Prior art keywords
bus
voltage
target
power supply
output
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CN114070012A (en
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陈威龙
苏宁焕
陈同有
吕吉炜
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Kehua Data Co Ltd
Zhangzhou Kehua Electric Technology Co Ltd
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Kehua Data Co Ltd
Zhangzhou Kehua Electric Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The invention provides a control method, a device, control equipment and a power supply system for preventing reverse irrigation of a bus. The method comprises the following steps: acquiring an electrical parameter of a target bus; the target bus is a bus in the target power supply module; the target power supply module is a module in a plurality of parallel power supply modules; judging whether the voltage back-filling occurs to the target bus according to the electric parameters; when the voltage back filling of the target bus is judged, obtaining a voltage compensation value of the target bus according to the electric parameter and a predetermined voltage compensation relation; and performing voltage compensation on the target bus according to the voltage compensation value so that the output voltage of the target power supply module is the same as the output voltage of the other power supply modules. The invention can improve the working reliability of the bus.

Description

Control method, device, control equipment and power supply system for preventing reverse filling of bus
Technical Field
The invention relates to the technical field of power supply control, in particular to a busbar anti-backflow control method, device, control equipment and a power supply system.
Background
With the development of power supply technology, a plurality of buses are commonly connected in parallel to supply power to high-power electric equipment.
The parallel buses may differ in output voltage due to the buses having respective output characteristics. The parallel buses have different output voltages, and a bus reverse filling phenomenon can occur, namely, a bus with high output voltage can fill a bus with low output voltage. Long-time busbar reverse irrigation may damage devices, and may affect normal power supply.
In the prior art, a plurality of anti-reflection devices such as diodes are connected in series at the output end of each bus so as to prevent the bus from reverse filling. However, taking the busbar reverse-filling phenomenon of two parallel buses as an example, adopting anti-reverse devices such as a series diode and the like can cause the problem that only a single bus can be output and the normal output of the two parallel buses can not be ensured, so that the normal operation of electric equipment is affected. Namely, the parallel bus reverse irrigation is processed by adopting the prior art, and the normal operation of electric equipment is possible.
Disclosure of Invention
The embodiment of the invention provides a bus anti-reverse-filling control method, device, control equipment and a power supply system, which are used for solving the problem that the normal operation of a bus machine can be affected when the parallel bus anti-reverse-filling is processed by adopting the prior art.
In a first aspect, an embodiment of the present invention provides a busbar anti-reverse-filling control method, including:
acquiring an electrical parameter of a target bus; the target bus is a bus in the target power supply module; the target power supply module is a module in a plurality of parallel power supply modules;
judging whether the voltage back-filling occurs to the target bus according to the electric parameters;
when the voltage back filling of the target bus is judged, obtaining a voltage compensation value of the target bus according to the electric parameter and a predetermined voltage compensation relation;
and performing voltage compensation on the target bus according to the voltage compensation value so that the output voltage of the target power supply module is the same as the output voltage of the other power supply modules.
In one possible implementation, the electrical parameters include output voltage, output current, bus voltage, and bus given voltage; the predetermined voltage compensation relation is:
ΔU＝K1*|Uout*Iout|+K2*|Ubus_ref-Ubus_fdb|
Wherein Δu is a voltage compensation value, U out is an output voltage, I out is an output current, U bus_ref is a bus given voltage, U bus_fdb is a bus voltage, K 1 is a first coefficient, and K 2 is a second coefficient; wherein K 1、K2 is greater than zero.
In one possible implementation, the electrical parameters include an output voltage and an output current; judging whether the voltage back-filling occurs to the target bus according to the electric parameters, comprising:
Calculating the output power of the target bus according to the output voltage and the output current;
if the output power is smaller than the preset power value, determining that the voltage back filling occurs to the target bus.
In one possible implementation, the electrical parameters include bus voltage and bus given voltage; judging whether the voltage back-filling occurs to the target bus according to the electric parameters, comprising:
If the difference value of the bus voltage minus the given bus voltage is larger than the preset difference value, determining that the voltage back filling occurs to the target bus.
In one possible implementation, voltage compensation is performed on the target bus according to the voltage compensation value, including:
Superposing the voltage compensation value on an input parameter of an output voltage ring of the target bus to obtain an output value of the output voltage ring;
And generating a target PWM wave according to the output value, and controlling a target bus according to the target PWM wave.
In a second aspect, an embodiment of the present invention provides a busbar anti-reverse-filling control device, including:
The acquisition unit is used for acquiring the electrical parameters of the target bus; the target bus is a bus in the target power supply module; the target power supply module is a module in a plurality of parallel power supply modules;
The judging unit is used for judging whether the voltage back-filling occurs to the target bus according to the electric parameters;
the calculation unit is used for obtaining a voltage compensation value of the target bus according to the electric parameter and a predetermined voltage compensation relation when the voltage back-filling of the target bus is judged;
And the compensation unit is used for carrying out voltage compensation on the target bus according to the voltage compensation value so as to enable the output voltage of the target power supply module to be the same as the output voltage of the other power supply modules.
In one possible implementation, the electrical parameters include output voltage, output current, bus voltage, and bus given voltage; the predetermined voltage compensation relation is:
ΔU＝K1*|Uout*Iout|+K2*|Ubus_ref-Ubus_fdb|
Wherein Δu is a voltage compensation value, U out is an output voltage, I out is an output current, U bus_ref is a bus given voltage, U bus_fdb is a bus voltage, K 1 is a first coefficient, and K 2 is a second coefficient; wherein K 1、K2 is greater than zero.
In a third aspect, an embodiment of the present invention provides a control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the steps of implementing the bus anti-backflow control method according to the first aspect or any one of the possible implementations of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a power supply system, including a plurality of power supply modules connected in parallel and a control device according to the above third aspect; the plurality of parallel power modules are controlled by the control equipment;
For each power module, the power module comprises an AC/DC unit and a DC/AC unit which are sequentially connected; wherein, a bus is arranged between the output end of the AC/DC unit and the input end of the DC/AC unit; both the AC/DC unit and the DC/AC unit are controlled by the control device.
In a fifth aspect, an embodiment of the present invention provides a computer readable storage medium, where a computer program is stored, where the computer program, when executed by a processor, implements the steps of the bus anti-reverse-filling control method according to the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the invention provides a bus anti-reverse irrigation control method, a device, control equipment and a power supply system, wherein the electric parameters of a target bus are obtained; judging whether voltage back filling occurs to the target bus; when the voltage back-filling occurs to the target bus, a voltage compensation value is calculated, the voltage compensation is carried out to the target bus according to the voltage compensation value, the voltage back-filling of the target bus is finally eliminated, the normal output of the target power supply module is ensured, the hardware devices related to the bus due to the voltage back-filling damage can be avoided, the service life of the bus is prolonged, the normal output of each bus can be ensured, and the working reliability of the bus is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an application scenario diagram provided by an embodiment of the present invention;
FIG. 2 is a flow chart of an implementation of a busbar anti-reverse-filling control method provided by an embodiment of the invention;
FIG. 3 is a schematic diagram of a loop of an output voltage ring according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a busbar anti-reverse-filling control device according to an embodiment of the present invention;
Fig. 5 is a schematic diagram of a control device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
The busbar anti-reverse-filling control method of the embodiment of the invention is mainly applied to the situation that a plurality of busbars are connected in parallel, and can be used for connecting direct current busbars in parallel or connecting alternating current busbars in parallel.
For example, for a power module machine, it includes a plurality of power modules connected in parallel. Each power module has the same structure. For each power module, it may include one or more voltage conversion units, which may include an AC/DC unit, an AC/AC unit, a DC/DC unit, a DC/AC unit. Depending on the number and kind of voltage cells involved, there may be at least four configurations of the power supply module:
first, when the power module includes only an AC/DC unit or a DC/DC unit, the bus type of the power module is a direct current bus.
Second, when the power module includes only a DC/AC unit or an AC/AC unit, the bus type of the power module is an AC bus.
Third, the power module comprises an AC/DC unit and a DC/AC unit which are sequentially connected, wherein a direct current bus of the power module is arranged between the output end of the AC/DC unit and the input end of the DC/AC unit.
Fourth, the power module comprises a DC/AC unit and an AC/DC unit which are sequentially connected, wherein an alternating current bus of the power module is arranged between the output end of the DC/AC unit and the input end of the AC/DC unit.
For the rest of the combined cases, refer to the above case, and are not described in detail.
According to at least the above four cases, it can be seen that the embodiment of the present invention is mainly applied to the case where a plurality of bus bars are connected in parallel.
Referring to fig. 1, an application scenario diagram provided by an embodiment of the present invention is shown.
As shown in fig. 1, a power module machine may include N power modules, where the N power modules are connected in parallel to supply power to electrical devices. Including power module D1, power module D2, &..the power module Dn. The power supply module D1 includes an AC/DC unit P01 and a DC/AC unit Q01 connected in series, the power supply module D2 includes an AC/DC unit P02 and a DC/AC unit Q02 connected in series, and the power supply module Dn includes an AC/DC unit P0n and a DC/AC unit Q0n connected in series.
Taking the power module D1 as an example, a bus of the power module D1 is arranged between an output end of the AC/DC unit P01 and an input end of the DC/AC unit Q01, and the AC/DC unit P01 mostly adopts a vienna topology or a Boost topology. The power module D1 further includes two voltage control loops, namely an input voltage loop and an output voltage loop. The input voltage ring is used for controlling the voltage of the AC/DC unit P01, and the output voltage ring is used for controlling the voltage of the DC/AC unit Q01. In addition, the output voltage of the DC/AC unit P01, that is, the output voltage of the power supply module D1. The AC/DC unit P01 may also be referred to as a rectifying unit P01, and the DC/AC unit Q01 may also be referred to as an inverting unit Q01. The rest power modules are the same.
Referring to fig. 1, the method of the embodiment of the present invention may be described with reference to two parallel buses, taking a power module D1 and a power module D2 as an example, where the power module D1 and the power module D2 may only include an AC/DC unit P01 and an AC/DC unit P02, respectively, and at this time, the buses of the power module D1 and the power module D2 are connected in parallel. From the above, the embodiment of the invention can be applied to the case of parallel connection of a plurality of buses.
Referring to fig. 2, a flowchart of an implementation of a busbar anti-backflow control method according to an embodiment of the present invention is shown. As shown in fig. 2, a method for controlling the back-filling prevention of a bus bar may include:
S101, acquiring an electrical parameter of a target bus; the target bus is a bus in the target power supply module; the target power supply module is a module in a plurality of parallel power supply modules;
optionally, a plurality of identical power modules are connected in parallel, each power module is provided with a bus correspondingly, and the buses can be divided into direct current buses or alternating current buses according to different structures of the power modules.
The target bus is a bus in the target power module. In practical application, all the parallel buses can be controlled simultaneously. The embodiment of the invention is illustrated by taking the target bus as an example, and the control processes of the other buses are the same.
The electrical parameters of the target bus may be real-time electrical parameters such as input voltage, input current, output voltage, output current, bus voltage, etc. The electrical parameter of the target bus may also be a given electrical parameter of the input voltage ring, and a given electrical parameter of the output voltage ring, for example, a given electrical parameter of the input given voltage, the bus given voltage, and the like. Wherein, the real-time electric parameter can be obtained through acquisition, and the given electric parameter can be directly obtained.
S102, judging whether voltage back-filling occurs to a target bus according to the electrical parameters;
Optionally, whether the voltage back-filling occurs to the target bus can be judged according to the real-time electric parameter and the given electric parameter.
By way of example, it may be determined whether or not voltage back-filling of the target bus is likely to occur by comparing the output voltage of the target bus with the output voltages of the remaining buses. And whether the voltage back-filling occurs to the target bus can be judged through other electric parameters.
S103, when the voltage back filling of the target bus is judged, obtaining a voltage compensation value of the target bus according to the electric parameter and a predetermined voltage compensation relation;
Optionally, when the voltage of the target bus is reversed, the output voltage of the target bus is lower than the output voltages of the other buses, so that the output voltage of the target bus needs to be raised, and the voltage compensation value of the target bus can be calculated according to the electric parameter and a predetermined voltage compensation relation. The predetermined voltage compensation relation may be used to calculate a voltage compensation value, where the voltage compensation value may represent, to some extent, a voltage value that the output voltage of the target power supply module needs to be raised.
And S104, performing voltage compensation on the target bus according to the voltage compensation value so that the output voltage of the target power supply module is the same as the output voltage of the other power supply modules.
Optionally, voltage compensation may be performed on the target bus where voltage back-filling occurs according to the voltage compensation value, so as to raise the output voltage of the target power module, so that the output voltage of the target power module is the same as the output voltages of the other power modules. The same meaning that the output voltage of the target power module is completely equal to the output voltages of the other power modules. Or the difference value between the output voltage of the target power supply module and the output voltage of the rest power supply modules is in a certain range, and although the output voltage of the target power supply module is not equal to the output voltage of the rest power supply modules, the bus bars of the rest power supply modules cannot back-irrigate the target bus bar voltage of the target power supply module, and the target bus bars of the target power supply modules cannot back-irrigate the bus bar voltage of the rest power supply modules. I.e. the output voltage of the target power supply module may fluctuate within a certain range.
According to the embodiment of the invention, the electric parameters of the target bus are obtained; judging whether voltage back filling occurs to the target bus; when the voltage back-filling occurs to the target bus, a voltage compensation value is calculated, the voltage compensation is carried out to the target bus according to the voltage compensation value, the voltage back-filling of the target bus is finally eliminated, the normal output of the target power supply module is ensured, the hardware devices related to the bus due to the voltage back-filling damage can be avoided, the service life of the bus is prolonged, and meanwhile, the working reliability of the bus can be improved.
In some embodiments of the invention, the electrical parameters include output voltage, output current, bus voltage, and bus given voltage; the predetermined voltage compensation relation is:
ΔU＝K1*|Uout*Iout|+K2*|Ubus_ref-Ubus_fdb|
Wherein Δu is a voltage compensation value, U out is an output voltage, I out is an output current, U bus_ref is a bus given voltage, U bus_fdb is a bus voltage, K 1 is a first coefficient, and K 2 is a second coefficient; wherein K 1、K2 is greater than zero.
Optionally, the product of U out and I out is the output power of the target bus, and when the voltage of the target bus is reversed, the output voltage and the output current of the target bus are reversed, that is, the output power of the target bus is negative. While the bus voltage of the target bus would be greater than the given bus voltage. The first coefficient K 1 can be dynamically adjusted according to the output power, and the second coefficient K 2 can be dynamically adjusted according to the difference between the bus voltage and the given bus voltage. I.e. the first coefficient K 1 and the second coefficient K 2 are adjusted according to practical experience.
Illustratively, the adjustment of the target bus may be as follows:
for example: when the voltage of the target bus is reversely irrigated, the output power of the target bus is-0.2 kW, the absolute value is taken to be 0.2kW, the difference between the bus voltage and the given voltage of the bus is 5V, and the voltage compensation value obtained through calculation of the voltage compensation relation is 0.2V.
For another example: when the voltage of the target bus is reversely irrigated, the output power of the target bus is-0.6 kW, the absolute value is taken to be 0.6kW, the difference between the bus voltage and the given voltage of the bus is 10V, and the voltage compensation value obtained through calculation of the voltage compensation relation is 0.7V.
The voltage compensation value in each case can be obtained by means of a look-up table.
In some embodiments of the invention, the electrical parameters include output voltage and output current; judging whether the voltage back-filling occurs to the target bus according to the electric parameters, comprising:
Calculating the output power of the target bus according to the output voltage and the output current;
if the output power is smaller than the preset power value, determining that the voltage back filling occurs to the target bus.
Optionally, if the output power is greater than the preset power value, it is determined that no voltage back-filling occurs in the target bus.
The preset power value may be set according to actual situations, for example, the preset power value is zero. And when the output power of the target bus is smaller than zero, determining that the voltage back filling occurs to the target bus. And judging that the voltage back filling of the target bus does not occur when the output power of the target bus is larger than zero.
In some embodiments of the invention, the electrical parameters include bus voltage and bus-given voltage; judging whether the voltage back-filling occurs to the target bus according to the electric parameters, comprising:
If the difference value of the bus voltage minus the given bus voltage is larger than the preset difference value, determining that the voltage back filling occurs to the target bus.
Optionally, if the difference of the bus voltage minus the given bus voltage is less than or equal to the preset difference, determining that the voltage back-filling does not occur on the target bus.
When the voltage of the target bus is reversed, the bus voltage of the target bus is increased, so that whether the voltage of the target bus is reversed or not can be judged by judging whether the voltage of the target bus is reversed or not when the difference between the voltage of the bus and the given voltage of the bus is larger than a preset difference. The preset difference may be set according to actual needs, for example, the preset difference may be zero.
In some embodiments of the invention, voltage compensating the target bus according to the voltage compensation value includes:
Superposing the voltage compensation value on an input parameter of an output voltage ring of the target bus to obtain an output value of the output voltage ring;
And generating a target PWM wave according to the output value, and controlling a target bus according to the target PWM wave.
Referring to fig. 3, a schematic loop diagram of an output voltage ring according to an embodiment of the present invention is shown. In fig. 3, U peak represents the output voltage peak value of the target bus, Δu is the voltage compensation value, sin θ is the sinusoidal component of the output voltage peak value, I out is the output current, uinv is the output voltage of the DC/AC unit of the target bus (i.e., the output voltage U out of the target bus is the same), U bus is the bus voltage, and modulator is modulation.
The voltage compensation value is superimposed on the input parameter of the output voltage ring, the target PWM wave is obtained through calculation of the output voltage ring, the target bus is controlled by the target PWM wave, and the output voltage is raised, so that the output voltage of the target bus is identical with the output voltages of other buses, and the reverse filling voltage is prevented.
The embodiment of the invention has the beneficial effects that: the device of the surface bus can prevent a plurality of buses connected in parallel from generating voltage reverse irrigation, trigger overvoltage protection, ensure normal power supply to electric equipment, prolong the service life of the buses and improve the working reliability of the buses.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 4 shows a schematic structural diagram of a busbar anti-reverse-filling control device according to an embodiment of the present invention, and for convenience of explanation, only the parts related to the embodiment of the present invention are shown, which are described in detail below:
As shown in fig. 4, the busbar anti-reverse-filling control device 20 may include:
An acquisition unit 201 for acquiring an electrical parameter of a target bus; the target bus is a bus in the target power supply module; the target power supply module is a module in a plurality of parallel power supply modules;
a judging unit 202, configured to judge whether voltage back-filling occurs to the target bus according to the electrical parameter;
A calculating unit 203, configured to obtain a voltage compensation value of the target bus according to the electrical parameter and a predetermined voltage compensation relation when it is determined that the voltage back-filling occurs in the target bus;
And the compensation unit 204 is used for performing voltage compensation on the target bus according to the voltage compensation value so that the output voltage of the target power supply module is the same as the output voltages of the other power supply modules.
In some embodiments of the invention, the electrical parameters include output voltage, output current, bus voltage, and bus given voltage; the predetermined voltage compensation relation is:
ΔU＝K1*|Uout*Iout|+K2*|Ubus_ref-Ubus_fdb|
Wherein Δu is a voltage compensation value, U out is an output voltage, I out is an output current, U bus_ref is a bus given voltage, U bus_fdb is a bus voltage, K 1 is a first coefficient, and K 2 is a second coefficient; wherein K 1、K2 is greater than zero.
In some embodiments of the invention, the electrical parameters include output voltage and output current; the judging unit 202 may include:
a calculating subunit for calculating the output power of the target bus according to the output voltage and the output current;
And the first judging subunit is used for judging that the voltage back filling occurs to the target bus if the output power is smaller than the preset power value.
In some embodiments of the invention, the electrical parameters include bus voltage and bus-given voltage; the judging unit 202 may further include:
And the second judging subunit is used for judging that the target bus generates voltage back filling if the difference value of the bus voltage minus the given bus voltage is larger than the preset difference value.
In some embodiments of the present invention, the compensation unit 204 may include:
The superposition subunit is used for superposing the voltage compensation value on the input parameter of the output voltage ring of the target bus to obtain the output value of the output voltage ring;
and the generating subunit is used for generating a target PWM wave according to the output value and controlling the target bus according to the target PWM wave.
Fig. 5 is a schematic diagram of a control device according to an embodiment of the present invention. As shown in fig. 5, the control device 30 of this embodiment includes: a processor 300, a memory 301 and a computer program 302 stored in the memory 301 and executable on the processor 300. The steps of the above-described embodiments of the bus anti-backflow control method are implemented by the processor 300 when executing the computer program 302, for example, S101 to S104 shown in fig. 2. Or the processor 300, when executing the computer program 302, performs the functions of the modules/units of the apparatus embodiments described above, e.g. the functions of the units 201 to 204 shown in fig. 4.
By way of example, the computer program 302 may be partitioned into one or more modules/units, which are stored in the memory 301 and executed by the processor 300 to accomplish the present invention. One or more of the modules/units may be a series of computer program instruction segments capable of performing particular functions for describing the execution of the computer program 302 in the control device 30. For example, the computer program 302 may be split into the units 201 to 204 shown in fig. 4.
The control device 30 may be a computing device such as a desktop computer, a notebook computer, a palm computer, and a cloud server. Control device 30 may include, but is not limited to, a processor 300, a memory 301. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the control device 30 and is not meant to be limiting of the control device 30, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the control device may also include an input-output device, a network access device, a bus, etc.
The Processor 300 may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 301 may be an internal storage unit of the control device 30, such as a hard disk or a memory of the control device 30. The memory 301 may also be an external storage device of the control device 30, such as a plug-in hard disk provided on the control device 30, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD), or the like. Further, the memory 301 may also include both an internal storage unit and an external storage device of the control device 30. The memory 301 is used to store computer programs and other programs and data required to control the device. The memory 301 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The embodiment of the invention also provides a power supply system, which comprises a plurality of buses connected in parallel and the control equipment 30; the plurality of parallel power modules are all controlled by the control device 30;
For each power module, the power module comprises an AC/DC unit and a DC/AC unit which are sequentially connected; wherein, a bus is arranged between the output end of the AC/DC unit and the input end of the DC/AC unit; both the AC/DC unit and the DC/AC unit are controlled by the control device 30.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/control device and method may be implemented in other manners. For example, the apparatus/control device embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the foregoing embodiment, or may be implemented by a computer program for instructing related hardware, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the foregoing embodiments of the method for controlling bus bar anti-backflow control when executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims (8)

1. The bus anti-reverse irrigation control method is characterized by comprising the following steps of:
Acquiring an electrical parameter of a target bus; the target bus is a bus in the target power supply module; the target power supply module is one of a plurality of power supply modules connected in parallel;
judging whether the voltage back-filling occurs to the target bus according to the electric parameters;
when the voltage back filling of the target bus is judged, obtaining a voltage compensation value of the target bus according to the electric parameter and a predetermined voltage compensation relation;
Performing voltage compensation on the target bus according to the voltage compensation value so that the output voltage of the target power supply module is the same as the output voltages of the other power supply modules;
the electrical parameters include output voltage, output current, bus voltage and bus given voltage; the predetermined voltage compensation relation is:
ΔU＝K1*|Uout*Iout|+K2*|Ubus_ref-Ubus_fdb|
Wherein Δu is the voltage compensation value, U out is the output voltage, I out is the output current, U bus_ref is the bus given voltage, U bus_fdb is the bus voltage, K 1 is a first coefficient, and K 2 is a second coefficient; wherein K 1、K2 is greater than zero.
2. The busbar anti-reverse-filling control method according to claim 1, wherein the electrical parameters include an output voltage and an output current; the step of judging whether the voltage back-filling occurs to the target bus according to the electrical parameter comprises the following steps:
Calculating the output power of the target bus according to the output voltage and the output current;
and if the output power is smaller than the preset power value, determining that the voltage back filling occurs to the target bus.
3. The bus anti-reverse-filling control method according to claim 1, wherein the electrical parameters include a bus voltage and a bus given voltage; the step of judging whether the voltage back-filling occurs to the target bus according to the electrical parameter comprises the following steps:
and if the difference value of the bus voltage minus the given bus voltage is larger than a preset difference value, determining that the voltage back filling occurs to the target bus.
4. A bus bar anti-reverse-filling control method according to any one of claims 1 to 3, characterized in that the voltage compensation of the target bus bar according to the voltage compensation value includes:
The voltage compensation value is overlapped on the input parameter of the output voltage ring of the target bus to obtain the output value of the output voltage ring;
and generating a target PWM wave according to the output value, and controlling the target bus according to the target PWM wave.
5. The utility model provides a control device is prevented filling by generating line, its characterized in that includes:
the acquisition unit is used for acquiring the electrical parameters of the target bus; the target bus is a bus in the target power supply module; the target power supply module is one of a plurality of power supply modules connected in parallel;
the judging unit is used for judging whether the voltage back filling occurs to the target bus according to the electric parameters;
the calculation unit is used for obtaining a voltage compensation value of the target bus according to the electric parameter and a predetermined voltage compensation relation when the voltage back-filling of the target bus is judged;
the compensation unit is used for carrying out voltage compensation on the target bus according to the voltage compensation value so as to enable the output voltage of the target power supply module to be the same as the output voltage of the other power supply modules;
the electrical parameters include output voltage, output current, bus voltage and bus given voltage; the predetermined voltage compensation relation is:
ΔU＝K1*|Uout*Iout|+K2*|Ubus_ref-Ubus_fdb|
Wherein Δu is the voltage compensation value, U out is the output voltage, I out is the output current, U bus_ref is the bus given voltage, U bus_fdb is the bus voltage, K 1 is a first coefficient, and K 2 is a second coefficient; wherein K 1、K2 is greater than zero.
6. A control device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the busbar anti-backflushing control method according to any one of the preceding claims 1 to 4.
7. A power supply system comprising a plurality of power supply modules connected in parallel and the control device of claim 6; the plurality of parallel power supply modules are controlled by the control equipment;
for each power module, the power module comprises an AC/DC unit and a DC/AC unit which are sequentially connected; wherein, a bus is arranged between the output end of the AC/DC unit and the input end of the DC/AC unit; the AC/DC unit and the DC/AC unit are controlled by the control device.
8. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the busbar anti-reverse-filling control method according to any one of claims 1 to 4.
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