CN111009963A - UPS system and control method thereof - Google Patents

UPS system and control method thereof Download PDF

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Publication number
CN111009963A
CN111009963A CN201911349522.1A CN201911349522A CN111009963A CN 111009963 A CN111009963 A CN 111009963A CN 201911349522 A CN201911349522 A CN 201911349522A CN 111009963 A CN111009963 A CN 111009963A
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China
Prior art keywords
alternating current
target
module
inductor
diode
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CN201911349522.1A
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Chinese (zh)
Inventor
刘琴
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Invt Power Sytem Shenzhen Co ltd
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Invt Power Sytem Shenzhen Co ltd
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Priority to CN201911349522.1A priority Critical patent/CN111009963A/en
Publication of CN111009963A publication Critical patent/CN111009963A/en
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    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
    • 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
    • H02M5/44—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 using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—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 using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—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 using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—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 using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements

Abstract

The application discloses UPS system includes: a rectifying module for converting a target input voltage input to the target UPS into a direct current; the controller is connected with the rectifying module and is used for controlling the rectifying module to execute a first control strategy corresponding to the single-phase alternating current when the target input voltage is the single-phase alternating current so as to convert the single-phase alternating current into direct current by using the rectifying module; or when the target input voltage is three-phase alternating current, controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into direct current by utilizing the rectification module; and the inversion module is connected with the rectification module and the controller and used for converting the direct current into target alternating current so as to supply power to a target load by using the target alternating current. Obviously, through the system, the single-phase alternating current can be rectified and inverted, and the three-phase alternating current can also be rectified and inverted, so that the user experience of a user when the UPS system is used can be improved.

Description

UPS system and control method thereof
Technical Field
The present invention relates to the field of UPS technologies, and in particular, to a UPS system and a control method of the UPS system.
Background
UPS (uninterruptible Power Supply) is a system device that can provide a stable, reliable, high quality Power Supply to a load. When the mains supply is input normally, the UPS can supply the mains supply to the load for use after stabilizing the voltage of the mains supply. Meanwhile, the UPS can also charge the battery in the system; when the utility power is interrupted or the utility power fails, the UPS can immediately supply the direct current power of the battery to the load through the inverter to continuously supply the alternating current power to the load, so that the load can maintain normal operation.
In the prior art, the UPS is classified according to the number of input/output phases and can be classified into three-in three-out, three-in single-out, single-in single-out, and the like. Under different application scenes, a user needs to purchase different types of UPSs according to different application requirements, so that the user experience of the user when the user uses the UPSs is greatly reduced, and meanwhile, the cost is greatly increased due to the fact that the user purchases the different types of UPSs. At present, no effective solution exists for the problem.
Therefore, how to further improve the user experience of the user when using the UPS and reduce the cost is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a UPS system, so as to further improve user experience and reduce cost when a user uses the UPS system. The specific scheme is as follows:
a UPS system, comprising:
a rectifying module for converting a target input voltage input to the target UPS into a direct current;
the controller is connected with the rectifying module and is used for controlling the rectifying module to execute a first control strategy corresponding to the single-phase alternating current when the target input voltage is the single-phase alternating current so as to convert the single-phase alternating current into the direct current by using the rectifying module; or when the target input voltage is three-phase alternating current, controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into the direct current by using the rectification module;
and the inverter module is connected with the rectifier module and the controller and is used for converting the direct current into target alternating current so as to supply power to a target load by using the target alternating current.
Preferably, the controller is specifically an FPGA or an MCU.
Preferably, the rectifying module includes a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first IGBT, a second IGBT, a third IGBT, a fourth IGBT, a fifth IGBT, a sixth IGBT, a first capacitor, and a second capacitor;
wherein a second end of the first inductor is connected to an anode of the first diode and a collector of the first IGBT, a second end of the second inductor is connected to an anode of the second diode and a collector of the second IGBT, a second end of the third inductor is connected to an anode of the third diode and a collector of the third IGBT, an emitter of the first IGBT is connected to a collector of the fourth IGBT, an emitter of the second IGBT is connected to a collector of the fifth IGBT, an emitter of the third IGBT is connected to a collector of the sixth IGBT, an emitter of the fourth IGBT is connected to a second end of the sixth inductor and a cathode of the sixth diode, an emitter of the fifth IGBT is connected to a second end of the fifth inductor and a cathode of the fifth diode, and an emitter of the sixth IGBT is connected to a second end of the fourth inductor and a cathode of the fourth diode, the cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected with the anode of the first capacitor, the cathode of the first capacitor is connected with the anode of the second capacitor, and the cathode of the second capacitor is respectively connected with the anode of the fourth diode, the anode of the fifth diode and the anode of the sixth diode;
correspondingly, the first end of the first inductor, the first end of the second inductor, the first end of the third inductor, the first end of the fourth inductor, the first end of the fifth inductor, and the first end of the sixth inductor together form an input end of the rectifier module, and the anode of the first capacitor and the cathode of the second capacitor together form an output end of the rectifier module.
Preferably, the method further comprises the following steps:
and the first filtering module is connected with the rectifying module and is used for filtering the target input voltage.
Preferably, the method further comprises the following steps:
and the second filtering module is connected with the inversion module and is used for filtering the target alternating current.
Preferably, the method further comprises the following steps:
and the storage battery is used for supplying power to the target load when the target input voltage is abnormal.
Preferably, the method further comprises the following steps:
and the charging circuit is connected with the rectifying module and used for charging the storage battery when the target input voltage is normal.
Preferably, the method further comprises the following steps:
and the manual bypass is used for performing manual maintenance on the target UPS.
Preferably, the method further comprises the following steps:
and the static bypass is used for supplying power to the target load when the target UPS fails.
Correspondingly, the invention also discloses a control method of the UPS system, which is applied to the controller in the UPS system and comprises the following steps:
when the target input voltage is single-phase alternating current, controlling the rectification module to execute a first control strategy corresponding to the single-phase alternating current so as to convert the single-phase alternating current into the direct current by using the rectification module; or when the target input voltage is three-phase alternating current, controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into the direct current by using the rectification module.
It can be seen that, in the present invention, a target input voltage input to a target UPS is first converted into a direct current by using a rectification module, and when the target input voltage is a single-phase alternating current, the rectification module is controlled by using a controller to execute a first control strategy corresponding to the single-phase alternating current so as to convert the single-phase alternating current into the direct current by using the rectification module; or when the target input voltage is three-phase alternating current, the controller is used for controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into direct current by the rectification module; and then, converting the direct current output by the rectifier into target alternating current by using an inverter so as to supply power to a target load by using the target alternating current. Obviously, in the UPS system provided by the invention, the single-phase alternating current can be rectified and inverted, and the three-phase alternating current can be rectified and inverted, so that users do not need to purchase different types of UPS systems to adapt to different application scenes, the user experience of the users when using the UPS system can be further improved, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a block diagram of a control apparatus of a UPS system according to an embodiment of the present invention;
fig. 2 is a block diagram of another control apparatus of a UPS system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a structural diagram of a UPS system according to an embodiment of the present invention, the UPS system includes:
a rectification module 11 for converting a target input voltage input to the target UPS into a direct current;
the controller 12 is connected with the rectifying module 11 and is used for controlling the rectifying module 11 to execute a first control strategy corresponding to the single-phase alternating current when the target input voltage is the single-phase alternating current so as to convert the single-phase alternating current into direct current by using the rectifying module 11; or when the target input voltage is three-phase alternating current, controlling the rectification module 11 to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into direct current by using the rectification module 11;
and the inverter module 13 is connected with the rectifier module 11 and the controller 12 and is used for converting the direct current into target alternating current so as to supply power to a target load by using the target alternating current.
In this embodiment, a novel UPS system is provided, which can be applied in a single-phase ac application scenario or a three-phase ac application scenario. Specifically, the UPS system includes a rectification module 11, a controller 12, and an inversion module 13.
During the operation of the UPS system, the controller 12 may determine whether the target input voltage input to the target UPS is a single-phase ac power or a three-phase ac power by detecting parameters such as an effective voltage value, a frequency, and a phase relationship among the target input voltages input to the target UPS.
When the controller 12 determines that the target input voltage input to the target UPS is single-phase ac, the controller 12 controls the rectification module 11 to execute a first control strategy corresponding to the single-phase ac, that is, the controller 12 controls the operation mode of the rectification module 11 according to the input mode of the single-phase ac, so as to convert the single-phase ac input to the target UPS into dc by using the rectification module 11; if the controller 12 determines that the target input voltage input to the target UPS is three-phase ac power, the controller 12 controls the rectification module 11 to execute a second control strategy corresponding to the three-phase ac power, that is, the controller 12 controls the operation mode of the rectification module 11 according to the input mode of the three-phase ac power, so that the rectification module 11 can convert the three-phase ac power input to the target UPS into dc power.
When the rectifier module 11 converts the target input voltage input to the target UPS into dc power, the inverter module 13 converts the dc power output by the rectifier module 11 into target ac power to supply power to the target load with the target ac power.
It should be noted that, in this embodiment, the first control strategy refers to three single-phase power factor correction control strategies, that is, by controlling the switching tube, the single-phase ac power input to the controller is boosted to a stable positive and negative dc bus voltage, and at the same time, the input current is made to track the input voltage phase, so as to obtain a high input power factor, and the same control algorithm and the same input voltage reference phase are executed on the three-phase circuit; the second control strategy is a three-phase six-switch power factor correction control strategy, that is, three-phase alternating current input to the controller is boosted to stable positive and negative direct current bus voltage through the control of the switch tube, and meanwhile, three-phase input current is enabled to track respective input voltage phases respectively, so as to obtain a high input power factor.
In addition, in the embodiment, when the single-phase alternating current and the three-phase alternating current are switched, the operator does not need to set and switch the target UPS again, so that the stability of the inverter module 13 in outputting the target alternating current is not affected, and the stability of the target UPS in supplying power to the target load can be further improved. Moreover, by utilizing the UPS system provided by the embodiment, workers do not need to purchase different types of UPS systems according to different application scenes, so that the overall cost of purchasing the UPS system can be relatively reduced.
In this embodiment, it can be seen that, firstly, the rectifier module is utilized to convert the target input voltage input to the target UPS into the direct current, and when the target input voltage is the single-phase alternating current, the controller is utilized to control the rectifier module to execute the first control strategy corresponding to the single-phase alternating current so as to convert the single-phase alternating current into the direct current; or when the target input voltage is three-phase alternating current, the controller is used for controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into direct current by the rectification module; and then, converting the direct current output by the rectifier into target alternating current by using an inverter so as to supply power to a target load by using the target alternating current. Obviously, in the UPS system provided by this embodiment, both single-phase ac power can be rectified and inverted, and three-phase ac power can also be rectified and inverted, so that the user does not need to purchase different types of UPS systems to adapt to different application scenarios, and thus the user experience of the user when using the UPS system can be further improved, and the cost is reduced.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, and as a preferred implementation, the controller 12 is specifically an FPGA or an MCU.
In this implementation, the controller 12 may be configured as an FPGA (Field Programmable Gate Array), and the FPGA is a hardware logic circuit composed of hardware resources such as a logic unit, an ARM (Advanced RISC Machines, ARM processors), and a multiplier, so the FPGA has an extremely fast parallel logic computation capability. Obviously, when the controller 12 is configured as an FPGA, the conversion speed of the rectifier module 11 in converting the target input voltage into the direct current can be further increased.
Besides the controller 12 being configured as an FPGA, the controller 12 may be configured as an MCU (micro controller Unit), because the MCU has the advantages of small size and low price besides the logic computing capability, when the controller 12 is configured as an MCU, the space occupation and the design cost of the controller 12 can be relatively reduced.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 2, and fig. 2 is a structural diagram of another UPS system provided by the embodiment of the present invention. Specifically, the rectifier module 11 includes a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a fifth inductor L5, a sixth inductor L6, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a first IGBTQ1, a second IGBTQ2, a third IGBTQ3, a fourth IGBTQ4, a fifth IGBTQ5, a sixth IGBTQ6, a first capacitor C01, and a second capacitor C02;
wherein, the second end of the first inductor L1 is connected with the anode of the first diode D1 and the collector of the first IGBTQ1, respectively, the second end of the second inductor L2 is connected with the anode of the second diode D2 and the collector of the second IGBTQ2, respectively, the second end of the third inductor L3 is connected with the anode of the third diode D3 and the collector of the third IGBTQ3, respectively, the emitter of the first IGBTQ1 is connected with the collector of the fourth IGBTQ4, the emitter of the second IGBTQ2 is connected with the collector of the fifth IGBTQ5, the emitter of the third IGBTQ3 is connected with the collector of the sixth IGBTQ6, the emitter of the fourth IGBTQ4 is connected with the second end of the sixth inductor L6 and the cathode of the sixth diode D6, respectively, the emitter of the fifth igq 5 is connected with the first end of the fifth inductor L5 and the cathode of the fifth diode D5, respectively, and the emitter of the fourth IGBTQ4 is connected with the cathode of the first diode D867, and the cathode of the first diode D1, respectively, The cathode of the second diode D2 and the cathode of the third diode D3 are both connected with the anode of the first capacitor C01, the cathode of the first capacitor C01 is connected with the anode of the second capacitor C02, and the cathode of the second capacitor C02 is respectively connected with the anode of the fourth diode D4, the anode of the fifth diode D5 and the anode of the sixth diode D6;
correspondingly, the first end of the first inductor L1, the first end of the second inductor L2, the first end of the third inductor L3, the first end of the fourth inductor L4, the first end of the fifth inductor L5, and the first end of the sixth inductor L6 together form an input end of the rectifier module 11, and the anode of the first capacitor C01 and the cathode of the second capacitor C02 together form an output end of the rectifier module 11.
In the present embodiment, a specific embodiment of the rectifier module 11 is provided, and the rectifier module 11 can convert a single-phase ac power into a dc power, or can convert a three-phase ac power into a dc power.
Specifically, when the target input voltage input to the target UPS is single-phase alternating current, the input end A, B, C is connected to the same-phase power supply, and the controller 12 controls the rectifier module 11 to control the on or off state of each IGBT on the three bridge arms according to a first control strategy corresponding to the single-phase alternating current; when the target input voltage input to the target UPS is three-phase ac, the input terminals A, B, C, N are respectively connected to the power supply A, B, C, N, and the controller 12 controls the rectifier module 11 to control the on/off states of the IGBTs on the three arms according to a second control strategy corresponding to the three-phase ac, so that the rectifier module 11 can convert the single-phase ac or the three-phase ac into dc.
Referring to fig. 2, the present embodiment further discloses a specific implementation of an inverter module 13, in fig. 2, the inverter module 13 is composed of IGBTQ7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, and Q18, the inverter module 13 can convert the direct current output by the rectifier module 11 into a target alternating current, and when the inverter module 13 converts the direct current output by the rectifier module 11 into the target alternating current, the target alternating current can be used to supply power to a target load.
Obviously, the technical solution provided by this embodiment further ensures the operability of the rectifier module 11 in practical application.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 2, and fig. 2 is a structural diagram of another UPS system provided by the embodiment of the present invention. As a preferred embodiment, the UPS system further includes:
and the first filtering module 14 is connected with the rectifying module 11 and is used for filtering the target input voltage.
It can be understood that in practical applications, ripples or impurities are necessarily present in the target input voltage input to the target UPS, so in the embodiment, the first filtering module 14 is further provided in the UPS system, and the first filtering module 14 is used to filter the target input voltage, so as to improve the power quality of the target input voltage.
Specifically, the first filter module may be configured as an LC filter circuit, and referring to fig. 2, the first filter module 14 in fig. 2 is composed of inductors L01, L02, and L03, and capacitors C1, C2, and C3. Obviously, when the first filtering module 14 is used to filter the target input voltage, the power quality of the target input voltage can be relatively improved.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 2, and fig. 2 is a structural diagram of another UPS system provided by the embodiment of the present invention. As a preferred embodiment, the UPS system further includes:
and the second filtering module 15 is connected with the inversion module 13 and is used for filtering the target alternating current.
It can be understood that, in the process of converting the direct current into the target alternating current by the inverter module 13, ripples and impurities are certainly present in the target alternating current, so that the quality of the target alternating current output by the inverter module 13 is affected. Therefore, in the present embodiment, a second filtering module 15 for filtering the target alternating current is further provided in the UPS system, that is, the second filtering module 15 is used to filter out the impurity interference in the target alternating current.
Specifically, the second filtering module may be configured as an LC filtering circuit, please refer to fig. 2, in fig. 2, the second filtering module 15 is composed of inductors L04, L05, L06, capacitors C4, C5, and C6, and the LC filtering circuit may filter the target alternating current output by the inverter module 13.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 2, and fig. 2 is a structural diagram of another UPS system provided by the embodiment of the present invention. As a preferred embodiment, the UPS system further includes:
and a battery 16 for supplying power to the target load when the target input voltage is abnormal.
It can be understood that, in an actual application process, if the target input voltage is abnormal, the UPS system cannot normally supply power to the target load, so in this embodiment, in order to avoid the foregoing situation, the storage battery 16 is further disposed in the UPS system, and please refer to the configuration of the storage battery 16 in fig. 2, which is not described in detail herein.
It is conceivable that, when the storage battery 16 is provided in the UPS system, such that an abnormality occurs in the target input voltage, the storage battery 16 performs a discharging operation so that the UPS system outputs a normal target alternating current, whereby a normal operation of the target load can be ensured.
Obviously, the technical scheme provided by the embodiment can further improve the safety of the UPS system in the use process.
As a preferred embodiment, the UPS system further includes:
and the charging circuit 17 is connected with the rectifying module 11 and is used for charging the storage battery when the target input voltage is normal.
In the present embodiment, a charging circuit 17 is also provided in the UPS system, that is, when the target input voltage is normal, the storage battery 16 of the target UPS is charged by the charging circuit 17; when the target input voltage is abnormal, the storage battery 16 is discharged to ensure that the UPS system can normally output the target alternating current.
Referring to fig. 2, the fuse (fuse) F1, the fuse (fuse) F2, the relay (relay) RLY1, the relay (relay) RLY2, the inductor L07, the inductor L08, the IGBTQ19, the IGBTQ20, the capacitor C7, the capacitor C8, the capacitor C9, and the capacitor C10 in fig. 2 form a charging circuit together. Specifically, in practical applications, the storage battery 16 in the UPS system is connected to the BATT +, BATT-N terminals, and this is set to charge the storage battery 16 through the charger when the target input voltage is normal. When the charging circuit 17 needs the storage battery 16 to discharge, the switching tubes S7, S8, S9, S10, S11 and S12 are closed to supply power to the target UPS by using the storage battery 16; when the power supply of the storage battery 16 is not required, the switching tubes S7, S8, S9, S10, S11 and S12 are turned off, and the storage battery 16 is charged by the charging circuit 17.
Obviously, the technical scheme provided by the embodiment can further improve the overall reliability of the UPS system in the use process.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 2, and fig. 2 is a structural diagram of another UPS system provided by the embodiment of the present invention. As a preferred embodiment, the UPS system further includes:
and a manual bypass 18 for manual maintenance of the target UPS.
In practical application, the UPS system inevitably encounters some unexpected situations or faults during use, so that the UPS system cannot operate normally, and therefore, in this embodiment, in order to facilitate maintenance and handling of the UPS system by workers, a manual bypass 18 is further provided in the UPS system. That is, when the UPS system fails, the worker can repair and handle the UPS system through the manual bypass 18, thereby further improving the safety and reliability of the UPS system during use.
Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 2, and fig. 2 is a structural diagram of another UPS system provided by the embodiment of the present invention. As a preferred embodiment, the UPS system further includes:
and the static bypass 19 is used for supplying power to the target load when the target UPS fails.
In this embodiment, in order to further improve the safety of the UPS system during use, a static bypass 19 is further provided in the UPS system, that is, when the target UPS fails, the UPS system may directly switch to the static bypass 19. It is contemplated that when the UPS system is switched to the static bypass 19, the static bypass 19 may directly supply power to the target load, thereby avoiding the problem of the target load being unable to be used properly due to the inability to supply power. Obviously, by the technical scheme provided by the embodiment, the overall execution efficiency of the UPS system in the use process can be further improved.
Correspondingly, the embodiment of the invention also discloses a control method of the UPS system, which is applied to the controller in the UPS system, and comprises the following steps:
when the target input voltage is single-phase alternating current, controlling the rectification module to execute a first control strategy corresponding to the single-phase alternating current so as to convert the single-phase alternating current into direct current by utilizing the rectification module; or when the target input voltage is three-phase alternating current, controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into direct current by using the rectification module.
Based on the UPS system disclosed in the above embodiment, in this embodiment, a control method applied to the UPS system is also disclosed. Specifically, when the controller detects that the target input voltage input to the target UPS is single-phase alternating current, the controller controls the rectifier module to execute a first control strategy corresponding to the single-phase alternating current, that is, the on-off state of each bridge arm in the rectifier module is controlled according to the input mode of the single-phase alternating current, so that the rectifier module can convert the single-phase alternating current into direct current.
When the controller detects that the target input voltage input to the target UPS is three-phase alternating current, the controller controls the rectification module to execute a second control strategy corresponding to the three-phase alternating current, namely, the on-off state of each bridge arm in the rectification module is controlled according to the input mode of the three-phase alternating current, so that the rectification module can convert the three-phase alternating current into direct current.
Obviously, according to the technical scheme provided by the embodiment, the UPS system can be applied to a single-phase alternating current application scenario, and can also be applied to a three-phase alternating current application scenario, so that the user experience of a user when using the UPS system can be significantly improved.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The UPS system and the control method of the UPS system provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained herein by applying specific examples, and the description of the above examples is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A UPS system, comprising:
a rectifying module for converting a target input voltage input to the target UPS into a direct current;
the controller is connected with the rectifying module and is used for controlling the rectifying module to execute a first control strategy corresponding to the single-phase alternating current when the target input voltage is the single-phase alternating current so as to convert the single-phase alternating current into the direct current by using the rectifying module; or when the target input voltage is three-phase alternating current, controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into the direct current by using the rectification module;
and the inverter module is connected with the rectifier module and the controller and is used for converting the direct current into target alternating current so as to supply power to a target load by using the target alternating current.
2. The UPS system of claim 1, wherein the controller is embodied as an FPGA or an MCU.
3. The UPS system of claim 1, wherein the rectifier module comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first IGBT, a second IGBT, a third IGBT, a fourth IGBT, a fifth IGBT, a sixth IGBT, a first capacitor, and a second capacitor;
wherein a second end of the first inductor is connected to an anode of the first diode and a collector of the first IGBT, a second end of the second inductor is connected to an anode of the second diode and a collector of the second IGBT, a second end of the third inductor is connected to an anode of the third diode and a collector of the third IGBT, an emitter of the first IGBT is connected to a collector of the fourth IGBT, an emitter of the second IGBT is connected to a collector of the fifth IGBT, an emitter of the third IGBT is connected to a collector of the sixth IGBT, an emitter of the fourth IGBT is connected to a second end of the sixth inductor and a cathode of the sixth diode, an emitter of the fifth IGBT is connected to a second end of the fifth inductor and a cathode of the fifth diode, and an emitter of the sixth IGBT is connected to a second end of the fourth inductor and a cathode of the fourth diode, the cathode of the first diode, the cathode of the second diode and the cathode of the third diode are connected with the anode of the first capacitor, the cathode of the first capacitor is connected with the anode of the second capacitor, and the cathode of the second capacitor is respectively connected with the anode of the fourth diode, the anode of the fifth diode and the anode of the sixth diode;
correspondingly, the first end of the first inductor, the first end of the second inductor, the first end of the third inductor, the first end of the fourth inductor, the first end of the fifth inductor, and the first end of the sixth inductor together form an input end of the rectifier module, and the anode of the first capacitor and the cathode of the second capacitor together form an output end of the rectifier module.
4. The UPS system of claim 1, further comprising:
and the first filtering module is connected with the rectifying module and is used for filtering the target input voltage.
5. The UPS system of claim 1, further comprising:
and the second filtering module is connected with the inversion module and is used for filtering the target alternating current.
6. The UPS system of claim 1, further comprising:
and the storage battery is used for supplying power to the target load when the target input voltage is abnormal.
7. The UPS system of claim 6, further comprising:
and the charging circuit is connected with the rectifying module and used for charging the storage battery when the target input voltage is normal.
8. The UPS system of claim 1, further comprising:
and the manual bypass is used for performing manual maintenance on the target UPS.
9. The UPS system of any one of claims 1 to 8, further comprising:
and the static bypass is used for supplying power to the target load when the target UPS fails.
10. A control method of a UPS system, applied to the controller of the UPS system of any one of claims 1 to 9, comprising:
when the target input voltage is single-phase alternating current, controlling the rectification module to execute a first control strategy corresponding to the single-phase alternating current so as to convert the single-phase alternating current into the direct current by using the rectification module; or when the target input voltage is three-phase alternating current, controlling the rectification module to execute a second control strategy corresponding to the three-phase alternating current so as to convert the three-phase alternating current into the direct current by using the rectification module.
CN201911349522.1A 2019-12-24 2019-12-24 UPS system and control method thereof Pending CN111009963A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6175311B1 (en) * 2000-02-17 2001-01-16 Digipower Manufacturing Inc. On-line UPS controllable from far end
CN101295934A (en) * 2007-04-28 2008-10-29 力博特公司 Uninterrupted power supply with wide range of input voltage
CN201374571Y (en) * 2008-12-29 2009-12-30 北京中创瑞普科技有限公司 Online UPS
US20110227418A1 (en) * 2010-03-18 2011-09-22 American Power Conversion Corporation Ac-to-dc conversion
CN102593945A (en) * 2012-02-20 2012-07-18 华为技术有限公司 Uninterruptible power supply circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6175311B1 (en) * 2000-02-17 2001-01-16 Digipower Manufacturing Inc. On-line UPS controllable from far end
CN101295934A (en) * 2007-04-28 2008-10-29 力博特公司 Uninterrupted power supply with wide range of input voltage
CN201374571Y (en) * 2008-12-29 2009-12-30 北京中创瑞普科技有限公司 Online UPS
US20110227418A1 (en) * 2010-03-18 2011-09-22 American Power Conversion Corporation Ac-to-dc conversion
CN102593945A (en) * 2012-02-20 2012-07-18 华为技术有限公司 Uninterruptible power supply circuit

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