CN112234702A - Power supply device and UPS - Google Patents
Power supply device and UPS Download PDFInfo
- Publication number
- CN112234702A CN112234702A CN202011061618.0A CN202011061618A CN112234702A CN 112234702 A CN112234702 A CN 112234702A CN 202011061618 A CN202011061618 A CN 202011061618A CN 112234702 A CN112234702 A CN 112234702A
- Authority
- CN
- China
- Prior art keywords
- positive
- negative
- current bus
- direct current
- half cycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention is suitable for the technical field of power electronics, and provides a power supply device and a UPS, wherein the power supply device comprises: the bidirectional converter comprises a first bipolar conversion module, a positive direct current bus, a negative direct current bus, a bidirectional converter and a main control module; the first end of the bidirectional converter is connected with the positive direct-current bus, and the second end of the bidirectional converter is connected with the negative direct-current bus; the main control module is used for controlling the bidirectional converter to realize electric energy transmission between the positive direct-current bus and the negative direct-current bus according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the effective value of the positive half cycle input current of the first bipolar conversion module to be the same as the effective value of the negative half cycle input current. This application accessible bidirectional converter when load is unbalanced realizes the electric energy exchange between positive direct current bus and the negative direct current bus for positive half cycle input current and the negative half cycle input current of first bipolar transformation module reach the equilibrium, thereby reduced the input current ripple, reduced the harmonic pollution, improved UPS's performance.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a power supply device and a UPS.
Background
The bipolar power supply device adopts the bipolar direct current bus for energy supply, and is widely applied to the field of power electronics due to the advantages of high efficiency, small loss, good dynamic characteristic and the like.
In the prior art, when the load of the bipolar power supply device is unbalanced, the positive and negative half-cycle input currents of the pre-stage conversion module are asymmetrical, so that the input current ripples are large, and the input source is polluted greatly.
Disclosure of Invention
In view of this, embodiments of the present invention provide a power supply device and a UPS, so as to solve the problem in the prior art that when a load of a bipolar power supply device is unbalanced, input current ripples are large and an input source is polluted greatly due to imbalance of positive and negative half-cycle input currents.
A first aspect of an embodiment of the present invention provides a power supply apparatus, including: the bidirectional converter comprises a first bipolar conversion module, a positive direct current bus, a negative direct current bus, a bidirectional converter and a main control module;
the first bipolar transformation module is connected with a first end of an external power supply at a first input end, and connected with a second end of the external power supply at a second input end;
a first output end and a second output end of the first bipolar conversion module respectively supply power to a load through a positive direct current bus and a negative direct current bus;
the first end of the bidirectional converter is connected with the positive direct-current bus, and the second end of the bidirectional converter is connected with the negative direct-current bus;
the main control module is respectively connected with the first bipolar conversion module and the bidirectional converter;
the main control module is used for controlling the bidirectional converter to realize electric energy transmission between the positive direct-current bus and the negative direct-current bus according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the effective value of the positive half cycle input current of the first bipolar conversion module to be the same as the effective value of the negative half cycle input current.
A second aspect provided by an embodiment of the present invention provides a UPS including the power supply apparatus as provided in the first aspect of an embodiment of the present invention.
An embodiment of the present invention provides a power supply apparatus, including: the bidirectional converter comprises a first bipolar conversion module, a positive direct current bus, a negative direct current bus, a bidirectional converter and a main control module; a first output end and a second output end of the first bipolar conversion module respectively supply power to a load through a positive direct current bus and a negative direct current bus; the first end of the bidirectional converter is connected with the positive direct-current bus, and the second end of the bidirectional converter is connected with the negative direct-current bus; the main control module is respectively connected with the first bipolar conversion module and the bidirectional converter; when the power supply unit is loaded with an unbalanced load, the positive and negative half cycle input currents are unbalanced. The main control module transmits redundant electric energy of the positive direct current bus to the negative direct current bus through the bidirectional converter according to the positive half cycle active power of the load and the negative half cycle active power of the load, or transmits redundant electric energy to the positive direct current bus through the negative direct current bus, so that the output of the first bipolar transformation module can still be balanced when the power supply device is in unbalanced load, namely, the positive half cycle input current and the negative half cycle input current of the first bipolar transformation module are balanced, the input current ripple is reduced, the harmonic pollution is reduced, and the performance of the UPS is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a topology of a power supply apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a topology of another power supply 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 particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the 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.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, an embodiment of the present invention provides a power supply apparatus, including: the bidirectional converter comprises a first bipolar conversion module 11, a positive direct current BUS BUS +, a negative direct current BUS BUS-, a bidirectional converter 12 and a main control module 14;
a first bipolar transformation module 11, a first input end of which is connected with a first end of an external power supply, and a second input end of which is connected with a second end of the external power supply;
the first output end and the second output end of the first bipolar transformation module 11 respectively supply power to the load through a positive direct current BUS BUS + and a negative direct current BUS BUS-;
a bidirectional converter 12, a first end of which is connected with a positive DC BUS BUS +, and a second end of which is connected with a negative DC BUS BUS-;
the main control module 14 is respectively connected with the first bipolar transformation module 11 and the bidirectional converter 12;
the main control module 14 is configured to control the bidirectional converter 12 to realize electric energy transfer between the positive dc BUS + and the negative dc BUS according to the positive half cycle active power of the load and the negative half cycle active power of the load, and control the effective value of the positive half cycle input current of the first bipolar conversion module 11 to be the same as the effective value of the negative half cycle input current.
For the bipolar power supply device, when the load is unbalanced, the bus voltage and the input current are easily unbalanced. Because the positive half cycle input current and the negative half cycle input current are in reverse phase, when the positive half cycle input current and the negative half cycle input current are the same, the current ripple is small; if the input current is unbalanced and the difference between the values of the two currents is large, a large current ripple occurs, which affects the performance of the UPS. In the embodiment of the invention, the bidirectional converter 12 is arranged between the positive direct current BUS BUS + and the negative direct current BUS BUS-, the electric energy transmission between the positive direct current BUS BUS + and the negative direct current BUS BUS-is realized through the bidirectional converter 12, and the electric energy of one side BUS without load or light load is transmitted to one side BUS with load, so that the first bipolar conversion module 11 can still keep balanced output when the power supply device is under unbalanced load, namely, the positive half cycle input current and the negative half cycle input current are balanced, thereby effectively reducing the input current ripple, reducing the harmonic pollution and improving the reliability, the stability and the adaptability of the UPS. Meanwhile, the positive direct current BUS BUS + and the negative direct current BUS BUS-can supply energy to the side with load together, the utilization rate of devices of the device is high, and the efficiency of the whole machine is improved.
The first bipolar conversion module 11 is a combinational circuit including a switching device, and can adjust the positive half-cycle input current and the negative half-cycle input current by adjusting the duty ratio.
In some embodiments, referring to fig. 2, the power supply apparatus may further include: a second bipolar conversion module 13;
and a first input end of the second bipolar conversion module 13 is connected with a first output end of the first bipolar conversion module 11 through a positive direct current BUS BUS +, a second input end of the second bipolar conversion module is connected with a second output end of the first bipolar conversion module 11 through a negative direct current BUS BUS-, and the first output end and the second output end supply power for a load.
In some embodiments, the second bipolar conversion module 13 may be a bipolar dc-ac conversion module.
In some embodiments, the main control module 14 may further be connected to the second bidirectional conversion module 13.
In some embodiments, the bidirectional converter 12 may be an isolated bidirectional converter 12 that includes a transformer.
The isolated bidirectional converter comprising the transformer can realize electric energy exchange and can not introduce crosstalk to the positive direct current BUS BUS + and the negative direct current BUS BUS-.
In some embodiments, referring to fig. 2, the power supply apparatus may further include: a first switch K1 and a second switch K2;
the first end of the bidirectional converter 12 comprises: a first positive terminal and a first negative terminal; the second terminal of the bidirectional converter 12 includes: a second positive terminal and a second negative terminal;
the bidirectional converter 12 is provided with a first positive terminal connected with a positive direct current BUS BUS +, a first negative terminal connected with a reference zero point terminal N through a first switch K1, a second positive terminal connected with the reference zero point terminal N through a second switch K2, and a second negative terminal connected with a negative direct current BUS BUS-;
the main control module 14 is further configured to obtain a voltage of the positive dc BUS + and a voltage of the negative dc BUS +, and control the first switch K1 and the second switch K2 to be closed when the voltage of the positive dc BUS + is higher than a first preset voltage or when the voltage of the negative dc BUS is smaller than a second preset voltage.
Because the bidirectional converter 12 is provided with a switch device with an internal diode, an abnormal loop may be formed between the positive direct current BUS BUS + and the negative direct current BUS BUS-, the abnormal loop is conducted instantly, the requirements on the voltage resistance and the current resistance of the device are high, the device may be damaged, and the reliability of the device is reduced. Therefore, the first switch K1 and the second switch K2 are arranged in the embodiment of the invention, and the first switch K1 and the second switch K2 are controlled to prevent an abnormal loop from being formed between the positive direct current BUS BUS + and the negative direct current BUS BUS-, thereby improving the reliability of the device.
In some embodiments, the first switch K1 and the second switch K2 may be connected to the main control module 14.
In some embodiments, controlling the first switch K1 and the second switch K2 to close when the voltage of the positive dc BUS + is higher than a first preset voltage, or when the voltage of the negative dc BUS-is less than a second preset voltage, may include:
step S101: when the voltage of the positive direct current BUS BUS + is higher than a first preset voltage, controlling a first switch K1 to be closed;
step S102: acquiring voltages on two sides of a second switch K2, and if the absolute value of the difference value between the voltages on two sides of the second switch K2 is smaller than a first threshold value, controlling the second switch K2 to be closed;
step S103: when the voltage of the positive direct current BUS BUS + is not higher than a first preset voltage, controlling the first switch K1 and the second switch K2 to be disconnected;
step S104: when the voltage of the negative direct current BUS BUS-is lower than a second preset voltage, controlling a second switch K2 to be closed;
step S105: acquiring voltages on two sides of a first switch K1, and if the absolute value of the voltage difference between the voltages on two sides of the first switch K1 is smaller than a second threshold value, controlling the first switch K1 to be closed;
step S106: when the voltage of the negative direct current BUS BUS-is not lower than the second preset voltage, the first switch K1 and the second switch K2 are controlled to be disconnected.
When the voltage of the positive direct current BUS BUS + is high, the first switch K1 is closed firstly, the preceding stage of the transformer is started slowly, the electric energy of the positive direct current BUS BUS + is transmitted to one end of the second switch K2, then the second switch K2 is closed, and the electric energy of the positive direct current BUS BUS + is transmitted to the negative direct current BUS BUS-. Similarly, when the negative direct current BUS BUS-voltage is high, the second switch K2 is closed first, and then the first switch K1 is closed, so that electric energy transfer is realized. According to the embodiment of the invention, the transformer is slowly started through the first switch K1 and the second switch K2, so that the load voltage is prevented from being pulled down. Meanwhile, when the absolute value of the difference value between the voltages on the two sides of the second switch K2 is smaller than a first threshold value, the second switch K2 is controlled to be closed, or when the absolute value of the difference value between the voltages on the two sides of the first switch K1 is smaller than a second threshold value, the first switch K1 is controlled to be closed, and direct current arc discharge caused by large difference voltage on the two sides of the switch is avoided. The first threshold and the second threshold may be the same or different, and may be set according to actual requirements.
In some embodiments, controlling the bidirectional converter 12 to transfer electric energy between the positive dc BUS + and the negative dc BUS-according to the positive half cycle active power of the load and the negative half cycle active power of the load may include:
step S201: acquiring positive half cycle active power of a load and negative half cycle active power of the load;
step S202: if the positive half cycle active power of the load is larger than the negative half cycle active power of the load, determining an electric energy difference value according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the bidirectional converter 12 to transmit electric energy of the electric energy difference value to the negative direct current BUS from the positive direct current BUS-;
step S203: if the negative half cycle active power of the load is greater than the positive half cycle active power of the load, determining an electric energy difference value according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the bidirectional converter 12 to transmit the electric energy of the electric energy difference value from the negative direct current BUS to the positive direct current BUS +.
In some embodiments, the power difference may be one-half of an absolute value of a difference between the positive half cycle active power of the load and the negative half cycle active power of the load.
The load state is judged according to the active power of the load, and when the power supply device is in an unbalanced load state, the electric energy output by the first bipolar conversion module 11 is distributed to the load through the bidirectional converter 12 according to the actual power of the load. For example, if the positive half cycle active power of the load is 3P and the negative half cycle active power of the load is 7P, the bidirectional converter 12 transfers 2P electric energy from the positive dc BUS + to the negative dc BUS-, so that the positive and negative half cycle output powers of the first bipolar conversion module 11 are both 5P, and input current balance is achieved.
In some embodiments, referring to fig. 2, the power supply apparatus may further include: a positive bus capacitance C1 and a negative bus capacitance C2;
the positive BUS capacitor C1 is connected between the positive direct current BUS BUS + and the reference zero end N;
negative BUS capacitor C2 is connected between the negative dc BUS-and reference zero terminal N.
The connection point of the positive BUS capacitor C1 and the negative BUS capacitor C2 is used as a reference zero point end N, and the positive direct current BUS BUS +, the negative direct current BUS BUS-and the reference zero point end N form a bipolar direct current BUS.
In some embodiments, the first bipolar transformation module 11 may be a bipolar dc boost module.
Corresponding to any one of the above-mentioned conversion circuits, an embodiment of the present invention further provides a UPS power supply, which includes any one of the above-mentioned power supply apparatuses and has advantages of the above-mentioned power supply apparatus, and details thereof are omitted here.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A power supply device, comprising: the bidirectional converter comprises a first bipolar conversion module, a positive direct current bus, a negative direct current bus, a bidirectional converter and a main control module;
the first input end of the first bipolar transformation module is connected with the first end of an external power supply, and the second input end of the first bipolar transformation module is connected with the second end of the external power supply;
a first output end and a second output end of the first bipolar conversion module respectively supply power to a load through the positive direct current bus and the negative direct current bus;
the first end of the bidirectional converter is connected with the positive direct-current bus, and the second end of the bidirectional converter is connected with the negative direct-current bus;
the main control module is respectively connected with the first bipolar conversion module and the bidirectional converter;
the main control module is used for controlling the bidirectional converter to realize electric energy transfer between the positive direct current bus and the negative direct current bus according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the effective value of the positive half cycle input current of the first bipolar conversion module to be the same as that of the negative half cycle input current.
2. The power supply device according to claim 1, characterized in that the power supply device further comprises: a second bipolar transformation module;
and a first input end of the second bipolar conversion module is connected with a first output end of the first bipolar conversion module through the positive direct current bus, a second input end of the second bipolar conversion module is connected with a second output end of the first bipolar conversion module through the negative direct current bus, and the first output end and the second output end supply power for the load.
3. The power supply apparatus according to claim 1, wherein the bidirectional converter is an isolated bidirectional converter including a transformer.
4. The power supply device according to claim 3, characterized in that the power supply device further comprises: a first switch and a second switch;
the first terminal of the bidirectional converter comprises: a first positive terminal and a first negative terminal; the second terminal of the bidirectional converter comprises: a second positive terminal and a second negative terminal;
in the bidirectional converter, a first positive terminal is connected with the positive direct-current bus, a first negative terminal is connected with a reference zero terminal through the first switch, a second positive terminal is connected with the reference zero terminal through the second switch, and a second negative terminal is connected with the negative direct-current bus;
the main control module is further configured to obtain a voltage of the positive direct current bus and a voltage of the negative direct current bus, and control the first switch and the second switch to be closed when the voltage of the positive direct current bus is higher than a first preset voltage or when the voltage of the negative direct current bus is smaller than a second preset voltage.
5. The power supply apparatus according to claim 4, wherein said controlling the first switch and the second switch to be closed when the voltage of the positive dc bus is higher than a first preset voltage or when the voltage of the negative dc bus is less than a second preset voltage comprises:
when the voltage of the positive direct current bus is higher than the first preset voltage, controlling the first switch to be closed;
acquiring voltages on two sides of the second switch, and controlling the second switch to be closed if the absolute value of the difference value between the voltages on the two sides of the second switch is smaller than a first threshold value;
when the voltage of the positive direct current bus is not higher than the first preset voltage, controlling the first switch and the second switch to be switched off;
when the voltage of the negative direct current bus is lower than the second preset voltage, controlling the second switch to be closed;
acquiring voltages at two sides of the first switch, and controlling the first switch to be closed if the absolute value of the voltage difference between the voltages at the two sides of the first switch is smaller than a second threshold value;
and when the voltage of the negative direct current bus is not lower than the second preset voltage, controlling the first switch and the second switch to be switched off.
6. The power supply apparatus according to any one of claims 1 to 5, wherein the controlling the bidirectional converter according to the positive half cycle active power of the load and the negative half cycle active power of the load realizes electric energy transfer between the positive direct current bus and the negative direct current bus comprises:
acquiring positive half cycle active power of the load and negative half cycle active power of the load;
if the positive half cycle active power of the load is greater than the negative half cycle active power of the load, determining an electric energy difference value according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the bidirectional converter to transmit electric energy of the electric energy difference value to the negative direct current bus from the positive direct current bus;
and if the negative half cycle active power of the load is greater than the positive half cycle active power of the load, determining the electric energy difference value according to the positive half cycle active power of the load and the negative half cycle active power of the load, and controlling the bidirectional converter to transmit the electric energy with the electric energy difference value to the positive direct current bus from the negative direct current bus.
7. The power supply apparatus of claim 6, wherein the power difference is one-half of an absolute value of a difference between the positive half cycle active power of the load and the negative half cycle active power of the load.
8. The power supply device according to any one of claims 1 to 5, characterized by further comprising: a positive bus capacitance and a negative bus capacitance;
the positive bus capacitor is connected between the positive direct current bus and a reference zero end;
and the negative bus capacitor is connected between the negative direct current bus and the reference zero end.
9. The power supply apparatus according to any one of claims 1 to 5, wherein the first bipolar conversion module is a bipolar DC boost module.
10. A UPS comprising a power supply apparatus as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011061618.0A CN112234702A (en) | 2020-09-30 | 2020-09-30 | Power supply device and UPS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011061618.0A CN112234702A (en) | 2020-09-30 | 2020-09-30 | Power supply device and UPS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112234702A true CN112234702A (en) | 2021-01-15 |
Family
ID=74120157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011061618.0A Pending CN112234702A (en) | 2020-09-30 | 2020-09-30 | Power supply device and UPS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112234702A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422421A (en) * | 2021-05-27 | 2021-09-21 | 科华数据股份有限公司 | Battery device, power supply system and related control method |
| CN113422403A (en) * | 2021-05-27 | 2021-09-21 | 科华数据股份有限公司 | Battery device, power supply system and related control method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1081774A (en) * | 1975-06-27 | 1980-07-15 | George H. Studtmann | Bipolar inverter with induction generator |
| JPS5746631A (en) * | 1980-09-01 | 1982-03-17 | Tokyo Shibaura Electric Co | Current balance control system for power converter |
| KR20090110393A (en) * | 2008-04-18 | 2009-10-22 | 이병호 | Igbt plazma power supply |
| CN202076950U (en) * | 2011-01-11 | 2011-12-14 | 重庆汇华渝投节能科技有限公司 | Bipolar power supply inverter |
| CN106786694A (en) * | 2016-12-21 | 2017-05-31 | 太原理工大学 | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating |
| CN107147145A (en) * | 2017-06-09 | 2017-09-08 | 太原理工大学 | A kind of wind storage bipolarity direct-current grid and control method based on three level DC DC converters |
| CN109995244A (en) * | 2019-04-29 | 2019-07-09 | 西安交通大学 | A kind of commutator transformer topology for monopole to very bipolar transformation |
| CN110474366A (en) * | 2019-08-05 | 2019-11-19 | 深圳市金宏威技术有限责任公司 | A kind of control system for three-phase tri-level photovoltaic combining inverter |
-
2020
- 2020-09-30 CN CN202011061618.0A patent/CN112234702A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1081774A (en) * | 1975-06-27 | 1980-07-15 | George H. Studtmann | Bipolar inverter with induction generator |
| JPS5746631A (en) * | 1980-09-01 | 1982-03-17 | Tokyo Shibaura Electric Co | Current balance control system for power converter |
| KR20090110393A (en) * | 2008-04-18 | 2009-10-22 | 이병호 | Igbt plazma power supply |
| CN202076950U (en) * | 2011-01-11 | 2011-12-14 | 重庆汇华渝投节能科技有限公司 | Bipolar power supply inverter |
| CN106786694A (en) * | 2016-12-21 | 2017-05-31 | 太原理工大学 | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating |
| CN107147145A (en) * | 2017-06-09 | 2017-09-08 | 太原理工大学 | A kind of wind storage bipolarity direct-current grid and control method based on three level DC DC converters |
| CN109995244A (en) * | 2019-04-29 | 2019-07-09 | 西安交通大学 | A kind of commutator transformer topology for monopole to very bipolar transformation |
| CN110474366A (en) * | 2019-08-05 | 2019-11-19 | 深圳市金宏威技术有限责任公司 | A kind of control system for three-phase tri-level photovoltaic combining inverter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422421A (en) * | 2021-05-27 | 2021-09-21 | 科华数据股份有限公司 | Battery device, power supply system and related control method |
| CN113422403A (en) * | 2021-05-27 | 2021-09-21 | 科华数据股份有限公司 | Battery device, power supply system and related control method |
| CN113422421B (en) * | 2021-05-27 | 2023-09-29 | 科华数据股份有限公司 | Battery device, power supply system and related control method |
| CN113422403B (en) * | 2021-05-27 | 2023-10-27 | 科华数据股份有限公司 | Battery device, power supply system and related control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2946464B1 (en) | A multilevel converter with hybrid full-bridge cells | |
| US20210226534A1 (en) | Dc/dc converter and control method thereof | |
| EP2904678B1 (en) | High-efficiency electric conversion and continuity management system for uninterruptible power supplies (ups) and derived apparatuses | |
| WO2020248651A1 (en) | Off-line phase split device and inverter system | |
| US10873254B2 (en) | Electrical circuit for zero-voltage soft-switching in DC-DC converter under all load conditions | |
| US20230249564A1 (en) | Charging device and vehicle | |
| CN112234702A (en) | Power supply device and UPS | |
| CN111525583A (en) | Voltage regulating transformer and power flow control system | |
| CN110768551B (en) | AC-DC and DC-DC conversion multiplexing line and method | |
| CN203761253U (en) | Circuit branch of current transformer and three-phase current transformer | |
| US20230253877A1 (en) | Power factor correction and dc-dc multiplexing converter and uninterruptible power supply including the same | |
| CN114268234B (en) | Efficient low-harmonic hybrid modular multilevel converter and control method thereof | |
| US11349336B2 (en) | Method for operating power factor correction circuit and method for operating uninterruptible power supply apparatus | |
| CN115360903A (en) | DC power converter and DC power conversion system | |
| CN110118903B (en) | Equivalent full-power test circuit for direct-current port of power electronic transformer and control method | |
| CN211127568U (en) | DC-DC electric energy transmission system | |
| CN111327194B (en) | Power converter and power supply device sharing direct-current power supply | |
| CN113328454A (en) | Flexible multi-state switch, flexible alternating current-direct current interconnection system and control method | |
| WO2024065280A1 (en) | Multi-level conversion circuit, power converter, and electric power system | |
| TWI833359B (en) | Hybrid transformer apparatus and control method thereof | |
| CN204615402U (en) | A kind of electrode current transfer switch | |
| CN111478608B (en) | Circuit topology structure for automatically balancing direct-current side voltage and control method thereof | |
| TWI792605B (en) | Three-phase power factor correction device | |
| CN211830228U (en) | Capacitor split type static compensator circuit with zero sequence voltage-sharing bridge arm | |
| EP4239836A1 (en) | A charger, a multiplexing current conversion circuit and an uninterruptible power supply including the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210115 |
|
| RJ01 | Rejection of invention patent application after publication |