CN111293779A - Spare power automatic switching system without circulating current - Google Patents
Spare power automatic switching system without circulating current Download PDFInfo
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- CN111293779A CN111293779A CN202010134452.4A CN202010134452A CN111293779A CN 111293779 A CN111293779 A CN 111293779A CN 202010134452 A CN202010134452 A CN 202010134452A CN 111293779 A CN111293779 A CN 111293779A
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- circuit breaker
- control unit
- power supply
- breaker
- bidirectional converter
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a loop-free spare power automatic switching system, which comprises a circuit module and a control module for carrying out logic control on the circuit module; the circuit module comprises a first power circuit breaker, a second power circuit breaker, a first maintenance switch, a second maintenance switch, a thyristor, a first bidirectional converter, a second bidirectional converter, a first load circuit breaker and a second load circuit breaker which are connected in a specific sequence. The non-circulating current spare power automatic switching system provided by the invention collects the operation data of each component of the circuit module in real time, adjusts the working state of each component of the circuit module in real time, realizes the sensing, judgment and analysis of the whole power switching system and decision control, further realizes the seamless switching of two power supplies, ensures the consistency of voltage phases while meeting the switching speed, and avoids the generation of circulating current.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a loop-free spare power automatic switching system.
Background
In recent years, with the rapid development of advanced manufacturing industry, the requirement of high-end manufacturing industry on the quality of electric energy is increasingly increased, but in the actual working process, the power supply process of the power system is often affected by various fault types (such as short-circuit fault, switch trip, impact load and the like), so that voltage sag or interruption is caused, sensitive load working abnormity is caused, the whole power system cannot normally operate, and in severe cases, large economic loss or safety accident is caused, so that the improvement of the quality of the electric energy of power supply is a technical problem which needs to be solved urgently by the whole power system.
The existing power supply mode of the power system usually adopts a double-loop power supply mode and is provided with a spare power automatic switching device, but in the prior art, the switching time of a mechanical switch is too long, the response is too slow, the requirement of sensitive loads of the power system cannot be met, power supplies with different phases are connected in parallel to form a circulating current, so that the power system cannot normally operate, and more importantly, the circulating current-free spare power automatic switching system in the prior art cannot ensure the continuity of the phases of the loads.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a spare power automatic switching system without a circulating current, which can ensure consistent voltage phases and can perform fast switching.
In order to achieve the above object, the present invention provides a loop-free spare power automatic switching system, which includes a circuit module and a control module for performing logic control on the circuit module;
the circuit module comprises a first power supply circuit breaker, a second power supply circuit breaker, a first maintenance switch, a second maintenance switch, a thyristor, a first bidirectional converter, a second bidirectional converter, a first load circuit breaker and a second load circuit breaker;
one end of the first power supply breaker is connected with an external main power supply, and the other end of the first power supply breaker is connected with one end of the second power supply breaker through the first maintenance switch, the thyristor, the first bidirectional converter, the second bidirectional converter and the second maintenance switch which are sequentially connected in series;
the other end of the first power supply circuit breaker is also connected with one end of the second power supply circuit breaker through the first load circuit breaker and the second load circuit breaker which are sequentially connected in series; a connection node between the first load circuit breaker and the second load circuit breaker is connected with an external load;
and the other end of the second power supply breaker is connected with an external standby power supply.
As an improvement of the above scheme, the control module comprises a voltage monitoring unit, a power selection unit, a line breaker control unit, a thyristor control unit, a bidirectional converter control unit, a load breaker control unit and a phase tracking unit;
the voltage monitoring unit is used for acquiring voltage information of the circuit module;
the power supply selection unit is used for switching the power supply direction according to the voltage information;
the phase tracking unit is used for ensuring that the phase of the output voltage of the circuit module does not jump in the switching action process;
the bidirectional converter control unit is used for controlling the working operation states of the first bidirectional converter and the second bidirectional converter, and the working operation states comprise rectification and inversion.
As an improvement of the above scheme, the circuit breaker control unit is connected with the thyristor control unit and used for communication data interaction.
As an improvement of the above scheme, the bidirectional converter control unit is composed of full control devices, control logics of the first bidirectional controller and the second bidirectional controller are locked, and the first bidirectional controller and the second bidirectional controller operate in a working operation state of alternating coordination of rectification and inversion.
As an improvement of the above scheme, the thyristor control unit is connected with the load circuit breaker control unit and is used for communication data interaction.
As an improvement of the above scheme, the line breaker control unit, the thyristor control unit, the bidirectional converter control unit and the load breaker control unit satisfy a logical latching relationship;
the logical latching relationship includes: when the thyristor is in a closed state, the circuit breaker control unit cuts off a fault circuit, and the first bidirectional converter and the second bidirectional converter are in corresponding working operation states, the load circuit breaker control unit correspondingly acts to send a switching instruction.
As an improvement of the above scheme, the first power circuit breaker and the second power circuit breaker are both vacuum circuit breakers.
As an improvement of the above solution, the first load break and the second load break are both vacuum breaks.
As an improvement of the above scheme, the first maintenance switch and the second maintenance switch are both mechanical switches with a forced disconnection function.
The loop-free spare power automatic switching system provided by the invention has the advantages that by arranging the circuit module and the control module for accurately controlling the circuit module, and arranging the first power circuit breaker, the second power circuit breaker, the first maintenance switch, the second maintenance switch, the thyristor, the first bidirectional converter, the second bidirectional converter, the first load circuit breaker and the second load circuit breaker which are specifically connected in the circuit module, the whole system is based on the effective matching use of all components of the circuit module, accurate logic control is applied, the operation data of all components of the circuit module is collected in real time, the working states of all components of the circuit module are adjusted in real time, the perception, analysis and judgment of system information and decision control are realized, the seamless switching of two power supplies is further realized, the switching speed of the working modes of the circuit is improved, and while the switching speed is met, the voltage phase is ensured to be consistent, and the generation of circulation current can be avoided.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments 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 that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a spare power automatic switching system without a loop current according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control module of a spare power automatic switching system without a circulating current according to an embodiment of the present invention.
Reference is made to the accompanying drawings in which:
1. a main power supply; 2. a first power supply breaker; 3. a first service switch; 4. a thyristor; 5. a first bidirectional converter; 6. a second bidirectional converter; 7. a second service switch; 8. a second power supply breaker; 9. a standby power supply; 10. a first load circuit breaker; 11. a second load breaker.
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.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms first, second and the like in the description and in the claims, are used for descriptive purposes only to distinguish the same technical features, and are not to be construed as indicating or implying a relative importance or implicit indication of the number of technical features indicated, nor is an order or temporal order necessarily described. The terms are interchangeable where appropriate. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include at least one of the feature.
An embodiment of the present invention provides a loop-free spare power automatic switching system, and specifically, please refer to fig. 1, which provides a schematic structural diagram of a loop-free spare power automatic switching system according to an embodiment of the present invention, where the loop-free spare power automatic switching system includes a circuit module and a control module for performing logic control on the circuit module, and control signals are uniformly sent by the control module, so as to ensure an action logic sequence of each component of the circuit module, and prevent a circuit action from being mistaken.
The circuit module comprises a first power circuit breaker 2, a second power circuit breaker 8, a first maintenance switch 3, a second maintenance switch 7, a thyristor 4, a first bidirectional converter 5, a second bidirectional converter 6, a first load circuit breaker 10 and a second load circuit breaker 11.
One end of the first power circuit breaker 2 is connected with an external main power supply 1, and the other end of the first power circuit breaker 2 is connected with one end of the second power circuit breaker 8 through the first maintenance switch 3, the thyristor 4, the first bidirectional converter 5, the second bidirectional converter 6 and the second maintenance switch 7 which are sequentially connected in series.
The other end of the first power supply breaker 2 is also connected with one end of the second power supply breaker 8 through the first load breaker 10 and the second load breaker 11 which are sequentially connected in series; a connection node between the first load break 10 and the second load break 11 is connected to an external load 12.
The other end of the second power breaker 8 is connected to an external backup power supply 9.
The non-loop spare power automatic switching system provided by the embodiment utilizes two groups of converters to carry out rectification and inversion according to the principle of back-to-back interconnection of different phase power grids to realize rapid switching of a spare power supply, and a first power circuit breaker, a second power circuit breaker, a first maintenance switch, a second maintenance switch, a thyristor, a first bidirectional converter, a second bidirectional converter, a first load circuit breaker and a second load circuit breaker which are specifically connected are arranged in a circuit module, so that the circuit connection is more reasonable and accurate, and meanwhile, specific voltage phase information can be obtained according to different components and can be sent to a control module in time to be processed, so that the whole circuit module can rapidly respond and correspondingly adjust, the perception, the obtaining, the analysis and the judgment of system information are realized, and the seamless switching of two paths of power supplies is further realized, the switching speed of the circuit working mode is improved, the switching speed is met, the voltage phases are ensured to be consistent, and the generation of circulation current can be avoided.
Preferably, in the above embodiment, please refer to fig. 2, which is a schematic structural diagram of a control module of a circulating-current-free spare power automatic switching system according to an embodiment of the present invention, wherein the control module includes a voltage monitoring unit, a power selecting unit, a circuit breaker control unit, a thyristor control unit, a bidirectional converter control unit, a load breaker control unit, and a phase tracking unit.
The voltage monitoring unit is used for acquiring voltage information from the main power supply side, the standby power supply side and the load side respectively, analyzing the amplitude of the voltage, judging the voltage sag or interruption condition within 2ms accurately through a real-time voltage monitoring algorithm, and sending the voltage sag or interruption condition to other units of the control module.
The power supply selection unit is used for recording the state information of each breaker and each thyristor, determining the power supply of the load according to the monitoring information of the voltage monitoring unit, and judging the switching direction when the power supply needs to be switched, so that the power supply selection unit is used as the action basis of the breaker control unit, the thyristor control unit and the bidirectional converter control unit.
The phase tracking unit is used for tracking the phase information of the voltage at the main power supply side, the standby power supply side and the load side in real time, is responsible for tracking the phase of the voltage at the load side in the power supply switching process, and provides the phase information of the output voltage through digital phase locking so as to ensure that the phase of the output voltage does not jump in the switching process.
The bidirectional converter control unit is used for controlling the working operation states of the first bidirectional converter and the second bidirectional converter, wherein the first bidirectional converter and the second bidirectional converter adopt a fully-controlled rectifier bridge and can be controlled to work as a rectifier or an inverter, the two bidirectional converter modules are controlled by one set of system, namely, the bidirectional converter control unit is used for controlling, and logic instructions are used for ensuring that the two converters can only work simultaneously and one converter is required to be the rectifier and the other converter is required to be the inverter so as to control the flowing direction of current.
It should be noted that the working principle of the whole loop-free backup power automatic switching system is that when two power supplies are both supplying power normally, the load is supplied by the main power supply, at this time, the first power supply circuit breaker and the second power supply circuit breaker are both closed, the first load circuit breaker is closed, the second load circuit breaker is opened, the first maintenance switch and the second maintenance switch are both closed, the thyristor is opened, the first bidirectional converter and the second bidirectional converter are both locked, and the whole control module monitors the amplitude and the phase of the two power supplies and the load voltage of the circuit module in real time.
When the main power supply side has faults to cause voltage sag or fluctuation, a voltage monitoring unit of the control module monitors the voltage sag of the main power supply side, the monitoring time is within 2ms, a phase tracking unit locks and tracks the load phase, and sending to the bidirectional converter control unit, the bidirectional converter control unit controls the first bidirectional converter to work in an inversion mode, the inversion output phase is the same as the load phase, the second bidirectional converter works in a rectification mode, the thyristor controls the voltage to control the conduction of the thyristor, the whole process time is within 3ms, and when the voltage drop is monitored, the power supply selection unit trips the first power supply circuit breaker, the standby power supply supplies power to the load through the second bidirectional converter serving as the rectifier, the first bidirectional converter serving as the inverter, the thyristor and the first load circuit breaker, and the voltage amplitude fluctuation time on the load in the switching process is within 5 ms. The first bidirectional converter as an inverter and the second bidirectional converter as a rectifier determine that current flows from the standby power supply to the load, and no circulating current is generated in the switching process.
When the first power supply circuit breaker is tripped, the phase tracking unit gradually and smoothly adjusts the output phase of the inverter side, so that the load phase is consistent with the phase of the standby power supply, then the load circuit breaker control unit controls the second load circuit breaker to be closed, then the thyristor is switched off, the first bidirectional converter and the second bidirectional converter are locked, the first load circuit breaker is switched off, and at the moment, the load is completely transferred to be directly supplied with power through the standby power supply.
When the main power supply is recovered to be normal, the first power supply circuit breaker is closed, the thyristor is conducted, the first bidirectional converter works in a rectification mode, the second bidirectional converter works in an inversion mode, the output phase of the second bidirectional converter is the same as the phase of the load voltage and the phase of the standby power supply, then the second power supply circuit breaker is tripped, the output phase of the second bidirectional converter is adjusted to be the same as the phase of the main power supply, then the first load circuit breaker is closed, the thyristor is disconnected, the first bidirectional converter and the second bidirectional converter are locked, the second load circuit breaker is disconnected, the second power supply circuit breaker is closed, and at this time, the load is completely transferred to be directly supplied with power through the main power supply.
Preferably, in the above embodiment, the circuit breaker control unit is connected to the thyristor control unit, and is configured to perform communication data interaction.
Preferably, in the above embodiment, the bidirectional converter control unit is composed of full-control devices, the control logics of the first bidirectional controller and the second bidirectional controller are locked, and the first bidirectional controller and the second bidirectional controller operate in an operation state in which rectification and inversion are alternately matched.
Preferably, in the above embodiment, the thyristor control unit is connected to the load circuit breaker control unit, and is configured to perform communication data interaction.
Preferably, in the above embodiment, the line breaker control unit, the thyristor control unit, the bidirectional converter control unit, and the load breaker control unit satisfy a logical latching relationship;
the logical latching relationship includes: when the thyristor is in a closed state, the circuit breaker control unit cuts off a fault circuit, and the first bidirectional converter and the second bidirectional converter are in corresponding working operation states, the load circuit breaker control unit correspondingly acts to send a switching instruction.
Preferably, in the above embodiment, the first power supply breaker and the second power supply breaker are both vacuum breakers.
Preferably, in the above embodiment, the first load break and the second load break are both vacuum breaks.
Preferably, in the above embodiment, the first service switch and the second service switch are both mechanical switches with a forced disconnection function.
The loop-free spare power automatic switching system provided by the invention has the advantages that by arranging the circuit module and the control module for accurately controlling the circuit module, and arranging the first power circuit breaker, the second power circuit breaker, the first maintenance switch, the second maintenance switch, the thyristor, the first bidirectional converter, the second bidirectional converter, the first load circuit breaker and the second load circuit breaker which are specifically connected in the circuit module, the whole system is based on the effective matching use of all components of the circuit module, accurate logic control is applied, the operation data of all components of the circuit module is collected in real time, the working states of all components of the circuit module are adjusted in real time, the perception, analysis and judgment of system information and decision control are realized, the seamless switching of two power supplies is further realized, the switching speed of the working modes of the circuit is improved, and while the switching speed is met, the voltage phase is ensured to be consistent, and the generation of circulation current can be avoided.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Claims (9)
1. A non-circulating current spare power automatic switching system is characterized by comprising a circuit module and a control module for carrying out logic control on the circuit module;
the circuit module comprises a first power supply circuit breaker, a second power supply circuit breaker, a first maintenance switch, a second maintenance switch, a thyristor, a first bidirectional converter, a second bidirectional converter, a first load circuit breaker and a second load circuit breaker;
one end of the first power supply breaker is connected with an external main power supply, and the other end of the first power supply breaker is connected with one end of the second power supply breaker through the first maintenance switch, the thyristor, the first bidirectional converter, the second bidirectional converter and the second maintenance switch which are sequentially connected in series;
the other end of the first power supply circuit breaker is also connected with one end of the second power supply circuit breaker through the first load circuit breaker and the second load circuit breaker which are sequentially connected in series; a connection node between the first load circuit breaker and the second load circuit breaker is connected with an external load;
and the other end of the second power supply breaker is connected with an external standby power supply.
2. The circulating-current-free spare power automatic switching system according to claim 1, wherein the control module comprises a voltage monitoring unit, a power selection unit, a circuit breaker control unit, a thyristor control unit, a bidirectional converter control unit, a load breaker control unit and a phase tracking unit;
the voltage monitoring unit is used for acquiring voltage information of the circuit module;
the power supply selection unit is used for switching the power supply direction according to the voltage information;
the phase tracking unit is used for ensuring that the phase of the output voltage of the circuit module does not jump in the switching action process;
the bidirectional converter control unit is used for controlling the working operation states of the first bidirectional converter and the second bidirectional converter, and the working operation states comprise rectification and inversion.
3. The circulating-current-free spare power automatic switching system as claimed in claim 2, wherein the circuit breaker control unit is connected with the thyristor control unit and used for communication data interaction.
4. The circulating-current-free spare power automatic switching system according to claim 2, wherein the bidirectional converter control unit is composed of a full-control device; the control logics of the first bidirectional controller and the second bidirectional controller are locked, and the first bidirectional controller and the second bidirectional controller operate in a working operation state of alternating coordination of rectification and inversion.
5. The circulating-current-free spare power automatic switching system as claimed in claim 2, wherein the thyristor control unit is connected with the load circuit breaker control unit and used for communication data interaction.
6. The circulating-current-free spare power automatic switching system according to claim 2, wherein the line breaker control unit, the thyristor control unit, the bidirectional converter control unit and the load breaker control unit satisfy a logical latching relationship;
the logical latching relationship includes: when the thyristor is in a closed state, the circuit breaker control unit cuts off a fault circuit, and the first bidirectional converter and the second bidirectional converter are in corresponding working operation states, the load circuit breaker control unit correspondingly acts to send a switching instruction.
7. The circulating-current-free spare power automatic switching system according to claim 1, wherein the first power breaker and the second power breaker are both vacuum breakers.
8. The circulating-current-free spare power automatic switching system according to claim 1, wherein the first load circuit breaker and the second load circuit breaker are both vacuum circuit breakers.
9. The circulating-current-free spare power automatic switching system according to claim 1, wherein the first service switch and the second service switch are mechanical switches with a forced disconnection function.
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| CN202010134452.4A CN111293779A (en) | 2020-02-28 | 2020-02-28 | Spare power automatic switching system without circulating current |
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| CN202010134452.4A CN111293779A (en) | 2020-02-28 | 2020-02-28 | Spare power automatic switching system without circulating current |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786389A (en) * | 2020-08-04 | 2020-10-16 | 南京能联电气科技有限公司 | Dual-power switching device applied to DTU/FTU |
| CN111835000A (en) * | 2020-06-19 | 2020-10-27 | 国网湖北省电力有限公司武汉供电公司 | Transformer substation load transfer method and device based on full-control type AC/DC/AC converter |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944764A (en) * | 2009-07-07 | 2011-01-12 | 天津市电力公司 | Thyristor forced commutation-based double-loop power supply switching device |
| US20110148205A1 (en) * | 2009-12-17 | 2011-06-23 | Samsung Sdi Co., Ltd. | Power storage system and method of controlling the same |
| CN102882268A (en) * | 2012-08-27 | 2013-01-16 | 青岛经济技术开发区创统科技发展有限公司 | Undisturbed uninterruptible power supply device |
| CN104393672A (en) * | 2014-12-08 | 2015-03-04 | 广东电网有限责任公司东莞供电局 | Residual voltage estimate based seamless switching power supply method for motor |
| CN106130167A (en) * | 2016-07-11 | 2016-11-16 | 合肥联信电源有限公司 | A kind of out of phase dual power supply apparatus for fast switching |
| CN205986313U (en) * | 2016-08-18 | 2017-02-22 | 厦门盈盛捷电力科技有限公司 | DC AC invertion power supply system |
| CN107112796A (en) * | 2014-12-10 | 2017-08-29 | 伊顿公司 | Modular UPS equipment and its operating method |
| CN108933475A (en) * | 2018-08-02 | 2018-12-04 | 四川航电微能源有限公司 | A kind of double-bus power supply seamless switching device and its control method |
-
2020
- 2020-02-28 CN CN202010134452.4A patent/CN111293779A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944764A (en) * | 2009-07-07 | 2011-01-12 | 天津市电力公司 | Thyristor forced commutation-based double-loop power supply switching device |
| US20110148205A1 (en) * | 2009-12-17 | 2011-06-23 | Samsung Sdi Co., Ltd. | Power storage system and method of controlling the same |
| CN102882268A (en) * | 2012-08-27 | 2013-01-16 | 青岛经济技术开发区创统科技发展有限公司 | Undisturbed uninterruptible power supply device |
| CN104393672A (en) * | 2014-12-08 | 2015-03-04 | 广东电网有限责任公司东莞供电局 | Residual voltage estimate based seamless switching power supply method for motor |
| CN107112796A (en) * | 2014-12-10 | 2017-08-29 | 伊顿公司 | Modular UPS equipment and its operating method |
| CN106130167A (en) * | 2016-07-11 | 2016-11-16 | 合肥联信电源有限公司 | A kind of out of phase dual power supply apparatus for fast switching |
| CN205986313U (en) * | 2016-08-18 | 2017-02-22 | 厦门盈盛捷电力科技有限公司 | DC AC invertion power supply system |
| CN108933475A (en) * | 2018-08-02 | 2018-12-04 | 四川航电微能源有限公司 | A kind of double-bus power supply seamless switching device and its control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835000A (en) * | 2020-06-19 | 2020-10-27 | 国网湖北省电力有限公司武汉供电公司 | Transformer substation load transfer method and device based on full-control type AC/DC/AC converter |
| CN111835000B (en) * | 2020-06-19 | 2022-03-29 | 国网湖北省电力有限公司武汉供电公司 | Transformer substation load transfer method and device based on full-control type AC/DC/AC converter |
| CN111786389A (en) * | 2020-08-04 | 2020-10-16 | 南京能联电气科技有限公司 | Dual-power switching device applied to DTU/FTU |
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