CN111490588B - Method for realizing mutual backup of communication power supply and operation power supply of transformer substation - Google Patents
Method for realizing mutual backup of communication power supply and operation power supply of transformer substation Download PDFInfo
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- CN111490588B CN111490588B CN202010257123.9A CN202010257123A CN111490588B CN 111490588 B CN111490588 B CN 111490588B CN 202010257123 A CN202010257123 A CN 202010257123A CN 111490588 B CN111490588 B CN 111490588B
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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
- H02J9/061—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 DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
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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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- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The implementation method for mutual backup of the transformer substation communication power supply and the operation power supply comprises the steps of determining input and output voltage or power in the transformer substation communication power supply and the operation power supply, and determining the turns ratio of a primary coil to a secondary coil in a high-frequency transformer connected between the communication power supply and the operation power supply according to the determined input and output voltage or power; determining the working mode of the high-frequency transformer according to the current power supply backup requirement; and the input end of the high-frequency transformer is respectively connected with an operating power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of the primary coil and the secondary coil in the high-frequency transformer is adjusted. The corresponding voltage-boosting and voltage-boosting operation is realized by adjusting the turn ratio of the coil in the high-frequency transformer, and the method is applicable to mutual backup of direct-current power supplies with any voltage grade and power grade. The communication power supply and the operation power supply of the transformer substation have higher safety and power supply reliability.
Description
Technical Field
The application belongs to the field of power supply management, and particularly relates to a method for realizing mutual backup of a communication power supply and an operation power supply of a transformer substation.
Background
The direct current power supply of the transformer substation can provide stable direct current supply for various devices and plays a very important role. At present, a group of storage batteries is arranged on an operation power supply and a communication power supply of many substations, and the substation in the arrangement mode has a plurality of defects, such as the risk of failure of a direct current power supply of the substation when alternating current power fails and the storage batteries are failed, and serious accidents are easily caused, so that huge economic losses are caused. In addition, when the storage battery is checked in the capacity discharging operation process, a backup power supply is required to be additionally carried, short-time parallel switching is carried out, the operation difficulty and complexity are increased, human operation errors are easy to occur, and great personnel and property expenses are brought to the maintenance work of the storage battery.
At present, the backup of the direct current system mostly adopts a mode that two or more groups of storage battery packs are connected in parallel on the same section of direct current bus or two sets of direct current systems are mutually backup power sources through switch control, and the two modes of backup have the defects and potential certain risks. The defects are solved by a plurality of electric power researchers through connecting the input and output ends of the storage battery with the control device or directly connecting the two sets of direct current systems with the flexible bridging device, and when abnormality occurs or maintenance is needed, the safety and the power supply reliability of the direct current systems can be improved. However, the control device is connected with a plurality of groups of storage batteries in parallel on the direct current bus, so that the maintenance cost and the investment cost of the transformer substation can be greatly increased to a certain extent; the flexible bridging mode is adopted between the two sets of direct current systems, so that the requirements on the voltage grade and the power grade of the two sets of direct current systems are high, and the method is not suitable for backup between the two sets of direct current systems with different specifications.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the application provides a method for realizing mutual backup of a communication power supply and an operation power supply of a transformer substation, and the method has no specification requirement on direct current systems at two sides, so that the communication power supply and the operation power supply of the transformer substation have higher safety and power supply reliability; and the backup power supply can supply power for the abnormal direct-current power supply load in a seamless and uninterrupted way, so that the risk of failure of the direct-current power supply of the transformer substation is effectively reduced.
Specifically, the implementation method for mutual backup of the substation communication power supply and the operation power supply provided by the embodiment of the application includes:
determining input and output voltage or power in a transformer station communication power supply and an operation power supply, and determining the turn ratio of a primary coil and a secondary coil in a high-frequency transformer connected between the communication power supply and the operation power supply according to the determined input and output voltage or power;
determining the working mode of the high-frequency transformer according to the current power supply backup requirement;
and the input end of the high-frequency transformer is respectively connected with an operating power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of the primary coil and the secondary coil in the high-frequency transformer is adjusted.
Optionally, determining the working mode of the high-frequency transformer according to the current power supply backup requirement; comprising the following steps:
when the operation power supply backs up the communication power supply, adopting a high-frequency transformer step-down mode; or (b)
When the communication power supply backs up the operation power supply, a high-frequency transformer boosting mode is adopted.
Optionally, when the operating power source backs up the communication power source, a high-frequency transformer step-down mode is adopted, including:
the operation power supply is connected with the input end of the high-frequency transformer, and the communication power supply is connected with the output end of the high-frequency transformer;
when detecting that the communication power supply is abnormal in operation, the PWM isolation driving module is quickly started, and the MOS module C and the MOS module D are controlled to be in a switching state;
the energy output by the operation power supply is reduced by the high-frequency transformer and rectified, and then is output to the communication power supply output line in a seamless and uninterrupted way to be used as standby power supply of the communication power supply.
Optionally, when the communication power source backs up the operation power source, a high-frequency transformer boosting mode is adopted, including:
the communication power supply is connected to the input end of the high-frequency transformer, and the operation power supply is connected to the output end of the high-frequency transformer;
when abnormal operation of the operation power supply is detected, the PWM isolation driving module is started rapidly, and the MOS module C and the MOS module D are controlled to be in a switching state;
the energy output by the communication power supply is boosted by the high-frequency transformer and rectified, and then is output to the output line of the operation power supply in a seamless and uninterrupted way to be used as standby power supply of the operation power supply.
Optionally, the substation communication power supply and operation power supply guard backup device adopts a unidirectional DC/DC conversion or a bidirectional DC/DC conversion mode to realize the function that the operation power supply and the communication power supply are mutually backed up.
Optionally, the implementation method further includes:
the communication power supply and the operation power supply are mutually and physically isolated.
The beneficial effects that this application provided technical scheme brought are:
the corresponding voltage-boosting and voltage-boosting operation is realized by adjusting the turn ratio of the coil in the high-frequency transformer, and the method is applicable to mutual backup of direct-current power supplies with any voltage grade and power grade. Meanwhile, the backup power supply can supply power for the abnormal direct-current power supply load in a seamless and uninterrupted manner, and the risk of failure of the direct-current power supply of the transformer substation is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method proposed in the present application;
FIG. 2 is a schematic block diagram of an implementation of the present application;
FIG. 3 is a circuit block diagram of an operating power supply backed up for a communication power supply;
fig. 4 is a circuit configuration diagram of a communication power supply for backup of an operation power supply.
Detailed Description
To further clarify the structure and advantages of the present application, a further description of the structure will be provided with reference to the drawings.
Example 1
The implementation method for mutual backup of the substation communication power supply and the operation power supply provided by the embodiment of the application, as shown in fig. 1, includes:
11. determining input and output voltage or power in a transformer station communication power supply and an operation power supply, and determining the turn ratio of a primary coil and a secondary coil in a high-frequency transformer connected between the communication power supply and the operation power supply according to the determined input and output voltage or power;
12. determining the working mode of the high-frequency transformer according to the current power supply backup requirement;
13. and the input end of the high-frequency transformer is respectively connected with an operating power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of the primary coil and the secondary coil in the high-frequency transformer is adjusted.
In implementation, in the implementation method of the mutual backup device of the substation communication power supply and the operation power supply, as shown in fig. 2, the related elements include a CPU module a, a high-frequency transformer B, MOS module C, MOS module D, PWM isolation driving module E, a diode F, a current sensor G and a voltage acquisition module H.
The MOS module C and the MOS module D are respectively connected with a primary coil outgoing line of the high-frequency transformer B; the diode F and the current sensor G are sequentially connected to an output line of the high-frequency transformer B, the voltage acquisition module H is connected to the output line in parallel, and the current sensor G and the voltage acquisition module H are used for acquiring current and voltage real-time conditions of a direct-current power supply; the CPU module A is respectively connected with the current sensor G and the voltage acquisition module H, and is used for receiving, processing and acquiring data, judging the running condition of the direct current power supply and sending a control instruction; one end of the PWM isolation driving module E is connected with the CPU module A, and the other end of the PWM isolation driving module E is connected with the grid electrode of the MOS module and is used for receiving an instruction sent by the CPU module, sending driving to the MOS module and controlling the MOS module to be turned on and off. A realization method of a transformer substation communication power supply and operation power supply guard backup device comprises the following steps:
(1) A transformer station communication power supply and an operation power supply are connected between a first direct current power supply and a second direct current power supply as backup devices, and a high-frequency transformer with a proper turn ratio is selected according to the voltage and the power grade of the first direct current power supply and the second direct current power supply.
(2) When the operation power supply backs up the communication power supply, as shown in fig. 3, the high-frequency transformer B adopts a step-down mode, the operation power supply is connected with the input end of the device, and the communication power supply is connected with the output end of the device; the current sensor G and the voltage acquisition module H respectively acquire current and voltage changes on an output line of the communication power supply, and transmit the current and voltage changes to the CPU module A at specific time intervals for data analysis and processing. When the output of the communication power supply is abnormal, the voltage and current values of the communication power supply change, the CPU module A immediately judges the abnormal condition and sends an instruction for starting the backup power supply to the PWM isolation driving module E, the PWM isolation driving module E intelligently adjusts the duty ratio of the PWM1 and the PWM2, the MOS module C and the MOS module D are controlled to be in a switching state, the energy output by the operation power supply is converted into alternating current after being oscillated by the MOS module, and the alternating current is reduced and rectified by the high-frequency transformer B to provide direct current for the load of the communication power supply in a seamless and uninterrupted manner to serve as the backup power supply of the communication power supply.
(3) When the communication power source backs up the operation power source, as shown in fig. 4, the high-frequency transformer B adopts a boost mode, the communication power source is connected to the input end of the device, and the operation power source is connected to the output end of the device; the current sensor G and the voltage acquisition module H respectively acquire current and voltage changes on an operation power output line and transmit the current and voltage changes to the CPU module A at specific time intervals for data analysis and processing. When the output of the operation power supply is abnormal, the voltage and current values of the operation power supply change, the CPU module A immediately judges the abnormal condition and sends an instruction for starting the backup power supply to the PWM isolation driving module E, the PWM isolation driving module E intelligently adjusts the duty ratio of the PWM1 and the PWM2, the MOS module C and the MOS module D are controlled to be in a switching state, the energy output by the communication power supply is converted into alternating current after being oscillated by the MOS module, and the alternating current is boosted and rectified by the high-frequency transformer B and then is continuously output in a seamless mode to provide direct current for the load of the operation power supply to serve as a backup power supply of the operation power supply.
Optionally, the substation communication power supply and operation power supply guard backup device adopts a unidirectional DC/DC conversion or a bidirectional DC/DC conversion mode to realize the function that the operation power supply and the communication power supply are mutually backed up. The communication power supply and the operation power supply are mutually and physically isolated.
The implementation method for the mutual backup device of the substation communication power supply and the operation power supply is wide in application scene range, and can be suitable for mutual backup of direct-current power supplies with any voltage class and power class. The operation power supply can transmit energy through a step-down mode to serve as a backup power supply of the communication power supply, and the communication power supply can transmit energy through a step-up mode to serve as the backup power supply of the operation power supply, so that the communication power supply and the operation power supply of the transformer substation have higher safety and power supply reliability. By the application of the transformer substation direct-current power supply load power supply system, the abnormal direct-current power supply and the backup power supply can be mutually and physically isolated without influencing each other, and the backup power supply can supply power for the abnormal direct-current power supply load in a seamless and uninterrupted manner, so that the risk of failure of the transformer substation direct-current power supply is effectively reduced. By adopting the method and the device, the nuclear capacity discharging process of the substation storage battery can be simplified, a backup power supply is not required to be additionally carried, complicated short-time parallel switching is avoided, and great expenditure of people, financial resources and things is saved for the maintenance work of the storage battery.
The various numbers in the above embodiments are for illustration only and do not represent the order of assembly or use of the various components.
The foregoing description of the embodiments is provided for the purpose of illustration only and is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and scope of the invention.
Claims (3)
1. The implementation method for mutual backup of the communication power supply and the operation power supply of the transformer substation is characterized by comprising the following steps:
determining input and output voltage or power in a transformer station communication power supply and an operation power supply, and determining the turn ratio of a primary coil and a secondary coil in a high-frequency transformer connected between the communication power supply and the operation power supply according to the determined input and output voltage or power;
determining the working mode of the high-frequency transformer according to the current power supply backup requirement;
the input end of the high-frequency transformer is respectively connected with an operating power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of the primary coil and the secondary coil in the high-frequency transformer is adjusted;
determining the working mode of the high-frequency transformer according to the current power supply backup requirement; comprising the following steps:
when the operation power supply backs up the communication power supply, adopting a high-frequency transformer step-down mode; or (b)
When the communication power supply backs up the operation power supply, a high-frequency transformer boosting mode is adopted;
when the operating power supply backs up the communication power supply, a high-frequency transformer step-down mode is adopted, and the method comprises the following steps:
the operation power supply is connected with the input end of the high-frequency transformer, and the communication power supply is connected with the output end of the high-frequency transformer;
when detecting that the communication power supply is abnormal in operation, the PWM isolation driving module is quickly started, and the MOS module C and the MOS module D are controlled to be in a switching state;
the energy output by the operation power supply is reduced by the high-frequency transformer and rectified, and then is output to the communication power supply output line in a seamless and uninterrupted way to be used as standby power supply of the communication power supply;
when the communication power supply backs up the operation power supply, a high-frequency transformer boosting mode is adopted, and the method comprises the following steps:
the communication power supply is connected to the input end of the high-frequency transformer, and the operation power supply is connected to the output end of the high-frequency transformer;
when abnormal operation of the operation power supply is detected, the PWM isolation driving module is started rapidly, and the MOS module C and the MOS module D are controlled to be in a switching state;
the energy output by the communication power supply is boosted by the high-frequency transformer and rectified, and then is output to the output line of the operation power supply in a seamless and uninterrupted way to be used as standby power supply of the operation power supply.
2. The method for implementing mutual backup of the communication power supply and the operation power supply of the transformer substation according to claim 1, wherein the transformer substation communication power supply and the operation power supply guard backup device implement the function of mutual backup of the operation power supply and the communication power supply by adopting a unidirectional DC/DC conversion or a bidirectional DC/DC conversion mode.
3. The method for implementing mutual backup between a communication power supply and an operation power supply of a transformer substation according to claim 1, wherein the implementing method further comprises:
the communication power supply and the operation power supply are mutually and physically isolated.
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202374182U (en) * | 2011-11-25 | 2012-08-08 | 比亚迪股份有限公司 | DC/DC (Direct Current/Direct Current) bidirectional converter |
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CN101521391B (en) * | 2008-02-28 | 2012-10-10 | 德观电子(上海)有限公司 | Off-line uninterrupted power supply device |
CN201758364U (en) * | 2010-05-10 | 2011-03-09 | 东莞市创锐电子技术有限公司 | AC/multi-path DC power supply for multi-path output in low cross adjustment rate |
CN102480169B (en) * | 2010-11-30 | 2014-06-25 | 西门子公司 | Method and system for quickly switching standby power supplies of multi-channel power supplies |
CN203504285U (en) * | 2013-10-28 | 2014-03-26 | 李小涛 | UPS integrated power supply |
CN205792250U (en) * | 2016-04-21 | 2016-12-07 | 上海麟荣电子技术有限公司 | Dual input Switching Power Supply |
CN105790429A (en) * | 2016-04-28 | 2016-07-20 | 上海电机学院 | Low-power uninterrupted power source based on bidirectional DC-DC converter and control method thereof |
CN107332341A (en) * | 2017-07-27 | 2017-11-07 | 深圳市泰昂能源科技股份有限公司 | Direct current ups power device and system |
CN110061560B (en) * | 2019-05-24 | 2022-02-08 | 联正电子(深圳)有限公司 | Off-line uninterrupted power supply and control method thereof |
CN110816274A (en) * | 2019-11-15 | 2020-02-21 | 珠海格力电器股份有限公司 | Power supply control device, automobile and power supply control method of automobile |
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---|---|---|---|---|
CN202374182U (en) * | 2011-11-25 | 2012-08-08 | 比亚迪股份有限公司 | DC/DC (Direct Current/Direct Current) bidirectional converter |
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