CN111490588A - 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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- CN111490588A CN111490588A CN202010257123.9A CN202010257123A CN111490588A CN 111490588 A CN111490588 A CN 111490588A CN 202010257123 A CN202010257123 A CN 202010257123A CN 111490588 A CN111490588 A CN 111490588A
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The method for realizing mutual backup of the transformer substation communication power supply and the operating power supply comprises the steps of determining input and output voltages or powers in the transformer substation communication power supply and the operating 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 operating power supply according to the determined input and output voltages or powers; 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 operation power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of a primary coil and a secondary coil in the high-frequency transformer is adjusted. The corresponding voltage boosting and reducing operation is realized by adjusting the turn ratio of the coils in the high-frequency transformer, and the method can be suitable for direct-current power supplies of any voltage class and power class to back up each other. 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 transformer substation communication power supply and an operating power supply.
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 are arranged on operation power supplies and communication power supplies of a plurality of substations, and the substations adopting the arrangement mode have a plurality of defects, for example, when alternating current power failure occurs and the storage batteries are in failure, the risk of failure of a direct current power supply of the substation exists, so that serious accidents are easily caused, and huge economic loss is caused. In addition, when the storage battery is subjected to the capacity checking discharge operation process, a backup power supply is often required to be additionally carried, short-time parallel switching is performed, the operation difficulty and complexity are increased, manual operation errors are easy to occur, and great personnel and property expenses can be brought to the storage battery maintenance work.
At present, two or more groups of storage battery packs are connected in parallel on the same section of direct current bus, or two direct current systems are mutually used as backup power supplies through switch control, and the backup realized by the two modes has the defects and has a certain potential risk. Many electric power researchers solve above not enough through access controlling means or adopt two sets of direct current system direct access flexible cross-over connection devices at storage battery input/output end, when unusual or need maintain, can improve direct current system's security and power supply reliability. However, the control device connects 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 are greatly increased to a certain extent; a flexible cross-over connection 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 overcome the defects and shortcomings in the prior art, the method for realizing mutual backup of the communication power supply and the operation power supply of the transformer substation is provided, and the direct current systems on two sides have no specification requirements, 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 seamlessly and uninterruptedly, so that the risk of the 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 operating power supply provided by the embodiment of the present application includes:
determining input and output voltages or powers in a communication power supply and an operation power supply of a transformer substation, 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 voltages or powers;
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 operation power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of a primary coil and a secondary coil in the high-frequency transformer is adjusted.
Optionally, the working mode of the high-frequency transformer is determined according to the current power supply backup requirement; the method comprises the following steps:
when the power supply is operated to backup the communication power supply, a high-frequency transformer voltage reduction mode is adopted; or
When the communication power supply backs up the operation power supply, a high-frequency transformer boosting mode is adopted.
Optionally, when the operating power supply backs up for the communication power supply, 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 the communication power supply is detected to be 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 an on-off state;
the energy output by the operation power supply is subjected to voltage reduction and rectification by a high-frequency transformer and then is output to a communication power supply output line seamlessly and uninterruptedly to be used as standby power supply of the communication power supply.
Optionally, when the communication power supply backs up for the operating power supply, a step-up mode of the high-frequency transformer is adopted, including:
the communication power supply is connected with the input end of the high-frequency transformer, and the operation power supply is connected with the output end of the high-frequency transformer;
when the abnormal operation of the operating power supply is detected, the PWM isolation driving module is quickly started, and the MOS module C and the MOS module D are controlled to be in an on-off state;
the energy output by the communication power supply is seamlessly and uninterruptedly output to an output line of the operation power supply after being boosted and rectified by the high-frequency transformer, and is used as standby power supply of the operation power supply.
Optionally, the guard backup device for the communication power supply and the operating power supply of the transformer substation realizes the function of mutual backup of the operating power supply and the communication power supply by adopting a unidirectional DC/DC conversion or a bidirectional DC/DC conversion mode.
Optionally, the implementation method further includes:
the communication power supply and the operation power supply are physically isolated from each other.
The beneficial effect that technical scheme that this application provided brought is:
the corresponding voltage boosting and reducing operation is realized by adjusting the turn ratio of the coils in the high-frequency transformer, and the method can be suitable for direct-current power supplies of any voltage class and power class to back up each other. Meanwhile, the backup power supply can supply power for abnormal direct-current power supply loads seamlessly and uninterruptedly, 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 needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method proposed in the present application;
FIG. 2 is a functional block diagram of an implementation of the present application;
FIG. 3 is a circuit diagram of an operating power supply for backup of a communication power supply;
fig. 4 is a circuit configuration diagram of the communication power supply as a backup of the operation power supply.
Detailed Description
To make the structure and advantages of the present application clearer, the structure of the present application will be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1, the method for implementing mutual backup between a substation communication power supply and an operating power supply provided in the embodiment of the present application includes:
11. determining input and output voltages or powers in a communication power supply and an operation power supply of a transformer substation, 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 voltages or powers;
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 operation power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of a primary coil and a secondary coil in the high-frequency transformer is adjusted.
In implementation, according to the implementation method of the mutual backup device of the substation communication power supply and the operating power supply, as shown in fig. 2, 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.
A middle tap is led out from a primary winding group of the high-frequency transformer B, and the MOS module C and the MOS module D are respectively connected with a primary coil leading-out wire 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 the real-time current and voltage 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 and processing acquired data, judging the running state 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 used for receiving an instruction sent by the CPU module and sending the instruction to the MOS module for driving the MOS module to control the MOS module to be turned on and turned off. A method for realizing a guard backup device of a substation communication power supply and an operation power supply comprises the following steps:
(1) a mutual backup device of a transformer substation communication power supply and an operation power supply is connected between a first direct-current power supply and a second direct-current power supply, 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 operating power supply backs up the communication power supply, as shown in fig. 3, the high-frequency transformer B adopts a step-down mode, the operating power supply is connected to the input end of the device, and the communication power supply 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 a communication power supply 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 communication power supply is output abnormally and the voltage and current values of the communication power supply change, the CPU module A immediately judges the abnormal condition, sends an instruction for starting a backup power supply to the PWM isolation driving module E, the PWM isolation driving module E intelligently adjusts the duty ratios of PWM1 and PWM2, controls the MOS module C and the MOS module D to be in a switch state, the energy output by the operation power supply is converted into alternating current after oscillation through the MOS module, and the alternating current is seamlessly and uninterruptedly supplied to the load of the communication power supply after voltage reduction and rectification through the high-frequency transformer B and is used as a backup power supply of the communication power supply.
(3) When the communication power supply backs up the operation power supply, as shown in fig. 4, the high-frequency transformer B adopts a step-up mode, the communication power supply is connected to the input terminal of the device, and the operation power supply is connected to the output terminal 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 operating 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 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, 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 ratios of PWM1 and PWM2, controls the MOS module C and the MOS module D to be in an on-off state, the energy output by the communication power supply is converted into alternating current after being vibrated by the MOS module, and the alternating current is seamlessly and uninterruptedly output after being boosted and rectified by the high-frequency transformer B to provide direct current electric energy for the load of the operation power supply to serve as a backup power supply of the operation power supply.
Optionally, the guard backup device for the communication power supply and the operating power supply of the transformer substation realizes the function of mutual backup of the operating power supply and the communication power supply by adopting a unidirectional DC/DC conversion or a bidirectional DC/DC conversion mode. The communication power supply and the operation power supply are physically isolated from each other.
The application provides a method for realizing a mutual backup device of a transformer substation communication power supply and an operation power supply, which has a wide application scene range and can be suitable for mutual backup of direct current power supplies of any voltage grade and power grade. The operation power supply can transmit energy through the voltage reduction mode to serve as a backup power supply of the communication power supply, and the communication power supply can transmit energy through the voltage boost mode to serve as a 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. The application of the application can enable the abnormal direct-current power supply and the backup power supply to be physically isolated from each other and not to be influenced mutually, and the backup power supply can supply power for the abnormal direct-current power supply load seamlessly, so that the risk of the direct-current power supply failure of the transformer substation is effectively reduced. By adopting the method and the device, the nuclear capacity discharge process of the storage battery of the transformer substation can be simplified, a backup power supply does not need to be additionally carried, complex short-time parallel switching is avoided, and great personnel, financial and material expenses are saved for the maintenance work of the storage battery.
The sequence numbers in the above embodiments are merely for description, and do not represent the sequence of the assembly or the use of the components.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. The method for realizing mutual backup of the transformer substation communication power supply and the operation power supply is characterized by comprising the following steps:
determining input and output voltages or powers in a communication power supply and an operation power supply of a transformer substation, 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 voltages or powers;
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 operation power supply or a communication power supply, and the power supply backup operation is completed after the turn ratio of a primary coil and a secondary coil in the high-frequency transformer is adjusted.
2. The method for realizing mutual backup of the substation communication power supply and the operating power supply according to claim 1, wherein the working mode of the high-frequency transformer is determined according to the current power supply backup requirement; the method comprises the following steps:
when the power supply is operated to backup the communication power supply, a high-frequency transformer voltage reduction mode is adopted; or
When the communication power supply backs up the operation power supply, a high-frequency transformer boosting mode is adopted.
3. The method for realizing mutual backup between a substation communication power supply and an operating power supply according to claim 2, wherein 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 the communication power supply is detected to be 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 an on-off state;
the energy output by the operation power supply is subjected to voltage reduction and rectification by a high-frequency transformer and then is output to a communication power supply output line seamlessly and uninterruptedly to be used as standby power supply of the communication power supply.
4. The method for realizing mutual backup between a substation communication power supply and an operating power supply according to claim 2, wherein when the communication power supply backs up the operating power supply, a high-frequency transformer boosting mode is adopted, and the method comprises the following steps:
the communication power supply is connected with the input end of the high-frequency transformer, and the operation power supply is connected with the output end of the high-frequency transformer;
when the abnormal operation of the operating power supply is detected, the PWM isolation driving module is quickly started, and the MOS module C and the MOS module D are controlled to be in an on-off state;
the energy output by the communication power supply is seamlessly and uninterruptedly output to an output line of the operation power supply after being boosted and rectified by the high-frequency transformer, and is used as standby power supply of the operation power supply.
5. The method for realizing mutual backup of the substation communication power supply and the operating power supply according to claim 1, wherein the substation communication power supply and operating power supply guard backup device realizes the mutual backup function of the operating power supply and the communication power supply by adopting a unidirectional DC/DC conversion or a bidirectional DC/DC conversion mode.
6. The method for realizing mutual backup of the substation communication power supply and the operating power supply according to claim 1, further comprising:
the communication power supply and the operation power supply are physically isolated from each other.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010257123.9A CN111490588B (en) | 2020-04-02 | 2020-04-02 | Method for realizing mutual backup of communication power supply and operation power supply of transformer substation |
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| CN202010257123.9A CN111490588B (en) | 2020-04-02 | 2020-04-02 | Method for realizing mutual backup of communication power supply and operation power supply of transformer substation |
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| CN111490588B CN111490588B (en) | 2023-07-14 |
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