CN115792451A - Automatic switching device and method for metering secondary current loop - Google Patents
Automatic switching device and method for metering secondary current loop Download PDFInfo
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- CN115792451A CN115792451A CN202211518733.5A CN202211518733A CN115792451A CN 115792451 A CN115792451 A CN 115792451A CN 202211518733 A CN202211518733 A CN 202211518733A CN 115792451 A CN115792451 A CN 115792451A
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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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Abstract
The application provides an automatic switching control equipment and method in measurement secondary current return circuit, is applied to the power supply user who is provided with dual supply, two main changes, includes: the switching module is electrically connected with a power supply main loop and a circuit power supply standby loop of a power supply user and is configured to switch transmission current and voltage of the main loop and the standby loop; the metering module is electrically connected with the switching module and is configured to meter the electric energy consumption of the user; wherein the metering module comprises: a metering device configured to meter and display the user's power consumption; and the negative control terminal is electrically connected with the metering instrument and is configured to remotely meter the electric energy consumption of a user so as to solve the problem that two groups of double-power switching devices are needed to realize the metering of double powers and combine the double powers into the same meter, and the real-time monitoring and metering cannot be carried out in the method for metering the secondary current loop.
Description
Technical Field
The application relates to the technical field of current metering devices, in particular to an automatic switching device and method for a metering secondary current loop.
Background
Aiming at the double power supplies in the existing power supply scheme, special transformer customers and residential quarters configured by double main transformers, and the situation that a main power supply point (transformer) and a standby power supply point (transformer) are periodically switched exists under the operation mode of one main transformer and one standby transformer, two electric meters (examination and check meters) and two load management terminals (power distribution terminals) are installed, so that one meter and one terminal are under the condition of no electricity, and the problem that the line loss of a main-standby community distribution transformer is correctly and automatically counted cannot be solved by adopting an installation auxiliary power supply at present.
In the scheme appearing in the existing industry, a current loop and a voltage loop are switched by two groups of double-power-supply conversion devices.
However, the space required by the scheme is relatively large, and the control loop is complex, so that the investment cost is increased, the pressure of a user is increased, and the later maintenance is not facilitated. The most important point, adopt dual power supply switching device to realize that dual power supply measurement merges and be same strapping table, dual power supply switching device all has a delayed process when switching over, like last power failure device is in the common use closing position, when stand-by power supply supplies power, dual power supply switching device need part commonly used earlier, then closes for subsequent use, there is a process of time delay in the middle of, just it has electricity to return to cause the reality to have, but one step of monitoring behind the meter meeting, can not do real-time supervision and measurement.
Disclosure of Invention
The embodiment of the application provides an automatic switching device and method for a metering secondary current loop, and aims to solve the technical problem that the existing metering secondary current loop method needs two groups of double-power switching devices to realize the combination of double-power metering into the same meter, the double-power switching devices have a time delay process in switching, if a power failure device is in a common switching-on position, when a standby power supply supplies power, the double-power switching devices need to be separated from each other firstly and then are switched on for standby, a time delay process is arranged in the middle, the fact that electricity is actually supplied is caused, but the meter can be monitored in the later step, and real-time monitoring and metering cannot be carried out.
The first aspect of the present application provides an automatic switching control equipment in measurement secondary current return circuit, is applied to the power supply user who is provided with dual supply, two main changes, includes:
the switching module is electrically connected with a power supply main loop and a circuit power supply standby loop of a power supply user and is configured to switch transmission current and voltage of the main loop and the standby loop;
the metering module is electrically connected with the switching module and is configured to meter the electric energy consumption of the user;
wherein the metering module comprises:
a metering device configured to meter and display the user's power consumption;
and the load control terminal is electrically connected with the metering instrument and is configured to remotely meter the electric energy consumption of the user.
In some embodiments, the automatic switching device for metering a secondary current loop further includes:
a junction box electrically connected with the metering device and the load control terminal and configured to protect equipment and a connection wire.
In some embodiments, the switching module further comprises:
a receiving unit configured to receive a transmission current, voltage, into the switching module;
the identification unit is electrically connected with the receiving unit and is configured to identify whether the transmission current and the voltage received by the receiving unit are the transmission current and the voltage of a main loop or the transmission current and the voltage of a standby loop;
the switching unit is electrically connected with the identification unit and is configured to switch to a main loop transmission current and a voltage for measurement or a standby loop transmission current and a voltage for measurement according to the identification information of the identification unit.
In some embodiments, the connection lines of the automatic switching device of the metering secondary current loop are insulated single-core copper wires.
In some embodiments, the diameter of the current secondary wire in the automatic switching device of the metering secondary current loop is more than or equal to 4mm 2 。
In some embodiments, the diameter of the voltage secondary wire in the automatic switching device of the metering secondary current loop is greater than or equal to 2.5mm 2 。
The second aspect of the present application provides an automatic switching method for a metering secondary current loop, which is applied to the automatic switching device for a metering secondary current loop, and includes:
based on the switching module, when the common power supply has power and the backup power supply has power failure, the normally closed points of the backup power supply contactor and the relay are taken to conduct the coils of the common power supply contactor and the relay, so that the voltage and the current of the common power supply are transmitted to the metering module, and the metering of a common power supply loop is realized; when the standby power supply is powered on and the common power supply is powered off, the normally closed points of the common power supply contactor and the relay are used for conducting the standby power supply contactor and the coil of the relay, so that the voltage and the current of the standby power supply are measured by the measuring module, and the measurement of the standby power supply loop is realized.
In some embodiments, the method for automatically switching a metering secondary current loop further includes:
based on the junction box, the automatic switching device of the secondary current metering loop is protected, and the connecting lines of the automatic switching device of the secondary current metering loop are connected through the junction box.
In some embodiments, when the switching unit of the switching module switches the main loop transmission current, the voltage measurement or the standby loop transmission current, the voltage measurement, the secondary current loop in the connection line of the automatic switching device for measuring the secondary current loop does not have an open circuit phenomenon, and the secondary voltage does not have a short circuit phenomenon.
The embodiment of the application provides a measure automatic switching control equipment in secondary current return circuit, is applied to the power supply user who is provided with dual supply, two main changes, includes: the switching module is electrically connected with a power supply main loop and a circuit power supply standby loop of a power supply user and is configured to switch transmission current and voltage of the main loop and the standby loop; the metering module is electrically connected with the switching module and is configured to meter the electric energy consumption of the user; wherein the metering module comprises: a metering device configured to meter and display the user's power consumption; and the negative control terminal is electrically connected with the metering instrument and is configured to remotely meter the electric energy consumption of the user so as to realize real-time switching and real-time metering of the voltage and current loops of the main and standby loops through an automatic switching device for metering the secondary current loop, and the problem of automatic calculation of the line loss of the transformer area can not occur.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an automatic switching device for a secondary current metering loop according to the present application;
fig. 2 is a flowchart of an automatic switching method of a metering secondary current loop according to the present application.
Description of reference numerals:
1-a switching module; 11-a receiving unit; 12-an identification unit; 13-a switching unit; 2-a junction box; 3-a metering module; 31-a metering device; 32-negative control terminal.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
In some technologies, the method for metering the secondary current loop needs to adopt two groups of double power supply switching devices to realize the dual power supply metering and merging into the same meter, the double power supply switching devices have a time delay process during switching, for example, the previous power failure device is at a common closing position, when a standby power supply supplies power, the double power supply switching devices need to be separated from a common use at first and then closed for standby, and a time delay process is arranged in the middle, so that the fact that the power is actually available is returned, but the meter can be monitored in the next step, and real-time monitoring and metering cannot be carried out, in order to solve the technical problem, the application provides the automatic switching device and the method for metering the secondary current loop, and the following description is carried out on the automatic switching device and the method for metering the secondary current loop:
as can be seen from fig. 1, the first aspect of the present application provides an automatic switching device for metering a secondary current loop, which is applied to a power supply user provided with dual power supplies and dual main transformers, and is characterized in that the automatic switching device comprises: the switching module 1 is electrically connected with a power supply main loop and a circuit power supply standby loop of a power supply user, and is configured to switch transmission current and voltage of the main loop and the standby loop; a metering module 3, wherein the metering module 3 is electrically connected with the switching module 1 and is configured to meter the electric energy consumption of a user; wherein the metering module 3 comprises: a metering device 31 configured to meter and display the user's power consumption; and the load control terminal 32 is electrically connected with the metering instrument and is configured to remotely meter the electric energy consumption of the user.
In this embodiment, the switching module 1 is connected to the main circuit and the standby circuit of the power supply user provided with dual power supplies and dual main transformers through a line, only one switching module is needed, and then the switching module is connected to the metering instrument 31 and the load control terminal 32 of the metering module 3 through lines, the switching module 1 can judge whether the current and the voltage entering the main loop or the voltage and the current of the standby loop are the current and the voltage of the main loop or the voltage and the current of the standby loop, and the voltage and the current of the main loop or the voltage and the current of the standby loop are measured according to the judgment result, so that the gapless switching is realized without switching the switching time, and the power consumption of the power supply user provided with the dual power supplies and the dual main transformers is checked by the metering instrument 31 of the metering module 3 or the load control terminal 32 of the metering module 3 is remotely checked.
It can be understood that the voltage and current of the main loop power supply and the voltage and current of the standby loop power supply are dynamically and intelligently switched to the metering device 31 and the negative control terminal 32 of the metering module 3 for metering through the switching module 1. When the main loop supplies power, the metering module 3 collects the voltage and the current of the main loop and meters the energy-consuming load in real time; when the standby circuit supplies power, the switching module 1 switches the voltage and the current to the standby circuit, and the metering module 3 collects the voltage and the current of the standby circuit in real time, so that the problem of automatic calculation of the line loss of the standby circuit meter and the terminal which are not on line and in a transformer area is solved.
Two sets of dual power conversion device of contrast installation, though also can reach same measurement result, the required space of this scheme is bigger, and control circuit is complicated, like this can increase investment cost, aggravates user's pressure, is unfavorable for the maintenance and the maintenance in later stage simultaneously, has the idle very extravagant resource of a dual power conversion device moreover when measuring. The most important point, adopt two dual power supply auto-change over devices to realize that two way power measurement merge into same strapping table, can appear in dual power supply auto-change over device the process of time delay appears in the switching over, for example last power failure device is in the position of commonly used closing the floodgate, when stand-by power supply supplies power, dual power supply auto-change over device need separately connect the dual power supply conversion equipment in major loop earlier, then launch dual power supply conversion equipment on the stand-by loop, there is a process of time delay in the centre, will cause to have electric current, voltage in the actual loop, but the current, voltage in the loop can be monitored to some late to the strapping table meter, do not reach real-time supervision and measurement, there is the measurement inaccurate, when the measurement module 3 loses the condition of electric current, voltage.
The switching module 1 is a device for connecting a main loop and a standby loop of a power supply user provided with a dual power supply and a dual main transformer in practical application, and can identify the current entering the switching module, the voltage of which is the voltage current of the main loop or the voltage current of the standby loop, and switch the main loop and the standby loop for metering; the metering module 3 is a device for metering the power consumption of a power supply user provided with a dual power supply and a dual main transformer.
As shown in fig. 1, the automatic switching device for metering a secondary current loop further includes: and a junction box 2 electrically connected to the metering device 31 and the load control terminal 32, and configured to protect equipment and a connection wire.
In this embodiment, the junction box 2 is connected between the switching module 1 and the connection lines of the metering instrument 31 and the negative control terminal 32 of the metering module 3, the switching module 1 is connected with the lines of the metering instrument 31 and the negative control terminal 32 of the metering module through the junction box 2 to perform a transition function, and the switching module 1 and the metering instrument 31 and the negative control terminal 32 of the metering module 3 are protected to prevent damage caused by excessive current and voltage.
As shown in fig. 1, the switching module 1 further includes: a receiving unit 11 configured to receive a transmission current, voltage, into the switching module 11; an identification unit 12, wherein the identification unit 12 is electrically connected to the receiving unit 11, and is configured to identify whether the transmission current, voltage received by the receiving unit 11 is the transmission current, voltage of the main loop or the transmission current, voltage of the backup loop; a switching unit 13, wherein the switching unit 13 is electrically connected to the identification unit 12, and is configured to switch to a main loop transmission current and a voltage for measurement or a standby loop transmission current and a voltage for measurement according to the identification information of the identification unit 12.
In this embodiment, when the current or voltage of the main loop or the standby loop of the power supply user with the dual power supplies and the dual main transformers enters the switching module 1, the current or voltage is collected by the receiving unit 11, and then the transmission current and voltage collected by the receiving unit 11 are identified by the identifying unit 12, so as to identify whether the received transmission current and voltage is the transmission current and voltage of the main loop or the transmission current and voltage of the standby loop, and transmit the identification information to the switching unit 13, and determine whether the measurement is performed by the transmission current and voltage of the main loop or the transmission current and voltage of the standby loop through the switching unit 13, so as to measure the current and voltage of the power supply user with the dual power supplies and the dual main transformers in real time through a secondary current loop switching device, thereby avoiding inaccurate current and voltage measurement results caused by the existence of a time delay phenomenon.
In some embodiments, the connection line of the automatic switching device for the metering secondary current loop adopts an insulating single-core copper wire, the single-core cable refers to only one wire in an insulating layer and is often used in the situation of overlarge voltage, when the single-core cable core wire passes through current, an aluminum cladding or a metal shielding layer is arranged, cross-linked magnetic lines of force are provided, induction voltage can be generated at two ends of the single-core cable core wire, so that voltage loss can not occur during transmission, the cross-sectional area ratio of the insulating single-core copper wire is small, the insulating single-core copper wire is not easily oxidized, short-circuit current impact resistance is achieved, and the service life is relatively long.
In some embodiments, the diameter of the current secondary wire in the automatic switching device of the metering secondary current loop is more than or equal to 4mm 2 To ensureThe safety of power consumption when the power supply user who is provided with dual supply, two main transformers uses the electric energy is proved, has also guaranteed that the transmission current is in the current secondary line in the automatic switching device of measurement secondary current return circuit can not take place too much current loss.
In some embodiments, the diameter of the voltage secondary wire in the automatic switching device of the metering secondary current loop is greater than or equal to 2.5mm 2 The safety of power consumption when guaranteeing the power supply user who is provided with dual supply, two main transformers uses the electric energy also has guaranteed that the transmission voltage is in the voltage secondary line in the automatic switching device of measurement secondary current return circuit can not take place too much voltage loss.
As shown in fig. 2, a second aspect of the present invention provides an automatic switching method for a secondary current metering circuit, which is applied to the automatic switching device for a secondary current metering circuit, and includes:
s110, based on the switching module, when the common power supply has power and the backup power supply has power failure, the normally closed points of the backup power supply contactor and the relay are taken to conduct the coils of the common power supply contactor and the relay, so that the voltage and the current of the common power supply are transmitted to the metering module, and the metering of a common power supply loop is realized; when the standby power supply is powered on and the common power supply is powered off, the normally closed points of the common power supply contactor and the relay are used for conducting the standby power supply contactor and the coil of the relay, so that the voltage and the current of the standby power supply are measured by the measuring module, and the measurement of the standby power supply loop is realized.
It can be understood that the voltage and current of the main loop power supply and the voltage and current of the standby loop power supply are dynamically and intelligently switched to the metering instrument 31 and the negative control terminal 32 of the metering module 3 for metering through the switching module 1. When the main loop supplies power, the metering module 3 collects the voltage and the current of the main loop and meters the energy load in real time; when the standby circuit supplies power, the switching module 1 switches the voltage and the current to the standby circuit, and the metering module 3 collects the voltage and the current of the standby circuit in real time, so that the problem of automatic calculation of the line loss of the standby circuit meter and the terminal which are not on line and in a transformer area is solved.
As can be seen from fig. 2, the automatic switching method of the metering secondary current loop further includes:
and S120, protecting the automatic switching device of the secondary current metering loop based on the junction box, and connecting the connecting lines of the automatic switching device of the secondary current metering loop through the junction box.
It can be understood that the junction box 2 is a connecting device for connecting the switching module 1 and the metering device 31 and the negative control terminal 32 of the metering module 3, and provides good protection for the switching module 1 and the metering device 31 and the negative control terminal 32 of the metering module 3, so as to prevent power utilization accidents caused by excessive transmission current and voltage.
In this embodiment, when the switching unit of the switching module switches the transmission current and the voltage measurement of the main circuit or the transmission current and the voltage measurement of the standby circuit, the secondary circuit in the connection circuit of the automatic switching device for measuring the secondary current circuit will not be opened, and the secondary voltage will not be short-circuited, so as to prevent the short-circuit or the open-circuit accident caused by the sudden line switching of the transmission current and the voltage of the main circuit and the standby circuit of the power supply user provided with the dual power supplies and the dual main transformers in the switching module 1.
The above embodiments, objects, technical solutions and advantages of the embodiments of the present application are described in further detail, and it should be understood that the above embodiments are only specific embodiments of the present application and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.
Claims (9)
1. The utility model provides an automatic switching control equipment in measurement secondary current return circuit, is applied to the power supply user who is provided with dual supply, two main changes, its characterized in that includes:
the switching module (1) is electrically connected with a power supply main loop and a circuit power supply standby loop of a power supply user, and is configured to switch transmission current and voltage of the main loop and the standby loop;
a metering module (3), the metering module (3) being electrically connected with the switching module (1) and configured to meter the user's electric energy consumption;
wherein the metering module (3) comprises:
a metering device (31) configured to meter and display the consumer's power consumption;
and the load control terminal (32) is electrically connected with the metering instrument and is configured to remotely meter the electric energy consumption of the user.
2. The automatic switching device for metering a secondary current loop according to claim 1, further comprising:
a junction box (2) electrically connected to the metering device (31) and the load control terminal (32) and configured to protect equipment and a connection wire.
3. The automatic switching device for metering secondary current circuits according to claim 1, characterized in that said switching module (1) further comprises:
a receiving unit (11) configured to receive a transmission current, voltage, into the switching module (11);
an identification unit (12), wherein the identification unit (12) is electrically connected with the receiving unit (11) and is configured to identify whether the transmission current, the voltage received by the receiving unit (11) is the transmission current, the voltage of a main loop or the transmission current, the voltage of a standby loop;
the switching unit (13) is electrically connected with the identification unit (12), and is configured to switch to a main loop transmission current and a voltage for measurement or a standby loop transmission current and a voltage for measurement according to the identification information of the identification unit (12).
4. The automatic switching device for a secondary current metering circuit as claimed in claim 1, wherein the connecting line of the automatic switching device for a secondary current metering circuit is an insulated single core copper wire.
5. The automatic switching device for metering secondary current of claim 1, wherein the diameter of the secondary current wire in the automatic switching device for metering secondary current is greater than or equal to 4mm 2 。
6. The automatic switching device for metering secondary current of claim 1, wherein the diameter of the secondary voltage wire in the automatic switching device for metering secondary current is greater than or equal to 2.5mm 2 。
7. An automatic switching method of a metering secondary current loop, which is applied to the automatic switching device of the metering secondary current loop in any one of claims 1 to 6, is characterized by comprising the following steps:
based on the switching module, when the common power supply has power and the backup power supply has power failure, the normally closed points of the backup power supply contactor and the relay are taken to conduct the coils of the common power supply contactor and the relay, so that the voltage and the current of the common power supply are transmitted to the metering module, and the metering of a common power supply loop is realized; when the standby power supply is powered on and the common power supply is powered off, the normally closed points of the common power supply contactor and the relay are used for conducting the standby power supply contactor and the coil of the relay, so that the voltage and the current of the standby power supply are measured by the measuring module, and the measurement of the standby power supply loop is realized.
8. The method of claim 7, further comprising:
based on the junction box, the automatic switching device for metering the secondary current loop is protected, and the connecting line of the automatic switching device for metering the secondary current loop is connected through the junction box.
9. The method as claimed in claim 7, wherein when the switching unit of the switching module switches the main loop transmission current, the voltage measurement or the standby loop transmission current, the voltage measurement, the secondary current loop in the connection line of the automatic switching device for measuring the secondary current loop will not be open-circuited, and the secondary voltage will not be short-circuited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518733.5A CN115792451A (en) | 2022-11-29 | 2022-11-29 | Automatic switching device and method for metering secondary current loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518733.5A CN115792451A (en) | 2022-11-29 | 2022-11-29 | Automatic switching device and method for metering secondary current loop |
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| CN115792451A true CN115792451A (en) | 2023-03-14 |
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| CN202211518733.5A Pending CN115792451A (en) | 2022-11-29 | 2022-11-29 | Automatic switching device and method for metering secondary current loop |
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| CN (1) | CN115792451A (en) |
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