CN111337727A - Current transformer and cloud computing-based current transformer information interaction system - Google Patents

Current transformer and cloud computing-based current transformer information interaction system Download PDF

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Publication number
CN111337727A
CN111337727A CN202010145827.7A CN202010145827A CN111337727A CN 111337727 A CN111337727 A CN 111337727A CN 202010145827 A CN202010145827 A CN 202010145827A CN 111337727 A CN111337727 A CN 111337727A
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China
Prior art keywords
mutual inductance
current mutual
inductance data
current
current transformer
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Pending
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CN202010145827.7A
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Chinese (zh)
Inventor
袁刚
栾尚鹏
石志泉
苏本超
赵苒
周红刚
吴光斌
马飞
栗刚
刘洪佳
付鹏远
王超
刘斌
付延东
王瑞辰
赵虎
王彤彤
孔伟伟
曹昌起
刘芳芳
杨涛
王利婧
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SHANDONG TAIKAI TRANSFORMER CO Ltd
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SHANDONG TAIKAI TRANSFORMER CO Ltd
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Priority to CN202010145827.7A priority Critical patent/CN111337727A/en
Publication of CN111337727A publication Critical patent/CN111337727A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423Input/output
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/40Structural association with built-in electric component, e.g. fuse
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20Instruments transformers
    • H01F38/22Instruments transformers for single phase ac
    • H01F38/28Current transformers
    • H01F38/30Constructions
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20Instruments transformers
    • H01F38/22Instruments transformers for single phase ac
    • H01F38/28Current transformers
    • H01F38/32Circuit arrangements

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

The invention provides a current transformer and a cloud computing-based current transformer information interaction system, wherein a first basin-type insulator is covered on a first side part of a left box body; a second basin-type insulator is covered on the first side part of the right box body; the first basin-type insulator is connected with the second basin-type insulator through a conducting rod; the second side part of the left box body and the second side part of the right box body are respectively connected with the middle connecting section; the detection end of the current transformer is in communication connection with the singlechip through an analog-to-digital conversion circuit; the single chip microcomputer obtains detection information of the current transformer through the analog-to-digital conversion circuit and sends the detection information to the cloud server through the wireless communication module. And integrating the signals by the cloud server. The transmission process is not influenced by the climate temperature and the distance, the problem of abnormal signals caused by short circuit of a transmission line is not needed, and the reliable and safe operation of the power system is ensured. The problem that if a short circuit grounding fault occurs in a transmission line, the transmission of signals is influenced, and the normal operation of a system is influenced is avoided.

Description

Current transformer and cloud computing-based current transformer information interaction system
Technical Field
The invention relates to the technical field of current transformers, in particular to a current transformer and a cloud computing-based current transformer information interaction system.
Background
The current transformer is an instrument for converting a large primary side current into a small secondary side current according to the electromagnetic induction principle to measure. The current transformer is composed of a closed iron core and a winding.
When the current transformer is used and installed, the current transformer signal is required to be transmitted to the metering device and the relay protection device through the connecting wire, a long line is required to be laid for signal transmission because the current transformer is far away from the metering device and the relay protection device, and for some projects, a large load of the current transformer is required to be designed to meet the requirement of long-distance signal transmission. If a short circuit and ground fault occurs in the transmission line, the transmission of signals is influenced, and the normal operation of the system is influenced.
Disclosure of Invention
In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a current transformer, comprising: the box body is provided with a conductive rod, a middle connecting section, a left box body and a right box body;
a first basin-type insulator is covered on the first side of the left box body;
a second basin-type insulator is covered on the first side part of the right box body;
the first basin-type insulator is connected with the second basin-type insulator through a conducting rod;
the second side part of the left box body and the second side part of the right box body are respectively connected with the middle connecting section;
a current transformer, a wireless communication module, an analog-to-digital conversion circuit and a single chip microcomputer are arranged in the middle connecting section;
the detection end of the current transformer is in communication connection with the singlechip through an analog-to-digital conversion circuit;
the single chip microcomputer obtains detection information of the current transformer through the analog-to-digital conversion circuit and sends the detection information to the cloud server through the wireless communication module.
It is further noted that a winding drum is arranged inside the middle connecting section; a current transformer coil is wound on the winding drum and connected with a detection board, and a detection end is connected on the detection board;
the upper part of the detection plate is fixedly provided with a junction box;
the wireless communication module, the analog-to-digital conversion circuit and the single chip microcomputer are respectively arranged in the junction box.
It should be further noted that, in the middle connection section, the left box body and the right box body are respectively filled with insulating media; the insulating medium is SF.
It should be further noted that the first end of the conducting rod passes through the first basin-type insulator, and the penetrating section is matched with the first side of the left box body through a nut, so that the first basin-type insulator is in sealing fit with the first side of the left box body, and a sealing rubber gasket is arranged at the sealing position;
the second end of conducting rod passes second basin formula insulator, and wears out the section and pass through the nut cooperation, makes the sealed cooperation of second basin formula insulator and the first side of right box, and sealed department sets up sealed cushion.
The invention also provides a current transformer information interaction system based on cloud computing, which comprises: the system comprises a cloud server and a current transformer;
the single chip microcomputer of the current transformer sends current mutual inductance data to the cloud server through the wireless communication module;
the cloud server receives current mutual inductance data transmitted by each current transformer, processes the current mutual inductance data, compares the received current mutual inductance data with a preset threshold value, and judges whether the current mutual inductance data exceeds the preset threshold value;
the cloud server stores the received current mutual inductance data in a database, and records a storage area of the current received current mutual inductance data in a log module writing mode;
the stored current mutual inductance data includes: the source of the current mutual inductance data, the pointer of the current mutual inductance data content and the state of the current mutual inductance data.
The cloud server is further used for configuring a current mutual inductance data storage history module, tracing each received current mutual inductance data, and creating a state unit for the current mutual inductance data at any time;
the state unit is a snapshot of current mutual inductance data at the current time, copies attributes, contents and source pointers of the current mutual inductance data, records all states of the current mutual inductance data, and stores all the states of the current mutual inductance data in a storage area of the current mutual inductance data.
The singlechip is further used for configuring current mutual inductance data with preset time length into a current mutual inductance data section;
when the current mutual inductance data section meets the preset uploading condition, encrypting the current mutual inductance data section, and uploading the current mutual inductance data section to a cloud server;
the uploading condition includes but is not limited to that the data volume of the transmitted single current mutual inductance data segment is larger than the preset volume;
or the data quantity of the plurality of current mutual inductance data segments is larger than or equal to a preset quantity.
It should be further noted that the single chip microcomputer is further configured to compress the current mutual inductance data segment, configure the identification bits on the compressed current mutual inductance data segment, and configure the current mutual inductance data segment in a continuous time period as a continuous identification bit; and configuring a compression current mutual inductance data section with a preset capacity, encrypting the compression current mutual inductance data section when the compression current mutual inductance data section meets a preset uploading condition, and uploading the encryption current mutual inductance data section to the cloud server.
According to the technical scheme, the invention has the following advantages:
each current transformer winding is connected with a terminal on the wiring board independently and is connected with the single chip microcomputer in the wiring box respectively, the single chip microcomputer processes different signals, analog signals of the current transformers are processed into digital signals, the digital signals are transmitted to the cloud server in real time, and the cloud server integrates the signals. The transmission process is not influenced by the climate temperature and the distance, the problem of abnormal signals caused by short circuit of a transmission line is not needed, and the reliable and safe operation of the power system is ensured.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, 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 based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a current transformer;
fig. 2 is a schematic diagram of a current transformer information interaction system based on cloud computing.
Detailed Description
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The present invention provides a current transformer, as shown in fig. 1 to 2, comprising: the box body 1 is provided with a conducting rod 3, a middle connecting section 13, a left box body 11 and a right box body 12;
a first basin-type insulator 13 is covered on the first side of the left box body 11; a second basin-type insulator 14 is covered on the first side part of the right box body 12; the first basin-type insulator 13 is connected with the second basin-type insulator 14 through the conducting rod 3; the second side of the left box body 11 and the second side of the right box body 12 are respectively connected with the middle connecting section 13; a current transformer, a wireless communication module 34, an analog-to-digital conversion circuit 32 and a single chip microcomputer 33 are arranged in the middle connecting section 13; the detection end of the current transformer is in communication connection with the singlechip 33 through an analog-to-digital conversion circuit 32; the single chip microcomputer 33 acquires detection information of the current transformer through the analog-to-digital conversion circuit 32, and sends the detection information to the cloud server 31 through the wireless communication module 34.
In the invention, a winding drum 15 is arranged in the middle connecting section 13; a current transformer coil 2 is wound on the winding drum 15, the current transformer coil 2 is connected with a detection plate 4, and a detection end is connected to the detection plate 4; the upper part of the detection plate 4 is fixedly provided with a junction box 5; the wireless communication module 34, the analog-to-digital conversion circuit 32 and the single chip microcomputer 33 are respectively arranged in the junction box 5.
The middle connecting section 13, the left box body 11 and the right box body 12 are respectively filled with insulating media; the insulating medium is SF 6.
The first end of the conducting rod 3 penetrates through the first basin-type insulator 13, and the penetrating section of the conducting rod is matched with the first basin-type insulator 13 through a nut, so that the first basin-type insulator 13 is in sealing fit with the first side of the left box body 11, and a sealing rubber gasket is arranged at the sealing position; the second end of conducting rod 3 passes second basin formula insulator 14, and wears out the section and pass through the nut cooperation, makes second basin formula insulator 14 and the sealed cooperation of the first side of right box 12, and sealed department sets up sealed cushion.
Here, each current transformer winding is individually connected to a terminal on the wiring board, and is respectively connected to the single chip microcomputer 33 in the wiring board, and the single chip microcomputer 33 processes different signals, processes the current transformer analog signal into a digital signal, and transmits the digital signal to the cloud server 31 in real time, and the cloud server 31 integrates the signal. The transmission process is not influenced by the weather temperature and the distance, the problem of signal abnormity caused by short circuit of a transmission line is solved, and the reliable and safe operation of the power system is ensured.
The invention also provides a current transformer information interaction system based on cloud computing, which comprises: a cloud server 31 and a current transformer 35;
the single chip microcomputer 33 of the current transformer sends current mutual inductance data to the cloud server 31 through the wireless communication module 34; the cloud server 31 receives current mutual inductance data transmitted by each current transformer, processes the current mutual inductance data, compares the received current mutual inductance data with a preset threshold value, and judges whether the current mutual inductance data exceeds the preset threshold value; the cloud server 31 stores the received current mutual inductance data in a database, and records the current received current mutual inductance data in a storage area by writing the current received current mutual inductance data into a log module; the stored current mutual inductance data includes: the source of the current mutual inductance data, the pointer of the current mutual inductance data content and the state of the current mutual inductance data.
The cloud server 31 is further configured to configure a current mutual inductance data storage history module, trace the source of each received current mutual inductance data, and create a state unit for the current mutual inductance data at any time; the state unit is a snapshot of current mutual inductance data at the current time, copies attributes, contents and source pointers of the current mutual inductance data, records all states of the current mutual inductance data, and stores all the states of the current mutual inductance data in a storage area of the current mutual inductance data.
In the invention, the cloud server 31 and the single chip microcomputer 33 of each current transformer can be in communication connection in a WEB mode based on a TCP (transmission control protocol). The user can be helped to realize the quick transmission and the timely transmission of the current mutual inductance data. The processing process of each current mutual inductance data is recorded by a log, so that the tracing is convenient, and the query and use of the current mutual inductance data can be facilitated.
In the invention, the single chip microcomputer 33 is also used for configuring the current mutual inductance data with preset time length into a current mutual inductance data section; when the current mutual inductance data segment meets the preset uploading condition, the current mutual inductance data segment is encrypted and uploaded to the cloud server 31; the uploading condition includes but is not limited to that the data volume of the transmitted single current mutual inductance data segment is larger than the preset volume; or the data quantity of the plurality of current mutual inductance data segments is larger than or equal to a preset quantity.
The cloud server 31 end is configured with a decryption program, so that the encrypted current mutual inductance data segment can be decrypted conveniently.
And the configuration mode of the current mutual inductance data section is a preset mode of the cloud server 31 and is sent to each single chip microcomputer 33, and the single chip microcomputer 33 configures the current mutual inductance data with preset time length into the current mutual inductance data section based on the preset mode.
The cloud server 31 may perform validity verification on the current mutual inductance data segment, store and process the current mutual inductance data segment passing the verification, and delete or early warn the current mutual inductance data segment not passing the verification.
The size of the current mutual inductance data segment can be set based on communication conditions and the importance of parameters related to the mutual inductor.
As a preferred embodiment, the single chip microcomputer 33 is further configured to compress the current mutual inductance data segment, configure identification bits on the compressed current mutual inductance data segment, and configure the current mutual inductance data segment in a continuous time period as a continuous identification bit; and configuring a compression current mutual inductance data segment with a preset capacity, encrypting the compression current mutual inductance data segment when the compression current mutual inductance data segment meets a preset uploading condition, and uploading the encryption current mutual inductance data segment to the cloud server 31.
The invention can realize the safety problem of current mutual inductance data segment transmission. The current mutual inductance data can be configured into one data file according to the requirement, and can also be a combination of a plurality of data files. And compression transmission is carried out, and the transmission load is reduced. The data transmission rate is improved, and the safety of data transmission is ensured.
Through the description of the above embodiments, those skilled in the art will readily understand that the cloud computing-based current transformer information interaction system described herein may be implemented by software, and may also be implemented by software in combination with necessary hardware. Therefore, the technical solution according to the disclosed embodiment of the cloud computing based current transformer information interaction system may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the indexing method according to the disclosed embodiment.
Those skilled in the art will appreciate that aspects of a cloud computing-based current transformer information interaction system may be embodied as a system, method, or program product. Accordingly, various aspects of the present disclosure may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A current transformer, comprising: the box body (1), the box body (1) is provided with a conducting rod (3), a middle connecting section (13), a left box body (11) and a right box body (12);
a first basin-type insulator (13) is covered on the first side part of the left box body (11);
a second basin-type insulator (14) is covered on the first side part of the right box body (12);
the first basin-type insulator (13) is connected with the second basin-type insulator (14) through the conducting rod (3);
the second side part of the left box body (11) and the second side part of the right box body (12) are respectively connected with the middle connecting section (13);
a current transformer, a wireless communication module, an analog-to-digital conversion circuit and a single chip microcomputer are arranged in the middle connecting section (13);
the detection end of the current transformer is in communication connection with the singlechip through an analog-to-digital conversion circuit;
the single chip microcomputer obtains detection information of the current transformer through the analog-to-digital conversion circuit and sends the detection information to the cloud server through the wireless communication module.
2. The current transformer of claim 1,
a winding drum (15) is arranged in the middle connecting section (13); a current transformer coil (2) is wound on the winding drum (15), the current transformer coil (2) is connected with a detection plate (4), and a detection end is connected to the detection plate (4);
the upper part of the detection plate (4) is fixedly provided with a junction box (5);
the wireless communication module, the analog-to-digital conversion circuit and the single chip microcomputer are respectively arranged in the junction box (5).
3. The current transformer of claim 1,
the middle connecting section (13), the left box body (11) and the right box body (12) are respectively filled with insulating media; the insulating medium is SF 6.
4. The current transformer of claim 1,
the first end of the conducting rod (3) penetrates through the first basin-type insulator (13), and the penetrating section is matched with the first basin-type insulator through a nut, so that the first basin-type insulator (13) is in sealing fit with the first side of the left box body (11), and a sealing rubber gasket is arranged at the sealing position;
the second end of conducting rod (3) passes second basin formula insulator (14), and wears out the section and pass through the nut cooperation, makes second basin formula insulator (14) and the sealed cooperation of the first side of right box (12), and sealed department sets up sealed cushion.
5. The utility model provides a current transformer information interaction system based on cloud, its characterized in that includes: a cloud server and the current transformer of claims 1 to 4;
the single chip microcomputer of the current transformer sends current mutual inductance data to the cloud server through the wireless communication module;
the cloud server receives current mutual inductance data transmitted by each current transformer, processes the current mutual inductance data, compares the received current mutual inductance data with a preset threshold value, and judges whether the current mutual inductance data exceeds the preset threshold value;
the cloud server stores the received current mutual inductance data in a database, and records a storage area of the current received current mutual inductance data in a log module writing mode;
the stored current mutual inductance data includes: the source of the current mutual inductance data, the pointer of the current mutual inductance data content and the state of the current mutual inductance data.
6. The cloud computing-based current transformer information interaction system of claim 5,
the cloud server is further used for configuring a current mutual inductance data storage history module, tracing each received current mutual inductance data, and creating a state unit for the current mutual inductance data at any time;
the state unit is a snapshot of current mutual inductance data at the current time, copies attributes, contents and source pointers of the current mutual inductance data, records all states of the current mutual inductance data, and stores all the states of the current mutual inductance data in a storage area of the current mutual inductance data.
7. The cloud computing-based current transformer information interaction system of claim 5,
the single chip microcomputer is also used for configuring current mutual inductance data with preset time length into a current mutual inductance data section;
when the current mutual inductance data section meets the preset uploading condition, encrypting the current mutual inductance data section, and uploading the current mutual inductance data section to a cloud server;
the uploading condition includes but is not limited to that the data volume of the transmitted single current mutual inductance data segment is larger than the preset volume;
or the data quantity of the plurality of current mutual inductance data segments is larger than or equal to a preset quantity.
8. The cloud computing-based current transformer information interaction system of claim 5,
the singlechip is also used for compressing the current mutual inductance data section, configuring identification bits on the compressed current mutual inductance data section, and configuring the current mutual inductance data section in continuous time periods as continuous identification bits;
and configuring a compression current mutual inductance data section with a preset capacity, encrypting the compression current mutual inductance data section when the compression current mutual inductance data section meets a preset uploading condition, and uploading the encryption current mutual inductance data section to the cloud server.
CN202010145827.7A 2020-03-05 2020-03-05 Current transformer and cloud computing-based current transformer information interaction system Pending CN111337727A (en)

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Application publication date: 20200626