CN112180138A - Intelligent current transformer - Google Patents
Intelligent current transformer Download PDFInfo
- Publication number
- CN112180138A CN112180138A CN202011150936.4A CN202011150936A CN112180138A CN 112180138 A CN112180138 A CN 112180138A CN 202011150936 A CN202011150936 A CN 202011150936A CN 112180138 A CN112180138 A CN 112180138A
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- magnetic core
- core coil
- circuit board
- current transformer
- bus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/066—Arrangements for avoiding or indicating fraudulent use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses an intelligent current transformer which comprises a transformer shell structure, a secondary wiring terminal, a 485 bus wiring terminal, an installation bottom plate, a terminal cover, a circuit board, a main magnetic core coil and an auxiliary magnetic core coil, wherein the main magnetic core coil, the auxiliary magnetic core coil and the circuit board are installed inside the transformer shell structure and encapsulated by epoxy resin, the secondary wiring terminal and the 485 bus wiring terminal are fixed on the transformer shell structure in a hot melting mode, the circuit board is connected with the 485 bus wiring terminal and an outlet wire of the auxiliary magnetic core coil, and the outlet wire of the main magnetic core coil is connected with the secondary wiring terminal. According to the invention, the data channel between the current transformer and the master station system is opened, the equipment information of the current transformer is collected, the unified management is realized, the electricity stealing checking function can be realized, the internal temperature of the current transformer can be monitored in real time, and the purposes of energy reduction and emission reduction are realized by means of low power consumption and self-power-taking design.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to an intelligent current transformer.
Background
In the power industry, to develop power systems of what voltage class and size, transformers of corresponding voltage class and accuracy are developed for the needs of measurement, protection and control of power systems. On one hand, the power industry in China develops at a high speed along with the rapid increase of economy, various energy sources such as fire, water, wind, light, nuclear and the like are all brilliant as important components of power transmission and transformation equipment, and the consumption of a current transformer increases at a speed of 8% every year; on the other hand, the current transformers are widely applied and are largely used in various industries, such as mining, metallurgy, rail transit, port logistics and the like, and the complexity of the installation environment is determined by industry differences. The number of equipment installations is increasing and the difficulty of equipment condition monitoring and maintenance is increasing linearly. At present, with the increasing maturity and perfection of carrier wave technology and wireless technology, information of devices such as electric energy meters and concentrators can be uploaded to a master station system, but a current transformer which is an important component of an acquisition system cannot be monitored and managed all the time.
The national power grid development planning indicates that the intelligent power grid electricity utilization information acquisition system in China needs to realize full coverage of all electricity utilization sites, and advanced metering equipment is used for acquiring and processing the electric energy state information of users in real time, and accurately and timely transmitting the electric energy state information to other related electric power application systems, so that electric power enterprises are assisted to complete various management and operation decisions. The method realizes 'full coverage and full collection' of power users in the system range of the national power grid company, effectively changes the situation that the information of the power users cannot be timely, completely and accurately mastered for a long time, meets the urgent requirements of various layers and various specialties of the national power grid company system on the power utilization information of the power users, and has important significance for promoting the company to realize historical spanning in the aspect of modern management. The information acquisition of the current transformer is also an important ring.
Current transformers are also widely used in other industries directly associated with non-national grid companies. Under the conditions of complex environment and a plurality of uncertain factors, the intelligent transformer can report the electric condition information, and can bring great convenience to users. Certainly, an intelligent acquisition terminal is installed near the current transformer, the state information of the current transformer is collected specially, and real-time monitoring of the transformer equipment can be achieved. In the service environment such as mine, track traffic, can have the easy ageing, narrow and small limited scheduling problem in operating space of circuit, complicated wiring mode has not only reduced equipment reliability and has increased the installation degree of difficulty, also can bring unknown safety risk. Therefore, the integrated design of the current transformer and the intelligent terminal is of great significance.
The current transformer equipment information is collected to realize unified management, and the method is an important subject to be solved urgently. The remote supervision of the installed equipment is realized, and a large amount of manpower and material resources can be avoided. Current transformer equipment information gathers, not only includes equipment model, electric current size, still relates to mutual-inductor state information, for example the inside coil of current transformer or magnetic core, because metering error that temperature variation leads to etc. this needs long-term data record to compare, and current transformer still belongs to blank in this respect at present. In addition, the output value of the current transformer is not monitored, and the machine can be used for avoiding electricity stealing. The diversification of electricity stealing behaviors makes the electricity stealing prevention measure unavailable.
Disclosure of Invention
In order to overcome the defects or shortcomings of the current transformer in the prior art, the invention provides the intelligent current transformer, which integrates the traditional transformer and an intelligent acquisition terminal, opens a data channel between the current transformer and a master station system, acquires the equipment information of the current transformer, realizes unified management, can realize the electricity stealing checking function, can monitor the internal temperature of the current transformer in real time, and realizes the purposes of energy reduction and emission reduction by means of low power consumption and self-power-taking design.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an intelligent current transformer, including mutual-inductor shell structure, main magnetic core coil, vice magnetic core coil, the circuit board, secondary binding post, 485 bus binding post, the terminal cover, mounting plate, its characterized in that, main magnetic core coil, vice magnetic core coil, the circuit board is installed inside mutual-inductor shell structure, secondary binding post and 485 bus binding post then fix on mutual-inductor shell structure through the mode of hot melt, the terminal cover passes through the screw fixation on mutual-inductor shell structure, mounting plate links to each other with mutual-inductor shell structure, wherein:
the main magnetic core coil is encapsulated by epoxy resin, the outgoing line of the main magnetic core coil is connected with a secondary wiring terminal, and meanwhile, the secondary wiring terminal is connected with an ammeter through a metering bus, so that current measurement is realized;
the secondary magnetic core coil is encapsulated by epoxy resin, an outgoing line of the secondary magnetic core coil is connected with the circuit board, the circuit board is powered by the electromagnetic induction principle, and a primary current value is collected and sent to the circuit board;
the circuit board is encapsulated by epoxy resin, is connected with a 485 bus wiring terminal and simultaneously receives primary current value information sent by the auxiliary magnetic core coil;
when the 485 bus wiring terminal is connected with the circuit board, the connection between an external ammeter and a special transformer terminal is realized, and a primary current value signal received by the circuit board is sent to the special transformer terminal;
the terminal cover ensures that the secondary wiring terminal and the 485 bus wiring terminal cannot be contacted randomly without damaging the terminal cover;
the mounting bottom plate is made of cold-rolled steel plates and used for mounting and fixing the current transformer.
Furthermore, the circuit board is provided with a 485 interface and a current sampling port, the circuit board is respectively connected with a 485 bus wiring terminal and an auxiliary magnetic core coil outgoing line and used for 485 communication and current measurement, and a measured current value can be uploaded to a special transformer terminal connected with the outside of the intelligent current transformer through the 485 bus.
Furthermore, the circuit board is provided with a temperature detection sensor, so that the internal temperature of the intelligent current transformer can be monitored in real time, and the monitoring function of the transformer precision along with the temperature change trend is realized.
Furthermore, the circuit board is provided with a super capacitor, and energy can be stored through the auxiliary magnetic core coil, so that the normal work of the circuit board is ensured.
Further, two current measurement values acquired by the main magnetic core coil and the auxiliary magnetic core coil are compared, if the measurement values are equal, electricity stealing behavior does not exist, and if the measurement values are not equal, electricity stealing behavior exists.
The invention has the beneficial effects that:
1. the information of the mutual inductor equipment is collected through the master station system, and unified management is achieved.
2. Through the real-time monitoring to current transformer output value, effectively prevent to steal the electric action.
3. The internal temperature of the current transformer is monitored in real time.
4. The purposes of energy reduction and emission reduction are realized by means of a low-power consumption and self-power-taking design.
Drawings
FIG. 1 is an external view of an intelligent current transformer of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the intelligent current transformer of the present invention;
FIG. 3 is a top view of the intelligent current transformer of the present invention;
FIG. 4 is a working block diagram of the intelligent current transformer of the present invention;
description of reference numerals:
1. a transformer enclosure structure; 2. a secondary wiring terminal; 3.485 bus connection terminal; 4. mounting a bottom plate; 5. a terminal cover; 6. a circuit board; 7. a main magnetic core coil; 8. a secondary core coil; 9. an electricity meter; 10. a special transformer terminal; 11.485 a bus; 12. a metering bus.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and the attached drawings.
As shown in fig. 1, fig. 2, fig. 3, an intelligent current transformer, including mutual inductor shell structure (1), secondary binding post (2), 485 bus binding post (3), mounting plate (4), terminal cover (5), circuit board (6), main magnetic core coil (7), vice magnetic core coil (8), wherein, main magnetic core coil (7), vice magnetic core coil (8), circuit board (6) are installed inside mutual inductor shell structure, use epoxy potting, secondary binding post (2) and 485 bus binding post (3) are fixed on mutual inductor shell structure (1) through the hot melt mode, terminal cover (5) pass through the fix with screw on mutual inductor shell structure (1), mounting plate (4) link to each other with mutual inductor shell structure (1).
The outgoing line of the main magnetic core coil (7) is connected with the secondary wiring terminal (2), and meanwhile, the secondary wiring terminal (2) is connected with an ammeter through a metering bus, so that current measurement is realized;
the secondary magnetic core coil (8) is connected with the circuit board (6) in an outgoing line mode, supplies power to the circuit board through the electromagnetic induction principle, collects primary current values and sends current value signals to the circuit board.
The circuit board (6) is connected with the 485 bus wiring terminal (3) and receives primary current value information sent by the auxiliary magnetic core coil (8).
When 485 bus binding post (3) and circuit board (6) are connected, realized being connected of outside ammeter and special transformer terminal, primary current value signal transmission who receives circuit board (6) simultaneously to special transformer terminal.
The terminal cover (5) ensures that the secondary wiring terminal (2) and the 485 bus wiring terminal (3) cannot be contacted randomly without damaging the terminal cover (5).
The mounting bottom plate (4) is made of cold-rolled steel plates and used for mounting and fixing the current transformer.
Furthermore, the circuit board (6) is provided with a 485 interface and a current sampling port, and is respectively connected with the 485 bus wiring terminal (3) and the secondary magnetic core coil (8) for 485 communication and current measurement, and the measured current value can be uploaded to the special transformer terminal (10) through the 485 bus.
Furthermore, the circuit board (6) is provided with a temperature monitoring sensor, so that the internal temperature of the intelligent current transformer can be monitored in real time, and the monitoring function of the transformer precision along with the temperature change trend is realized.
Furthermore, the circuit board (6) is provided with a super capacitor, and energy can be stored through the auxiliary magnetic core coil (8) to ensure that the circuit board works normally.
In the actual installation and use process, the bus bar penetrates through the intelligent current transformer, and the intelligent current transformer is fixed in the distribution box through the installation bottom plate (4). As shown in fig. 4, circuit board (6) have the temperature monitoring sensor, can carry out real-time supervision to intelligent current transformer's inside temperature, main magnetic core coil (7) can measure the busbar current, secondary binding post (2) is connected in outside ammeter (9), gather the busbar current value that will survey through metering bus (12), ammeter (9) link to each other through 485 bus (11) with special change terminal (10), the busbar current value and the temperature information that survey can upload master station system through special change terminal (10), intelligent current transformer just so can be by remote monitoring and management, solve the mutual-inductor supervision blind spot among the collection system. The secondary magnetic core coil (8) adopts a 10 x 5mm amorphous magnetic core, the number of winding turns is 1200, bus current can be measured simultaneously with the primary magnetic core coil (7), the outgoing line of the secondary magnetic core coil (8) is connected with a current sampling port of the circuit board (6), on one hand, the circuit board can be powered, on the one hand, bus current collection can be realized, the 485 interface of the circuit board (6) is connected with the 485 bus wiring terminal (3), the current value collected by the secondary magnetic core coil (8) is transmitted to the special transformer terminal (10) through the 485 bus, and further the master station system is uploaded. Thus, the special transformer terminal (10) can receive current measured values from the main magnetic core coil (7) and the auxiliary magnetic core coil (8) at the same time, the two measured values are compared, if the measured values are equal, electricity stealing behavior does not exist, and if the measured values are not equal, electricity stealing behavior exists. The common electricity stealing method causes the change of the current measurement value of the main magnetic core coil (7) and the change is different from the current measurement value of the auxiliary magnetic core coil (8), thereby judging whether electricity stealing behavior exists.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. The utility model provides an intelligent current transformer, including mutual-inductor shell structure, main magnetic core coil, vice magnetic core coil, the circuit board, secondary binding post, 485 bus binding post, the terminal cover, mounting plate, its characterized in that, main magnetic core coil, vice magnetic core coil, the circuit board is installed inside mutual-inductor shell structure, secondary binding post and 485 bus binding post then fix on mutual-inductor shell structure through the mode of hot melt, the terminal cover passes through the screw fixation on mutual-inductor shell structure, mounting plate links to each other with mutual-inductor shell structure, wherein:
the main magnetic core coil is encapsulated by epoxy resin, an outgoing line of the main magnetic core coil is connected with the secondary wiring terminal, and a bus current value is acquired through a metering bus connected with the secondary wiring terminal;
the secondary magnetic core coil is encapsulated by epoxy resin, an outgoing line of the secondary magnetic core coil is connected with the circuit board, the circuit board is powered by the electromagnetic induction principle, and a primary current value is acquired and a current value signal is sent to the circuit board;
the circuit board is encapsulated by epoxy resin, is connected with a 485 bus wiring terminal and simultaneously receives a primary current value signal sent by the auxiliary magnetic core coil;
the secondary wiring terminal is simultaneously connected with an external ammeter and a metering bus to realize current measurement;
the 485 bus wiring terminal is connected with the circuit board, meanwhile, the connection between an external ammeter and a special transformer terminal is realized, and meanwhile, a primary current value signal received by the circuit board is sent to the special transformer terminal;
the terminal cover ensures that the secondary wiring terminal and the 485 bus wiring terminal cannot be contacted randomly without damaging the terminal cover;
the mounting base plate is made of cold-rolled steel plates and used for mounting and fixing the current transformer.
2. The intelligent current transformer of claim 1, wherein the circuit board has a 485 interface and a current sampling port, which are respectively connected to a 485 bus connection terminal and an outlet of the secondary magnetic core coil, for 485 communication and current measurement, and the measured current value can be uploaded to a special transformer terminal connected to the outside of the intelligent current transformer through the 485 bus.
3. The intelligent current transformer of claim 1, wherein the circuit board is provided with a temperature detection sensor, so that the internal temperature of the intelligent current transformer can be monitored in real time, and the function of monitoring the variation trend of the precision of the intelligent current transformer along with the temperature is realized.
4. The intelligent current transformer of claim 1, wherein the circuit board has a super capacitor, and the circuit board can be ensured to work normally by storing energy through the secondary magnetic core coil.
5. The intelligent current transformer of claim 1, wherein two current measurements taken by the primary and secondary magnetic core coils are compared, and if the measurements are equal, there is no electricity stealing behavior, and if they are not equal, there is electricity stealing behavior.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150936.4A CN112180138A (en) | 2020-10-24 | 2020-10-24 | Intelligent current transformer |
| CA3130969A CA3130969C (en) | 2020-10-24 | 2021-09-16 | Intelligent current transformer |
| ATA50836/2021A AT524408A2 (en) | 2020-10-24 | 2021-10-20 | INTELLIGENT CURRENT TRANSFORMER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150936.4A CN112180138A (en) | 2020-10-24 | 2020-10-24 | Intelligent current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112180138A true CN112180138A (en) | 2021-01-05 |
Family
ID=73922647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011150936.4A Pending CN112180138A (en) | 2020-10-24 | 2020-10-24 | Intelligent current transformer |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112180138A (en) |
| AT (1) | AT524408A2 (en) |
| CA (1) | CA3130969C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295915A (en) * | 2021-07-27 | 2021-08-24 | 武汉中原电子信息有限公司 | Current calibration method and system for power grid collector and storage medium |
-
2020
- 2020-10-24 CN CN202011150936.4A patent/CN112180138A/en active Pending
-
2021
- 2021-09-16 CA CA3130969A patent/CA3130969C/en active Active
- 2021-10-20 AT ATA50836/2021A patent/AT524408A2/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295915A (en) * | 2021-07-27 | 2021-08-24 | 武汉中原电子信息有限公司 | Current calibration method and system for power grid collector and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CA3130969C (en) | 2023-10-24 |
| AT524408A2 (en) | 2022-05-15 |
| AT524408A8 (en) | 2022-07-15 |
| CA3130969A1 (en) | 2022-04-24 |
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