CN112751309A - Power utilization equipment protection system and protection method based on AIoT and current fingerprint - Google Patents
Power utilization equipment protection system and protection method based on AIoT and current fingerprint Download PDFInfo
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- CN112751309A CN112751309A CN202011615169.XA CN202011615169A CN112751309A CN 112751309 A CN112751309 A CN 112751309A CN 202011615169 A CN202011615169 A CN 202011615169A CN 112751309 A CN112751309 A CN 112751309A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 34
- 230000002159 abnormal effect Effects 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims description 11
- 238000012795 verification Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000003936 working memory Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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Abstract
The invention relates to an electric equipment protection system and a protection method based on AIoT and current fingerprints, which are matched with electric equipment, the circuit breaker is matched with one or more electric equipment, the working electric equipment is connected into a line and disconnected after judging that the abnormal electric equipment is judged, the current fingerprints of the current one or more electric equipment are obtained by an electric feedback module, the current one or more electric equipment is connected or disconnected by a communication feedback module, and the circuit breaker, the electric feedback module and the communication feedback module are matched with a controller and used for obtaining data of the electric feedback module and the communication feedback module to control the circuit breaker. The intelligent AI circuit breaker accurately identifies the current of the actual load equipment in the circuit through the AIoT technology and the current fingerprint technology of the intelligent AI circuit breaker, monitors the current in real time, analyzes the current condition of the line load equipment, records learning and judging, sets the actual accessed running current in a safety range of the circuit current in real time, and actually protects the electric equipment.
Description
Technical Field
The present invention relates to electrical switches; a relay; a selector; the technical field of emergency protection devices, in particular to an electric equipment protection system and a protection method based on AIoT and current fingerprints.
Background
The miniature circuit breaker is also called a miniature circuit breaker, is a device suitable for overload and short-circuit protection of a line with the alternating current of 50 or 60Hz, the rated voltage of below 400V and the rated current of below 63A, and can also be used for infrequent operation conversion of the line under normal conditions; the miniature circuit breaker has the characteristics of advanced structure, reliable performance, strong breaking capacity, attractive and small appearance and the like, so the miniature circuit breaker is mainly used in places such as industrial, commercial, high-rise and civil houses and the like, is used for overload and short-circuit protection of illumination, distribution lines and equipment of office buildings, houses and similar buildings, and can also be used for the purpose of infrequent on-off operation and switching of the lines.
In the prior art, the miniature circuit breaker estimates the possible load state of a circuit in advance through manpower and inputs an adjustable current setting fixed value, however, in the actual use process, the circuit is often mostly in an unsaturated state for a long time, and under the condition of small current load of the circuit, once a fault and overload of an electric device occur, the fault can not be identified because the circuit current can not reach the preset value in the early stage, so that the protection function on the electric device can not be realized, and an accident is caused.
Disclosure of Invention
The invention solves the problems in the prior art and provides an optimized AIoT and current fingerprint-based electric equipment protection system and a protection method.
The technical scheme adopted by the invention is that the system is matched with the arrangement of electric equipment and comprises the following components:
the circuit breaker is matched with one or more electric devices and is used for connecting the working electric devices into a line and disconnecting the working electric devices after judging abnormal electric devices;
the power utilization feedback module is used for acquiring current fingerprints of one or more current power utilization devices;
the communication feedback module is used for acquiring the current on-off state of one or more pieces of electric equipment;
and the control end is matched with the circuit breaker, the power consumption feedback module and the communication feedback module and is used for obtaining the data of the power consumption feedback module and the communication feedback module to control the circuit breaker.
Preferably, the power consumption feedback module comprises a sampling unit matched with any power consumption equipment, the sampling unit is connected with an amplifying unit and an MCU, and the MCU is matched with the control end.
Preferably, the sampling unit, the amplifying unit and the MCU are arranged on the control board.
Preferably, the communication feedback module comprises a communication unit arranged in cooperation with the MCU.
Preferably, the communication feedback module comprises a signal transmitting assembly arranged on the electric equipment, and the signal transmitting assembly is matched with the control end.
An electric equipment protection method of the electric equipment protection system based on AIoT and current fingerprint comprises the following steps:
step 1: sequentially configuring electric equipment at a control end;
step 2: starting any configured electric equipment, feeding back the communication feedback module to the control end, and distributing a working memory by the control end to start monitoring;
and step 3: the control end obtains the working current, the working voltage and the working power of the current electric equipment in real time through the electric feedback module;
and 4, step 4: and if the working current, the working voltage and the working power of the current electric equipment do not accord with the configured information of the electric equipment, the control end directly controls the circuit breaker to disconnect the current electric equipment, and if not, the step 3 is repeated.
Preferably, in the step 1, the ID, IP and port of the electric device are configured to the control end;
and the control end sends the verification data packet to the electric equipment, and the electric equipment returns the identification content in the verification data packet to the control end, so that the configuration is successful, otherwise, the configuration is reconfigured.
Preferably, the rated working current, the rated working voltage and the rated working power of the successfully configured electric equipment are obtained and stored in the database as the current fingerprint.
Preferably, the control end sends a heartbeat packet to the electric equipment which is not monitored at preset time intervals, and if any electric equipment returns preset information, the control end informs the current electric equipment to be concerned.
The invention provides an optimized AIoT and current fingerprint-based electric equipment protection system and a protection method, which are matched with electric equipment setting, are matched with one or more electric equipment through a circuit breaker and are used for connecting a working electric equipment into a circuit and disconnecting the working electric equipment after judging abnormal electric equipment, acquiring current fingerprints of one or more current electric equipment through an electric feedback module, acquiring the connection or disconnection of one or more current electric equipment through a communication feedback module, and are provided with controllers in a matching way with the circuit breaker, the electric feedback module and the communication feedback module and used for acquiring data of the electric feedback module and the communication feedback module to control the circuit breaker.
The intelligent AI circuit breaker accurately identifies the current of the actual load equipment in the circuit through the AIoT technology and the current fingerprint technology of the intelligent AI circuit breaker, monitors the current in real time, analyzes the operation condition of the current of the line load equipment, records, learns and judges, and can set the circuit current in a safety range in real time through the actually accessed operation current so as to actually protect the electric equipment.
Drawings
Fig. 1 is a schematic diagram of a system structure of the present invention, in which solid arrows indicate transmission directions of power consumption data, and dashed arrows indicate transmission directions of signals;
FIG. 2 is a flow chart of the method of the present invention.
Detailed Description
The present invention is described in further detail with reference to the following examples, but the scope of the present invention is not limited thereto.
The invention relates to an electric equipment protection system based on AIoT and current fingerprints, which is matched with electric equipment.
The invention fully utilizes the function that the existing electric equipment starts to be added with intelligent control more or less, utilizes AIoT fusing AI technology and IoT technology to perform networking management on the electric equipment, acquires the real-time working state of the electric equipment entering the network through current fingerprint technology, confirms the electric equipment through various modes, and can set the line current in a safety range in real time through the actually accessed running current.
The system comprises:
the circuit breaker is matched with one or more electric devices and is used for connecting the working electric devices into a line and disconnecting the working electric devices after judging abnormal electric devices;
the circuit breakers also play the role of electric switches, one or more electric devices are arranged in each circuit breaker in a matching mode, the electric devices normally work when the electric switches are closed, and the corresponding electric devices stop working when the control end controls the circuit breakers to be disconnected or manually controls the circuit breakers to be disconnected.
The power utilization feedback module is used for acquiring current fingerprints of one or more current power utilization devices;
the power consumption feedback module comprises a sampling unit matched with any power consumption equipment, the sampling unit is connected with an amplifying unit and an MCU, and the MCU is matched with the control end.
The sampling unit, the amplifying unit and the MCU are arranged on the control panel.
In the invention, the electric feedback module is used for sampling the electric equipment, the sampling includes but is not limited to real-time current and voltage, and the sampled information is amplified, integrated by the MCU and transmitted to the control end.
In the invention, a filtering unit is not generally arranged, so that the actual working condition of the current can be completely acquired by the control end.
The communication feedback module is used for acquiring the current on-off state of one or more pieces of electric equipment;
the communication feedback module comprises a communication unit matched with the MCU.
The communication feedback module comprises a signal transmitting assembly arranged on the electric equipment, and the signal transmitting assembly is matched with the control end.
In the invention, the communication feedback module and the power utilization feedback module work cooperatively, the communication feedback module is used for acquiring the 'working state' of the current power utilization equipment, and the power utilization feedback module is used for acquiring the working state of the current power utilization equipment.
In the present invention, the communication feedback module includes at least two setting embodiments:
the first implementation mode comprises the following steps:
a communication unit is directly configured in the MCU to communicate with the control end, which is different from the interaction between the power consumption feedback module and the control end, and the communication unit only transmits a single-level signal for turning on or off the power consumption equipment to the control end;
the second embodiment:
the signal transmitting assembly is arranged on the electric equipment, when the electric equipment is started, the signal transmitting assembly transmits a signal to the control end, and when the electric equipment is closed, the signal transmitting assembly stops transmitting.
In the present invention, the first and second embodiments may be combined or may be combined.
In the present invention, the communication connection is a content that is easily understood by those skilled in the art, and those skilled in the art can set itself according to the needs.
And the control end is matched with the circuit breaker, the power consumption feedback module and the communication feedback module and is used for obtaining the data of the power consumption feedback module and the communication feedback module to control the circuit breaker.
In the invention, the control end is actually a control platform end and is used for configuring the electric equipment, acquiring the power utilization information and the switch information of the electric equipment, and carrying out power utilization management based on the power utilization information and the switch information, wherein the electric equipment continuously works normally, otherwise, the electric equipment is forcibly closed by disconnecting the breaker, and the use safety of the electric equipment is ensured.
The invention also relates to an electric equipment protection method of the electric equipment protection system based on AIoT and current fingerprints, which comprises the following steps:
step 1: sequentially configuring electric equipment at a control end;
in the step 1, the ID, the IP and the port of the electric equipment are configured to the control end;
and the control end sends the verification data packet to the electric equipment, and the electric equipment returns the identification content in the verification data packet to the control end, so that the configuration is successful, otherwise, the configuration is reconfigured.
And acquiring rated working current, rated working voltage and rated working power of the successfully configured electric equipment, and storing the rated working current, the rated working voltage and the rated working power into a database as current fingerprints.
In the invention, the configuration content of the electric equipment comprises but is not limited to ID, IP and port, and is mainly used for finishing mutual authentication between the control end and the electric equipment, and the two sides can receive the information sent by the other side and send the information to the other side.
In the invention, the verification data packet is generally an encryption sequence, when the verification data packet is configured by matching with a mobile phone or a PC, a secret key can be sent to the mobile phone or the PC, after decryption, the electric equipment obtains the identification content in the encryption sequence, and after the electric equipment sends the identification content to the control end, the identification content can be mutually identified and successfully configured, and meanwhile, the mobile phone or the PC can be bound, thereby facilitating background management.
Step 2: starting any configured electric equipment, feeding back the communication feedback module to the control end, and distributing a working memory by the control end to start monitoring;
and step 3: the control end obtains the working current, the working voltage and the working power of the current electric equipment in real time through the electric feedback module;
in the invention, the electric equipment is started, the electric equipment sends working information to the control end through the communication feedback module, and the control end starts to monitor the power utilization condition of the electric equipment, including but not limited to obtaining the working current, the working voltage and the working power of the current electric equipment.
And 4, step 4: and if the working current, the working voltage and the working power of the current electric equipment do not accord with the configured information of the electric equipment, the control end directly controls the circuit breaker to disconnect the current electric equipment, and if not, the step 3 is repeated.
In the invention, in the actual monitoring process, when the working current, the working voltage and the working power of the electric equipment do not accord with the current fingerprint information, at least the working state of the electric equipment is not shown, so that disconnection is firstly processed and a notice is sent to a user; and the user judges the state of the electric equipment, and if the actual state of the electric equipment is normal, the current fingerprint of the electric equipment needs to be modified or a floating range value is configured for the electric equipment.
And the control end sends heartbeat packets to the electric equipment which is not monitored at preset time intervals, and if any electric equipment returns preset information, the control end informs the current electric equipment to be concerned.
In the invention, after the electric equipment is started, a signal is sent to the control end, but if the control end does not detect the electric data of the electric equipment all the time, the abnormal condition of the electric feedback module is indicated, so that a heartbeat packet needs to be sent to the electric equipment which is not monitored at preset time intervals, and attention needs to be paid under the condition of returning preset information, for example, under the thunderstorm environment, the electric equipment is powered off, but is not in a standby state.
Claims (9)
1. An electric equipment protection system based on AIoT and current fingerprint, the system cooperates with electric equipment setting, its characterized in that: the system comprises:
the circuit breaker is matched with one or more electric devices and is used for connecting the working electric devices into a line and disconnecting the working electric devices after judging abnormal electric devices;
the power utilization feedback module is used for acquiring current fingerprints of one or more current power utilization devices;
the communication feedback module is used for acquiring the current on-off state of one or more pieces of electric equipment;
and the control end is matched with the circuit breaker, the power consumption feedback module and the communication feedback module and is used for obtaining the data of the power consumption feedback module and the communication feedback module to control the circuit breaker.
2. The system of claim 1, wherein the AIoT and current fingerprint-based consumer protection system comprises: the power consumption feedback module comprises a sampling unit matched with any power consumption equipment, the sampling unit is connected with an amplifying unit and an MCU, and the MCU is matched with the control end.
3. The system of claim 2, wherein the AIoT and current fingerprint-based consumer protection system comprises: the sampling unit, the amplifying unit and the MCU are arranged on the control panel.
4. The electric equipment protection system based on AIoT and current fingerprint as claimed in claim 3, wherein: the communication feedback module comprises a communication unit matched with the MCU.
5. The system of claim 1, wherein the AIoT and current fingerprint-based consumer protection system comprises: the communication feedback module comprises a signal transmitting assembly arranged on the electric equipment, and the signal transmitting assembly is matched with the control end.
6. An electric equipment protection method of the electric equipment protection system based on AIoT and current fingerprint as claimed in any one of claims 1 to 5, characterized in that: the method comprises the following steps:
step 1: sequentially configuring electric equipment at a control end;
step 2: starting any configured electric equipment, feeding back the communication feedback module to the control end, and distributing a working memory by the control end to start monitoring;
and step 3: the control end obtains the working current, the working voltage and the working power of the current electric equipment in real time through the electric feedback module;
and 4, step 4: and if the working current, the working voltage and the working power of the current electric equipment do not accord with the configured information of the electric equipment, the control end directly controls the circuit breaker to disconnect the current electric equipment, and if not, the step 3 is repeated.
7. The electric equipment protection method of the electric equipment protection system based on AIoT and current fingerprint as claimed in claim 6, characterized in that: in the step 1, the ID, the IP and the port of the electric equipment are configured to the control end;
and the control end sends the verification data packet to the electric equipment, and the electric equipment returns the identification content in the verification data packet to the control end, so that the configuration is successful, otherwise, the configuration is reconfigured.
8. The electric equipment protection method of the electric equipment protection system based on AIoT and current fingerprint as claimed in claim 7, characterized in that: and acquiring rated working current, rated working voltage and rated working power of the successfully configured electric equipment, and storing the rated working current, the rated working voltage and the rated working power into a database as current fingerprints.
9. The electric equipment protection method of the electric equipment protection system based on AIoT and current fingerprint as claimed in claim 6, characterized in that: and the control end sends heartbeat packets to the electric equipment which is not monitored at preset time intervals, and if any electric equipment returns preset information, the control end informs the current electric equipment to be concerned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011615169.XA CN112751309B (en) | 2020-12-30 | Electric equipment protection system and protection method based on AIoT and current fingerprints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011615169.XA CN112751309B (en) | 2020-12-30 | Electric equipment protection system and protection method based on AIoT and current fingerprints |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112751309A true CN112751309A (en) | 2021-05-04 |
| CN112751309B CN112751309B (en) | 2024-07-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033219A (en) * | 2024-04-11 | 2024-05-14 | 广东中城智联科技有限公司 | Power utilization management method and system based on AI current fingerprint |
| CN118033219B (en) * | 2024-04-11 | 2024-07-02 | 广东中城智联科技有限公司 | Power utilization management method and system based on AI current fingerprint |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203084102U (en) * | 2012-12-25 | 2013-07-24 | 宁波奇科威数字信息技术有限公司 | Electric equipment detection device |
| CN104578400A (en) * | 2013-10-24 | 2015-04-29 | 上海天申电气设备有限公司 | Intelligent protection device and method for power distribution circuit breaker |
| CN105974223A (en) * | 2016-04-27 | 2016-09-28 | 深圳职业技术学院 | Method used for carrying out on-line detection on electric equipment work state and system thereof |
| CN108152620A (en) * | 2017-12-18 | 2018-06-12 | 北京航天测控技术有限公司 | A kind of efficiency monitoring analysis instrument of electrical equipment, system and method |
| CN109818423A (en) * | 2019-04-08 | 2019-05-28 | 国网福建省电力有限公司 | A kind of intelligent O&M distribution system based on management mode of taking the initiative in offering a hand |
| CN110007176A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of remote monitoring device and method of electrical equipment working condition |
| CN110119128A (en) * | 2019-04-19 | 2019-08-13 | 北京戴纳实验科技有限公司 | A kind of monitoring management system for use for laboratory electric equipment |
| CN110133362A (en) * | 2019-05-09 | 2019-08-16 | 国网山东省电力公司青岛市即墨区供电公司 | A kind of household electricity monitoring interactive terminal based on the ubiquitous Internet of Things of electric power |
| CN110672962A (en) * | 2019-10-22 | 2020-01-10 | 东莞市鸿茂物联网科技有限公司 | State monitoring system for electric equipment |
| CN111220872A (en) * | 2020-03-04 | 2020-06-02 | 独角兽网络科技（苏州）有限公司 | Method and system for monitoring electric equipment in real time |
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203084102U (en) * | 2012-12-25 | 2013-07-24 | 宁波奇科威数字信息技术有限公司 | Electric equipment detection device |
| CN104578400A (en) * | 2013-10-24 | 2015-04-29 | 上海天申电气设备有限公司 | Intelligent protection device and method for power distribution circuit breaker |
| CN105974223A (en) * | 2016-04-27 | 2016-09-28 | 深圳职业技术学院 | Method used for carrying out on-line detection on electric equipment work state and system thereof |
| CN108152620A (en) * | 2017-12-18 | 2018-06-12 | 北京航天测控技术有限公司 | A kind of efficiency monitoring analysis instrument of electrical equipment, system and method |
| CN109818423A (en) * | 2019-04-08 | 2019-05-28 | 国网福建省电力有限公司 | A kind of intelligent O&M distribution system based on management mode of taking the initiative in offering a hand |
| CN110119128A (en) * | 2019-04-19 | 2019-08-13 | 北京戴纳实验科技有限公司 | A kind of monitoring management system for use for laboratory electric equipment |
| CN110007176A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of remote monitoring device and method of electrical equipment working condition |
| CN110133362A (en) * | 2019-05-09 | 2019-08-16 | 国网山东省电力公司青岛市即墨区供电公司 | A kind of household electricity monitoring interactive terminal based on the ubiquitous Internet of Things of electric power |
| CN110672962A (en) * | 2019-10-22 | 2020-01-10 | 东莞市鸿茂物联网科技有限公司 | State monitoring system for electric equipment |
| CN111220872A (en) * | 2020-03-04 | 2020-06-02 | 独角兽网络科技（苏州）有限公司 | Method and system for monitoring electric equipment in real time |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033219A (en) * | 2024-04-11 | 2024-05-14 | 广东中城智联科技有限公司 | Power utilization management method and system based on AI current fingerprint |
| CN118033219B (en) * | 2024-04-11 | 2024-07-02 | 广东中城智联科技有限公司 | Power utilization management method and system based on AI current fingerprint |
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