CN112255568A - High-sensitivity electric leakage detection system and detection method thereof - Google Patents
High-sensitivity electric leakage detection system and detection method thereof Download PDFInfo
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- CN112255568A CN112255568A CN202011129681.3A CN202011129681A CN112255568A CN 112255568 A CN112255568 A CN 112255568A CN 202011129681 A CN202011129681 A CN 202011129681A CN 112255568 A CN112255568 A CN 112255568A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Abstract
The invention belongs to the technical field of intelligent electricity utilization, and particularly relates to a high-sensitivity electric leakage detection system and a detection method thereof. A high-sensitivity electric leakage detection system comprises a high-precision current transformer, a current-to-voltage module and the like; the output end of the high-precision current transformer is electrically connected with the input end of the current-to-voltage module, the output end of the current-to-voltage module is in signal connection with the input end of the single chip microcomputer, the output end of the single chip microcomputer is in signal connection with the communication module, the power supply module is electrically connected with the single chip microcomputer, and the communication module is in signal connection with the data transceiver module. According to the invention, leakage current is collected through the high-precision current transformer, ADC conversion processing is carried out through the 32-bit ARM single chip microcomputer, and finally, the leakage condition of the branch circuit can be detected in real time through filtering calculation, so that the detection flexibility is improved, operation and maintenance personnel can conveniently and accurately position which branch circuit is used for triggering leakage protection, and the purpose of simultaneously detecting and developing multiple loops of a large-scale power distribution cabinet is achieved.
Description
Technical Field
The invention belongs to the technical field of intelligent electricity utilization, and particularly relates to a high-sensitivity electric leakage detection system and a detection method thereof.
Background
The conventional device is generally a small function on an electrical fire combined detector, and cannot meet the requirement of multi-loop detection of a large-scale power distribution cabinet, and in the prior art, single-path leakage detection can only detect total leakage and branch leakage cannot be detected, so that the high-sensitivity leakage detection system and the detection method thereof which can simultaneously detect and develop multiple loops of the large-scale power distribution cabinet are urgently needed to be researched and developed.
Disclosure of Invention
Technical problem to be solved
The invention provides a high-sensitivity electric leakage detection system and a detection method thereof, which can be used for simultaneously detecting and developing multiple loops of a large-scale power distribution cabinet, and aims to overcome the defects that the traditional equipment generally has a small function on an electric fire combined detector, cannot meet the detection requirement of the multiple loops of the large-scale power distribution cabinet, and in the prior art, single-loop electric leakage detection can only detect total electric leakage and cannot detect branch electric leakage.
(II) technical scheme
The invention is realized by the following technical scheme: the invention provides a high-sensitivity leakage detection system which comprises a high-precision current transformer, a current-to-voltage conversion module, a single chip microcomputer, a power supply module, a communication module, a data transceiving module and a network cloud; the output end of the high-precision current transformer is electrically connected with the input end of the current-to-voltage module, the output end of the current-to-voltage module is in signal connection with the input end of the single chip microcomputer, the output end of the single chip microcomputer is in signal connection with the communication module, the power supply module is electrically connected with the single chip microcomputer, the communication module is in signal connection with the data transceiver module,
the data receiving and transmitting module is in signal connection with the network cloud end;
the high-precision current transformer is used for inputting leakage current;
the current-to-voltage conversion module is used for rectifying leakage current and converting the leakage current into voltage;
the single chip microcomputer is used for collecting voltage and converting the voltage into signal data to carry out filtering cleaning, filtering processing, data judgment, state judgment, fault judgment and data storage;
the communication module is used for converting the signal data processed by the singlechip into communication signals;
the data transceiving module is used for sending the communication signal to the network cloud;
and the network cloud is used for data query and parameter setting of the communication signals.
Further, the high-precision current transformer is a zero sequence transformer.
Further, the current-to-voltage module is provided with a rectifier bridge and a current-to-voltage circuit; the rectifying bridge is connected with the current-to-voltage circuit.
Furthermore, the single chip microcomputer consists of an acquisition circuit, a master control MCU and an EEPROM,
the singlechip is a 32-bit ARM singlechip.
Further, the network cloud is upper computer software.
A detection method of a high-sensitivity electric leakage detection system comprises the following steps; the high-precision current transformer is connected with leakage current, the leakage current of the high-precision current transformer is input into a current-to-voltage conversion module, the current-to-voltage conversion module conducts rectification on the leakage current and converts the leakage current into a micro-voltage, the micro-voltage is conducted on the single chip microcomputer, filtering cleaning and data judgment are conducted, the single chip microcomputer stores default parameters and modified parameters, and finally, relevant data are obtained and modified through the communication module and the data receiving and sending module through the network cloud.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, leakage current is collected through the high-precision current transformer, ADC conversion processing is carried out through the 32-bit ARM single chip microcomputer, and finally, the leakage condition of the branch circuit can be detected in real time through filtering calculation, so that the detection flexibility is improved, operation and maintenance personnel can conveniently and accurately position which branch circuit is used for triggering leakage protection, and the purpose of simultaneously detecting and developing multiple loops of a large-scale power distribution cabinet is achieved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a high-sensitivity leakage detection system according to the present invention.
Fig. 2 is a flow chart of the high-sensitivity leakage detection system according to the present invention.
Fig. 3 is a block diagram of a current-to-voltage module of the high-sensitivity leakage detection system according to the present invention.
Fig. 4 is a single chip microcomputer unit diagram of the high-sensitivity electric leakage detection system of the invention.
Fig. 5 is a block diagram of a communication module of the high-sensitivity electrical leakage detection system of the present invention.
Fig. 6 is a peripheral circuit diagram of the single chip microcomputer of the high-sensitivity electric leakage detection system of the invention.
Fig. 7 is a diagram of a single chip microcomputer baud rate selection unit of the high-sensitivity electric leakage detection system of the invention.
Fig. 8 is a diagram of a data storage unit of a single chip microcomputer of the high-sensitivity electric leakage detection system of the invention.
Detailed Description
In the technical scheme:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A high-sensitivity electric leakage detection system is shown in figures 1-8 and comprises a high-precision current transformer, a current-to-voltage conversion module, a single chip microcomputer, a power supply module, a communication module, a data receiving and transmitting module and a network cloud end; the output end of the high-precision current transformer is electrically connected with the input end of the current-to-voltage module, the output end of the current-to-voltage module is in signal connection with the input end of the single chip microcomputer, the output end of the single chip microcomputer is in signal connection with the communication module, the power supply module is electrically connected with the single chip microcomputer, the communication module is in signal connection with the data receiving and sending module, and the data receiving and sending module is in signal connection with the network cloud;
the high-precision current transformer is used for inputting leakage current;
the current-to-voltage conversion module is used for rectifying leakage current and converting the leakage current into voltage;
the single chip microcomputer is used for collecting voltage and converting the voltage into signal data to carry out filtering cleaning, filtering processing, data judgment, state judgment, fault judgment and data storage;
the communication module is used for converting the signal data processed by the singlechip into communication signals;
the data transceiving module is used for sending the communication signal to the network cloud;
the network cloud is used for data query and parameter setting of communication signals;
the high-precision current transformer is a zero sequence transformer;
the current-to-voltage conversion module is provided with a rectifier bridge and a current-to-voltage conversion circuit; the rectifier bridge is connected with the current-to-voltage circuit;
the single chip microcomputer consists of an acquisition circuit, a master control MCU and an EEPROM,
the singlechip is a 32-bit ARM singlechip;
the network cloud is upper computer software;
a detection method of a high-sensitivity electric leakage detection system comprises the following steps; the high-precision current transformer is connected with leakage current, the leakage current of the high-precision current transformer is input into a current-to-voltage conversion module, the current-to-voltage conversion module conducts rectification on the leakage current and converts the leakage current into a micro-voltage, the micro-voltage is conducted on the single chip microcomputer, filtering cleaning and data judgment are conducted, the single chip microcomputer stores default parameters and modified parameters, and finally, relevant data are obtained and modified through the communication module and the data receiving and sending module through the network cloud.
The following table is data which is read and written by a register of the singlechip microcomputer and used for the singlechip microcomputer to acquire a signal of certain leakage current;
according to the invention, the leakage current is collected through the high-precision current transformer, ADC conversion processing is carried out through the 32-bit ARM single chip microcomputer, and finally, the leakage condition of the branch circuit can be detected in real time through filtering calculation, so that the detection flexibility is improved, operation and maintenance personnel can conveniently and accurately position which branch circuit is used for triggering leakage protection, and the purpose of simultaneously detecting and developing multiple loops of a large-scale power distribution cabinet is achieved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A high sensitivity electrical leakage detection system, characterized by: the system comprises a high-precision current transformer, a current-to-voltage module, a single chip microcomputer, a power supply module, a communication module, a data transceiving module and a network cloud; the output end of the high-precision current transformer is electrically connected with the input end of the current-to-voltage module, the output end of the current-to-voltage module is in signal connection with the input end of the single chip microcomputer, the output end of the single chip microcomputer is in signal connection with the communication module, the power supply module is electrically connected with the single chip microcomputer, the communication module is in signal connection with the data receiving and sending module, and the data receiving and sending module is in signal connection with the network cloud;
the high-precision current transformer is used for inputting leakage current;
the current-to-voltage conversion module is used for rectifying leakage current and converting the leakage current into voltage;
the single chip microcomputer is used for collecting voltage and converting the voltage into signal data to carry out filtering cleaning, filtering processing, data judgment, state judgment, fault judgment and data storage;
the communication module is used for converting the signal data processed by the singlechip into communication signals;
the data transceiving module is used for sending the communication signal to the network cloud;
and the network cloud is used for data query and parameter setting of the communication signals.
2. A high-sensitivity electrical leakage detection system according to claim 1, wherein: the high-precision current transformer is a zero sequence transformer.
3. The system and the method as claimed in claim 1, wherein the system comprises: the current-to-voltage conversion module is provided with a rectifier bridge and a current-to-voltage conversion circuit; the rectifier bridge is connected with the current-to-voltage circuit.
4. A high-sensitivity electrical leakage detection system according to claim 1, wherein: the single chip microcomputer is composed of an acquisition circuit, a master control MCU and an EEPROM, and is a 32-bit ARM single chip microcomputer.
5. A high-sensitivity electrical leakage detection system according to claim 1, wherein: the communication module is an RS485 communication chip.
6. A high-sensitivity electrical leakage detection system according to claim 1, wherein: the network cloud is upper computer software.
7. The detection method of a high-sensitivity electric leakage detection system according to any one of claims 1 to 6, characterized in that: the detection method is as follows; the high-precision current transformer is connected with leakage current, the leakage current of the high-precision current transformer is input into the current-to-voltage conversion module, the current-to-voltage conversion module conducts rectification on the leakage current and converts the leakage current into a micro-voltage signal, the micro-voltage signal is collected by the single chip microcomputer, filtering cleaning and data judgment are conducted, the single chip microcomputer stores default parameters and modified parameters, and finally, relevant data are obtained and modified through the communication module and the data transceiver module in the cloud of the network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129681.3A CN112255568A (en) | 2020-10-21 | 2020-10-21 | High-sensitivity electric leakage detection system and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011129681.3A CN112255568A (en) | 2020-10-21 | 2020-10-21 | High-sensitivity electric leakage detection system and detection method thereof |
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| CN112255568A true CN112255568A (en) | 2021-01-22 |
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| CN202011129681.3A Pending CN112255568A (en) | 2020-10-21 | 2020-10-21 | High-sensitivity electric leakage detection system and detection method thereof |
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