Intelligent earth leakage protection system based on Modbus and general packet radio service technology

Abstract

The utility model relates to the technical field of electric leakage protection, and particularly discloses an intelligent electric leakage protection system based on Modbus and a general packet radio service technology, which comprises a control center, the control center and a plurality of electric leakage protectors. The control center is further connected with a PC upper computer through a MODBUS bus, ferrite magnetic beads are connected in series at the input port and the output port of the leakage protector, and the ferrite magnetic beads serve as electromagnetic shielding covers of the residual current transformer. The utility model has the beneficial effects of simple structure and strong anti-interference capability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of leakage protection, especially an intelligent leakage protection system based on Modbus and general packet radio service technology. BACKGROUND

[0002] Leakage protection is a kind of safety protection measure that can automatically cut off power or send an alarm signal when the leakage current of the power grid exceeds a certain set value. Leakage protection in low-voltage power grids can prevent electric shock accidents; high-voltage power grids cannot completely prevent electric shock accidents, but can improve the safety of power grids and equipment. Leakage protectors, as commonly used devices for leakage protection measures, have been widely used in low-voltage power grids and high-voltage power grids.

[0003] However, the existing leakage protectors have poor anti-interference ability. Electromagnetic interference mainly affects the leakage protector through power supply end coupling. The power supply end suppresses pulse interference mainly through filtering. In actual application, the common filter is a power filter. However, due to the high transient pulse interference frequency band, lack of separate protection grounding, and other reasons, the power filter has weakened the suppression effect on high-frequency interference. SUMMARY

[0004] The utility model discloses a kind of intelligent leakage protection systems based on Modbus and general packet radio service technology to solve the above problems.

[0005] The technical scheme of the utility model for achieving the above-mentioned purpose is an intelligent leakage protection system based on Modbus and general packet radio service technology, comprising a control center, the control center and a plurality of leakage protectors, the control center and a plurality of leakage protectors are connected through MODBUS bus to implement data interaction, the control center is also connected with PC host computer through MODBUS bus, the input port and the output port of the leakage protector are both connected with ferrite magnetic beads in series, and the ferrite magnetic beads are used as electromagnetic shielding cover of residual current transformer.

[0006] The leakage protector includes an AVRAtmega microprocessor, a DS clock module one, an EEPROM one (electrically erasable programmable read-only memory), a man-machine interactive interface, a tripping state signal input module, a motor driving signal output module, a tripping device driving signal output module and a signal conditioning circuit, the signal interaction ports of the AVRAtmega microprocessor are connected with the DS clock module one, the EEPROM one and the man-machine interactive interface through ferrite magnetic beads and implement data interaction, the signal output ports of the AVRAtmega microprocessor are connected with the signal input of the motor driving signal output module and the signal input of the tripping device driving signal output module through ferrite magnetic beads, the signal input ports of the AVRAtmega microprocessor are connected with the signal output of the tripping state signal input module and the signal output of the signal conditioning circuit through ferrite magnetic beads, the signal input of the signal conditioning circuit is connected with the signal output of the leakage sensor, the signal output of the current sensor and the signal output of the voltage signal monitoring module, the AVRAtmega microprocessor is connected with the control center through the MODBUS bus and implements data interaction.

[0007] The data interaction ports of the AVRAtmega microprocessor are connected with the control center through the MODBUS bus and implement data interaction.

[0008] The control center includes an LPC processor, the data interaction ports of the LPC processor are connected with the MODBUS bus, a DS clock module two, an EEPROM two, a GPRS communication module and a control panel and implement data and signal interaction, the GPRS communication module implements information interaction with a user terminal.

[0009] The user terminal includes a mobile phone, an IPAD and a computer.

[0010] The ferrite magnetic bead has an inner diameter of 40.8mm, an outer diameter of 18.6mm and a length of 18.6mm.

[0011] Compared with the prior art, the leakage protector has the following beneficial effects:

[0012] The leakage protector has the following beneficial effects: the leakage protector has simple structure and convenient operation, can help the user to understand fault information in the shortest time and take corresponding measures, can also execute related operations according to user short message instructions, effectively avoids the misoperation of a circuit breaker caused by the coupling of a transient pulse into the input port and the output port, and reduces the leakage loss of the smart grid as much as possible BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a structural schematic view of the intelligent leakage protection system based on the Modbus and the general packet radio service technology.

[0014] Fig. 2Is the structure block diagram of the leakage protector of the utility model;

[0015] Fig. 3 Is the structure block diagram of the control center of the utility model;

[0016] In the figure, 1, control center;2, leakage protector;3, PC host computer;4, AVRAtmega32 microprocessor;5, DS1302 clock module one;6, EEPROM one;7, man-machine interface;8, split state signal input module;9, motor drive signal output module;10, tripping device drive signal output module;11, leakage sensor;12, current sensor;13, voltage signal monitoring module;14, LPC2103 processor;15, DS1302 clock module two;16, EEPROM two;17, GPRS communication module;18, signal conditioning circuit;19, control panel. DETAILED DESCRIPTION

[0017] The utility model is specifically described below in combination with the drawings, such as Figs. 1-3 As shown in the figure;

[0018] A kind of intelligent leakage protection system based on Modbus and general packet radio service technology, including control center, the control center 1 and several leakage protectors 2, the control center is respectively with several the leakage protector is implemented data interaction by MODBUS bus, the control center is also connected with PC host computer 3 by MODBUS bus, the input port and the output port of the leakage protector are all stringed ferrite magnetic beads, and the ferrite magnetic beads are used as electromagnetic shield of residual current transformer.

[0019] The leakage protector includes an AVR Atmega32 microprocessor 4, a DS1302 clock module 5, an EEPROM 6, a man-machine interface 7, a tripping state signal input module 8, a motor driving signal output module 9, a tripping device driving signal output module 10 and a signal conditioning circuit 18, the signal interaction ports of the AVR Atmega32 microprocessor are connected with the DS1302 clock module, the EEPROM and the man-machine interface through ferrite magnetic beads and implement data interaction, the signal output ports of the AVR Atmega32 microprocessor are connected with the signal input of the motor driving signal output module and the signal input of the tripping device driving signal output module through ferrite magnetic beads, the signal input ports of the AVR Atmega32 microprocessor are connected with the signal output of the tripping state signal input module and the signal output of the signal conditioning circuit through ferrite magnetic beads, the signal input of the signal conditioning circuit is connected with the signal output of the leakage sensor 11, the signal output of the current sensor 12 and the signal output of the voltage signal monitoring module 13, and the data interaction ports of the AVR Atmega32 microprocessor are connected with the control center through the MODBUS bus and implement data interaction.

[0020] The application point of the application is that the ferrite magnetic beads are introduced into the leakage protector to suppress high-frequency interference, and ferrite magnetic beads with long length, small inner diameter and large outer diameter are selected for effective suppression, wherein the size of the ferrite magnetic beads is 40.8 mm in inner diameter, 18.6 mm in outer diameter and 18.6 mm in length, and experiments show that the ferrite magnetic beads can well convert high-frequency interference energy into heat and dissipate it, thereby playing a certain degree of high-frequency isolation role.

[0021] It should be noted that the man-machine interface is composed of keys, a digital tube and an LED lamp, the microprocessor of the control center adopts an ARM7 series LPC2103, the GPRS communication module adopts a SIM300 of the SIMCOM company, and an electrostatic discharge device ESDA6VW5 of the ST company is applied to prevent electrostatic interference, the intelligent leakage protector takes the AVR Atmega32 microprocessor as the core, and obtains power line related information through various sensors.

[0022] The control center includes an LPC2103 processor 14, the data interaction ports of the LPC2103 processor are connected with the MODBUS bus, a DS1302 clock module 15, an EEPROM 16, a GPRS communication module 17 and a control panel 19 and implement data and signal interaction, and the GPRS communication module implements information interaction with a user terminal.

[0023] The user terminal includes a mobile phone, an IPAD and a computer.

[0024] It is to be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0025] The above technical solutions only reflect the preferred technical solutions of the present application, and some changes made by the skilled in the art to some parts thereof all reflect the principles of the present application and are within the protection scope of the present application.

Claims

1. A smart residual current protection system based on Modbus and general packet radio service technology, comprising a control center, the control center (1) and a plurality of residual current protectors (2), the control center respectively implements data interaction with a plurality of the residual current protectors through a MODBUS bus, and the control center is further connected with a PC host computer (3) through the MODBUS bus, characterized in that, The input port and the output port of the electric leakage protector are connected with ferrite magnetic beads in series, which are used as electromagnetic shielding cover of residual current transformer.

2. The intelligent residual current protective system based on Modbus and general packet radio service technology according to claim 1, characterized in that, The electric leakage protector comprises an AVRAtmega32 microprocessor (4), a DS1302 clock module (5), an EEPROM (6), a man-machine interface (7), a tripping state signal input module (8), a motor driving signal output module (9), a tripping device driving signal output module (10) and a signal conditioning circuit (18), the signal interaction port of the AVRAtmega32 microprocessor is connected with the DS1302 clock module, the EEPROM and the man-machine interface through ferrite magnetic beads and implements data interaction, the signal output port of the AVRAtmega32 microprocessor is connected with the signal input of the motor driving signal output module and the signal input of the tripping device driving signal output module through ferrite magnetic beads, the signal input port of the AVRAtmega32 microprocessor is connected with the signal output of the tripping state signal input module and the signal output of the signal conditioning circuit through ferrite magnetic beads, the signal input of the signal conditioning circuit is connected with the signal output of the electric leakage sensor (11), the signal output of the current sensor (12) and the signal output of the voltage signal monitoring module (13), the data interaction port of the AVRAtmega32 microprocessor is connected with the control center through the MODBUS bus and implements data interaction. 3.The intelligent residual current protection system based on Modbus and general packet radio service technology of claim 2, wherein, The control center comprises an LPC2103 processor (14), the data interaction port of the LPC2103 processor is connected with the MODBUS bus, a DS1302 clock module (15), an EEPROM (16), a GPRS communication module (17) and a control panel (19) and implements data and signal interaction, the GPRS communication module implements information interaction with a user terminal.

4. The intelligent residual current protective system based on Modbus and general packet radio service technology according to claim 3, characterized in that, The user terminal comprises a mobile phone, an IPAD and a computer.

5. The intelligent residual current protective system based on Modbus and general packet radio service technology according to claim 2, characterized in that, The ferrite magnetic bead has an inner diameter of 40.8 mm, an outer diameter of 18.6 mm and a length of 18.6 mm.

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