CN210669518U - Line protection system based on intelligent electric power instrument - Google Patents

Line protection system based on intelligent electric power instrument Download PDF

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Publication number
CN210669518U
CN210669518U CN201821983784.4U CN201821983784U CN210669518U CN 210669518 U CN210669518 U CN 210669518U CN 201821983784 U CN201821983784 U CN 201821983784U CN 210669518 U CN210669518 U CN 210669518U
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module
data acquisition
protection system
line protection
communication module
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CN201821983784.4U
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Chinese (zh)
Inventor
陈天圣
张民恕
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Zhuhai Pilot Technology Co ltd
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Zhuhai Pilot Technology Co ltd
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Abstract

The utility model discloses a line protection system based on intelligent electric power instrument, include: the device comprises a controller module, a storage module, a data acquisition module, a switch module and a communication module, wherein the storage module, the data acquisition module, the switch module and the communication module are respectively connected with the controller module. The precision and the protection response speed are improved by adopting an independent metering chip and an ARM chip; the on-site real-time waveform display and data statistical analysis functions are realized; the method adopts a communication and graphic LCD combined mode, and friendly realization of flexibility of human-computer interaction is realized; the large-capacity storage is adopted, fault events and waveform recording are achieved, and big data statistics and analysis are convenient to carry out.

Description

Line protection system based on intelligent electric power instrument
Technical Field
The utility model relates to an electrical technology and automation especially relate to a circuit protection system based on intelligent electric power instrument.
Background
At present, with the development of computers and the popularization of smart power grids, microcomputer protection is increasingly used for power transmission and distribution to replace conventional relay protection, and intelligent circuit protection devices are widely used for substations, power transmission incoming lines or outgoing lines in power systems. The market line protection device has limited protection function, uneven functions, few detection items, low detection precision, waveform and harmonic lack, spectrum analysis function, slow response of fault information push and no mutual friendliness.
The prior art discloses a microcomputer protection device which has partial line protection function and can measure voltage, current, power and power factor.
The prior art also discloses a line protection device and a power distribution protection device, and the devices also have a line protection function, but are based on high-voltage and high-current measurement, have limited precision, are mainly designed for special application occasions, have limited protection function and are intelligent, but the degree of network interconnection self-adaption is not high.
The prior art also discloses a line protection device which does not have a real-time statistical analysis function, real-time waveform display, large-capacity storage, and a big data analysis function.
For the prior art scheme, the method has the defects of low storage capacity, lack of a big data analysis function, limited protection function, few detection items, low precision, unfriendly man-machine interaction and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a line protection system based on an intelligent electric power instrument, which adopts an independent controller module and a data acquisition module, thus improving the precision and the protection response speed; the large-capacity storage is adopted, fault events and waveform recording are achieved, and big data statistics and analysis are convenient to carry out.
The utility model discloses an one of the purpose adopts following technical scheme to realize:
a line protection system based on intelligent power meters, comprising: the device comprises a controller module, a storage module, a data acquisition module, a switch module and a communication module, wherein the storage module, the data acquisition module, the switch module and the communication module are respectively connected with the controller module.
Further, the controller module comprises a microcontroller and a display screen unit, the display screen unit is connected with the microcontroller, and the microcontroller is respectively connected with the storage module, the data acquisition module, the switch module and the communication module.
Furthermore, the data acquisition module comprises a current and voltage data acquisition module and a temperature measurement acquisition module, and the current and voltage data acquisition module and the temperature measurement acquisition module are respectively connected with the controller module.
Further, the communication module comprises a wired communication module and a wireless communication module, and the wireless communication module and the wired communication module are respectively connected with the controller module.
Further, the system further comprises an expansion interface module, and the expansion interface module is connected with the controller module.
Further, the current and voltage data acquisition module is a CT/PT mutual inductor.
Further, the switch module is a contactor or a circuit breaker.
Further, the microcontroller is an ARM chip.
Further, the wired communication module is a 485 bus, and the wireless communication module is a LORA remote radio module.
Furthermore, the expansion interface module comprises a switching value input module and a switching value output module, and the switching value input module and the switching value output module are respectively connected with the controller module.
Compared with the prior art, the beneficial effects of the utility model reside in that: the problems of low integration level, incomplete function and the like of the protection device in the market are solved; due to the adoption of the independent metering chip and the ARM chip, the problems of low precision and low protection response speed in the prior art are solved; the functions of field real-time waveform display and data statistical analysis are achieved; the method adopts a communication and graphic LCD combined mode, and friendly realization of flexibility of human-computer interaction is realized; the large-capacity storage is adopted, fault events and waveform recording are achieved, and big data statistics and analysis are convenient to carry out.
Drawings
Fig. 1 is a block diagram of a line protection system based on an intelligent power meter according to a first embodiment of the present invention;
in the figure: 1. a controller module; 2. a storage module; 3. a data acquisition module; 4. a switch module; 5. a communication module; 6. an expansion interface module; 11. a microcontroller; 12. a display screen unit; 31. a current and voltage data acquisition module; 32. a temperature measurement acquisition module; 51. a wired communication module; 52. a wireless communication module; 61. a switching value input module; 62. and a switching value output module.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
Referring to fig. 1, it is a block diagram of a line protection system based on an intelligent power meter according to a first embodiment of the present invention. The line protection system based on the intelligent electric power meter of the embodiment comprises: the intelligent controller comprises a controller module 1, a storage module 2, a data acquisition module 3, a switch module 4, a communication module 5 and an expansion interface module 6, wherein the storage module 2, the data acquisition module 3, the switch module 4, the communication module 5 and the expansion interface module 6 are respectively connected with the controller module 1.
The controller module further comprises a microcontroller 11 and a display screen unit 12, the display screen unit 12 is connected with the microcontroller 11, and the microcontroller 11 is respectively connected with the storage module 2, the data acquisition module 3, the switch module 4, the communication module 5 and the expansion interface module 6.
The data acquisition module 3 further comprises a current and voltage data acquisition module 31 and a temperature measurement acquisition module 32, and the current and voltage data acquisition module 31 and the temperature measurement acquisition module 32 are respectively connected with the controller module 1.
The current and voltage data acquisition module 31 is a CT/PT mutual inductor; the switch module 4 is a contactor or a breaker; the microcontroller 11 is an ARM chip.
The communication module 5 further comprises a wired communication module 51 and a wireless communication module 52, the wired communication module 52 and the wired communication module 51 are respectively connected with the controller module 1, the wired communication module 51 is a 485 bus, and the wireless communication module 52 is a LORA remote radio module.
The expansion interface module 6 further includes a switching value input module 61 and a switching value output module 62, and the switching value input module 61 and the switching value output module 62 are respectively connected to the controller module 1.
The embodiment of the utility model provides an in, circuit protection system based on intelligent electric power instrument is applicable to the electric power system field, and when being applied to the electric power system field, current and voltage data acquisition module 31 gathers electric current and voltage data, temperature measurement acquisition module 32 and gathers temperature data, with temperature data transfer to microcontroller 11, microcontroller 11 receives electric current and voltage data with temperature data handles the back, judges whether have overcurrent overload or the high risk of temperature to with data storage to storage module 2, judge when microcontroller 11 and exist during the risk, turn-off switch module 4. The problems of low integration level, incomplete functions and the like of the protection device in the market are solved. Due to the fact that the independent metering chip and the ARM chip are adopted, the problems that in the prior art, accuracy is low, and protection response speed is low are solved.
In the embodiment of the utility model, the separated structure design of the controller module and the CT/PT mutual inductor is adopted, so that the CT/PT mutual inductor can be conveniently replaced to adapt to various measuring ranges, and the measuring precision can be effectively controlled; meanwhile, the installation volume of the main machine is also reduced. The protection functions include instantaneous quick-break protection, overcurrent 1 section protection, overcurrent 2 section protection, inverse time limit overcurrent protection, inverse time limit zero sequence overcurrent protection, timing time limit zero sequence overcurrent protection, unbalance protection, leakage protection, overvoltage protection, undervoltage protection, overload protection, underload protection, grounding protection, TV disconnection protection, external fault linkage protection, analog input over-threshold protection, analog input under-threshold protection and temperature protection.
In the embodiment of the utility model, the mode of combining the wired communication and the wireless communication is adopted, and the wired communication module adopts industrial MODBUS-RTU protocol, 485 bus; the wireless communication module adopts LORA wireless communication, thereby greatly facilitating the access of the system and greatly saving the wiring space.
In the embodiment of the utility model, the storage module 2 stores the data received by the microcontroller, and realizes the function of recording and storing fault waveforms, harmonic waves and the function of spectrum analysis; realizing the operation event recording function, including the operation time, the event type and the fault event recording function; when protection events such as alarming, tripping and the like occur, real-time waveform viewing, real-time measurement data viewing and display are realized.
The embodiment of the utility model provides an in, microcontroller 11 passes through communication module 5 and conveys received data to display screen unit 12, adopts communication and figure LCD combination mode, has realized human-computer interaction's flexibility friendly.
It should be noted that the above-described device embodiments are merely illustrative, and units illustrated as separate components may or may not be physically separate, and components illustrated as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is communication connection between them, and specifically, the connection relationship can be implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (8)

1. A line protection system based on an intelligent power instrument is characterized by comprising a controller module, a storage module, a data acquisition module, a switch module and a communication module, wherein the storage module, the data acquisition module, the switch module and the communication module are respectively connected with the controller module; the data acquisition module comprises a current and voltage data acquisition module and a temperature measurement acquisition module, and the current and voltage data acquisition module and the temperature measurement acquisition module are respectively connected with the controller module; the controller module is connected with the switching value input module and the switching value output module respectively.
2. The intelligent power meter-based line protection system of claim 1, wherein the controller module comprises a microcontroller and a display screen unit, the display screen unit is connected with the microcontroller, and the microcontroller is respectively connected with the storage module, the data acquisition module, the switch module and the communication module.
3. A smart power meter based line protection system as claimed in claim 1, wherein said communication module comprises a wired communication module and a wireless communication module, said wireless communication module and said wired communication module being connected to said controller module respectively.
4. A smart power meter based line protection system according to claim 1, wherein the system includes an extended interface module, the extended interface module being connected to the controller module.
5. A line protection system based on intelligent electric power meter according to claim 3, characterized in that the current and voltage data acquisition module is a CT/PT transformer.
6. A smart power meter based line protection system as claimed in claim 1, wherein the switch module is a contactor or a circuit breaker.
7. A smart power meter based line protection system as claimed in claim 2 wherein said microcontroller is an ARM chip.
8. A line protection system based on a smart power meter as claimed in claim 3, wherein said wired communication module is a 485 bus and said wireless communication module is a LORA remote radio module.
CN201821983784.4U 2018-11-28 2018-11-28 Line protection system based on intelligent electric power instrument Active CN210669518U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821983784.4U CN210669518U (en) 2018-11-28 2018-11-28 Line protection system based on intelligent electric power instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821983784.4U CN210669518U (en) 2018-11-28 2018-11-28 Line protection system based on intelligent electric power instrument

Publications (1)

Publication Number Publication Date
CN210669518U true CN210669518U (en) 2020-06-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821983784.4U Active CN210669518U (en) 2018-11-28 2018-11-28 Line protection system based on intelligent electric power instrument

Country Status (1)

Country Link
CN (1) CN210669518U (en)

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