阅读说明：本技术 一种基于NB-IoT的带剩余电流检测功能的配网系统及终端 (NB-IoT-based network distribution system with residual current detection function and terminal ) 是由 余武军 马巧娟 王勤龙 钱肖新 孙林忠 傅亮 于 2019-08-12 设计创作，主要内容包括：本发明公开一种基于NB-IoT的带剩余电流检测功能的配网系统,包括：检测模块、设置模块、NB-IoT无线通信模块、微控制处理模块；所述微控制处理模块分别与检测模块、设置模块、NB-IoT无线通信模块连接；所述微控制处理模块,用于控制并管理检测模块、设置模块、NB-IoT无线通信模块产生的数据；所述检测模块,用于检测处理后的剩余电流值及掉电瞬间的剩余电流值；所述设置模块,用于对配网系统的本地数据设置相关参数；所述NB-IoT无线通信模块,用于实现远程无线数据的传输。(The invention discloses an NB-IoT-based network distribution system with a residual current detection function, which comprises: the device comprises a detection module, a setting module, an NB-IoT wireless communication module and a micro-control processing module; the micro-control processing module is respectively connected with the detection module, the setting module and the NB-IoT wireless communication module; the micro-control processing module is used for controlling and managing data generated by the detection module, the setting module and the NB-IoT wireless communication module; the detection module is used for detecting the processed residual current value and the residual current value at the moment of power failure; the setting module is used for setting relevant parameters for local data of the distribution network system; the NB-IoT wireless communication module is used for realizing the transmission of remote wireless data.)

1. an NB-IoT based networking system with residual current detection functionality, comprising: the device comprises a detection module, a setting module, an NB-IoT wireless communication module and a micro-control processing module; the micro-control processing module is respectively connected with the detection module, the setting module and the NB-IoT wireless communication module;

The micro-control processing module is used for controlling and managing data generated by the detection module, the setting module and the NB-IoT wireless communication module;

The detection module is used for detecting the processed residual current value and the residual current value at the moment of power failure;

the setting module is used for setting relevant parameters for local data of the distribution network system;

The NB-IoT wireless communication module is used for realizing the transmission of remote wireless data.

2. The NB-IoT based distribution network system with residual current detection function according to claim 1, wherein the detection module comprises a current detection circuit module, a power failure detection circuit module;

the current detection circuit module is connected with the micro-control processing module and is used for processing the collected residual current value to obtain an accurate residual current value;

and the power failure detection circuit module is connected with the micro control processing module and used for reporting the detected residual current value at the moment of power failure and the real-time point after the micro control processing module detects a power failure signal.

3. The NB-IoT-based network distribution system with the residual current detection function as claimed in claim 1, wherein the setting module comprises an RS485 communication circuit module and an infrared receiving circuit module;

The RS485 communication circuit module is connected with the micro-control processing module and is used for setting and communicating local data parameters of the distribution network system through wires;

the infrared receiving circuit module is connected with the micro-control processing module and is used for setting and maintaining local data parameters of the distribution network system through wireless.

4. the NB-IoT based networking system with residual current detection functionality according to claim 1, further comprising:

The storage module is used for storing data information in the distribution network system;

And the power supply module is used for providing electric energy for the detection module, the setting module, the NB-IoT wireless communication module, the storage module and the micro-control processing module.

5. The NB-IoT based networking system with residual current detection functionality according to claim 2, further comprising:

And the standby power supply circuit module is used for actively reporting the power failure event data at the moment of power failure and providing electric energy.

6. the NB-IoT based distribution network system with residual current detection function according to claim 4, further comprising an LED indicating circuit module for indicating the operation status and communication status of the distribution network system.

7. The NB-IoT-based network distribution system with the residual current detection function as claimed in claim 2, wherein the current detection circuit module is specifically configured to obtain an accurate residual current value from the collected residual current value through a sampling resistor, an operational amplifier, a micro-control processing module and current calibration; the collected residual current value is collected by a pincerlike residual current transformer.

8. The NB-IoT based power distribution system with residual current detection function as claimed in claim 5, wherein the backup power circuit module is implemented by a farad capacitor.

9. The NB-IoT based network distribution system with residual current detection function according to claim 1, wherein the data information in the storage module comprises maximum residual current per minute, maximum residual current per day, real time and auxiliary data information.

10. An NB-IoT based distribution network terminal with residual current detection function, characterized in that the NB-IoT based distribution network system with residual current detection function is provided with any one of the claims 1-9.

Technical Field

The invention relates to the technical field of power distribution networks, in particular to an NB-IoT-based distribution network system with a residual current detection function and a terminal.

background

the intelligent total protection integrates an electric leakage relay, an alternating current contactor and an electric leakage circuit breaker, and the total protection is used as the last 'insurance' of the low-voltage outgoing line residual current action protection in the rural power grid area and plays a decisive role in the safe operation of the rural low-voltage power grid. The total protection trip often causes the power loss of tens of or even hundreds of low-voltage users in the transformer area, and has great influence on the satisfaction degree of the power supply service. Therefore, how to promote the intelligent level of rural power grid distribution equipment operation, reduce the total protection trip-out rate, know the potential safety hazard point of power consumption in advance, accurate location fault point shortens the rush-repair time, promotes the rural power grid power supply reliability, becomes the first difficult problem that current power supply bureau (institute) faced.

As is well known, two types of devices for detecting residual current in power supply lines are available, one is a residual current operated protector, that is, a so-called earth leakage breaker, disconnects a power line when detecting that a remaining current value of the power line exceeds a certain threshold value, so as to achieve the purpose of protecting the safety of electric equipment, human bodies and property, the other type is a residual current detector, a portable residual current detecting meter which is generally powered by a dry battery is adopted, the device is used for detecting the current residual current value by field maintenance personnel to carry out troubleshooting on a fault point, but the residual current is generated at any time due to the randomness of various environmental factors of a power supply line and the uncertainty of the power utilization condition, particularly when power is cut off or the total protection is tripped out, the difficulty of troubleshooting is increased, time and labor are wasted, and whether all fault points are debugged and maintained or not can be determined during power test and transmission, so that safe power transmission can be realized. Therefore, the power failure time is long and the unreliability of power supply caused by the long fault point elimination period can certainly cause the dissatisfaction of a user to a power supply management department, and meanwhile, the power utilization potential safety hazard of the user is not early-warned, and the passive 'sheep death and reinforcement' type fault elimination and maintenance can not meet the requirement of intelligent management of power distribution safety more and more.

Disclosure of Invention

the invention aims to provide an NB-IoT-based power distribution network system with a residual current detection function and a terminal, aiming at the defects of the prior art, which can monitor and record the maximum value of the minute and the day residual current of a power supply line on line in real time, generate a corresponding data curve, report to a master station in a timing mode and be used for analyzing and early warning abnormal nodes by a power supply management department.

in order to achieve the purpose, the invention adopts the following technical scheme:

An NB-IoT based networking system with residual current detection functionality, comprising: the device comprises a detection module, a setting module, an NB-IoT wireless communication module and a micro-control processing module; the micro-control processing module is respectively connected with the detection module, the setting module and the NB-IoT wireless communication module;

The micro-control processing module is used for controlling and managing data generated by the detection module, the setting module and the NB-IoT wireless communication module;

The detection module is used for detecting the processed residual current value and the residual current value at the moment of power failure;

The setting module is used for setting relevant parameters for local data of the distribution network system;

the NB-IoT wireless communication module is used for realizing the transmission of remote wireless data.

furthermore, the detection module comprises a current detection circuit module and a power failure detection circuit module;

The current detection circuit module is connected with the micro-control processing module and is used for processing the collected residual current value to obtain an accurate residual current value;

and the power failure detection circuit module is connected with the micro control processing module and used for reporting the detected residual current value at the moment of power failure and the real-time point after the micro control processing module detects a power failure signal.

Further, the setting module comprises an RS485 communication circuit module and an infrared receiving circuit module;

The RS485 communication circuit module is connected with the micro-control processing module and is used for setting and communicating local data parameters of the distribution network system through wires;

The infrared receiving circuit module is connected with the micro-control processing module and is used for setting and maintaining local data parameters of the distribution network system through wireless.

further, the method also comprises the following steps:

the storage module is used for storing data information in the distribution network system;

And the power supply module is used for providing electric energy for the detection module, the setting module, the NB-IoT wireless communication module, the storage module and the micro-control processing module.

Further, the method also comprises the following steps:

And the standby power supply circuit module is used for actively reporting the power failure event data at the moment of power failure and providing electric energy.

Furthermore, the system also comprises an LED indicating circuit module which is used for indicating the running state and the communication state of the distribution network system.

further, the current detection circuit module is specifically used for obtaining an accurate residual current value after the collected residual current value is subjected to sampling resistance, an operational amplifier, a micro-control processing module and current calibration; the collected residual current value is collected by a pincerlike residual current transformer.

Furthermore, the standby power supply circuit module is realized through a farad capacitor.

Further, the data information in the storage module comprises a maximum remaining current value per minute, a maximum remaining current value per day, real-time and auxiliary data information.

Correspondingly, a NB-IoT based distribution network terminal with residual current detection function is further provided, which comprises an NB-IoT based distribution network system with residual current detection function according to any one of claims 1 to 9.

compared with the prior art, the invention has the following advantages:

1. the invention is fixedly installed in a distribution box at the low-voltage side or the user side of a transformer area, monitors the residual current and the power failure state of a power supply line on line in real time, reports related information data to a master station regularly or actively in real time through NB-IoT, and can be used for inquiring or warning and displaying the related data on a mobile phone APP carried by field operation and maintenance personnel.

2. The invention can monitor and record the maximum value of the minute and the daily residual current of the power supply line on line in real time, generate a corresponding data curve of the minute maximum residual current and the daily maximum residual current, and report the data curve to the master station at regular time for the power supply management department to analyze and early warn abnormal nodes, thereby being beneficial to the power supply management department to eliminate the abnormal nodes in advance and eliminate potential safety hazards in advance in a targeted manner.

3. When the monitored residual current of the power supply line exceeds the set threshold value, the invention actively reports the residual current overrun event to the master station for the on-site operation and maintenance personnel to carry out targeted investigation and processing before the total protection is not tripped, thereby greatly reducing the tripping frequency of the total protection and ensuring the safety of power supply and power utilization.

4. when abnormal power failure of a power supply line is monitored, the method and the system actively report the residual current event at the moment of power failure to the master station, are used for site operation and maintenance personnel to accurately position the range of power failure users in a distribution area, solve the power failure users more quickly and ensure that all the faults of the power failure users are safely tested and transmitted.

Drawings

Fig. 1 is a configuration network system structure diagram with a residual current detection function based on NB-IoT according to an embodiment;

Fig. 2 is a circuit diagram of a power supply circuit for supplying power to the power protection circuit and the RS485 communication circuit module interface according to an embodiment;

FIG. 3 is a circuit diagram of a power supply module and a standby power supply circuit module provided in the first embodiment;

FIG. 4 is a circuit diagram of a current detection circuit module according to an embodiment;

FIG. 5 is a circuit diagram of a power down detection circuit block according to an embodiment;

FIG. 6 is a circuit diagram of a micro-control processing module according to an embodiment;

FIG. 7 is a circuit diagram of a memory module according to an embodiment;

FIG. 8 is a circuit diagram of an RS485 communication circuit module according to an embodiment;

FIG. 9 is a circuit diagram of an IR receiving circuit module according to an embodiment;

FIG. 10 is a circuit diagram of an LED indicating circuit module according to an embodiment;

Fig. 11 is an NB-IoT wireless communication module interface circuit diagram provided in a first embodiment;

fig. 12 is a circuit diagram of NB-IoT wireless communication module interface conversion provided in the first embodiment;

Fig. 13 is a configuration network system recording and alarm structure diagram with a residual current detection function based on NB-IoT according to an embodiment.

Detailed Description

the embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

The invention aims to provide an NB-IoT-based network distribution system with a residual current detection function and a terminal aiming at the defects of the prior art.