| In recent years,with the rapid development of the economy and the huge population base,the consumption of electrical energy has also increased day by day.As a large power-consuming country,transmission system support is particularly important.The premise of transmission system support is to ensure the stable operation of the transmission line consisting of transmission towers.Only in this way can the impact on the transmission efficiency and of the grid be reduced.At present,the management of transmission tower tilting in the power grid is still under regular inspection by the operation and maintenance personnel.Because transmission towers are generally located in mountains,rivers and other complex geological environments.Just relying on line inspectors to conduct regular inspections will waste a lot of manpower and resources.At present,the existing monitoring systems still have deficiencies in data transmission,accurate parameters,and transmission distance.Based on this premise background,and drawing on the existing complete set of online monitoring devices for transmission equipment,a STM32-based control core and MPU6050 as the tilt sensor are designed to transmit data through Lo Ra multi-node networking and finally through NB-Io T Upload the tilt parameters of each subnode to the online real-time monitoring system of the cloud platform.Each subnode contains a tilt sensor MPU6050 and a remote wireless communication Lo Ra module.Among them,MPU6050 has high sensitivity,stable operation and accurate data.Lo Ra wireless technology has a long communication distance,and can communicate with each other according to a specific ISM band.Moreover,the transmission rate is fast,and the anti-interference ability is strong,and the tilt information of the transmission tower can be transmitted in real time.The main node contains an NB-Io T module.The NB-Io T technology has a wide coverage,high service quality,and multiple support connections.It can upload tilt information to the cloud platform quickly and in real time.In addition,both NB-Io T technology and Lo Ra wireless technology are low-power wide-area networks and require lower power.And the system is powered by solar and lithium batteries,which can greatly reduce operating costs.After waiting for the system to upload data,the staff of the power department can schedule targeted condition maintenance on the transmission pole tower with hidden troubles according to the analysis results such as charts,text,and waveforms provided by the transmission tower monitoring system.The main work of this design is as follows:(1)Solar panel power supply system.In this experiment,the power supply system of each node consists of a solar panel,a solar controller,and a lithium battery.During the day,it is powered by a solar panel while charging the lithium battery.At night,it is powered by a lithium battery.This makes it possible to make full use of solar energy and achieve self-sufficiency in electrical energy.(2)Subnode information collection system.There are two subnodes in this experiment.The corresponding software design is completed on the basis of the hardware platform,which can realize the functions of data collection,processing,and wireless transmission.The subnode can send the data collected by the subnode to the main node through Lo Ra multi-hop networking technology.(3)Main node information collection system.There is one main node in this experiment.The software design is also completed on the basis of the hardware platform.The data of the subnodes is received and processed through Lo Ra multi-hop networking technology,and then the received subnode data and the data collected by itself are uploaded to the cloud platform through NB-Io T technology of real time monitoring.(4)Cloud platform display.Log in to the cloud platform account and set the relevant protocols so that it can complete online monitoring.The cloud platform has functions such as large screen monitoring,alarm trigger notification,and historical data query.The alarm trigger notification can be notified through We Chat,SMS and email.(5)Low power consumption design.The Lo Ra and NB-Io T wireless network technologies used in this experiment are both low-power WAN technologies,and the battery life reaches more than 10 years.At the same time,the software design in this experiment enables the system to achieve "long standby + short time work" to achieve the purpose of low power consumption and long-term operation. |
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