Distributed Photovoltaic Remote Monitoring System Design And Implementation

The photovoltaic power station is divided into centralized photovoltaic power station and distributed photovoltaic power station.With the support of relevant national policies,the number of photovoltaic power stations,especially small distributed photovoltaic power stations,has gradually increased.Centralized power stations generally have their own monitoring system,but for small distributed photovoltaic power station,most devices lack of a unified,real-time,effective and suited to the characteristics of the distributed photovoltaic power station operation monitoringsystem.Therefore,the operation efficiency,economic benefit and maintenance cost of distributed photovoltaic power station cannot be compared with large centralized photovoltaic power station.In order to solve the above problems,this paper proposes a unified monitoring platform solution based on cloud server,Modbus TCP/IP protocol and B/S mode.This paper describes the data transmission process and basic principle of photovoltaic power station.First,the power equipment,such as the photovoltaic inverter,sends the relevant data message to GPRS DTU or gateway through the communication port,and then sends it to the designated cloud server by the GPRS DTU or gateway.The server then parses the data packets and stores the data into the database to complete the persistence.At the same time,the browser client initiates the request to the server through the relevant protocol,and completes the operation data acquisition and system business management of the device.In order to achieve the above functions,this paper designs and realizes the browser client under B/S mode,pro'vide a good human-computer interaction experience,equipment data real-time,convenient and comprehensive display.At the same time,the server RESTful API interface is implemented.The interface is designed with the Spring Boot framework to enable the client to complete the query of login authentication,historical data,and fault data,and to manage the system.Finally,we design and implement WebSocket and TCP server based on Netty framework.The server completes the protocol parsing,data preservation and client data forwarding under high concurrency and high reliability.The function and performance test of the system is carried out at the end of the paper.The test results show that the system's functional requirements are realized and the performance meets the design requirements.