Intelligent wind power plant SCADA system in encrypted Profinet communication mode

Abstract

The invention discloses an intelligent wind power plant SCADA system in an encrypted Profinet communication mode. The system comprises an on-site monitoring system for fans, a central monitoring system for wind power plants and a remote Internet monitoring system. According to the system, an architecture development mode combining B/S and C/S is adopted and is different from a traditional single B/S or C/S architecture mode, and the problem of poor system architecture adaptability is effectively solved. An isochronous synchronization mechanism is adopted in Profinet industrial Ethernet communication, in a multi-cycle transmission process, RT and IRT communication characteristics are flexibly used, network resources are fully utilized, a network structure is optimized, and the real-time characteristic of the traditional Ethernet is further improved. A DES algorithm is adopted for encryption in the process of sending data to an upper PC receiver by a bottom-layer PLC transmitter, and the system safely transmits real-time data. A matching mode in a database server is utilized to determine whether or not the transmission data of a lower computer is received, and the reliability of the system is enhanced.

Description

technical field [0001] The invention relates to an intelligent wind farm SCADA real-time control system, in particular to an intelligent wind farm SCADA system in an encrypted Profinet communication mode. Background technique [0002] Due to the harsh working environment of wind turbines, which have been operating for many years without the participation of management personnel, real-time and reliable monitoring is very important. Especially for large-scale wind power plants, dozens or even hundreds of wind turbines are usually required for cluster control. The traditional SCADA control system of wind farms can no longer meet the needs of industrial monitoring, and it has the following problems. [0003] 1) Poor system security and reliability [0004] In the process of industrial production, the network security of industrial control systems is an important factor that developers must consider in the design process. Industrial networks are vulnerable to security threats su...

AI Technical Summary

Problems solved by technology

The data transmission protocol may be cracked by intruders, causing the data stored in the server to be leaked or even destroyed, which seriously threatens the security and reliability of the power system, directly affects people's production development and daily life, and causes heavy property losses

Moreover, there are a large number of wind turbines in the wind farm, and a large number of PLC controllers are required. If the distribution is disorderly, it will not only affect the expansion of the power equipment of the wind farm in the later stage, but also cause confusion in the process of collecting and uploading data, resulting in data storage errors. , affecting the real-time monitoring of on-site fans

[0005] 2) The real-time performance of the system is poor

Especially once a failure occurs, even for a few seconds, it may lead to the stop of the entire production, and even cause equipment and personal safety accidents.

On the other hand, the traditional Ethernet adopts the CSMA / CD mode. When the network load is too large, the uncertainty of the transmission process is difficult to meet the real-time requirements of the industrial control system. real-time requirements

[0007] 3) Poor system architecture adaptability

[0008] The C / S structure model cannot meet the needs of remote users for local center monitoring, poor compatibility, difficult transplantation, and high development costs. If the hardware is upgraded, the software will also be upgraded accordingly, which increases the development and maintenance costs of the system.

The B / S structure mode reduces the response speed of the client page due to the delay of network transmission, making the monitoring speed of a single remote monitoring slower

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