Research On Management And Analysis System For General Transformer Relay Protection

With the development of computer technology, microcomputer transformer protection has changed from special protection to general protection. To meet the different demands; reducing the development or maintenance costs; and improving the protection device's reliability and safety, the general transformer protection is designed with maximal principle. User can configure protection function, analog channels and digital input/output channels as required. In respect that the general transformer protection has a complex structure, people must pay more attention on its monitoring and test, so research on an excellent management and analysis system for the general transformer protection is very important.This paper firstly recalled the history and application status of transformer protection, and discussed the existing main problems; introduced the basic structure, the hardware configuration and the software operation process of the general transformer protection device; presented the total design proposal of the management and analysis system.Protection management software is the core of the management and analysis system. It controls the man-machine interface and responds the communication between the protection device and the system. According to the application requirements of the software, this thesis introduced the achievement of each function, and explained the major problems in the programming.Fault record and analysis software, which provides perfect waveform reproduction and protection fault analysis, is an important component of the management and analysis system. In this paper, we introduced the structure of the document used in the software, the running process of the software, the achievement of the functions and the solutions of the key problems.One of the problems in the achievement of the management and analysis system is the communications. The system connects to the serial port of the protection device, and uses Modbus Protocol to complete all data transmission. This paper discussed the programming method of serial port, analyzed the structure of Modbus protocol, and introduced the achievement of the communication.The management and analysis system had passed the static tests. The results showed that the general performance of the system has met the design requirement. The main test content and result had been produced in this paper.