Integration Of Optical Digital And Analog Relay Protection Testing Device

Accompanied by the rapid development of the power system of the power system reliability requirements more and more high. In recent years, at home and abroad there are several serious accidents of electric power. These serious accidents have caused serious economic losses. These accidents have exposed the vulnerability of power system too. So how to improve the ability of power system protection and control in power system is increasingly complex, to minimize the probability of accidents become the important things.Relay protection testing device is developed according to the state promulgated the "microcomputer relay protection test device technical conditions" standard of relay protection device simulation, testing instrument. The accuracy of relay protection testing device performance, simulation results will directly affect the safety of the relay protection equipment. With the rapid development of the power industry of our country and the relay protection technology continues to improve, the user is also put forward higher requirements for relay protection tester.The research content of this thesis is based on "science and technology cooperation projects of digital relay protection tester and DSP system software of open". The main contents of this thesis are as follows:(1)By reading a lot of literature and the actual operation to analyse the current situation of the development of relay protection tester and master of digital relay protection tester and simulation of relay protection testing device’s working principle and characteristics. Interpret the importance of integration of optical digital and analog relay protection testing device.(2)Building the transmission line simulation model used in relay protection tester by the simulation software EMTP, studying on the output file, and writing a program that generates the file automatically transformed into the standard COMTRADE format output to realize a real-time complex fault simulation module based on EMTP used by relay protection testing device.(3)The core of digital signal processing system of relay protection testing instrument for lower machine is DSP module. This thesis through the research on relay protection tester on the performance requirements of DSP module and comparison of the 55 and 28 series DSP performance of selecting the best DSP suitable for the integration relay protection tester. And select the FPGA chip and the network chip for the integration relay protection tester. Design the external structure of DSP. And verify the DSP whether meet the requirements.(4)Through the research on relay protection tester analog amplifier module of realization an improved power amplifier module which used in relay protection tester. Simulate actual effect of the amplifier circuit. According to the circuit design, select main components in the circuit model. The power amplifier achieves a reduction in capacity, reduce the volume, save cost and improve efficiency.