The Design And Research Of New Type Of Relay Protection Equipments Of Multifunctional Microprocessor Relay Protection Experimental Training System

With the rapid development of the Electric Power Industry in our country, new type of relay protection equipments especially microprocessor relay protection equipments have been widely applied in Power System, which has a higher and newer requirement to the corresponding relay testing technology. The deeper studying for microcomputer protection device interfacing with electronic transducers, the more needs of providing for more digit testing signal and the accuracy or stabilization of simulation testing signal. The intelligent development of microprocessor relay protection especially adopted sophisticated technology of data communication technology and computer automatic testing put forward new development of relay protection testing technology and provide new method and new means and bring a possibility for the automatic close-loop testing of relay protection.First, this thesis describes the structure and working principle of the"multifunction microprocessor relay protection and substation integrated automation experimental training system". New type of relay protection testing equipment based on the double DSP+CPLD technology, meeting the case of project sites, is developed. And the microprocessor is one important part of the"multifunction microprocessor relay protection and substation integrated automation experimental training system".To meet the various experimental testing requirements the"multifunctional microprocessor relay protection and substation integrated automation experimental training equipment". On the other hand, the microprocessor relay protection testing equipment can also be an independent equipment to meet the common relay testing requirement of Power System, which has a great applicative potential and practical value.In the paper, the principle and the function of the whole hardware modular are analyzed in detail, a high accuracy signal generator control modular and man machine interface module are brought forward and designed. A set of power amplificatory circuits designing and the corresponding protective circuits designing of which is brought forward. the designing rule and the programming method of the system program of signal generator DSP modular are studied and analyzed, an effective communication protocol is designed, DSP/BIOS is a kind of real-time operation system, the software is designed on the platform of DSP/BIOS, which is specially designed for improving the real-time performance of the MMI module. The algorithm of stability and instability signal generator are studied, in the paper, the basic conception of IEC60870-5-103 protocol is introduced, and application of the automatic close-loop testing system of microcomputer relay protection device is discussed, uses the condition character inquiry bit to realize control of application flow.The testing signal of the electronic transducers interface output simulation or digit signal, in the thesis high accuracy serial DA converter and the 10M Ethernet control chip CS8900A is used to accomplish the Ethernet interface. The design is proved to possess function of outputting simulation or digit testing signal.The whole software and hardware adopted the modular design, which had strong storing and operating ability, Anti-interference, self-checking and self-adapting abilities were raised through processing software and hardware, The results of the simulation and the real debugging experiment indicate that this device can not only meet various experimental demands of"the microprocessor relay protection and substation integrated automation experimental training equipment", but also meet the testing requirements of power system relay protection testing in the project site.