Research And Development Of Microprocessor-based Protection And Substation Integrated Automation Experimental System Hardware

From the last century ninetieth, microprocessor relay protection technology has been rapidly developed and widely used in our country. It has become an inevitably flow and trend in the development of relay protection technology. But there are scarce experimental devices of microprocessor relay protection at present in our country and the devices which are being used have the defect of function single, inconvenient, and high cost etc. Based on this condition, an experimental and training system for the multifunctional microprocessor relay protection and substation integrated automation is explored and developed in this paper.A new experimental and training system with modular hardware and software is introduced in this paper based on the research and analysis of the principle, structure and realizing method of microprocessor relay protection and safety automation equipment and the constitutes of cut-up arrangement substation integrated automation at home and abroad whose function includes relay protection experiment, such as current protection, distance protection and so on, and substation integrated automation experiment etc. The structure and function of the experimental and training system are introduced in detail, the principle and function of the hardware section are analyzed, and the method of software designing and programming is concisely set forward. In this paper, a new communication mode between computer and the RS-485 bus and the CAN bus by using the computer's EPP port and an effective method of software's remote downloading are brought forward. The experimental result of the system has shown that the correct performance rate of relay protection is 100%, the performance of safety automation equipment is normal, and the communication system satisfied the demand of data transmission.The experimental and training system for the multifunction microprocessor relay protection and substation integrated automation has the characteristics of widely application, perfect function, reliable performance and advanced technology etc, which has filled the blank of experimental device of microprocessor relay protection in our country, deserving to spread it to the college of electric power and to power system.