基于NICRIO平台的智能变电站线路保护模拟装置设计
毕业论文关键词 ： 线路保护；智能变电站；labview; NI CRIO
Title Design of Line Protection Simulative Device for Intelligent Substation Based on CRIO Platform
Abstract Line protection is an important component part of the safe and stable operation of electric power system. The relay protection is one of the most important secondary equipments to insure the safety and stability of the power system. The basic task of the relay protection is that it cuts off the fault elements quickly and selectively in the power system. So that it can ensure the fault components protected and no other fault section quickly returned to normal operation. The relay protection also can show abnormal running state of electric power system, and trip the circuit breakers or send signals. So the effect of relay protection in power system operation is very important. Digitization of data acquisition, information exchange network is the main character for the secondary equipment of intelligent substation. Compared with conventional substation, the improvement of intelligent substation secondary circuit is significant, and is a principle nature. So that, we need design substation protection devices for the intelligent substation, as the traditional protection device data transfer mode is broken with the face of new secondary circuit. Compact RIO is an embedded control and data acquisition hardware platform. It provides the high performance, high reliability and the flexibility of custom for industrial and embedded control applications. Compact RIO embedded system consists of PowerPC processor, and 10/100M interfaces such as network port, serial port, USB port and so on. So that distributed system can be realized easily. The built-in Labview which can be used to create multi-threaded embedded system has more than 1000 kinds of functions. It has real-time control, analysis, data recording and communication function. This paper analyzes the basic principle of the transmission line protection, focus on the analysis of the current differential protection and distance protection. Based on NI CRIO platform and using NI CRIO platform to do hardware analysis. Based on current differential and distance protection, this paper analyzes the basic principle of the transmission line protection. Based on NI CRIO platform we use NI CRIO platform to do hardware analysis and then collected and analyze the running information of the transmission line. Then we use the idea of modular design and the software named Labview to design the program of electric transmission line protector analog device to simulating the basic functions of electric transmission line protector of intelligent substation. We then realize the functions of the longitudinal differential current protection, distance protection, auto reclosing, TV disconnection alarm, power swing blocking and soon. At last, we simple detected the basic logic functions of the simulator.
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