| With the development of our national economy and the continuous improvement of people’s material and cultural level, the user’s dependence for electric power is greater and greater, which prompted the rapid development of electric power industry and the constant expansion of power grid. The users have a higher and higher requirement to the quality and reliability of power supply and even cannot stand the instantaneous terminal of the power. At present, above95%of power failure is caused by the distribution network. Among them more than70%was caused by the MV power distribution network, which mainly uses feeder automation (FA) technology to realize fault self-recovery. It just goes to show that the traditional distribution technologies and management tools have been unable to adapt to the new situation.The feeder automation is the foundation in the distribution automation system. The feeder automation we have considered so far refers to the medium and high pressure feeder automation, especially refers to the medium pressure feeder automation. In our country, it especially refers to10KV feeders. Although the fault segment time has been greatly reduced, general FA technology still does not meet the requirements due to its reliance on the primary station for fault location, isolation and restoration. Fault self-recovery needs more speed. In addition, the existing FA does not reliably detect single phase grounding fault. Therefore, intelligent power distribution system development will be within the next few decades the world’s focus and quick heal technology. Fault self-recovery technology is indispensable and important component of intelligent power distribution system with rapid healing ability to timely finding and eliminating hidden fault of distribution network and after the failure of corrective action to avoid or reduce the impact of failures on the user. Therefore, establishment of a reliable, economical, practical, intelligent power distribution system of healing is an inevitable trend in the development of power system automation technology.Intelligent power distribution network is a systematic project, is the distribution of new technologies and information integration, integration of new technologies for organic, revolutionary changes in system performance. Intelligent power distribution network is a smart grid network of connections in the main and important part of the power supply-oriented. As a smart distribution grid "immune system", self-healing is the most important characteristic of intelligent power distribution, which allow the distribution network to automatically detect faults and corrective actions, minimize the scope blackout and outage time, thereby reduce the loss of users. Study on distribution network fault self-recovery technology, for improving power supply reliability of distribution network, promoting the construction of intelligent distribution network has very important significance.Combining the development of intelligent power distribution and aiming at the study of10kV aerial rings to county town, the project points out the problems still existing in the distribution network. Based on pilot protection line sections thought of control technique for rapid fault self-recovery, the research first for10kV aerial rings puts forward a scheme for fast fault self-recovery control. Fault location, fault isolation and restoration of non-fault zones are described in detail on the programme, whose application is also illustrated. And then by using GPRS wireless communication in communication networks as the main framework, while maintaining the reliability, it solved the problem of using optical Ethernet investment cost is too great. Finally it gives a detailed introduction on Terminal scheme of fault self-recovery system and main station system and describes their process and part of the configuration of hardware and software respectively. |
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