Research On Distribution Network Planning And Assessment Based On International Standards

Distribution network is used to supply power to all users. A power distribution network which is reasonable could not only enhance the reliability of power supply, but also save a massive of investment expenses. The distribution network in China has to face the problem that it needs to find a way to match with the world international standard after Chinese economic reform. Therefore it is quite necessary to study the appraisal of distribution network improving based on international standard.Firstly, this paper introduces the international standard briefly. It has analyzed the situation of current distribution network standard and explained the goal and development direction of the research of international standard. Transformation of the distribution network should meet the requirements of current economic and security and focus on the future. It should lay the foundation for the construction of smart grid in the framework of international standards.Secondly, this paper discusses the assessment of the distribution network transformation standard selection in-depth. By introducing the relevant international standards and combining with the existing national standards, this paper gives a detailed exposition of the situation on the domestic research and gives the relevant standards of upgrading distribution network. On this basis, this paper analyses the distribution system reliability and economy indices, quality of distribution network indices, distribution network capacity assessment indices, the level of short circuit current evaluation grid, distribution network economic evaluation indices, comprehensive evaluation indices. And it introduces a practical software of comprehensive evaluation of the reliability and economy, gives the methods of distribution network reliability comprehensive assessment.Finally, combining with Chinese basic national conditions and distribution network based on international standards, this paper gives the process of assessment of transformation of distribution network and demonstrates the possibility of its implementation.