Research On Key Issues Of Distributed Generation Connected To Zhuji Power System

In recent years, with the national attention on energy conservation, air pollution control, etc., encouraging policies related to distributed generation projects are being introduced, more and more companies and individuals have begun to invest in the construction of distributed generation projects and propose grid-connecting needs, which are mostly in the form of self-generation, self-occupied, and the balance of access based. At the same time, for the county power grid, the main grid is in grow, but part of the distribution lines are still weak, and distributed generation projects get access to the grid through 10kV line and 380 /220V in majority, with its penetration continuing to improve, due to its low energy density, poor stability characteristics, there will be a profound impact on the distribution network.This paper firstly introduces the type, generation principle, and output characteristics of distributed generations connected to Zhuji power grid, sorts out relevant technical specifications and key index factors for distributed generations. Then, in consideration of the actual situation in Zhuji grid, researches on the major influence of distributed generations, including photovoltaic, cogeneration and other forms, mainly in the power flow calculation, power quality, protection, recovery, etc., in this process, elaborates changes before and after the connection, uses professional software to carry out simulation calculations besides theoretical deduction. Then analyzes on examples of distributed generations connected to Zhuji power system,verifies the practicality of the theoretical analysis results, and brings out the corresponding improvements.