Design Of 6MWp Photovoltaic Power Station Connected To The Grid Access System

Along with the continuous development of the global economic and social, energy consumption is also the corresponding sustained growth. Therefore, the large-scale Development and utilization of renewable and Sustainable energy has been an important part of the energy strategy in the future. Solar photovoltaic power generation is one of the most rapidly developing countries in recent years, and it is also one of the most economic potential energy. However, the solar photovoltaic power generation system has a great difference with the traditional thermal power generation and water power generation. In particular, the impact of the power grid security and stability has its special characteristics. As a decentralized power generation system, grid connected solar photovoltaic power generation system will have some adverse effects on the traditional centralized power supply system.This paper is the author of the Dalian Ding to participate in the design work of the 6MWp grid connected system design work. First, this thesis introduces the practical value and developing process of solar photovoltaic power generation, photovoltaic power grid technology and grid access system equipment selection are discussed, and gives the photovoltaic grid connected power station access system design ideas and methods. Then, node combined actual situation of Dalian Ding to new energy development Co., Ltd. "golden sun" project photovoltaic 6MWp demonstration project, for the project scheme of access system, the main research work is as follows.According to the power demand of photovoltaic power generation system, the technical requirements of photovoltaic power station are put forward, and the factors such as the capacity and the capacity of the PV power station are considered.In the design of communication system, the relationship of scheduling management is defined, and the communication scheme is put forward through the analysis of channel requirements.In the electrical system design, for the power flow calculation, short-circuit current, electric energy quality analysis, reactive power balance, three-phase unbalance check electrical problems such as the detailed elaboration, completed the substation retrofit design, for dispatching automation system to further define the power quality online monitoring and scheduling management, system remote configuration, remote information acquisition, channel organization and secondary safety door, electric.In the distribution system design, the power distribution system design, power distribution system design and power distribution system design, reasonable selection of the number of lines, wire cross section, a clear reactive power allocation, and the main wiring of the booster station, equipment parameters selection.