Research On Grid Connected Access Scheme Of Distributed Power Supply In Langfang

Distributed photovoltaic power generation is a new green and pollution-free energy.At present,there are no barriers to maturity of photovoltaic power generation technology,mainly divided into two types of power generation mode,which are grid connected and off network.Grid connected PV is incorporated into the distribution network through private lines or public lines,which will have a great impact on the direction and management mode of the distribution network.Because of the access mode,the access position,the access voltage level,the access capacity,the protection configuration,the configuration and monitoring technology of the security automatic device and the intelligent dispatching of the distribution network,the distributed photovoltaic power generation project is not mature.Therefore,it is significant to study the scheme of integrating distributed PV power into distribution network.Based on the analysis of the current situation and technical principles of grid connected photovoltaic power generation,this paper makes a thorough research on the actual situation of photovoltaic power generation in Langfang from the following aspects.First of all,the basic principle and mathematical model of distributed photovoltaic power generation are expounded,and the simulation model is established to calculate and analyze the output characteristics of photovoltaic cells.Secondly,the influence of distributed PV grid connected to power balance,economic operation,power quality and distribution network planning is analyzed,and the corresponding countermeasures are put forward in the technical and management level.In view of the actual application situation,we focus on the distributed photovoltaic power access mode,distribution network planning and management mode.Finally,through the investigation and analysis of the current operation and construction of the photovoltaic power projects in Langfang,this paper studies the access mode of the distributed grid connected with the distributed photovoltaic projects in Langfang,and analyzes its application scope,characteristics,mode,and the difficulties and coping strategies in the actual access points.