Analysis And Research On The Typical Engineering And Optimization Of Distributed Photovoltaic Power Integrated To The Distribution Network

The wide spread use of Distributed photovoltaic power supply is the most important way of boosting application of the renewable solar energy. As the PV power industry and inverter manufacturing technique develop and improve rapidly, photovoltaic power is widely applied to the power system because of its high reliability and pertinence.Based on the comprehensive consideration of interaction between PV power contribution characteristic and distribution grid operation, these are the key technology to be spreaded as to formulate grid plan scientifically, and guide distributed photovoltaic power supply integrated to the distribution grid orderly and under control.This paper firstly conducted the analysis and research on the characteristics of PV power integrated to the grid, interaction between the PV and distribution grid after integration. Under the above basis, the paper puts forward the typical grid design scheme for distributed PV power, and confirms classification of photovoltaic (PV)system, voltage grade of interconnection, penetration level, requirements of PV Point of Interconnection (POI) and Point of Common Coupling (PCC), requirements of distribution equipment selection, automatic protection and safety device, communication and monitoring as well as electric energy measurement. In order to satisfy the requirements of integration of abundant distributed PV power and raising the usage efficiency of P V power, this paper conducted a lot of comprehensive benefit analysis on the perspective of programming, analysis on the influence to the reliability to the distribution grid as the energy permeability rising, and concluded the technical standards and management requirements of grid-connected PV power station. The establishment of typical design for integration of distributed PV power to distribution grid has theoretical and practical importance for popularizing the huge integration of distributed PV power, and strongly guided the engineering, reviewing operating, and maintenanceThe paper supplied several ways of optimizing the integration of distributed PV power to distribution grid, as reducing the influence of lowest load to energy permeability limit, and influence of load transfer to energy permeability limit, analyzed the reliability of integrating the distributed PV power to distributed grid by RAMSES software. By study the energy permeability, to get the acceptance capacity of distribution grid, which was important to optimizing the connecting way, improving the measures. The paper analyzed social benefits, environmental interconnection of aspects of benefits and economic benefits of distributed photovoltaic power integration to the distribution grid.In the end, the paper simply narrates direction of further study of integration of distributed PV power to the distributed grid.