Research On Optimizing Distributed Energy For Shaoguan Distribution Network

Distributed energy sources such as solar photovoltaic power generation,wind power generation,and hydropower generation are recognized as ideal alternative energy sources due to their environmental protection and renewable characteristics.Solar photovoltaic power generation is the direct use of the photovoltaic effect of the semiconductor interface to convert solar energy into electrical energy.Hydroelectric power is to transfer the potential energy from a high place to a low place,convert the potential energy contained therein into the kinetic energy of the turbine,and promote the generator to generate electric energy.Wind power uses a wind blade to drive a generator to convert the kinetic energy of the wind into mechanical kinetic energy,and then convert the mechanical energy into electrical energy.In recent years,with the continuous maturity of technology,the cost of the above-mentioned distributed energy power generation has been effectively reduced,and has significant social and economic benefits compared with the traditional ener gy generation method.Combined with the country’s important strategy to further improve the environment,distributed energy access has been rapidly promoted in the mountainous areas of northern Guangdong,and the power generation has increased significantl y,which has a huge impact on the distribution network in northern Guangdong.Distributed energy itself has the characteristics of wide distribution,low single-point energy density,and intermittent power generation.If the traditional "separation of pow er and supply" management method is forced,requiring separate construction of distributed power generation and transmission networks,it will greatly increase investment Cost is not economical.Therefore,the state encourages grid companies to digest dist ributed energy sources on-site,and prohibits "abandoning light," "abandoning wind," and "abandoning water." In this context,over the past five years,a large number of distributed energy sources have emerged and connected to the distribution network,mak ing the control and management of the distribution network more and more complicated.Compared with traditional distribution networks,distributed energy has brought many adverse effects in terms of power quality and grid stability.As the proportion of ne w energy sources in the power grid increases,the degree of interaction between new energy generation and power systems continues to deepen,and the scope of influence continues to expand,that is,from simple local voltage fluctuations,harmonic pollution and other power quality issues to Security and stability of the entire network and economic operation.Therefore,this paper mainly analyzes the typical cases of Shaoguan Power Supply Bureau in the mountainous areas of northern Guangdong,analyzes the imp act of distributed energy on grid stability,and finds the main reasons for limiting the capacity and scale of distributed energy generation.Then,study the theoretical derivation process of the main planning technical indicators,and propose reasonable planning principles and system access plans to improve the grid’s ability to accept distributed energy.This paper analyzes the influence of distributed energy generation on distribution network,including voltage,network loss,harmonic,power flow,power transmission,voltage distribution,three-phase unbalance,short-circuit current and network reliability.Optimize and adjust the power grid structure,reduce the risk of power grid system operation,reduce power grid losses,and improve the economic benefits of distribution network.