Research And Programming Of Power Flow Calculation In Distribution Network

The distribution network is at the end of the power system.As an important part of the power grid,it directly faces the end users and affects the reliability and quality of the power supply.According to its voltage level,it can be divided into high-voltage distribution network,medium-voltage distribution network and low-voltage distribution network.Power flow calculation of distribution network is an important part of analyzing and studying distribution network.It is an important premise for the rationality and reliability quantitative analysis of the planning and design and operation of the distribution network.It is the basis for the safety analysis and optimization of power systems.The paper discusses the power flow calculation of the distribution network.Based on the principles and basis of the forward algorithm,Newton-Raphson method,loop impedance method,and Zbus Gauss method,the advantages and disadvantages of different algorithms are analyzed.Based on breadth-first search,the forward pushback method is used in this paper.Based on breadth-first search,the node number is optimized,and the forward pushback method is used to calculate the power flow..Due to the distributed generation access to the distribution network,the operation mode and structure of the distribution network have changed,and new node types have appeared in the system.The traditional power flow analysis method is no longer applicable.The paper analyzes the distribution network access to distributed generation,considers the distributed generation as negative loads,and establishes corresponding models based on different types of distributed generations.The relevant improved power flow calculation algorithms are used to perform the power flow calculations.Impact of the system when connected to different types of distributed generations.