| With the continuous improvement of China’s economic strength,higher requirements have been placed on the development of grid technology,and the development of smart grid technology has become particularly urgent.Online power flow calculation has become a current research hotspot,and intelligent dispatching is a key part of the smart grid,and the realization of smart section limits is of great significance.PSASP software is a common offline manual calculation software.It cannot implement batch load flow calculation and has a large calculation workload.As the scale of the power grid continues to expand and the power grid model becomes more and more complex,the manual calculation method cannot meet the current technical development requirements of the power grid.In order to solve this problem,this paper studies an online calculation method based on MATPOWER software to replace PSASP software to achieve online power flow calculation and intelligent thermal stable section limit calculation.This article first explains the principle of the D5000 system platform importing the online operation data of the SCADA system into the PSASP software basic database,providing the prerequisites for online operation data of the online power flow calculation,and details the database structure and export method of the PSASP software.Then introduce the data file structure of MATPOWER software,compare PSASP software database with MATPOWER software database structure,find the database conversion rules,convert the PSASP database to MATPOWER data input file through MATLAB programming,and simulate through IEEE9 node system.Database files and load flow calculation results before and after conversion verify the correctness of database conversion principle and the conversion program.Finally,on the basis of MATPOWER online power flow calculation,further research on the realization method of intelligent thermal stable section limit,the basic concept of sensitivity and calculation principle are introduced,and the principle and algorithm of intelligent thermal stable section limit in MATPOWER software are given.The algorithm is implemented based on MATLAB programming,and simulation calculation is performed through IEEE39 node system to verify the correctness and superiority of the intelligent thermal stable limit calculation program.This paper provides certain ideas and solutions for online power flow calculation and intelligent thermal stability section limit calculation,which has good practical significance and engineering reference value. |
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