| Power system comprehensive load modeling is one of the basic research topic in the field of power system analysis,Measurement-based approach is one of the most basic and important load modeling methods.In Measurement-based approach, acquisition of a large number of measured data samples is a very important basic work. In the past,data acquisition mainly in the load nodes are equipped with load characteristics of the data recording device for field data collection. But in reality,the installation of load recording device required is difficult to spread,field measurements is more complex and economic cost is too high,seriously hampered the development and engineering applications of Measurement-based modeling. This article that makes a lot of power available fault recorder data as the measured data samples into measurement-based method modeling,provides an important data sources for load modeling work.The main content of this paper is the research and development of the pretreatment platform of fault recorder data.The points of this article focus following three aspects:firstly,according to the direction that makes the fault recorder data as the measured data samples into Measurement-based modeling,this paper studies the characteristics of the fault recorder and based on COMTRADE standard fault recorder data source files,discusses the feasibility and advantages of using the fault recorder data in modeling,analysises the problems of using them to model and the need for pretreatment,thus clears the data pre-processing tasks and goals.Secondly,regarding the data sample requirements of measurement-based modeling,this paper presents a set of method that will preprocess standard data file of the COMTRADE to make it available for modeling. This method is the integration of four sub-modules of aggregation operations,filtering,frequency standardization and positive sequence fundamental transform operation,which respectively use mutation theory,interpolation, least squares fitting algorithm,Fourier transform theory and method of symmetrical components to achieve the data processing.In the article,to a fault recording measured data as an example,the data waveform that obtained by the preprocessing of this data file proves the feasibility and effectiveness of this pretreatment method.Thirdly,based on the principles and processes of pretreatment method,the author proposes the construction plans for processing the fault recorder data that based on COMTRDADE standards,designs and develops a set of pretreatment platform of fault recorder data.This platform consists of pre-processing module and the query management module,takes the database as a support,puts the pretreatment method into engineering practice,realizes the anticipated targets of processing the fault recorder data to become the available data for Measurement-based modeling,thus provides a solid data assurance for the development of Measurement-based method and its popularity in engineering applications.Whole pretreatment platform is based on modularized design idea and relies on the pretreatment method constituted by many kinds of mature data analysis principle.In the process of realization,the platform is finished by VC++ which is object oriented industrial grade compiling software and ADO database operation technology.Meanwhile Access and SQL Server are used to construct bottom database.Platform design is to the principle of enhancing the level of workflow automation and operational efficiency,to the purpose of practical engineering,applied pretreatment method to engineering high-performance.The platform has a lot of advantages such as rational structure,flexible application,simple operation and fully functional.Currently,the pretreatment platform has been achieved.Through experimental running debugging,it comes out that it performs stably and is practical.Works of this paper built a stable data supporting system for Measurement-based load modeling. |
