Study On CIM Of Active Distribution Network

To accomodate the climate change and energy cirisis,most of the large countryhas launched their own smart grid development plan.As an important part of smartgrid,smart distribution grid is a combination of the electric powerengineering,advanced sensor and automatic control,the modern computer andcommunication techniques,which is to accomondate distributed generation interationand realization of self-healing.There are large number of information managementand control systems which are developed by different vendors.Due to the absence ofinformation model and interface standards,these systems cannot share informationand incorperate into each other.IEC57Technical Committee developed IEC61970and IEC61968standard forEMS and DMS respectively.Among them,IEC61970-301and IEC61968-11definedCIM(common information model)which describes the power system resources forinformation management,modelling and other applications. At present,IEC61970hasbeen mature and widely used in the real practice, but IEC61968need moreenhancement to be used in reality.Because there are much more equipment types indistribution network,while new equipments and control systems are addedcontinuously to accomondate new challenges,so CIM of distribution system needs tobe expanded successively.Based on the current standards,to we meet the requirement of the power flowcalculation,unit commitment and economic dispatching,time domain simulation andother applications.There is a more complete expansion for distribution network andthree-phase model,Distributed power generation and energy storage equipment modelhave been proposed in this paper. Meanwhile,a standard test system of activedistribution grid is designed in this paper for reference.And,the CIM/XML export andimport tools have been developed to verify the extended CIM model and IEEE123 node system and have been used to prove the expanded model feasible.