Method for simplifying passive electromagnetic transient-state simulation model of large-scale power distribution network

Abstract

A method for simplifying a passive electromagnetic transient-state simulation model of the large-scale power distribution network includes steps of dividing a large-scale intelligent power distribution system into an external system and a research system which are connected; respectively establishing an electromagnetic transient-state simulation model of the external system and the research system; setting a low-dimension system model order q; calculating A=-G<-1>C, R=G<-1>B according to a state-output equation model of the external system; selecting a corresponding basis calculating method according to the number of input quantity of the external system, solving a standard orthogonal basis V of Kq(A, R, q) of a krylov subspace of the q dimension; calculating Cq=V<T>CV, Gq=V<T>GV, Bq=V<T>B, Lq=V<T>L to obtain a low-dimension simplified system model shown in the description, utilizing a simplified reduced-order model y=Lq<T>xq of the external system to substitute for an original external system model, and simultaneously subjecting a detailed model of the research system to simulation calculation to obtain an internal detailed transient process of the research system. The method for simplifying the passive electromagnetic transient-state simulation model of the large-scale power distribution network has the advantages of high accuracy, good stability, simplicity in algorithm and proneness to realizing.

Description

technical field [0001] The invention relates to a simulation model simplification method. In particular, it relates to a simplification method for electromagnetic transient simulation models of large-scale power distribution networks that retains passivity and is suitable for various electromagnetic transient simulation applications of intelligent distribution networks including distributed power sources, microgrids and energy storage devices. Background technique [0002] Since modern times, electric energy has been one of the most effective ways of energy utilization. With the growing demand for energy and the increasingly prominent environmental problems of human economic and social development, the traditional centralized power generation method dominated by fossil fuels is being challenged, and the distributed power generation technology that can make full use of various new energy sources is receiving more and more attention. The wider the attention and application. ...

AI Technical Summary

Problems solved by technology

At present, although there are many linear system dimensionality reduction and simplification methods that can be applied to the simplification of large-scale distribution network models, the traditional simplification methods cannot be guaranteed because of the inability to guarantee the passivity and stability of the simplified models obtained. The reliability and scope of application, the actual application effect is relatively limited

Images