Interconnected electric network distributed current calculating method on the basis of alternation and iteration of current module

Abstract

The invention discloses an interconnected electric network distributed current calculating method which is based on alternation and iteration of current module. The method comprises that initiation is carried out to current calculating module data of an inner net and an outer net firstly; alternation and iteration of the inner net current calculating module and the outer net current calculating module are carried out in a current calculating task computer of the inner net dispatching and controlling centre so as to present linkage of electric relationships of the inner and outer nets, therebyconverging two independent currents into a uniform target current solution. The method employs an integrated calculating mode, so as to avoid complex work of prototype model splicing and computation module splicing; the method has precise calculation result and strong integrity and is free of special requirements to current calculating module and algorithm. Therefore, the method can be widely applicable to various application areas of power network analysis, such as EMS, DTS, offline power network operation analysis and calculation and so on. Therefore, the method has relatively strong popularization and application value.

Description

technical field [0001] The present invention relates to a distributed power flow calculation method for interconnected power grids, in particular to a power flow calculation problem for multiple dispatching control centers with electrical connections in the power grids under their jurisdiction, and a distributed power flow calculation for interconnected power grids based on alternating iterations of power flow modules The method belongs to the technical field of power grid dispatching automation. Background technique [0002] The power system is a complex large system composed of power plants, substations, transmission and distribution networks and users, which are dispatched and operated in a unified manner. In the power system, since most of the power points and load centers are located in different regions, and the electric energy cannot be stored in large quantities, the balance between electric energy production and consumption must be maintained at all times. The powe...

AI Technical Summary

Problems solved by technology

This method retains the advantages of centralized computing and avoids the complicated and systematic model splicing and maintenance work; but its disadvantages are: 1) The splicing method is highly coupled with the algorithm. Only when multiple dispatching control centers use the same algorithm, the best Only when products from the same supplier are used can it be conveniently spliced; 2) It is not suitable for application scenarios such as DTS that require continuous interaction between dispatching and control centers

This method performs equivalent simplification on the external power grid model, which reduces the amount of calculation, but its disadvantages are: 1) model splicing, model export and import are required, and the maintenance workload is large; 2) equivalent simplification calculations bring a certain amount of calculation Accuracy error; 3) In application scenarios such as DTS, online equivalent results need to be released continuously, and the efficiency is low

However, the essence of this algorithm is to use the hierarchical distribution characteristics of the two power grids to design a continuous dynamic mutual matching and tracking algorithm, which cannot obtain a strict power flow solution at a given time and under a given solution condition, and cannot be applied For conventional power flow calculation, it is only suitable for simulation applications based on continuous power flow such as DTS, and cannot solve the problem of series supply between regional power grids

Images