Method for splicing and integrating models in real-time simulation system of large power system

Abstract

The invention belongs to the field of simulation and computational analysis on power systems, particularly relating to a method for splicing and integrating models in a real-time simulation system of a large power system. The method is characterized in that the online calculating data of an intranet is reserved completely, an extranet is supplemented with offline data, and through integrating an offline model (which is not consistent in time and space) with online data, integrated data which is complete in modeling and consistent with the actual conditions of the power system can be provided in seconds or minutes. The method comprises the following steps: firstly, splicing and checking the online data, and carrying out grandstream verification on the online data so as to judge whether the online data is available; then, on the basis of intelligently setting up an online / offline data mapping table, supplementing the equivalent part of the extranet in the online data with the corresponding offline data; and finally, after adjusting the boundary connection and boundary grandstream, carrying out topology analysis and grandstream calculation on the whole network, thereby obtaining a model which can be used for the calculation of a large real-time simulation system.

Description

Technical field [0001] The invention belongs to the field of power system simulation and calculation analysis, and specifically relates to a method for splicing and integrating models in a large-scale power system real-time simulation system. Background technique [0002] With the establishment of the inter-regional power grid interconnection system in my country, to ensure the safe and stable operation of large power grids, to establish a grid security defense system, and to carry out online dynamic security assessment and early warning of the power system, it is urgent to optimize the grid structure, improve transmission capacity and power supply quality, and ease The overall tightness of power supply is also of great significance. Having a detailed calculation model and a data source that can reflect the real-time operating conditions of the power grid is the prerequisite for the power system's online dynamic safety assessment and early warning system to fully play its role. O...

AI Technical Summary

Problems solved by technology

Among them, the external network equivalent methods are roughly divided into two types: (1) direct equivalent method, which converts all external network equivalents into a smaller-scale equivalent network, and the equivalent methods include Ward equivalent and its variants, REI, etc. (2) Reserve a small number of detailed models of the external power grid as the buffer network, and use other parts of the external network as equivalent buffer network equivalent models; however, these methods use dynamic equalization for the external power grid model. Due to the complexity of system stability mode changes, it is difficult for the equivalent network to fully preserve the dynamic characteristics of the original network. Therefore, the dynamic equivalent method has not been well solved in the online field.

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