An Information Flow Modeling Method for Grid Energy Management System

Abstract

The invention relates to an information flow modeling method for a power grid energy management system, which belongs to the technical field of power system analysis and evaluation. The method comprises the steps that the key factor information flow of power information-physical coupling is extracted as the analysis target; input and output information of each module in the actual system are abstracted as information nodes respectively, and the function of each module is modeled as an information branch; and the information flow model of the energy management system is designed based on the information flow mapping of the graph theory. According to the invention, the method extracts the core characteristics of the information-physical coupling between a power system and the energy management system; theoretical modeling of the power grid energy management system is realized; and based on the model, the influence of information disturbance on control variables can be analyzed, which provides a theoretical support for evaluation and optimization of the energy management system in future.

Description

technical field [0001] The invention relates to an information flow modeling method of a grid energy management system, belonging to the technical field of power system analysis and evaluation. Background technique [0002] With the development of smart grid and energy Internet, the power system and its control system together constitute a typical cyber-physical system, of which the energy management system (EMS, Energy Management System) is a typical example. The system covers real-time perception of wide-area information (RTU / PMU), information transmission (power carrier / optical network, various protocol forms), information processing (bad data identification / state estimation), information decision-making (power flow analysis / safety analysis / optimization calculation), closed-loop control (AGC / AVC), etc., cover thousands of kilometers in space, milliseconds to hours in time, and take into account various requirements such as safety, quality and economy in terms of goals. ...

AI Technical Summary

Problems solved by technology

However, there are some deficiencies in these studies. First, the current information-physical coupling modeling method lacks versatility and cannot uniformly model information faults; coupling evaluation focuses on research on topological accessibility and lacks quantitative analysis; simulation Although the method can give accurate results, the model is complex and the amount of calculation is large, so it cannot be used for theoretical analysis

However, after careful study of this issue from the perspective of network analysis, it is not difficult to find that the impact of EMS on power grid operation is essentially a process in which information flow affects energy flow

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