Abstract
The structure and form of modern power grids are becoming more and more complex, and there are many indicators and factors that need to be considered to evaluate the development status of the power grid. In order to diagnose the development level of power grid, the index system is reconstructed, which includes seven dimensions: the coordination of power grid development speed, the coordination of power grid development scale, the coordination of power grid structure, the security and reliability of power grid, the level of equipment, the utilization efficiency of power grid and the development benefit of power grid, the construction principle and index selection basis are given. When dealing with contradictory problems in reality, methods combining quantitative and qualitative can be applied to study. The matter element analysis method is applied to power grid development diagnosis, and a model of power grid development diagnosis based on matter element analysis is established, the model can not only diagnose the development level of power grid, but also determine the key factors that affect the diagnosis results, and give suggestions for improvement. The practical example verifies the feasibility and rationality of the method, which has good evaluation accuracy and prediction effect.
Highlights
With the rapid development of national economy, the scale of power grid continues to expand, the structure of AC/DC hybrid is more and more complex [1], and all kinds of problems restricting the development of power grid are exposed one after another [2]
Combined with the operation criteria of power grid and the sensitivity of power grid development level to different indicators, analytic hierarchy process (AHP) 1-9 scaling method is used to determine the weight, and a diagnosis model of power grid development based on matter element analysis is established
Matter element analysis method comprehensively considers the situation that things belong to the inside and outside of the set, and extends the evaluation interval of traditional analysis method to positive value, which more precisely describes the degree of things belonging to the evaluation interval, solves the problem of similar membership degree, and negative value reflects the possibility of things transforming into the evaluation interval, so as to obtain the development level and change trend of the research object
Summary
With the rapid development of national economy, the scale of power grid continues to expand, the structure of AC/DC hybrid is more and more complex [1], and all kinds of problems restricting the development of power grid are exposed one after another [2]. In such a situation, it has become an important work to evaluate the development level of power grid, find out the short board in the process of power grid development, and provide the basis for planning power grid development and making investment decisions. According to the classification results and transformation trend of single index, the key factors affecting the development level of power grid are determined, and the development suggestions are put forward
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