Evaluation and analysis of power grid investment benefit efficiency based on DEMATEL-improved grey correlation method

Abstract

In view of the current provincial and municipal power supply companies in the process of allocating investment funds, there is a problem that the distribution of investment funds is roughly based on analysis of historical data, which is easy to form investment imbalances and cause weak links in power grid construction to be unable to be reasonably strengthened.This paper proposes an evaluation and analysis method of power grid investment benefit efficiency based on DEMATEL-improved grey relational method, and constructs a power grid investment benefit efficiency index system from the perspectives of construction necessity, economy, safety and power supply reliability. The evaluation laboratory method (decision making trial and evaluation laboratory, DEMATEL) accurately identifies and selects the key influencing factors, and uses the improved grey relational analysis method based on information entropy to quantify the correlation degree of the influencing factors to find the weak points of power grid investment and construction link. In the case analysis, the ten key factors affecting the investment efficiency of the power grid were screened out by the method, and the comprehensive scores and construction weaknesses of different power supply areas were obtained. The situation proves the effectiveness and rationality of the method, which can guide the investment direction scientifically and improve the investment efficiency.