Research on the risk assessment method of power grid engineering cost based on the material element extension method

With the deepening of the reform of China's power system, the national requirements for the industry to strengthen the supervision and monitoring level of power grid investment are increasingly strict, and further strengthening the cost control of power grid engineering, it is of great significance to improve the operating efficiency level of power grid enterprises. This paper establishes the risk identification process of power grid engineering cost, and constructs the risk assessment model of power grid engineering cost based on the material element extension method, and verifies the effectiveness of the model combined with empirical analysis.This risk assessment method can guide power grid enterprises to carry out the identification and evaluation of project cost risks reasonably, and reasonably avoid them on this basis, so as to improve the economic benefits of power grid project construction.