Research on Power Grid Engineering Risks Assessment Based on AHP under EPC Mode

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This paper analyses and summarizes papers about engineering projects in the domestic and foreign EPC mode, and researches the risk management of power grid project based on AHP under EPC mode. Firstly, the paper describes the application and research of EPC mode in China's electric power engineering, and analyses the existing risk management under EPC mode. Secondly, this paper expounds the basic theory of risk management, and puts forward the principle and standard of risk assessment, and defines the basic process and method of risk management. Thirdly, it introduces the analytic hierarchy process in this paper. At last, according to the process and characteristics of power grid construction in EPC mode and the use of risk identification and assessment theory, the paper empirically tests the application of risk management under EPC mode in Leshan substation engineering through the AHP. In the international general contracting market, EPC general contracting model is favored for its ability to transfer engineering construction risk, save investment and give full play to the leading role of design. It is gradually applied to large scale projects in various industries. The implementation of EPC in power grid project increases the controllable initiative of the general contractor, achieves the design, procurement, construction of internal coordination, mitigates the contradiction between the parties, and reduces the cost of coordination of the EPC general contractor, which is conducive to the overall progress of the general contractor's risk management. Therefore, EPC will become the mainstream mode of power grid project contracting. However, at present, the research on risk evaluation of power network based on EPC mode is less. Because of the successful application of EPC mode in all kinds of projects in China, experts and scholars realized that it will be used in the trend of power grid project, and strengthening the research on risk assessment of power grid project with EPC mode will give a technological favor to risk analysis. Some scholars pointed out that EPC can well solve some problems arise from China's power shortage and the limitation of power investment funds, elaborated problems should be noticed with the use of EPC model in wind farm projects from the owner's point of view, and on the basis built a set of risk assessment models. This paper stands at the owner's point of view, and the results will be very different from the perspective of the general contractor. There were also scholars who used evaluation method combined entropy method and sequencing method to analyze the risk factors that the domestic associated total contractors based on EPC mode may face, but the method cannot be completely copied in the power grid project. Some scholars have put forward the measures to reduce the risks of the general contractor based on EPC mode's connotation and advantages, and summarized the risks of the project. But the proposed solution is relatively simple and there is no scientific risk evaluation method as a support. On this basis, this paper adopts the AHP method, analyses and evaluates the risk of power grid project based on EPC mode, and provides methods and ideas on how to evaluate the risk of EPC project.