Reliability evaluation method and system for offshore multi-platform interconnected power system

Abstract

The invention relates to a reliability evaluation method and system for an offshore multi-platform interconnected power system. The method comprises steps of determining the load power at each grade according to a priority tripping load shedding model, and forming a load shedding residual power table; generating an equivalent virtual connection diagram containing a virtual power supply and a virtual full load node according to the load shedding residual power table, and generating an element outage table of all elements in the system; calculating the probability that the load level triggers the priority tripping and the overall power loss probability of the power distribution system grade by grade; the influence of the power generation and transmission system on the power distribution system being equivalent to the power distribution system, and a Bayesian network being adopted to calculate reliability of the whole system. According to the method, reliability and weak links of the offshore multi-platform interconnected power system can be evaluated, rapid and accurate calculation can be realized, and the method is used for reconstruction and extension of the offshore multi-platform interconnected power system; the method can be widely applied to the technical field of power system reliability evaluation.

Description

technical field [0001] The invention relates to the technical field of power system reliability assessment, in particular to a reliability assessment method and system for an offshore multi-platform interconnected power system based on random network flow and Bayesian network. Background technique [0002] The ocean is rich in resources, especially for China, and offshore oil plays an important role in China's energy security. As a power source, the multi-platform interconnected power system of offshore oilfields plays an important role in the development and utilization of marine resources with its reliable and efficient operation. By evaluating the reliability of the offshore oilfield power system, it is of great practical value to find out the reliable weak points and redundant links of the multi-platform interconnected power system in the offshore oilfield, and to provide guidance for future offshore oil platform construction planning. [0003] After decades of developm...

AI Technical Summary

Problems solved by technology

However, the current research on the reliability of multi-platform interconnected power systems in offshore oilfields is not perfect. At present, the reliability evaluation mainly uses the Monte Carlo method to calculate the reliability indicators of the whole system, and the statistical analysis has a greater impact on the reliability of the whole system. On the one hand, Monte Carlo sampling is random, and it is analyzed for the whole system, without detailed analysis of the influence degree of the fault factors affecting the platform. On the other hand, Monte Carlo method needs to obtain higher calculation accuracy It requires a large amount of calculation, which is not conducive to evaluating the importance of single influencing factors of reliability

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