Electrical interconnection system toughness evaluation and improvement method considering earthquake uncertainty

Abstract

The invention discloses an electrical interconnection system toughness evaluation and improvement method considering earthquake uncertainty, and the method comprises the steps: carrying out the combination enumeration of an earthquake source position and an earthquake magnitude gear, and obtaining the probability of each potential earthquake scene according to an earthquake disaster probability model; then, obtaining intensity distribution of different earthquake scenes through the intensity attenuation model, and solving the element failure probability based on the intensity according to a pre-built electrical interconnection system; applying an electrical interconnection system load reduction optimization algorithm based on a two-stage gas network optimization power flow model to solve the load reduction amount in each order fault state; calculating a toughness index according to the probability of each potential earthquake scene, the element failure probability and the load reduction amount in each order of fault state, if the system-level toughness index is lower than a set standard value, determining that the planning scheme reaches the standard, and otherwise, determining that a toughness improvement strategy needs to be implemented; and obtaining a plurality of alternative schemes according to the element-level toughness index, and formulating an element strengthening scheme through cost-benefit analysis, so as to correct the planning scheme.

Description

technical field [0001] The invention relates to the field of electrical interconnection, in particular to a method for evaluating and improving the resilience of an electrical interconnection system in consideration of earthquake uncertainty. Background technique [0002] In recent years, earthquake disasters have occurred frequently in the world, which not only poses a threat to the safety of people's lives and property, but also has a destructive impact on the energy system. Under the earthquake disaster, the failure probability of the infrastructure of the transmission network and the gas transmission network increases sharply, and as the coupling degree between the two is deepened, the energy interaction process cannot be ignored. It is necessary to comprehensively analyze the impact of earthquakes on electrical interconnection systems and evaluate the resilience of electrical interconnection systems under earthquakes. [0003] Resilience refers to the ability of the sy...

AI Technical Summary

Problems solved by technology

Mixed integer nonlinear optimization problems are generally difficult to find the optimal solution, and existing solvers such as lingo, even if they can solve such optimization problems, their calculation speed and calculation accuracy cannot meet the needs of toughness evaluation

However, the simplification of the optimization model of the electrical interconnection system also simplifies the constraints of the power system and the natural gas system, and the accuracy of the model is low

Images