Vulnerability evaluation and improvement method for electricity-gas comprehensive energy system

Abstract

The invention discloses a vulnerability evaluation and improvement method for an electricity-gas comprehensive energy system. The method comprises steps of establishing a network topology structure ofthe electricity-gas comprehensive energy system, according to the given initial fault proportion, simulating the initial fault of the system by utilizing a Monte Carlo algorithm to obtain an initialrunning state of the system, establishing a fault propagation model of the electricity-gas comprehensive energy system to obtain a fault propagation seepage equation, continuously iterating the seepage equation according to the fault propagation termination condition until the fault propagation termination condition is met to obtain a final running state of the system, and establishing a vulnerability parameter of the electricity-gas comprehensive energy system, calculating to obtain a vulnerability result of the electricity-gas comprehensive energy system, and improving the vulnerability result. According to the method, the vulnerability result of the electricity-gas comprehensive energy system can be quickly evaluated, the weak link of the electricity-gas comprehensive energy system is searched, and the propagation of the fault in the system is inhibited by taking measures, so that the vulnerability of the electricity-gas comprehensive energy system is effectively improved, and the probability of large-area collapse of the system is reduced.

Description

technical field [0001] The invention belongs to the technical field of electric power system and integrated energy system, and relates to an electric-gas integrated energy system optimization processing method, and relates to a vulnerability assessment and improvement method of the electric-gas integrated energy system in the case of deep coupling between the electric power system and the natural gas system. Background technique [0002] In recent years, with the advancement of natural gas extraction technology, the proportion of natural gas power generation in the total power generation of the power system is increasing, and the installed capacity of gas-fired units is also increasing. At the same time, there are many devices in the natural gas system, and the power load required for their normal work is provided by the power system, such as gas source equipment that relies on grid power supply and compressor equipment that relies on grid power supply. Obviously, the adopti...

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Problems solved by technology

However, these methods only consider the scenario where the power system operates independently, and do not consider the influence of other energy systems that are tightly coupled with the power system. The research results on the fault propagation mechanism cannot be effectively applied to the fault propagation analysis of the integrated energy system.

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