Method for improving element vulnerability of electricity-gas comprehensive energy system

Abstract

The invention discloses a method for improving the element vulnerability of an electricity-gas comprehensive energy system. The method includes: inputting original data, and establishing an electricity-gas comprehensive energy system operation state model to obtain an operation result in an initial normal state; extracting a network topology structure of the comprehensive energy system, and performing processing to obtain structural vulnerability parameters of the elements; simulating an element fault to obtain an operation result of the system in a fault state; obtaining the gas flow distribution entropy of the natural gas system and the power flow distribution entropy of the power system, and obtaining the operation vulnerability parameter of the element; and calculating the weight of each parameter by using an optimal combination weight method to obtain the comprehensive vulnerability of the element. According to the method, key protection can be rapidly carried out on the element with high vulnerability, the reliability of the element is improved by thickening the power line and reinforcing the natural gas pipeline, the overall operation reliability and robustness of the systemare effectively improved, and the probability of large-area faults 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 a method for improving the vulnerability of electric-gas integrated energy system components under the condition of deep coupling between electric power system and natural gas system. Background technique [0002] In recent years, with the gradual increase in the proportion of natural gas power generation and the application of grid-powered gas source equipment, the coupling operation of natural gas systems and power systems has become increasingly tight. Obviously, the interdependence and mutual influence of the natural gas system and the electric power system will increase the vulnerability of the electric-gas integrated energy system. On the one hand, the outage of the natural gas pipeline in the natural gas system may lead to the interruption of the natural gas fuel supply of the gas-fired units, which will further cause insufficient p...

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Problems solved by technology

However, these methods do not analyze the components in the system, resulting in poor improvement of the vulnerability of system components

In addition, the current research method only considers the scenario where the power system operates independently, and does not consider the impact of other energy networks that are tightly coupled with the power system. The coupled operation of the two power systems and the natural gas system makes the two more closely linked. It depends on its own system, but also depends on other coupling systems

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