Power distribution network elasticity improving method based on multi-energy coordination in extreme weather

Abstract

The invention provides a power distribution network elasticity improvement method based on multi-energy coordination in extreme weather. The method comprises the steps: simulating the disturbance process of an extreme weather through combining with the disaster-causing mechanism of the extreme weather for the power distribution network; analyzing the vulnerability of elements of the power distribution network under extreme weather disturbance, and establishing an element failure rate model; generating a probabilistic fault scene of the power distribution network based on a time-varying fault rate curve, and obtaining successive fault positions and fault moments of the power distribution network in the disturbance process; and simulating the response process of an integrated energy system after the power distribution network has a fault, adopting the optimal load reduction strategy of the power distribution network in the simulation process, taking a principle that the power distribution network preferentially guarantees important load power supply as a target, and supporting power supply of the power distribution network through multi-energy coordination to determine an optimal coordination scheme so as to improve the elasticity of the power distribution network.

Description

technical field [0001] The disclosure belongs to the technical field of distribution network elastic coordination, and relates to a distribution network elastic improvement method based on multi-energy coordination under extreme weather. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The drastic changes in the global climate lead to frequent extreme weather disasters, which pose a great threat to the safe and stable operation of the distribution network, often leading to large-scale power outages and causing serious social and economic losses. Therefore, the distribution network is required not only to continuously provide users with safe, reliable, high-quality, and economical electric energy under normal operating conditions, but also to have certain disaster resistance capabilities under extreme weather disturbances to ensure the cont...

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Problems solved by technology

[0006] (1) The most common strategy is to transform components such as high-strength lines or overhead lines into ground cables, but the limited funds for distribution network transformation prevent such measures from being implemented on a large scale, which limits the effect of elastic improvement

Other studies on improving resilience through post-disaster emergency control and recovery control mostly stay at the level of theoretical analysis and lack of application background;

[0007] (2) The supporting role of other tightly coupled energy systems in the context of integrated energy for the distribution network failure and recovery process is not considered, and the huge potential of multi-energy coordination in improving the flexibility of the distribution network is ignored;

[0008] (3) The different dynamic characteristics of multiple energy systems are not considered, and the process of multi-energy coordination and supporting power supply after a fault cannot be accurately simulated

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