Simulation evaluation method for island operation duration of integrated energy system

Abstract

The invention relates to a simulation evaluation method for island operation duration of an integrated energy system, which comprises the following steps: 1) analyzing historical operation data of renewable energy sources and loads in an integrated energy system, representing and extracting a source-load uncertain operation scene in the integrated energy system and an occurrence probability of the source-load uncertain operation scene; 2) according to the extracted uncertain scene of the source load of the integrated energy system, establishing a double-layer optimization model for joint evaluation of the energy network architecture and the operation duration under the island of the integrated energy system; and 3) performing equivalent conversion on the joint evaluation double-layer optimization model of the energy network architecture and the operation duration under the island of the integrated energy system, and solving the optimization model to obtain the operation duration of the island of the integrated energy system. The possible occurrence scene of the source load in the integrated energy system can be accurately considered, the island operation duration of the integrated energy system can be accurately evaluated through model optimization, and the problems of overestimation or underestimation erroneous judgment and the like caused by adopting the traditional fault recovery duration for estimation are avoided.

Description

technical field [0001] The invention relates to a method for simulating and evaluating the island running time of an integrated energy system. Background technique [0002] The integrated energy system can realize the coordinated operation and control of various heterogeneous energy sources by integrating multiple energy sources such as electric energy, thermal energy, and natural gas, and can effectively improve comprehensive energy utilization efficiency while meeting diversified energy demand. At the same time, when some energy subsystems fail, the integrated energy system can also complete the recovery of energy supply to some non-faulty areas through the complementary transformation of multi-energy flows and planning islands, and improve the reliability of comprehensive energy supply. The sustainable development of future energy and the protection of energy security are of great significance. [0003] But at the same time, due to the large uncertainty of each energy su...

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Problems solved by technology

[0004] In the existing research on the islanding duration after a fault, the islanding running time is generally equivalent to the fault recovery time, but the fault recovery time is unknown and difficult to predict accurately, and the fault recovery time is simply equivalent to the islanding running time, not only It cannot reflect the actual operating capacity of the island, and when the actual fault repair time is longer than the set time, it may also cause the energy stored in the backup energy storage to be exhausted prematurely due to the short estimate of the island’s operating time, making it difficult to realize Optimal energy supply in areas with faulty energy sources

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