Variable step size dynamic simulation method for integrated energy system

Abstract

The invention discloses a variable step size dynamic simulation method for an integrated energy system, and belongs to the field of dynamic simulation of energy systems. A variable step size dynamic simulation method for an integrated energy system comprises the following steps: step 1, evaluating the harmfulness of a fault by using a fault hazard evaluation strategy according to the specific condition of the fault (i.e., the effect of a fault point in the operation of a heat supply network and the severity of the fault), and obtaining two-stage harmfulness evaluation quantitative data of the fault; through a certain reasonable mathematical change, the numerical value is changed into a quantized numerical value which can be directly subjected to weight determination; and 2, determining the precision driving weight under the fault by adopting a corresponding weight determination method according to whether the fault is a single fault or not. According to the method, the basic thought of variable step size dynamic simulation is adopted, pre-optimization of the fault state dynamic simulation time step size of the comprehensive energy system is achieved, the simulation efficiency is effectively improved, the simulation precision and speed are balanced, and a powerful guarantee is provided for safety check of the comprehensive energy system.

Description

technical field [0001] The invention belongs to the technical field of energy system simulation analysis, and in particular relates to a method for dynamic simulation of a comprehensive energy system with variable step size. Background technique [0002] Most of the traditional energy systems are based on discrete operation. Most mainstream energy systems such as coal, oil, natural gas, electricity, and cooling / heating systems operate independently, forming relatively closed industries and barriers to interests. Due to the existence of these barriers, multiple energy sources cannot play their complementary interaction characteristics and cascade utilization potential, thus lowering the comprehensive utilization efficiency of energy, increasing carbon emissions and aggravating environmental pollution to a certain extent. [0003] In the context of the urgent need for transformation and upgrading of the world energy system, the concept of Integrated Energy System (IES) has bee...

AI Technical Summary

Problems solved by technology

[0005] In dynamic simulation, the selection of the simulation step size has a crucial impact on the simulation speed and accuracy. If a larger simulation step size can save the simulation time, it will cause a large numerical error in the simulation results; if the simulation step size is reduced It can improve the advantages of simulation accuracy, but it will lose a certain simulation speed, and the real-time performance of simulation cannot be guaranteed, that is, the existing dynamic simulation technology cannot achieve fast simulation speed and high simulation accuracy at the same time.

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