Mixed transient-state analysis method and mixed transient-state analysis system

Abstract

The invention provides a mixed transient-state analysis method used for a multi-energy complementary comprehensive energy system and a mixed transient-state analysis system. A mixed transient-state model of the multi-energy complementary comprehensive energy system is constructed, a mixed-step-length transient-state analysis method is used for network analysis on a multi-energy coupling system, thus system-level analysis and calculation can be effectively supported, mixed transient-state simulation of long-term transient-states-power-system electromechanical-transient-states in a non-electrical system can be carried out from a time-domain angle, and precision of whole-process simulation on the system can be improved.

Description

technical field [0001] The invention belongs to the field of energy Internet, and relates to a hybrid transient analysis method and a hybrid transient analysis system for a multi-energy complementary comprehensive energy system. Background technique [0002] In recent years, the third industrial revolution characterized by energy Internet has been gaining momentum. The characteristic of the Energy Internet is to use the power grid as the backbone and platform to couple and complement various forms of energy. The network analysis of multi-energy coupling systems is one of the important research contents in the field of Energy Internet. It is the calculation basis and basis for system planning, operation regulation, and energy transactions. Here, not only the energy of the energy supply side and the energy consumption side of the system must be considered. To transform complementarities, the network balance of the multi-energy system should be considered. At present, in the ...

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Problems solved by technology

[0003] In contrast, literature [1] and [2] studied the joint power flow analysis of power grid, natural gas network, and heating network respectively. Literature [3] and [4] used the network flow model to analyze the coal, natural gas and power grid in the United States. Simulation analysis, these documents consider the network balance and the multi-energy characteristics of the system from the perspective of the system. The power grid part mainly considers some typical equipment in the traditional AC power grid, and the calculation method is also based on the traditional Newton-Raphson method. Mainly, for complex situations such as various types of grid equipment (such as new energy electric fields, FACTS devices, etc.) or the use of AC-DC hybrid grid structures, the above methods have not been explained. In addition, the existing technology does not mention that users can develop models by themselves And access the calculation method

[0004] On the other hand, currently there are professional simulation software in the fields of electricity and heat for auxiliary analysis, such as PSASP, BPA, PSCAD, etc. in the field of electricity, and Thermoflow, Ansys, Cycle-Tempo, etc. in the field of heat. However, these software Does not take into account coupling between pluripotents other than its own domain

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