Power-gas energy flow distributed cooperative optimization calculation method based on alternating direction multiplier method

Abstract

The invention provides a power-gas energy flow distributed cooperative optimization calculation method based on an alternating direction multiplier method. Firstly distributed independent optimization bodies-a power optimization body and a natural gas optimization body are determined according to the research object power-gas interconnection system, and both of the bodies are in the same position; the connection features of the power-gas interconnection system are analyzed, a coupling element model is researched and abstracted as the corresponding coupling constraint, and power flow and natural gas flow shared variables are determined; second-order cone programming sub-problems corresponding to the bodies are constructed accordingly for aiming at the problem of natural gas system pipeline gas flow direction optimization by adopting the McCormick equation and the relaxation technology; and mutual interaction and alternating solution of all the optimization sub-problems can be performed according to the alternating direction multiplier method solving mode, and the convergence can be judged according to the convergence criterion so that distributed cooperative optimization calculation of the power flow and the natural gas flow can be realized.

Description

technical field [0001] The invention belongs to the field of multi-energy flow optimization calculation, and aims to realize distribution autonomy and coordination optimization of electric power system and natural gas system. Specifically, it relates to a distributed collaborative optimization calculation method of electric-pneumatic energy flow based on an alternating direction multiplier method. Background technique [0002] The Energy Internet is a new focus of international academic and business circles, emphasizing the open interconnection and collaborative optimization of multiple energy sources, and is known as the core technology of the third industrial revolution. At the same time, with the increasing pressure of environmental protection and technological progress, the trend of low-carbonization of global energy consumption is becoming more and more obvious. Compared with coal-fired / oil-fired units, natural gas units are relatively clean, and occupy an increasingly...

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Problems solved by technology

[0005] At the same time, in the optimization of natural gas systems, for the directionality of natural gas pipeline flow, the current optimization method is to pre-determine the pipeline flow direction based on experience and then optimize the calculation. In order to ensure the globality of the optimization results, the mixed integer second-order cone programming optimization method proposed by the present invention can effectively solve this problem

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