Distributed collaborative optimization calculation method of electricity-gas energy flow based on target cascade analysis

Abstract

The invention discloses a distributed collaborative optimization calculation method of an electricity-gas energy flow based on target cascade analysis. Firstly, a coupling element model is analyzed according to the connection characteristics of an electricity-gas interconnection system, and the coupling element model is abstracted into a corresponding coupling constraint to determine shared variables of an electricity flow and a natural gas flow; on the basis of this, an electricity-gas flow decomposition collaborative mechanism based on the target cascade analysis is constructed; and further an electricity-gas flow collaborative optimization problem is split into a higher-level coordination primal problem and lower-level optimization sub-problems (including: an electricity optimization sub-problems and a natural gas optimization sub-problem), and the upper-level and lower-level problems are alternatively solved in sequence to convergence to achieve the distributed collaborative optimization of the electricity flow and the natural gas flow.

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 electrical-gas energy flow based on target cascading analysis. Background technique [0002] 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 important position in the world's primary energy supply system: currently, gas-fired units in the United States, the United Kingdom and Japan account for 40% of the total installed capacity, respectively. 34% and 29%; as of the end of 2013, the installed capacity of gas-fired power generat...

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Problems solved by technology

[0005] The high integration of power system and natural gas system will help to improve the energy utilization efficiency of the integrated energy system, reduce environmental pollution and improve economic costs. Safe, economical and reliable operation presents new challenges

[0006] In reality, electricity and natural gas systems are generally operated and managed by different operators, and only a small amount of data interaction is supported between the two systems. There is a scheduling method to obtain the global information of the entire electricity-gas interconnected energy system through the electricity-gas joint dispatching center. Information exchange difficulties, information leakage and other issues

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