Coupling Analysis of Energy Flow and Economic Flow in Power Grid

doi:10.11930/j.issn.1004-9649.202007174

Abstract

Abstract: A natural coupling relationship exists between the energy flow information from power network source-flow pairs and the transaction information from power market subjects. If this relationship cannot be handled correctly, it will lead the relevant economic flow distribution information to be inaccurate, which would further affect the efficiency of power system operation and the fairness of power market operation. Therefore, based on the real-time energy flow information provided by the energy tracking method, and considering the above coupling characteristics, the economic flow distribution information along the energy delivery path chains among network source-flow pairs is discussed, and the real-time electricity price expressions serving for various cost accounting are given. For two billing ways respectively based on the sending and receiving energies in a path chain, a general principle of cost-accounting consistency is put forward. If the influence of real-time operation state of network is not considered, and the off-grid electricity price is calculated as the sum of the on-grid price, the over-grid price and the governmental fund price, the cost-accounting consistency principle will not be fully satisfied. Finally, for typical transaction modes and their associated multiple network source-flow pairs, the expressions of various economic flow distribution are proposed for quantitative analysis. Case study shows that the economic flow obtained by analyzing the real-time electricity price via considering the coupling characteristics can meet the principle of cost-accounting consistency, which will provide a theoretic basis for revealing the internal causes of cross subsidy.

Key words: electric power network, power market, energy flow, economic flow, coupling, real-time electricity price

YU Jilai, GUO Yufeng, SHENG Yuhe, ZHANG Wei, WANG Songyan. Coupling Analysis of Energy Flow and Economic Flow in Power Grid[J]. Electric Power, 2022, 55(6): 42-52.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202007174

https://www.electricpower.com.cn/EN/Y2022/V55/I6/42

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