电网能量流-经济流耦合分析

依托于同一电力网络的电气源流间的能流信息和市场主体间的交易信息，存在某种天然耦合关系。若不能正确处理，则易导致相关经济流分布信息掌握失准，从而影响系统运行的效能和市场运作的公正性。为此，基于电力网络电能追踪方法正确提供的实时能流信息，考虑上述耦合特性，分析了沿网络源-流对电能配送路径链分布的经济流信息，建立了核算各项费用的实时电价关系式；针对链首和链末2种能量计费方式，提出了具有广泛指导性的费用核算一致性原理，并指出：若不考虑电网实时运行状态影响而直接以上网价、过网价和政府性基金价之和作为下网电价核算相关费用，则会出现不完全满足一致性原理的现象。最后，针对典型交易模式及与其关联的多个网络源-流对，给出了量化其经济流分布的关系式。算例表明，基于考虑耦合特性的实时电价信号分析的经济流，符合核算一致性原理，可为进一步揭示交叉补贴内因提供理论依据。

Coupling Analysis of Energy Flow and Economic Flow in Power Grid

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.