交流电力网络源流电气关系新解

Under the electricity market environment, determining market participants' source-flow relationship through power network is the basis of evaluating the issue of economic and environmental information flows related to power trade objectively and fairly. The traditional methods analyzing this relationship based on phasor form mean quantity are generally limited by nonlinear coupling of active and reactive value, so it is difficult to achieve a theoretical breakthrough. This paper reconsidered source-flow electrical relationship in AC power network from instantaneous value which doesn't have this problem. Firstly, discussed the source-load dual characteristic of the units in power network (source, load, branch and node) from the variation of instantaneous flow, and proved proportional sharing principle of node instantaneous current from the basic conditions of current formation. Based on this, proposed the method to calculate the source-load electrical component and its electrical share (ES) in full period of power frequency: 1) Established a special incidence matrix to calculate instantaneous current share between different source and load; 2) Calculated instantaneous power share according to node instantaneous voltage; 3) Got the power share relationship and ES coefficient between source and load by integrating full period of power frequency. Example shows the correctness of the proposed method.