Peak-valley Time-of-Use Tariff Formulation Method Based on Net Load Curve

The purpose of peak-valley Time-of-Use (TOU) tariff is to adjust the source and load power of the power system, aiming to alleviate the supply-demand contradiction. As the construction of China’s new power system moves forward, the installed capacity of uncertain power sources, such as wind power and photovoltaic has increased significantly. And also the power system structure has changed greatly, following great changes of manifestation of the supply-demand contradiction. This paper proposes that the time period and concrete price of peak-valley TOU tariff should be reformulated based on the net load curve. Firstly, the existing problems of current peak-valley TOU tariff are pointed out under large-scale cyber new energy, illustrates the fact that the peak or valley period may not correspond to the actual depths of supply-demand contradiction. Secondly, the paper proposed that the peak-valley TOU tariff should be formulated based on the net load curve, due to that reflecting the actual depths of supply- demand contradiction. Thirdly, the effect of user’s response to TOU tariff on output of those adjustable units is analyzed. Finally, the example verifies that the peak-valley TOU tariff formulated based the net load curve can truly reflect the between supply-demand contradiction of power system. It may stimulate users to adjust their consumption behavior, reduce peak-valley differences of other adjustable units operation.