Peak and Valley Time Price Model and Simulation Based on System Dynamics Part Two Simulation Results and Analysis

Simulation and comparison studies of different peak and valley time price policies and different response types of users are carried out by simulation software VENSIM special for system dynamics. The simulation results show that: (1) The optimal price structure is that the base price is regulated with generation price and power supply benefits, and the ratio between peak and valley prices is fixed in the initial implementation stages and then adjusted with load characteristic when load become stable. (2)Different response type of users have different satisfied price structure, so the price structure parameters should be set differently. (3)The average price presents attenuated damping trend under the operation of the supply and demand benefit equilibrium mechanism , and the damping amplitude is proportional to the lingering time and the peak and valley price difference which should comprehensively consider the target of peak load shifting, average price fluctuation amplitude and user's enduring capability. Simultaneously, it should also shorten the price regulation time as short as possible, and smooth the price fluctuation to increase the social benefits of peak and valley price policy.