Photovoltaic air-conditioning power supply control system and control method based on peak and valley price

Abstract

The invention relates to a photovoltaic air-conditioning power supply control system and control method based on peak and valley price. The control system includes a DC air conditioner electrically connected with a converter, the converter acquires the peak and valley price information, the power-consuming period of the photovoltaic air-conditioning power supply control system at present is determined based on the peak and valley price information, the electric energy management information corresponding to the power-consuming period is transmitted to the DC air conditioner, the DC air conditioner receives the electric energy management information and the operation mode of the DC air conditioner is determined based on the electric energy management information, and the converter determines the power supply mode of the photovoltaic air-conditioning power supply control system based on the operation mode of the DC air conditioner. Through the combination of the peak and valley price of a power grid and the electric energy management of the photovoltaic air conditioner, the power supply mode of the system is reasonably planned based on the peak and valley price information, so that the electricity charge of users is effectively reduced, and grid-connected power generation can be achieved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic air conditioners, in particular to a photovoltaic air conditioner power supply control system and control method based on peak and valley electricity prices. Background technique [0002] Due to the mismatch between the power generation peak and the power consumption peak, the power flow in the power grid changes, and the per unit value of the distribution network node voltage changes, which affects the stability of the power grid. Therefore, the state has introduced a policy of peak and valley electricity prices, that is, during the peak period of electricity consumption, increase the electricity price of residents, use price levers to curb electricity consumption by residents, give priority to ensuring electricity consumption in important areas such as industry and national defense, and wait for non-industrial electricity consumption at night Reduce electricity prices for residents during p...

AI Technical Summary

Problems solved by technology

[0003] The photovoltaic air-conditioning system usually generates electricity during the day and consumes electricity at night, which can play a role in peak-shaving and valley-filling of the power grid to a certain extent. However, due to the cost and installation space of the photovoltaic air-conditioning system, the number of photovoltaic cells is limited. Even during the day, if the weather conditions are bad, electricity will be drawn from the grid for air conditioning

In addition, with the refinement of electricity price division, it is difficult to match peak and valley electricity prices only by diurnal changes

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