In order to study the ability of microgrid to absorb renewable energy and stabilize peak and valley load, This paper considers the operation modes of wind power, photovoltaic power, building
Download Citation | On Sep 20, 2022, S. H. Gao and others published Multi-Mode Operation Control Strategy for Photovoltaic Energy Storage Systems with Shared Current Loop | Find,
Based on the model of conventional photovoltaic (PV) and energy storage system (ESS), the mathematical optimization model of the system is proposed by taking the combined benefit of
holds install solar-plus-storage systems, in which the battery storage only charges from solar PV and the battery can discharge and export to the grid besides meeting the on-site load (Figure
Establish a capacity optimization configuration model of the PV energy storage system. Design the control strategy of the energy storage system, including timing judgment and operation mode selection. The characteristics and economics of various PV panels and energy storage batteries are compared.
The main structure of the integrated Photovoltaic energy storage system is to connect the photovoltaic power station and the energy storage system as a whole, make the whole system work together through a certain control strategy, achieve the effect that cannot be achieved by a single system, and output the generated electricity to the power grid.
In the default condition, without considering the cost of photovoltaic, when adding energy storage system, the cost of using energy storage system is lower than that of not adding energy storage system when adopting the control strategy mentioned in this paper.
In order to make the operation timing of ESS accurate, there are three types of the relationship between the capacity and load of the PV energy storage system: Power of a photovoltaic system is higher than load power. But this time, the capacity of ESS is less than or equal to the total demand capacity of the load at peak time;
Control strategy The purpose of the control strategy proposed in this paper is to satisfy the stable operation of the system by controlling the action model of the photovoltaic and energy storage systems. The control strategy can allocate the operation modes of photovoltaic system and energy storage system according to the actual situation.
The allocation of energy storage in the PV system not only reduces the PV rejection rate, but also cuts the peaks and fills the valley through the energy storage system, and improves the economics of the whole system through the time-sharing electricity price policy. 3.3.1.
