Photovoltaic power management method, photovoltaic power management system and power distribution control device

Abstract

The invention discloses a photovoltaic power management method, a photovoltaic power management system and a power distribution control device. The photovoltaic power management system comprises a photovoltaic power generation system, a power transmission network, a load, a storage battery and the power distribution control device, wherein one end of the power distribution control device is connected with the photovoltaic power generation system, and the other end of the power distribution control device is connected with the power transmission network, the load and the storage battery. The power distribution control device is used for determining a power distribution scheme matched with a current power supply mode on the basis of the current power supply mode when photovoltaic power inputted by the photovoltaic power generation system is acquired and applying the power distribution scheme to execute corresponding power distribution operations between the storage battery and the power transmission network or the load according to electrification requirements of the power transmission network or power supply requirements of the load. By the photovoltaic power management system, reasonable distribution of photovoltaic power between the storage battery and the load or the power transmission network can be realized according to the current power supply mode and the electrification requirements of the power transmission network or the power supply requirements of the load, and accordingly power supply requirements of users can be met while waste of surplus photovoltaic power is avoided, and photovoltaic power utilization rate is increased.

Description

technical field [0001] The present invention relates to the technical field of photovoltaic power generation, and more specifically, to a photovoltaic power management method and system, and a power distribution control device. Background technique [0002] In recent years, new energy photovoltaic power generation has been widely used. The energy storage system stores the excess electric energy of photovoltaic power generation in energy storage units such as batteries, and releases the electric energy in the energy storage unit to supply power to loads or power grids when the light is weak, so as to achieve energy stabilization. , in order to use Tianyang Energy more smoothly. [0003] At present, there are two schemes for photovoltaic power generation and energy storage power generation to be used together: AC-side coupling and DC-side coupling. Among them, the energy loss of the exchanger in the AC-side coupling mode is relatively large, and the energy loss of the DC-side ...

AI Technical Summary

Problems solved by technology

However, the DC side coupling method is usually that the photovoltaic power generation system and the battery are combined through a DC-DC converter, and then connected to the inverter. This system architecture has the problems of long energy paths and large energy losses.

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