Distributed photovoltaic energy storage peak regulation system based on power prediction

Abstract

The invention relates to a distributed photovoltaic energy storage peak regulation system based on power prediction, which comprises a photovoltaic unit, a grid-connected device, a power grid end, an off-grid device, power prediction, electric power dispatching, an energy storage device, loads and the like. The whole system is composed of the photovoltaic unit, a grid-connected inverter, a grid-connected electric energy meter, a gateway electric energy meter, a power grid, an off-grid DC / DC controller, an AC / DC controller, an energy storage management system, an off-grid DC / AC controller, a DC load, an AC load, an energy storage device, a power prediction device, a switch control unit, a communication unit, controlled switches K0, K1, K2, K3, K4 and K5 and the like. The output of the power prediction controls the state of the controlled switch via the switch control unit, and thus, the distributed photovoltaic energy storage peak regulation system based on power prediction can dispatch the residual capacity of the energy storage device in advance, and the following purposes can be realized: when future photovoltaic output is larger than the load, the redundant photovoltaic electric energy is stored by the energy storage device, the distributed photovoltaic self-generation self-use ratio maximization is realized, and the distributed photovoltaic income level is improved; in the case of future mains supply failure, the part with insufficient load is provided by the energy storage device and the photovoltaic off-grid power supply device, and the reliability of the power supply system is improved; and functions of peak load shifting are provided for areas with significant step tariff, the comprehensive utilization rate of the system is improved, and the income level is improved.

Description

Technical field [0001] The invention relates to a distributed photovoltaic energy storage peak regulation system based on power prediction, and belongs to the application field of new energy and distributed photovoltaic energy storage peak regulation. Background technique [0002] Energy and environmental issues are an important factor restricting economic and social development. The use of traditional energy has great environmental costs. Photovoltaic power generation belongs to the field of new energy power generation, and its environmentally friendly features are a breakthrough in solving energy and environmental problems. In recent years, China has built a large number of large-scale ground-based photovoltaic power stations, which have left some negative effects while promoting the development of the photovoltaic industry. Due to land use restrictions, large-scale photovoltaic power stations are mostly built in sparsely populated, deserted, and deserted areas in the northwest....

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of insufficient proportion of self-consumption of distributed photovoltaic power generation, the present invention proposes a distributed photovoltaic energy storage peak-shaving system based on power prediction. While the proportion of self-use is insufficient, it can further realize the use of peak and valley electricity prices to cut peaks and fill valleys, and as a backup power supply to improve the reliability of the power supply system

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