Photovoltaic + energy storage is the future development trend

Today, the development of new energy has two major driving forces.

First, human development and sustainability must have energy and must be new energy and clean energy.

Second, human beings must have a clean environment for sustainable development.

Solar energy is inexhaustible and inexhaustible. It has a natural and unparalleled advantage as a new energy source.

The renewable energy system is mainly distributed in a distributed way, and the point-type large-scale energy supply system has been changed, which provides space for the development of new energy storage systems. Specifically, an office building, an agricultural greenhouse, or even a home can be a point of production for energy. For example, an office building, with solar photovoltaic modules on the top of the building, installed with wind turbines to form a wind and light unit, and then collects internal sewage, and the potential energy of the water forms electricity for the sewage. This building can realize electricity. Self-supply; a variety of processing companies can also use waste to form biomass power to achieve electricity supply, and so on.

The combination of distributed solar energy and energy storage technology has many advantages. Solar and energy storage technologies have their own advantages. Solar power can achieve zero carbon emissions without additional costs. Energy storage technology provides backup power, frequency modulation, and other grid services. Combining the two can provide further advantages, especially to achieve continuous power supply at night, increase output during available generation time, and improve grid flexibility. In distributed communities and rooftop systems, the combination of solar and energy storage technologies can also reduce distribution network pressure and delay or reduce infrastructure investment. At the macro level, energy storage and solar power can increase solar energy penetration without major changes, thereby reducing carbon emissions. The combination of energy storage technology and solar power generation can also serve as a fast track for electrification in emerging markets.

Photovoltaic and energy storage to build a smart microgrid can improve the penetration and consumption of new energy, better meet the diverse needs of users, achieve accurate energy supply, reduce the deviation of electricity consumption, and improve the assessment income. Adding energy storage to the household power station can reduce the user's dependence on the power grid and use electricity more liberally.

There are two working modes of photovoltaic energy storage equipment:

One is a grid-connected household energy storage system, and the other is an off-grid household energy storage system.

The grid-connected household energy storage system is divided into three working modes:

Mode 1: PV provides energy storage and surplus electricity access to the Internet;

Mode 2: Photovoltaic provides energy storage, and some users use electricity;

Mode 3: Photovoltaic only provides partial energy storage.

The off-grid household energy storage system is divided into three working modes:

Mode 1: PV provides energy storage and user electricity (sunny);

Mode 2: Photovoltaic and energy storage batteries provide electricity for users (cloudy);

Mode 3: The energy storage battery provides electricity for the user (evening and rainy days).

Because the off-grid household energy storage system is independent and does not have any electrical connection with the grid, the entire system does not require a grid-connected inverter, and the PV inverter can meet the requirements.

Generally speaking, we may like to compare the energy storage power station to a water storage tank, which can store the surplus water in the low electricity period and use it again when the electricity peak is used, thus reducing the waste of electric energy. The power station can also reduce line losses, increase the service life of lines and equipment, and respond to user needs to achieve accurate power supply.

The page contains the contents of the machine translation.