Photovoltaic Energy Storage: The Most Popular New Application Model This Year.
The development process of PV+ energy has also shown a trend of diversification in its application, In addition of self-generation and use, coping with time-sharing tariff and Power backup, the following forms of application have also emerged.(New Energy Storage)
Participation of household energy storage system in regional FM.
Some countries or regions have introduced energy storage system for household use into the mechanism of grid frequency regulation, such as FCAS (frequency control ancillary services) in Australia and FFR (dynamic frequency regulation) in the UK.
In these system, multiple PV +storage system installed in a decentralized manner are monitored and remotely controlled in a unified manner, and each independent system is able to stabilize the grid frequency by increasing the battery charging Power to absorb grid power or by discharging the battery to replenish the grid, depending on the range of real-time grid frequency fluctuation.
DC power supply has become more common in scenarios such as communication base station. In addition to DC application for special application scenarios, some attempts have been seen in common household PV +storage systems such as EV, DC charging (household), V2H, DC microgrid systems, etc.
01 Home DC charging
Integrated home light storage and charging systems, and even V2H systems currently have limited development in China, but with the maturity of technology, cost reduction and the development of electric vehicles, light storage and charging systems and applications such as V2G and V2H will demonstrate their flexibility in reducing electricity costs and ensuring electricity safety.
02 DC microgrid system
Distributed household PV storage systems are connected in parallel through DC busbars and monitored and controlled in a unified manner using an EMS management platform to achieve new energy power sharing and power trading in a specific area. Each household optical storage system is mainly for self-consumption, and the surplus power can be sold through the DC bus, and the shortage is supplemented by priority purchase of new energy power at low prices.
The microgrid systems operation mode is relatively flexible and can be adjusted according to the needs of different scenarios and is more adaptable. Microgrid systems composed by DC can be operated without participating in the large grid, reducing the negative impact on the grid and the requirement for grid regulation function.
03 Other DC application
There are many DC application scenarios, such as communication base stations, billboards, bus shelters, solar streetlights and other relatively independent application environments.
These scenarios generally use small amounts of electricity, have relatively homogeneous power-using equipment, and operate in a relatively independent environment. The application of DC power supply can improve the efficient of power application, and also improve the relative safety of power consumption.
Integrated light storage and charging
With the growth and popularity of the electric vehicle industry, the electric vehicle charging business has been driven. Conventional home charging are dominated by AC charging and have low charging power. The power source is mainly AC large grid. In recent years, the application mode of charging supported by new energy sources is also increasing.
Adding EV charging to a PV storage systems and connecting the charging systems directly to the PV storage systems can effectively reduce electricity consumption. In addition, home optical storage and charging systems have a better chance of improving charging speed and safety due to the limitation of maximum household power consumption.
There are many application scenarios for home optical storage, and the above are just a few of the modes listed above that have been applied with high enthusiasm this year. According to the development of the market now, we can foresee that there will be more application scenarios and application modes in the future.