Advantages of distributed photovoltaic distribution and storage

Since the power grid needs to maintain a dynamic balance between power generation and power consumption in real time, the scheduling of the power grid is extremely important. However, unlike traditional energy sources, PV power generation can only generate power during the daytime, which does not cover the whole day's peak power consumption, and an imbalance between power consumption and power generation will occur. At the same time, due to the PV power generation peak affected by sunlight, the peak at noon, the morning and evening curve changes, even during the daytime hours, cloudy, rain and other weather conditions will have an impact on the PV power generation, not easy for the grid to regulate the power, in order to promote the large-scale development of distributed photovoltaic, distributed photovoltaic distribution and storage is one of the most promising energy model.

(1) Enhance the PV grid-connected friendliness and save energy costs

Distributed photovoltaic distribution storage can be constructed in the user side of the small microgrid system, enhance the PV grid-friendly enhance the PV self-generation and self-use rate, can be grid-connected operation, but also independent of the output of electricity and other energy, can make up for the big grid in the stability of the shortcomings of the distributed PV distribution and storage of the inherent independence of the grid can also be avoided because of the big grid in a system failure (including distributed photovoltaic faults generated by the faults) triggered by the large-scale blackout, by reducing the centralized power supply to the centralized power supply. Power outage, by reducing the dependence on the centralized power supply system, greatly improving the safety and stability of electric energy.

In addition, distributed PV with energy storage is conducive to saving the construction cost of the energy storage system, energy storage comes with carbon emission reduction, peak shaving and filling in the valley, the value of emergency power backup and other functions can allow investors to comprehensively assess the cost of power equipment investment, distributed power generation market-oriented trading policy, energy storage policy and micro-grid policy frequently released, can make the investment risk of investors have been significantly dispersed.

(2) Realize user-side "source network, storage and load integrated" development

Energy storage widely involved in distributed PV layout, can maximize the mobilization of the load side of the regulatory response capacity, through the residual power on the Internet, the wall sale of electricity and other scenarios, with market price signals to mobilize the enthusiasm of the user to increase the flexibility of the load side of the regulation; to promote the production and use of energy in the vicinity of the realization of the user side of the "source of the grid, load and storage integration" development.

(3) Enhance grid flexibility and security

Distributed photovoltaic distribution and storage can also effectively improve the resilience and security of the power grid, and promote the construction of a power system that "focuses on renewable energy and clean energy generation (accounting for more than 70%-80%), combines backbone power sources with distributed power sources, and combines backbone power grids with local distribution grids and microgrids "1 . By supporting users' distributed power generation online, realizing the two-way flow of energy and information, aggregating distributed photovoltaic and energy storage flexibility regulation resources, tapping users' energy use flexibility through market-oriented means, and supplementing the power grid, a new power system with synergistic and complementary multiple forms of energy is being constructed, which will significantly improve the comprehensive utilization efficiency of energy and enhance the capacity of renewable energy consumption.