A PEDF power distribution system can effectively solve two key problems of zero-carbon transition of power system, namely increasing the installed capacity of distributed renewable energy generation and effectively consuming the fluctuating renewable energy generation. PEDF is the abbreviation of the application of photovoltaics (P), energy storage (E), direct current (D) and flexibility (F) in the building field, which is not just simply combine the above technologies independently, but is organically integrated and constitute a whole to realize “flexible energy use”, i.e. to achieve friendly interaction between buildings and the grid. 

The development of a new type of power distribution method for buildings, including photovoltaics (P), energy storage (E), direct current (D) and flexibility (F), is an effective means to suppress grid fluctuations, effectively consume renewable energy, and achieve “carbon neutrality” in buildings. 

ENERGY STORAGE (E) 

Diversified distributed energy storage, controlled by charging and discharging, acts as a regulating pool for building energy, which includes energy storage devices in buildings, including electrochemical energy storage, domestic hot water storage, building envelope thermal inert storage and many other forms. Effective, safe and economical energy storage is essential for the efficient use of renewable energy. In order to cope with the huge demand of distributed energy storage, both “hard” energy storage technology and “soft” energy storage mode should be considered, as well as energy storage solutions for different application scenarios.  

Enhance the reliability of power supply to the grid 

Adding distributed power supply on the customer side, using the advantages of simple access and flexible regulation of DC microgrid, can effectively improve the reliability of electricity consumption, and with the peak and valley tariffs, demand response and other incentive policies, the cost of electricity consumption of customers can be reduced.

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