Application background: The industrial and commercial optical storage microgrid system can fully and effectively exert the potential of distributed clean energy, smooth the random fluctuation of output, improve the power prediction accuracy, reduce the impact on the power grid, improve the quality of power supply and the reliability of independent power supply, and ensure the safe operation of the power grid. It is a useful supplement to the large power grid. In addition, energy storage can also store excess power generation, increase the proportion of spontaneous self-consumption, and play the role of "shaving peaks and filling valleys".

Applicable scenarios: industrial and commercial parks, isolated islands, power shortage areas in Asia, Africa and Latin America

Scheme 1: Common DC bus scheme:

Distributed power sources, energy storage devices, loads, etc. must be connected to the DC bus

Features:

Ø Suitable for power within 30kW to 200kW, both isolated grid and grid-connected operation;

Ø DC coupling, reducing the conversion loss of the converter and improving the overall efficiency by at least 3%;

Ø High permeability of each part to achieve refined control;

Scheme 2: AC-DC hybrid bus scheme

There are two kinds of busbars, AC and DC. Distributed power sources, energy storage devices and loads are respectively connected to the busbars of the same power supply system.

Features:

Ø Suitable for applications within 200kW to 5000kW, both isolated grid and grid-connected operation;

Ø It combines the characteristics of high permeability, high efficiency and large capacity of the common AC bus in each part of the common DC bus;

It has the characteristics of flexible and diverse structure, high load density, and complementary advantages of AC and DC buses;