Designing Scheme of 25kw Solar Three Phase Energy Storage System

Designing Scheme of 25kw Solar Three Phase Energy Storage System

1.Specific functional requirements:

The project requires peak load shifting solution, mainly includes inverter, AC distribution box and communications systems, energy storage system, etc.

  •  At night, grid for battery charging
Designing Scheme of 25kw Solar1
  • During the day, the battery feeds the grid
Designing Scheme of 25kw Solar2
  • According to remote scheduling, control the power grid to charge the battery and discharge the battery to the power grid
Designing Scheme of 25kw Solar3
  • The charge-discharge power of the dual internal bidirectional inverter in the system is 25kVA, the DC terminal voltage of the system is DC800V, and the capacity is 100kWh
Designing Scheme of 25kw Solar4

2.Function Description:

  • Smart piconets specially designed for smart grids, accepting grid dispatching;
  • It can meet the needs of lead-acid batteries, lithium-ion batteries, super capacitors, and vanadium batteries for energy storage, and has a wide range of applications;
  •  Various battery charge and discharge modes can be set, such as bidirectional inverter, constant power charge and discharge, constant current charge and discharge, constant voltage charge and discharge;
  • It has the function of setting the working mode of the time period, and can set a reasonable working mode according to the characteristics of the local power grid:
  •  The two-way communication interface of the utility interface and the load interface realizes parallel operation and independent operation of the isolation network;
  •  Perfect island detection and switch off-grid mode mode switching, when the line suddenly loses power, the energy storage can automatically and seamlessly switch to the off-grid inverter working mode, separate from the large power grid, and establish a micro-grid to operate independently;
  •  RS485, Ethernet and CAN bus communication interfaces are optional to realize remote monitoring;
  • Optional smart grid main control system, which can realize interconnection with photovoltaic grid-connected inverters, wind power, tidal energy system interconnection systems, diesel generators, etc., to form a hybrid energy smart grid, and can realize multiple networking modes .
  • Energy storage can cooperate with the power grid dispatching system. According to the characteristics of the peak and valley loads of the system, excess power generation is stored in the low valley area, and the energy stored in the battery is released when the load is in peak load, thereby reducing the peak-valley load difference of the power grid. , to reduce the power supply burden of the power grid, and realize the peak value of the power grid to strip off the peak load shifting;At the same time, the peak-to-valley price difference is used to improve the economic benefits of power utilization;
  • When the power grid needs to be maintained and repaired, the energy storage inverter can realize the planned island operation, independently and uninterruptedly supply power to important loads, and ensure its safe operation.

3.Application field

  • Application in Smart Grid

The bidirectional energy storage inverter can realize the integrated operation of internal power supply and load, and through coordinated control with the main grid, it can be smoothly connected to the main grid or run independently, fully meeting the user’s requirements for power quality, power supply reliability and security Require

  • Applications in stand-alone microgrids

The independent micro-grid system is mainly used in islands, remote areas and local power grid systems established due to unstable power supply.

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