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FGI high voltage energy storage system case of photovoltaic power station in Lingtai County, Gansu Province

1.Project overview

Located in Lingtai County, Gansu Province, this project is an energy storage system equipment equipped with 100,000 kW photovoltaic agricultural composite photovoltaic power generation project. The photovoltaic power station is equipped with a new 110kV booster station and two 105MVA main transformers. The 110kV side adopts a single bus connection mode and connects to the 330kV substation with a 110kV overhead line coming east.

FGI high voltage energy storage system case of photovoltaic power station in Lingtai County, Gansu Province 1

The capacity of the photovoltaic power station supporting energy storage system is 5MW/10MWh. After the PCS converter, the energy storage battery is boosted to 35kV locally through the 35kV/10kV booster converter, and the 35kV side bus of the current 110kV booster station is connected to the 1-round 35kV collector line. This scheme adopts the combination scheme of high voltage direct hanging + 35kV/10kV boost voltage change of 10kV energy storage system.

FGI high voltage energy storage system case of photovoltaic power station in Lingtai County, Gansu Province 2

The energy storage system includes battery clusters of the energy storage system, PCS, EMS, supporting facilities in the container (including air conditioning, ventilation pipes, power distribution, fire protection, security, lighting, materials, etc., while considering fire and flame retardant requirements), cables and communication cables between devices in the energy storage container.

FGI high voltage energy storage system case of photovoltaic power station in Lingtai County, Gansu Province 3

2.Project characteristics

The 35kV step-down scheme is adopted, and the 35kV voltage is reduced to 10kV through the transformer, and then connected to the 10kV high-voltage reserve energy system.

FGI high voltage energy storage system case of photovoltaic power station in Lingtai County, Gansu Province 4

FGI high voltage energy storage system case of photovoltaic power station in Lingtai County, Gansu Province 5

 

This project has both economy and security, and finds the perfect meeting point in the underlying logic security and economy of the energy storage system.

Split phase single cabin design, with the perfect combination of capacity configuration and safety distance.

The capacity of single device is large, the power grid dispatching is simple, and the response speed is fast.

All battery clusters run in series without circulation.

3.Social benefits

The 5MW/10MWh energy storage system can solve the instability and volatility of photovoltaic power generation and promote the large-scale application of photovoltaic renewable energy. The energy storage system can actively participate in power grid regulation, store electric energy during the day, and discharge at night to participate in power system scheduling to relieve the nighttime pressure of the power grid. At the same time, the energy storage participates in the power market, helping to improve the efficiency of photovoltaic power stations. The project will run for 25 years, generate about 186 million KWH of electricity per year, reduce carbon dioxide emissions by about 170,000 tons per year, and save 57,000 tons of standard coal. Annual carbon dioxide emissions can be reduced by about 170,000 tons, and on the basis of achieving economic benefits, regional environmental quality can be effectively improved.

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