Photovoltaic substations

Photovoltaic box substation is referred to as photovoltaic substation, photovoltaic power generation professional substation, which is the application of box substation in photovoltaic power generation, a new type of energy. Over the years, China's photovoltaic, wind and other forms of power generation have increased, and the demand for related equipment has gradually increased.

Photovoltaic box substation is a new type of box substation (institute) that integrates photovoltaic power generation AC and DC system, inverter device, low-loss transformer and other control systems. It makes the AC and DC control system, inverter device, booster system, control system, etc. more organically combined, to achieve simplified configuration form, high reliability and flexibility, safe and convenient operation and maintenance, and at the same time has the advantages of environmental protection and energy saving, compact structure, etc., fully meeting the needs of photovoltaic power plants connected to the power grid.

Conditions of use of photovoltaic substations

The altitude does not exceed 1000m

The ambient temperature is between -25 °C ~ 40 °C

Relative humidity: daily average value is not more than 95%, monthly average value is not more than 90%;

Installation site: away from fire sources, explosions, conductive dust, chemically corrosive gases and violent vibrations. If the above conditions are exceeded, the user can consult the manufacturer.

Functions and features

The trinity of high-voltage switchgear, transformer and low-voltage switchgear is strong

Perfect high and low voltage protection, safe and reliable operation, simple maintenance

Small footprint, low investment, short production cycle, easy to move

It adopts double-layer (composite panel) structure, heat insulation, heat dissipation, ventilation, beauty, and high-level protection. The housing material is stainless steel, aluminum alloy, cold-rolled plate and colored steel plate

The high-voltage ring network cabinet can be equipped with a network automation terminal (FIU) with the "four remote" function, which can realize the reliable detection of short circuit and single-phase ground fault, which is convenient for the upgrade of the automated distribution network.

Transformers used

The substation adopts low-loss, oil-flooded, fully sealed S9, S10, S11 series transformers.

High pressure side

The high-voltage side generally adopts load switch-fuse combination electrical protection, after the fuse one phase is fused, the three-phase linkage trips, the load switch has compressed gas type, vacuum, sulfur hexafluoride and other types are optional, can be equipped with electric operating mechanism, to achieve automatic upgrade, the fuse is a high-voltage current limiting fuse, with impactor, reliable action, large breaking capacity. For transformers above 800kVA, ZN12, ZN28 can be selected. Vacuum circuit breaker protection such as VS1.

Low pressure side

The low-side main switch adopts universal or intelligent circuit breaker for selective protection. The outlet switch adopts a new molded case switch, which is small in size and short in arc, up to 30 circuits; Intelligent automatic tracking reactive power compensation device, there are contactor and contactless two switching methods for users to choose.