With the advent of summer, fire accidents occur frequently, and photovoltaic power station are no exception. According to statistics, more than 80% of fire accidents in photovoltaic power stations are caused by faults on the DC side. The DC short circuit in the , the quality problem of the DC distribution cabinet, and the fuse problem are one of the reasons for the fire, especially the DC arcing problem. Because there are thousands of joints in the entire photovoltaic power station, any poor contact may cause a DC arc, and an arc will cause a fire. So how can a photovoltaic power station prevent fire accidents from happening?
The equipment with greater fire hazards in photovoltaic power stations includes combiner boxes, inverters, batteries, connectors, power distribution cabinets, and transformers, which are prone to electrical fires. The main buildings in the photovoltaic power station are integrated control rooms and substations. For substations with a voltage above 35kV and a single transformer capacity of 5000kVA and above, the fire protection design should be implemented in accordance with the specifications. When the cable sandwich cable adopts Class A flame-retardant cable, the building disaster risk of the photovoltaic power station can be Class D; when the integrated control room does not take measures to prevent the cable from extending after fires, its fire risk should be Class C. The power distribution equipment building and outdoor power distribution equipment determine the fire hazard according to the oil content of the equipment.
The fire separation distance between the buildings inside the photovoltaic power station and the buildings, storage yards, and storage tanks outside the power station shall comply with the regulations. The fire lanes in large and medium-sized photovoltaic power stations should be arranged in a ring shape. When photovoltaic modules receive radiation, they generate voltage. The photovoltaic array is connected in series to form a high-voltage direct current. If it accidentally forms a loop with the human body, it will cause a major safety accident. Generally, the PV array must be kept disconnected before connecting to the system and must be connected when the combiner box is closed after connecting to the system. During the construction process, the photovoltaic modules need to be shielded. When the shielding is difficult, the construction personnel should be equipped with safety protection equipment to ensure the safety of the personnel.
If you want to learn more, please visit our website Slip Rings Purpose, Induction Motor Price, Ac Motors Manufacturer.