In order to deal with the hidden dangers of electricity safety, photovoltaic prefabricated substation builds a basic safety line of defense from the perspective of insulation protection. The electrical components and lines inside the substation are all wrapped with materials with high insulation performance. Key equipment such as transformers and switch cabinets use special insulating shells, which not only have good insulation properties, but also effectively prevent the invasion of external water vapor and dust. The outer layer of the line is wrapped with multiple layers of composite insulation materials to form a dense insulation layer to avoid the risk of leakage due to aging and damage of the line, and reduce the possibility of safety accidents caused by current leakage from the source.
The careful design of the grounding system is an important measure to ensure the safety of electricity use. The photovoltaic prefabricated substation is equipped with a complete grounding device, which is connected to the electrical equipment in the substation through a grounding electrode buried deep underground. When a leakage fault occurs in the equipment, the strong current can be quickly introduced into the earth through the grounding system to avoid electric shock and equipment damage. The grounding electrode is made of a special corrosion-resistant material. Even if it is in a complex underground environment for a long time, it can ensure good conductivity, ensure that the grounding system is always stable and reliable, and lay a solid foundation for safety protection for the substation.
Lightning protection measures provide strong protection for substations to resist the threat of lightning strikes. Lightning rods or lightning strips are installed on the top of the substation. These lightning protection devices can lead lightning to themselves and safely lead lightning current to the earth through lightning protection down conductors. At the same time, lightning arresters are also installed inside the substation to suppress the impact of lightning intrusion waves on electrical equipment. The lightning arrester can respond to overvoltage instantly and limit it to the range that the equipment can withstand, preventing lightning from damaging key equipment such as transformers and circuit breakers, avoiding fires or equipment failures caused by lightning strikes, and ensuring the safety of electricity use in substations in bad weather.
The protection design of electrical equipment further enhances the safety of substations. Transformers, distribution cabinets and other equipment are set up in independent enclosed spaces, and the cabinet doors are protected by locks to prevent unrelated personnel from touching the internal live parts at will. Obvious warning signs are set on the surface of the equipment to remind operators to pay attention to safety. At the same time, electrical equipment also has a complete protection level, which can effectively prevent dust, water, and foreign objects from intruding, avoid equipment failures or leakage due to external factors, and ensure that the equipment can operate safely and stably under various environmental conditions.
The intelligent monitoring system provides real-time protection for the power safety of substations. Various sensors are installed in the substation to monitor the operating parameters of electrical equipment in real time, such as voltage, current, temperature, etc. Once abnormal data is detected, the system will immediately issue an alarm and transmit the information to the monitoring center through the communication network. The operation and maintenance personnel can timely troubleshoot the fault according to the alarm information to avoid the expansion of safety hazards. The intelligent monitoring system can also evaluate the status of the equipment, predict the possibility of equipment failure, take maintenance measures in advance, and eliminate safety hazards in the bud.
Fire prevention and explosion prevention measures are key links to ensure the safety of substations. The interior of the substation is decorated with flame-retardant materials, and fireproof partitions and sealing materials are set in cable trenches, equipment interlayers and other parts to prevent the spread of fire. In areas where flammable gases may be generated, gas leak detection devices are installed. Once the concentration of flammable gases is detected to exceed the standard, the ventilation system is immediately started and an alarm is issued. At the same time, the substation is also equipped with fire extinguishing equipment and automatic fire extinguishing systems, such as dry powder fire extinguishers and heptafluoropropane gas fire extinguishing systems, which can quickly extinguish fires when fires occur and reduce the harm caused by fires to equipment and personnel.
Operation and maintenance management is also an important aspect to ensure the safety of power use in substations. Establish a strict operation and maintenance management system, and regularly inspect, maintain and test substation equipment. Operation and maintenance personnel must undergo professional training, be familiar with the operation and maintenance methods of the equipment, and strictly abide by the operating procedures. Establish equipment files to record the operating status, maintenance status and fault handling process of the equipment to provide a basis for the management and maintenance of the equipment. Through scientific and standardized operation and maintenance management, safety hazards can be discovered and eliminated in a timely manner to ensure the long-term safe and stable operation of photovoltaic prefabricated substations.
