What protection measures does the photovoltaic prefabricated substation device have when dealing with grid fluctuations and faults?
Publish Time: 2025-04-03
In the power system, grid fluctuations and faults are inevitable problems, and they may pose a serious threat to the stable operation of the power system. However, the photovoltaic prefabricated substation device provides all-round protection for the power grid through a series of careful designs and advanced protection technologies, ensuring the stable operation of the power system.
The photovoltaic prefabricated substation device has excellent overcurrent protection capabilities. When an overcurrent phenomenon occurs in the power grid, that is, when the current exceeds the rated value of the equipment or line, it may cause serious consequences such as equipment damage or fire. For this reason, the photovoltaic prefabricated substation device has a built-in overcurrent protection device. When an overcurrent phenomenon is detected, the device quickly cuts off the circuit to avoid damage to the equipment and lines caused by excessive current.
Short circuit protection is another important protection function of the photovoltaic prefabricated substation device. In the power grid, short circuit is a common form of fault, which can cause a sharp increase in current and pose a serious threat to equipment and personnel. By installing a short-circuit protection device, the photovoltaic prefabricated substation device can quickly cut off the fault circuit when a short-circuit fault is detected, thereby avoiding the damage of the short-circuit current to the equipment and lines.
In addition to overcurrent and short-circuit protection, the photovoltaic prefabricated substation device also has a grounding protection function. Grounding protection is a protective measure set to prevent the metal casing of electrical equipment from being electrified. When a leakage or grounding fault occurs in the equipment, the grounding protection device will quickly cut off the fault circuit to prevent the current from passing through the human body or other conductive objects and causing electric shock accidents. The grounding protection device of the photovoltaic prefabricated substation device is reasonably designed to ensure rapid response when a grounding fault occurs to protect the safety of personnel and equipment.
In addition, the photovoltaic prefabricated substation device also has voltage protection and frequency protection functions. Voltage protection can monitor changes in grid voltage. When the voltage exceeds the rated voltage range of the equipment or line, the protection device will take action, such as cutting off the circuit or adjusting the voltage, to protect the equipment and lines from damage. Frequency protection is used to monitor changes in grid frequency. When the frequency exceeds the normal range, the protection device will respond quickly to ensure the stable operation of the power system.
It is worth mentioning that the protection system of photovoltaic prefabricated substation equipment usually also has a fault warning function. By real-time monitoring of the operating status of the power grid and equipment, the protection system can detect potential faults in advance and issue warning signals, so that operation and maintenance personnel can deal with them in time to avoid the expansion of faults.
In summary, photovoltaic prefabricated substation equipment has comprehensive protection measures when dealing with power grid fluctuations and faults. These protection measures not only ensure the safe operation of equipment and lines, but also improve the stability and reliability of the power system. With the continuous development of science and technology, the protection technology of photovoltaic prefabricated substation equipment will continue to upgrade and improve, providing a more solid guarantee for the stable operation of the power system.
