A voltage sag can be understood as a sudden drop in voltage followed by a short return to normal. So how to deal with the phenomenon of voltage sag? First of all, we should deal with it from the three aspects of generating voltage sag and causing harm. The voltage sag is generally a problem of the power supply system, and it is generally the equipment manufacturer and the real user who are harmed and affected by the voltage sag. The coordination of these three is needed to successfully control the voltage sag. reach the normal operating state of the equipment. Greatly reduce the many hazards caused by voltage sags.
To put it simply, usually due to a fault in the power supply line, the number of voltage sags will increase. Therefore, we should reduce the number of failures and reduce the time for troubleshooting, and improve the stability of the operation of the power supply system and the operation of power equipment. By rationally optimizing the structure of the power supply system, the stable output of the power transmission and distribution system is enhanced. At the same time, install various power conditioning devices, such as between the various interfaces of the system and equipment. Finally, cooperation between equipment manufacturers and users is required to improve the equipment’s ability to withstand voltage and reduce the harm caused by voltage sags.
For the problem of power supply system. First of all, the voltage sag problem is usually caused by various faults on the lines of the power supply system (most of them are short-circuit problems caused by small capacitance of local lines). At the same time, the time to solve the fault is too long, and no reasonable power supply method is provided for real users. Especially for the frequency of voltage sags in some areas is relatively frequent and the duration is too long, usually the power supply system should be checked first. In general, in order to change the problem of voltage sag, it is usually necessary to add more lines and distribution equipment. This will greatly increase the input cost, which requires the power supply department to accurately monitor the voltage quality. Provide data support for subsequent increase in equipment sensitivity and resolution of equipment sensitivity issues.
For equipment manufacturers, the normal operation and work of equipment requires a reasonable working environment. By reducing the sensitivity of the used equipment to voltage sags, misoperations from automation or semi-automation can be reduced to a certain extent. This allows electrical equipment to have a certain ability to resist voltage sags. At the same time, if the voltage sag is directly caused by the start of a large motor, we can change the hard start to soft start or increase the short-circuit capacity of the common connection point to solve this problem.
For actual users. This requires the installation of compensation devices between user equipment, such as solid state switches, uninterruptible power supplies, dynamic voltage restorers, etc.
Only the three fit together. In order to obtain a more ideal voltage power environment.
Post time: Apr-13-2023