Maintenance method of DC power supply of power communication inverter

The power communication inverter is the basic method of power enterprise production and management, and an important part of the safe operation of the power grid. The power communication DC power supply is to ensure the normal operation of communication equipment and the basis for smooth communication. It is the "heart" of power communication. The failure of the communication DC power supply will cause the power supply of the communication equipment to be interrupted, causing the communication circuit to be interrupted, and the important information cannot be transmitted normally. In recent years, the continuous expansion of power grid scale and the progress of modern communication technology have greatly promoted the rapid development of power communication. With the continuous improvement of the overall level of power communication and the continuous update of communication equipment, DC power supplies for power communication have also been proposed. Higher requirements, so doing a good job in the maintenance of the power communication DC power supply is of great significance, which directly affects the safe and stable operation of the power communication network. Since the current DC power supplies of power communication inverters all use high-frequency switching power supplies and valve-regulated sealed lead-acid batteries, this has brought a lot of convenience to the maintenance of the power system, but in terms of maintenance, pay attention to the operation and maintenance points. Maintenance work can truly ensure that the power communication DC power supply can reliably, stably and discontinuously supply power to the communication equipment.

①The state of the lightning arrester used for the AC input of the power supply should be checked when stopping the patrol and maintenance of the power supply, especially during thunderstorms, and should pay attention to checking the status of the arrester, and change it in time if any problems are found, such as when the OBO lightning protection module is found to be faulty When the color of the display window changes from green to red, it is necessary to stop changing the lightning protection module to ensure that it can exert its lightning protection effect when a lightning strike occurs. It should be noted that there is a certain leakage current in ordinary zinc oxide arresters, which are easy to age after long-term use, resulting in performance degradation. Therefore, even if there is no lightning strike for a long time, the replacement should be stopped regularly to ensure its lightning protection effect.

②Under normal operating conditions of high-frequency switching power supply, the maintenance workload of the rectifier host is very small, mainly dust-proof and regular dust removal, otherwise the fly dust and humidity will cause the host to work disorder, and the dust will also affect the heat dissipation of the device. . Generally, the host should be thoroughly cleaned once a quarter. When removing dust, check whether the connectors and connectors are loose or not in firm contact.

③The parameters set in the communication high-frequency switching power supply cannot be changed arbitrarily during use.

④ When using the communication high-frequency switching power supply, care should be taken to prevent additional equipment with high power at will, and long-term operation under full load is not allowed. Since the communication DC power supply is running in a discontinuous state, adding high-power load or working under full load may cause the rectifier module to malfunction, which will damage the entire power system in severe cases.

⑤ The maintenance work of the battery pack as a backup power supply occupies a very important position in the maintenance work of the power communication DC power supply, which is also a difficult point in the maintenance of the power supply. Since the valve-regulated sealed lead-acid batteries used today have completed the sealing, it eliminates the work of measuring ratio, proportioning, and adding distilled water to the lead-acid batteries in the past, which greatly reduces the maintenance workload. Therefore, some maintenance personnel regard it as maintenance-free The battery is not maintained during use, and left alone, resulting in improper maintenance and problems. In the maintenance of valve-regulated sealed lead-acid batteries, the following issues should be paid attention to:

　　 Regularly check the float voltage of the entire battery pack. If the float voltage exceeds the request of the battery pack, the adjustment should be stopped. Too high a float voltage will increase water loss and accelerate the corrosion of the battery's front grid, which may seriously affect the life of the battery; if it is too low, the battery may not be fully charged. For a single battery, its floating charge voltage should be recorded once a month. If the voltage exceeds the manufacturer's index, check the trend of non-uniformity after a few months, and contact the manufacturer to stop the disposal.