The communication power supply plays an important role in the overall communication equipment room. In the face of new developments such as telecommunications splitting and personnel reorganization, newer and higher requirements are placed on power supply maintenance and management.
The rapid development of telecommunications and the update of product technology in the past decade have made the current communication equipment present new features of large network scale, high degree of intelligence, complicated brand series, unattended, and high degree of centralized monitoring. The reorganization of personnel and the advancement of professional career have made the development of maintenance human resources and technical force lag significantly behind the development of communication equipment, the dependence of maintenance personnel on manufacturers has increased, and the risk of loss due to equipment failure has increased. As the heart of communication equipment, the communication power supply should also face newer and higher requirements for maintenance and management in the face of new situations. After several years of exploration, the author actively communicated with brother units and power supply manufacturers, accumulated some experience, and put forward some exploratory methods on how to better do the maintenance and management of power supply equipment under the new situation.
Choose a power brand based on management goals
The current power equipment brands are complex. According to the performance indicators stipulated in the network inspection standards, each equipment is similar, but the structure, user-friendly design, intelligent monitoring, regional / specific environmental solutions, and after-sales service guarantees vary widely. Improper selection of these branded equipment will disperse the maintenance resources and weaken the strength. It is difficult to deepen the maintenance work and it is difficult for the after-sales service to obtain manufacturer protection.
According to the management objectives, follow the principles and priorities of "guaranteed reliable operation, controlled condition monitoring, shortened maintenance time, and reduced costs" to conduct inspection and screening of brands and equipment. The number of preferred brands is preferably not more than 3, in order to benefit technical personnel To improve the technical level, the equipment has a certain scale, and it is easy to obtain better after-sales service conditions; at the same time, the equipment of the same brand is arranged to be used in the same area as much as possible, so that the maintenance personnel can perform maintenance in a single and in-depth manner.
Investigation and execution of preventive work
Preventive work runs through the entire process of equipment selection, installation and maintenance.
Before selecting equipment, the working environment of the equipment (including geographical conditions, climatic conditions, mains environment, duty conditions, supporting systems, etc.) and the adaptability of the selected equipment to the working environment should be investigated in advance. Practice has proved that the function and performance of some equipment may not be suitable for all conditions. The failure rate of the same equipment in different working environments will be very different. Therefore, before selecting equipment, be sure to conduct an investigation of your own environment, analysis of the selected equipment, and extensively listen to the investigation opinions of the specific use of other local telecommunications departments. Non-applicable functions should be removed or shielded; important indicators , If necessary, you can make corresponding tests, and even try it on the experimental network or non-important bureaus.
Installation and acceptance work is also a key point of preventive work. After passing the inspection and passing of the qualified products of the manufacturer, after multiple transfers and bumps (especially in mountainous areas), internal and external electrical contact may loosen and fall off at the installation site; factory parameter settings It may not be consistent with the actual situation, these will become hidden troubles in future operation. Eliminating and correcting these factors during installation and acceptance will provide the necessary guarantee for the reliable operation of the equipment in the future.
In basic management work, first of all, it advocates active maintenance and preventive maintenance to eliminate the signs of failure. Through annual special management and labor competition actions, such as "preventing power supply equipment before the peak of summer power supply", "strengthening the maintenance and pre-preparation of power supply equipment after the peak of summer power supply, and improving the integrity of equipment", self-examination , Mutual inspection, comparison and communication, training maintenance technical team, improving the enthusiasm of maintenance personnel, and improving the quality of equipment maintenance management. At the same time, make full use of various monitoring methods, find faults early, and then concentrate technical force to deal with them at the fastest speed to compress the duration of the fault. For the faults that occur for a long time and have a long troubleshooting time, which will interrupt the power supply, an emergency response plan should be formulated and drills should be regularly strengthened.
Building a graded support system
At present, the maintenance resources of telecommunication systems are slightly weaker than the total equipment operation. Some equipment maintenance contractors have not been able to solve and eliminate various faults in a timely manner. In this case, within the prefecture-level city or the province-wide scope, establish a hierarchical technical support system that includes technical expert groups, technical backbone teams, and daily maintenance personnel, and include manufacturer technical personnel into it. The implementation of hierarchical technical support for the step-by-step and real-time reporting process will be of great significance to the maintenance and guarantee of the power supply.
Within the scope of the support system, the investigation of typical faults, the classification and statistics of various faults (such as quality, external causes, negligence, etc.), and archiving of data archives, information resource sharing and other measures will help maintain the team ’s technology. Rapid improvement provides a good platform.
Rational configuration of power supply system
The rational configuration of the power supply system must pay attention to the following points:
(1) In the AC power supply system, the automatic switching device is gradually promoted, and it has a mechanical manual switching function for emergency use. In the large-capacity (over 2000kVA) AC power supply system, it is recommended to use two sub-power supply systems (transformer and oil machine) to supply power separately. The sub-power supply system uses a liaison cabinet as a backup for each other. Important sites (such as hub offices, data centers, IDC centers, etc.) should strive to introduce two high-voltage lines of different substations to improve the reliability of power supply. Since large-capacity low-voltage circuit breakers generally do not leave spare parts, once damaged, the cause of the fault and the maintenance time are longer, the emergency plan should be started in time to use temporary cables to connect the temporary power supply (to eliminate short-circuit factors), to avoid the lack of time, resulting in The event of the battery shining occurs.
(2) The capacity of a single set of high-frequency switching power supply should not be too large. The number of power module start-ups should be determined according to the environment and fault conditions. For stations with overall destructive factors (such as mains overvoltage), the number of start-ups should not be large. The battery charging current is limited to 0.1C10. The rated current of the DC fuse should be no more than twice the maximum load current to ensure that the fuse blows in time when the load is short-circuited, so as not to affect the output voltage of the entire DC power supply system.
(3) Large-capacity UPS is the difficulty of power supply maintenance management. The network should prefer the "N + 1" parallel mode. The maintenance department must be involved throughout the design, review and installation, and pay attention to the following issues: UPS main road and side Road power supply is best powered by two air switches separately; too high zero-ground voltage of the UPS will cause an increase in the packet loss rate of the network data, so measures should be taken to reduce the zero-ground voltage of the UPS output to less than 1V; 2V valve-regulated sealed battery; for UPS equipment, focus on important indicators such as input power factor and harmonic content, especially coordination with the oil machine, the ratio of oil machine capacity to UPS capacity should be more than 2 times to ensure oil The machine and UPS can work normally.
(4) As a backup power source, the diesel generator set should ensure a good backup state. The telecommunication system selects the rated capacity of the oil engine to generally use the standby power. When using it, it should be controlled within 1h with full load, and 90% of the standby power should be used for long-term operation. The ratio of engine power to generator should be at least 1.1. The generator prefers permanent magnet and DVR models, which can effectively avoid harmonic interference of the load. At the same time, it is necessary to ensure that the oil machine can fully play its role. The design must consider the automatic switching between the oil machine and the commercial power supply. There must be electrical interlocking, consideration of the oil machine room ventilation, smoke exhaust, shock absorption and noise reduction. Test machine, often check the start battery and automatic oil pumping system, etc.
(5) The storage battery is the core of the backup power supply on the telecommunications network. According to the requirements of the maintenance regulations, a set of operating procedures for battery capacity testing and verification capacity testing should be drawn up, and the battery capacity testing equipment should be customized and purchased, including battery capacity tester, mobile dummy load, mobile charger, battery list Body activation instrument, and equipped to various regional maintenance stations. In the future, the Fuzhou local network will gradually conduct capacity tests and verification tests on the batteries on the Internet, hoping to eliminate the hidden troubles caused by the batteries. Aiming at the problem that the battery of some access points is often discharged with a small current for a long time, it is easy to cause the problem of backward batteries. It is advisable to adjust the settings of the automatic equalizing float charge of the rectifier, adjust the number of rectifier modules to start, and regularly conduct capacity tests. ideal.
The management of communication power supply should be continuously explored and improved based on technological development, management development and practical feedback. The ultimate goal is to continuously improve the management work and improve the reliability of equipment operation.
1.6 years product warranty (material and workmanship), 25 years module power output warranty
2.Industry leading plus only power tolerance: 0+3%
3.Strong framed module, passing mechanical load test of 5400Pa to withstand heavier snow load 4.17% conversion efficiency,reducing installation costs and maximizing the kwh output per unit area.
Polycrystalline Solar Panel,Poly Panel,Poly Solar Panel
Yangzhou Beyond Solar Energy Co.,Ltd. , https://www.ckbsolar.com