How to maintain and manage power communication

　 In recent years, in order to meet the demand for stable, efficient, safe production of electric power systems and marketization of electric power companies, the electric power communication industry has developed rapidly and new communication systems and communication equipment have been put into use. The influx of new equipment systems on the one hand continues to promote the intelligent development of communication networks, which can lead to the insufficiency of power supply systems, optical fiber equipment, and integrated management systems. These are all proposed for the development of modern electric power communication. Challenges, there are a lot of problems that need to be solved urgently.

1. Importance of maintenance of communication power system
The power communication system is the premise basis for the realization of modernization of power grid management and dispatch automation, and it plays a key role in the stability, safety, and economic operation of the power grid. In the entire power communication system, the operational quality of the communication power system directly relates to the safe and reliable operation of the entire power communication network. It is self-evident that the maintenance and management of the power communication system are important.

2, power communication power system maintenance management steps
The maintenance of the communication power system is first and foremost the maintenance of the communication power supply equipment. The first step in maintenance must be to establish a sound operation and management mechanism, ensure the regular inspection of equipment through the routine maintenance system, and make early detection, early prevention, and repair of accidents. The use of modern networks and local control systems for real-time system information viewing, through the power engineering experience and theoretical analysis of various information expressed by the power system operating conditions. The annual electrical connection of the equipment is checked. In particular, the check of the connection of the important diameter of the cable and the air switch with the larger diameter and the connection of the air switch with the battery must be properly arranged. Routine inspections should be performed to ensure that the grounding cable is connected to the rack and the integrity of the varistor is checked, and the varistor integrity, anti-surge suppressor module window display, and thunderstorm equipment operation check are performed. In the process of equipment maintenance during the discovery of problems, one person must not operate independently. At least two people must work together. Cut off the power supply first, and then enter the high-voltage protection fence. Do a good job of protection during the operation. During the maintenance, issue a maintenance notice. After the maintenance, complete the warning board. Can only be removed by the relevant person. UPS equipment maintenance work must ensure that all kinds of automatic protection functions and alarm functions are normal, regularly check the UPS automatic work instructions, bypass performance and fault indication, the UPS battery should also be periodically discharged under the condition of reliable power supply, guarantee the service life. In general, the most important thing in the maintenance work of AC power distribution equipment is the regular maintenance of various indicators and timely elimination of possible hazardous conditions.

3, power communication maintenance and management technology examples
A power telecommunication company has been monitoring the power plant to reflect that there is a number in the station. The direct-control power plant has a set of administrative telephones, a set of dispatch telephones, and the former is a problem. The administrative bureau of the problem board is installed in the administrative building of the headquarters and the extension uses the Marconi C-MUX2 (PCM) to send to the direct-control power plant via the optical transmission system. The busy tone was found when dialing the fault number. The personnel on duty on the power plant directly reflected that the other services of the same optical transmission system were normal, and the dispatching call was normal. It was initially suspected that the line was short-circuited or the PCM was faulty. Measure the voltage of the telephone line corresponding to the number on the switch-side audio distribution frame. If OV is not near the normal value of 45V, a similar circuit is short-circuited. Disconnect the connection between the switch and the PCM. The number is restored to normal. Exclude the switch. This indicates that the fault occurred outside the switch. At this point, try to directly adjust other administrative extensions in the power plant and find that all of them are busy. Measure the line between the exchange and the PCM to be OV. The initial judgment is PCM failure, or it is impossible to confirm where the PCM in the direct-adjusting power plant and the main unit has failed. Check the status of the PCM through the terminal login and find that the port of the switch board is disabled instead of the normal idie, and the 2M information display signal is lost, and the check of the LTU board also shows that it does not exist. Insert and remove the MCC board device to find the LTU board, 2M information shows CRC error, other fault information remains, check the SMA device connected to the upper level of the SMA device, there is no 2M alarm, so it is presumed that there is no problem with the connection between the PCM, so it is still Think of a PCM failure. Record the PCM configuration data, plug and unplug the CSC card and reconfigure the data. Observe that the fault persists. The fault information will not change. Asked the manufacturer technical staff to get no specific reason to answer, they think it may be 2M is not normal, should solve the 2M problem and solve the phone problem. According to the operating requirements, the PCM performs hardware loopback on the LTU board and finds that the 2M alarm information disappears. The port status of the switch board is idie. The audio distribution frame is facing the original trouble number and a telephone, there is a dial tone machine, so when the PCM is in a loop state, can not dial test, but according to the existing phenomenon can be inferred PCM failure has been eliminated, the equipment is normal, the problem actually occurs In the 2M line. The NMS assisted in checking the status of the 2M link and informed that the cable was cut off due to the construction of the line. The entire problem may be related to this. The personnel on duty in the direct-connected power plant were informed that the telephone failure time was roughly in line with the construction time, and the problem was determined at this point.

After the analysis: SDH optical transmission system should be accurately determined according to the principles of fault location The specific principles are mainly four aspects. First, the first external, after the transmission, in the positioning of the fault, you should first eliminate the external possible factors, including broken fiber, exchange-side failure. Second, the first single station and the latter single board. When positioning faults, it is necessary to accurately locate which station, and then locate which board of the station. Third, the first line and the rear line, when positioning faults, it is well known that the failure of the circuit board often causes an abnormal alarm of the tributary board. Fourth, the first is advanced, and the latter is low. First, the group road alarm analysis is excluded, and then the branch route alarm analysis is performed. That is, the high-level alarms that seriously affect the communication are processed first, including critical alarms and major alarms, and then the low-level alarm processing. .

4 Conclusion

The development of the new era requires that all power companies pay close attention to the development and introduction of new equipment and new network management systems, make full use of high-tech technologies to enhance their own advantages, and solve the operational problems of power communication and optical fiber cable maintenance and management through comprehensive measures, and improve the overall efficiency of enterprises. .