Photovoltaic power plant development to today, the use of desert, saline, mountainous areas and other poor address conditions for photovoltaic power generation, can be a multi-benefit thing. But once there is a failure, and because of the poor conditions, it is also troublesome to deal with. That's why good equipment maintenance and reducing breakdowns is the top priority, especially for larger-scale power plants.
These are the wrong ideas that will make your power station work twice as hard.
Thinking that equipment maintenance is irrelevant
Many years in the industry, to now serve as station manager duties, the biggest feeling is that many people, especially new practitioners in the industry, the most likely to produce a misconception that the need for regular inspection and maintenance is not much, simply look on the line, anyway, equipment abnormalities will have a system alarm, will automatically trip offline, when the time to deal with the line. Such an idea will only lead to frequent failures, tired of coping.
The flip view as a passing scene
With the application of information technology integrated system, the management of power station efficiency has improved a lot. The centralized control system will provide a lot of categories of information, and some colleagues will habitually focus only on the part of the abnormal warning, no warning data information on the negligent view of the record, which is also wrong, the centralized control platform is a comprehensive grasp of the power station condition of the magic weapon, only as an alarm to use, is a huge waste.
Treat maintenance work as a small fuss
Daily operation and maintenance work is a very important part of the equipment inspection and maintenance, the same work, some colleagues do not enough in place, such as whether the bolt is tethered tight, temperature measurement and so on are simply skipped, only focus on the ash cleaning such "immediate" work, other casual do just fine, such ideas are also seriously wrong This is also a serious mistake. If you do maintenance work in this way, you are not doing it.
Wait until the power outage to do everything
In the photovoltaic power plant equipment maintenance work, regular inspection, monitor the disk is timely detection of equipment abnormal working condition, eliminate the important work of equipment accident potential. Equipment outage maintenance, is the best opportunity to eliminate defects, dealing with hidden problems, but this is misunderstood by many people, the daily inspection and maintenance work, all dragged to the outage maintenance before the unified treatment, maintenance can be dragged, the fault accident can not wait for you.
Professional first, down to earth to do every maintenance work
Adjust your own cognition and have a scientific judgment on equipment maintenance, the key is still in the daily work, in accordance with the concept of the beginning to end to carry out. The following is to share some experience from the perspective of daily operation and maintenance work and maintenance methods of several major equipment.
Daily operation and maintenance work
More walking - regular inspection is very important
Regular inspection is originally within the scope of work responsibilities, is essential, the key is to develop a reasonable inspection cycle, the combination of walking, listening, seeing, smelling, touching, measuring, can timely find equipment abnormalities, such as high cable head temperature, each indicator error, broken components and other abnormalities, to avoid entering the "fire department" type of accident processing Odd circle. In the actual work, rather than slow down a little, but also to bring up the quality of inspection.
Diligent testing - data records can not be missing
Our central control system, the operation of the entire station facilities and equipment are recorded, we need to staff in the daily to regularly, on time to check the records. More attention should be paid to those, although not by the system warning, but the relevant operating data have fluctuations in the part of the change, you can first external view through video monitoring, if necessary, you need to adjust the maintenance plan of the facilities, the field to go to the maintenance and repair.
Run training - solid technology is reliable
Regular technical training of personnel, including safety regulations, operation regulations, inspection regulations, technical principles, etc., to enhance the technical level of personnel. Special attention should be paid to the knowledge of equipment principles and maintenance in addition to essential, our daily knowledge of how to judge the operation of equipment, how to replace equipment components, how to clean electrical equipment, also need to be reflected in the training, only when the technical level of personnel improved, can timely find equipment hidden problems, the correct handling of equipment abnormalities.
Important equipment maintenance inspection
Through the current equipment maintenance volume, the maintenance demand of photovoltaic modules and convergence box is relatively large, and the daily defects are also concentrated in these two types of equipment. Some of the more common abnormalities, like module breakage, MC4 plug overheating damage, converter communication main board damage, branch insurance fuse, branch cable grounding, etc., we have to target technical processing, otherwise the development of equipment failure, it will seriously affect the power generation efficiency and cause greater accidents.
Busbar maintenance
For the busbar, we first need to know how to judge the health condition of the equipment through the monitoring system and analyze whether the change of data is within the normal interval. The warning of the system is generated after the abnormal appearance of the fault, our maintenance work, we need to rush before the abnormal warning, in advance to determine the possibility of error, timely go to the maintenance and adjustment.
Check the branch circuit current and insurance status, if there is a current of zero, it is necessary to check whether to replace the insurance.
Reinforce the string MC4 plug, determine whether there is a heat situation, if so, in order to avoid the plug heat burn, then you need to replace the new plug.
Check whether the branch cable is complete, clean up the foreign matter around the cable, such as the open circuit state in which one pole to ground voltage is zero or a smaller fixed value, this situation should be grounded a pole to stroke the line, timely repair the broken insulation layer.
Check the input and output terminals of the busbar box for discoloration and blackening and reinforcement work, and replace the terminals and cable heads in time for serious aging conditions.
Clean the dust and sediment on the inner wall of the busbar, check whether the base is hot and discolored, especially the newly put into production facilities should pay extra attention to the heat generation, clean and reinforce the relevant heat dissipation facilities.
Maintenance of components
Check and reinforce all kinds of wiring and fixing facilities between components and brackets. Inspect and clean the surface of modules for damages and hot spots.
Check all PV modules, cables, electrical equipment and grounding, clean the debris on the outside of the insulation layer, and replace new cable sections or seal and reinforce with insulating tape in time if there are signs of aging.
In the case that the degree of bracket rust is light and does not affect the stability of the bracket, rust removal treatment is carried out on the part with rust, repainting the anti-rust layer, and patch welding reinforcement or overall replacement is required for the degree of corrosion affecting the stability of the facility. Maintenance of inverter
Compared with the components and sink box, the inverter has a complex structure, many components, complex working principle, relatively poor reliability, and the maintenance work is more onerous.
Daily records closely observe the operating data such as voltage and current. Most of the potential problems are intuitively fed back at the data level, and there are certain differences in different component series that need to be taken into account.
For each maintenance cleaning, the condition of the exhaust system of the inverter facility should be attended to, and the interface cables of the exhaust facility should be cleaned and reinforced. Those with abnormal exhaust air should be dealt with immediately, regardless of whether there is a problem with inverter operation.
Equipment maintenance, sometimes, is actually considered a test of responsibility. Unlike the handling of equipment failure, the work content is clear and easy to evaluate, whether the maintenance work is in place and whether it is done in a practical manner, it is not so obvious at the moment, so there are so many formalism and go through the situation. But at the same time, the equipment maintenance is the most effortless in the battles to keep the power generation, just one more attentive, can reduce the subsequent very much trouble. So here, we call on everyone to build up a professional and dedicated responsibility to do a good job of daily maintenance, to improve skills and make work easier.
