Photovoltaic power station of common failures and what is the solution?

For the acquisition of power station, the above documents and information need, involving the relevant formalities, and the same must be complete, at the same time also need to testing and evaluation, the overall quality of the power station need rectification work should be finished before hand over. Yet in reality

to buy power plant, the required documents and related procedures and contract must be complete. At the same time, the need for power station test and evaluation, the overall quality of the rectification work should be completed before the handover. However, from the actual situation, the plant operation and maintenance will face various difficulties, such as cooperate with poor quality, delay, power stations are of variable quality problem is corrected, less inefficient parts number, system design, construction quality, serious problems such as unreasonable stayed in operation maintenance personnel's mind, these problems need our attention. A, according to the power station equipped with rational management system for power plant have taken over, first of all, according to their own power plant and personnel situation, formulate reasonable division of operation maintenance and scientific management system, such as production operation system, safety management system, emergency fire fighting system, equipment operation procedures, etc. Among them, the routine inspection, regular inspection and production operation system stipulated by the special circumstances of the check is necessary, so as to master the power station running status in time, or potential problems found, guarantee the normal power generation. Throughout the course of operation and maintenance of safety management, including the reasonable use of security tools and safety operation specification, etc. To ensure the personal safety and equipment safety. Because the novice operators in site operation and fault judgment and analysis experience is limited, they need to be done by skilled personnel training. For high voltage electrical components, in the use of the certificate before work, need high voltage network access license to operate. two Photovoltaic power station common failures in the process of the photovoltaic power station operation, DC side and ac side will be failure. For the inverter, booster stations and cable collection, failure frequency is relatively small, but in the event of failure, will have a great influence on power. Failure can be seen from the backend monitoring real-time running state. For DC square string, however, because the string is large, the number of fault was found to be not easily, the frequent failure of occupies an important position in the influence power. At the same time, there are certain capacity can increase the empty, this requires the attention of the operating and maintenance personnel. As shown in figure 1, power station equipment failure, according to the frequency and percentage of statistical curve parts, mother box and the total failure frequency inverter accounted for about 90% of the total failure rate, and cable, box-type transformer, civil engineering and a smaller proportion of booster station malfunction. Components, such as loose components, failure of hot spots, broken glass, diode junction box. These problems are mainly related to the quality of their own, in addition to due to build loose briquetting loose parts. Mother box mainly concentrated in the fuse is burnt, The selected the fuse quality or low rated current of the fuse) , circuit breaker ( Such as fever and trip) , communication exception ( Including box communication acquisition module damage) , terminal fever ( Loose terminal and high resistance) , branch fault ( Ground fault, flow) , DC electric arc and other issues. Inverter is mainly focus on module ( The main board) Failure ( General and high temperature in the cabinet caused by poor exhaust system) Overheating, module ( Cooling module itself) , fan damage problem, fuse, smoke sensor, circuit breaker tripping, abnormal startup, ground fault, etc. DC cable are mainly concentrated in ground fault, insulation cortical damage ( Caused by construction or car) , cable breakdown problem, cable head fever ( Design institute of design is not in conformity with the actual, heat wire diameter is small, hard to avoid) , short circuit, etc. For example, during the period of construction of skin damage and shallow buried depth, especially in some soil quality as the grains of sand ground stations. If the cable is buried deep shallow, easy operation and maintenance vehicle rolling on the cable damage, need timely detection and treatment during the inspection. Other problems including power station foundation sink, or caused by rainfall erosion and collapse caused by the tilted support, as well as some flood control measures. Outdoor tank of transformer oil leakage, low oil level, the main circuit breaker failure and other issues.