How should we regulate the expansion of the domestic photovoltaic power station?

Rural become the main distributed photovoltaic development over the years, many people because of poverty alleviation, because local subsidies support, install on the home photovoltaic power station, with 1 - 2 years of time, there are certain income accumulation, changed people for photovoltaic

in the past few years, in the rural areas has become a key battleground in the development of distributed photovoltaic (pv). Because of the poverty alleviation and local subsidies support, many people in the home to install photovoltaic power station. In two years, they have accumulated certain interests, changed the preconceptions of photovoltaic power generation. More and more people want to expansion of small capacity power station at home, some people even expansion in private. In fact don't encourage capacity expansion in private. Why don't you be encouraged? Main reasons are as follows: one is rural transformer capacity is limited. With the increase of photovoltaic devices in recent years, some areas will certainly reach the village of transformer capacity limit. Without the consent of the power supply unit, a massive expansion of power grid, power station will cause potential safety hazard to transformer, will also affect the quality of power grid. Second, the need to consider the technical problems of expansion without permission. Matching capacity than, for example, is not as simple as users think, just add a photovoltaic panels and less to install a photovoltaic panels. So, how should be properly extended? First of all, because you apply new capacity with the past, then you need to apply for the new extension. At present, the filing process varies from place to place, you can consult the local power supply department. Understand the expansion. In theory, many rural users photovoltaic system is designed in accordance with the 1:1 capacity than. In fact, from the perspective of the average power cost and the internal rate of return of system, the system than the optimal capacity greater than 1:1. In many cases, users to install over load operation of power stations are basically. Therefore, the expansion will need professional installation and design units. Excessive reasonable matching can increase income, it is allowed. Within a reasonable range of excessive matching is not opportunistic behavior, but related to the part of the photovoltaic system. We know that the pv system has a certain loss, such as element attenuation, installation method, line loss, element block and consistency issues. Through compensation and active before match, power station can be achieved by reasonable match and extension to expand capacity, to make up for the loss caused by damage. Under normal circumstances, will follow the compensation and take the initiative to match. Compensated matching refers to adjust the volume, the inverter in good light output can achieve full load. However, another type of excessive match is called active excessive match. Matching in compensation to make the inverter after some time cycle could be run at full capacity, the capacity of the photovoltaic modules continue to increase. By actively extend the inverter at run time, in the increasing number of element input strike a balance between cost and system generating income, causing the system average power cost is small. To sum up, the installation of the power station in rural areas are the reasonable configuration of excess, as long as meet the system configuration of excess standard level of technology, it is allowed. However, if after the power grid for expansion, should pay attention not to blindly follow the process and technical requirements. Otherwise, the excessive installation of power plants could face removal, pose a safety hazard, and even affect the local power grid. So, if you want to expand, you must consult relevant professional unit.