Continuous introduction of recent national policies and measures to support distributed generation, encourages units, installation of community and family, the use of photovoltaic power generation system, orderly construction of photovoltaic power plants. From a global perspective, the development of photovoltaic system good countries, such as Germany, Italy, the United States, Australia and other countries, distributed photovoltaic power generation has been the main form of photovoltaic development, accounting for over 80%.
Solid Dulwich PV solar panel inverters have been used in tens of thousands of distributed power generation systems, and has accumulated rich experience. My opinion, the distributed power generation system based on in-depth analysis and forward-looking forecasts global distributed generation,
Conversion efficiency, such as the photovoltaic system, the sunlight by the solar panel converts DC (panel the conversion efficiency, is usually 15% -18%), the DC and then converted into alternating current by the photovoltaic inverter, and the grid connection (inverter conversion efficiency, typically 96% -98.8%); the inverter MPPT tracking efficiency. The conversion efficiency reflects some point, the ability of the system output power. The MPPT tracking efficiency is reflected any point in time, the inverter system can track the maximum power point, the system has a maximum power output capacity.
Efficiency (ie, the conversion efficiency the the MPPT tracking efficiency of both the organic combination) is the primary factor considered by the distributed power generation system to determine the ROI of the system, is the focus of the industry. Therefore become a pillar of the distributed generation system. Solid Dulwich on this indicator reached world-class level. Latest PHOTON test report (December 2012) shows solid Dulwich GW4KW-SS Ranked first in the world in the same power inverter, a full range of global top three Asia-Pacific region, in the domestic counterparts absolutely leading .
Renewable energy generation in general has a gap characteristics, generating instability, poor power quality, wind power, photovoltaic power generation even become a "spam," or even abandoned or deny access. Is an important indicator for measuring power quality THDi, the total current harmonic distortion, the distortion the more powerful, the worse the power solar charge controller quality in accordance with international norms and requirements, THDi can not exceed 5%, otherwise the grid can refuse access. The industry standard is generally 2% to 3%. Solid Dulwich at the international advanced level in the indicators, a full range of less than 1%. As follows:
In accordance with the dynamic point of view, if the current rate of 2% to 3%, 5 years after the harmonic distortion of the power station may decay to 3% -4%, after 10 years may exceed 5%, so that the power station will be barred from access to the grid ( and in the the grid proportion of the increase with the generating capacity of distributed systems, the power grid is likely to improve the the THDi standard). So, THDi distributed generation systems need to focus on the second pillar.
A complete, rational design of distributed power generation system, you need to have the power storage function, that is, the energy storage capability. Because the gap characteristics of distributed power generation systems, leading to their input on the grid is not uniform, a tremendous impact when distributed large-scale power generation connected to the grid when the input is not balanced be grid (grid to protect the stability and reliability power supply.
Therefore, distributed power generation system requirements with storage capabilities, and through its own storage to stabilize itself (or nearest) generating electricity peak load shifting wrong valley phenomenon. In Europe,
and other distributed photovoltaic rapid development of the country, have been
aware of this problem, and substantive measures to encourage distributed
generation system with storage function. Therefore, storage of electricity has
become the third pillar of distributed generation. Germany
Management of distributed systems, including "self-management" and "management" two functions. The "self-management" system management system through the inverter, power generation data monitoring, storage, analysis, upgrade, optimization. "Management" side starting from the point of view of the large power grids, the grid after the acceptance of a large-scale distributed generation system, from the angle of the grid unified scheduling, accept its unified scheduling requirements of distributed power generation systems.
Such as the German implementation 2012EEG standard requirements of distributed power generation systems unconditional acceptance of the grid scheduling in grid overload, the grid can be unified to send commands to distributed generation system derating to 60%, 30%, and even direct allowed Stop input grid. Solid Dulwich its full range of PV soalr cell inverters have this "management" capabilities, but also fully compliant with the latest requirements German EEG2012 new energy regulations, by connecting with PM + Solar-Log grid has become rare to have such the strength of the inverter company.