Intelligent Control of Solar Power Inverter

Intelligent Control of Solar Power Inverter




Design of solar power inverters to be considered two key factors of efficiency and harmonic distortion. Efficiency can be divided into two parts: the solar energy efficiency and inverter efficiency. Inverter efficiency depends largely on the design of the use of external components, rather than the controller; and solar energy efficiency and controller to control the solar panel array. Each solar panel array, a maximum operating power depends largely on the array of temperature and light. MCU must control the solar panel array, output load, so that the work array maximum power. Since this is not a math-intensive algorithms, so you can use low-cost MCU to complete the task.



Currently, most solar power inverter solar panels can only come from one of the best position of the solar panels to optimize the overall efficiency. This optimization method has seriously hampered the efficiency of solar power generation systems. If the PV system in the non-optimal voltage and current level of operation, the system efficiency is very low, wasted a good opportunity to collect solar energy. In photovoltaic systems, solar panels are parallel by a number of groups formed after the series. As festive lighting, as if the series in any one of the battery failure, it will cause the entire battery pack failure. In addition, when there is partial shade or debris such as shelter PV systems, this situation may also occur.



In order to solve these problems, the current solar panels are integrated bypass diode, so that current can bypass the masked part of the failure of the battery plates. Start diode, which can be current re-routing, that is diverted to bypass the battery string on failure. As a result, not only a waste of electricity supply by the potential masking panels, but also reduces the total voltage of the battery pack. Select the panels based on the principle of the best operating point, inverters have to decide whether strings should be optimized for the affected battery voltage, or should not optimize the other affected the energy generated by the battery pack. In most cases, would choose to optimize the inverter does not affect the battery packs, and a corresponding reduction in the affected battery packs of the energy, or even completely close the affected battery packs. The result is that solar PV systems as long as there are 10% of the shelter, it will affect the amount of solar power in half. The main reason of this phenomenon is the current PV systems are not comparable with extremely sensitive solar cell structure to match. Therefore, we need to adopt a higher intelligence to develop solar energy technologies and products.



To this end, the United States National Semiconductor's new Solar Magic products, can be intelligent management of solar photovoltaic (PV) solar panels power, making solar energy management more intelligent and more efficient. A solution is the so-called "micro-inverters", in each cell board are installed inverter. However, the key factors affecting PV system is reliability, cost and efficiency. Advanced micro-optimizer technology can significantly improve the solar power industry, cost-effectiveness and productivity. With its deep expertise in solar energy, experience and a reliable core technology, National Semiconductor Solar Magic technology can monitor and optimize each cell board capacity and to improve the current flow in the battery plates. Solar Magic reflects the United States National Semiconductor in the mixed-signal and power management leader in the field of advanced algorithms. Through the use of Solar Magic technology, solar power generation system Ke Wanhui more than 50% loss due to transmission, or a shadow mask with the loss of generating capacity. Micro-optimizer will intelligently manage each cell board, so that they can be the best power point to run, even if the series within the battery pack failure of individual panels will not affect the overall efficiency of the system. National Semiconductor in 2009 introduced a new micro-optimizer will promote the development of solar photovoltaic technology, renewable energy play an important role.



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