This paper analyzes the solar PV systems are covered as part of the solar panels generating capacity resulting from the problem of declining, and introduced the board level in the battery using a distributed maximum power point tracking system (MPPT) advantages, but also to the use of SolarMagic technology kinds of case study results were discussed.
Solar is the most promising renewable energy sources. Since the introduction of incentives and traditional impact of rising electricity costs, more and more families are turning to solar energy, and the roof installation of photovoltaic (PV) systems. At current prices the PV system, the user typically 7-8 years to get return on investment. Government incentives and the life of PV systems must be able to last 20 years or more. Return on investment of solar PV systems depends on the annual generating capacity of the system, so users need the PV system must have efficient, reliable and easy maintenance features to get maximum power output.
Today, many users install solar PV systems have been partially or intermittently aware that the shelter will affect the system’s generating capacity.
Some shadowing on the solar system:
When the trees, chimneys or other objects blocking the projection of the shadow of the photovoltaic system, it will cause the system to result in a “mismatch” problem. Even if the PV system only obscured by the shadow of a little bit of generating capacity will lead to a sharp decline. Part of the shelter system due to mismatch the real impact of power generation is difficult to get through a simple formula. Generating capacity of the system because of many factors, including the interconnection between the internal battery module, the module orientation, solar batteries series-parallel connection between the problems and inverter configurations. PV modules are connected through multiple battery strings together, each battery string is called a “set of columns.” Each set of columns by a bypass diode to protect, so that one or more cells to be obscured or damaged, the entire battery string lead to damage due to overheating. The battery packs in series or in parallel columns can make solar panels generate relatively high voltage or current.
Together by the solar array of photovoltaic modules in series by parallel composition. PV modules per string must be less than the maximum voltage of the inverter maximum input voltage rating.
When the PV system was partially obscured when the battery is not covered in the masked part of the current flowing through the bypass diode.
When the PV array be obscured and the above situation, we will produce a peak of VP has multiple electrical curve. Figure 1 shows the maximum power point with a centralized tracking system (MPPT) feature standards and network configuration, one set of columns of the two panels to be obscured. Centralized MPPT DC voltage can not be set, so could not make out the two groups have reached the maximum output power. High DC voltage points (M1), MPPT set of columns that are not covered for maximum output power. In the low DC voltage point (M2), MPPT group would shadowing the maximum power output of the column: bypass diode bypass shelter panels, the columns are not covered in this group will provide the full amount of the battery plate current. MPP may result in multiple arrays maximum power point tracking focus (MPPT) configure additional losses, because the maximum power point tracker may get an error message to stop in the local maximum point, and stability characteristics of the times that have advantages of VP.
Figure 1. MPPT function has focused on standards and network configuration, one set of columns of the two panels to be obscured.
Different case studies and field tests show that part of the shelter of the photovoltaic power generation system has a serious impact. MPPT control through the use of a distributed system can reduce the adverse effects of shelter.
Minimize the use of distributed MPPT system mismatch problem:
For each solar array power output of PV panels have reached the maximum, National Semiconductor has developed a SolarMagic ™ technology. Through this technology, even if the other panels in the array mismatch problem occurs, each cell board is still the maximum output power. SolarMagic technology using advanced algorithms and advanced mixed-signal technology to monitor and optimize the solar PV panels each capacity, so it can compensate up to 50% of the problems that arise due to mismatch loss of generating capacity. SolarMagic power optimizer can quickly and easily installed on conventional solar PV systems.
Figure 2 shows the typical use of SolarMagic ™ technology, photovoltaic systems:
The system has n modules in parallel by the two groups formed by the column, for ease of presentation, the figure listed for each group displays only three photovoltaic modules, but the set of columns is usually 5 to 12 modules in parallel form to get the 500-800V The set of columns voltage.
A group out of all modules without radiation imbalance, each module has the same characteristics, and uniform illumination.
Group B, all the modules listed as shelter, orientation more inclined or gathered dust exposure with different characteristics or disorders. The output of each module in the SolarMagic ™ Optimizer (SMO) module connected to the input point. The output of each SMO A module used with the same set of columns in series.
Figure 2. Optimizer using SolarMagic power simplified solar photovoltaic system wiring diagram.
SolarMagic ™ optimization module has a high power integrated circuits, the use of photovoltaic modules to maximize the power output of the maximum power point algorithm. Thus, the entire set of columns with the same output current, which greatly reduces the hot spot issues and with internal bypass mode. Each SMO module will adjust its output voltage to fit the bus voltage.
The result is the photovoltaic system will show the maximum power point with a single IV curve, simplifying the operation of the central inverter, and minimize the mismatch loss caused by power generation.
The following table summarizes some of the solar PV systems are covered after the field test results, the last column shows the SolarMagic ™ technology to supplement the percentage of energy loss.
Distributed MPPT PV Solar system
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This paper analyzes the solar PV systems are covered as part of the solar panels generating capacity resulting from the problem of declining, and introduced the board level in the battery using a distributed maximum power point tracking system (MPPT) advantages, but also to the use of SolarMagic technology kinds of case study results were discussed.
Solar is the most promising renewable energy sources. Since the introduction of incentives and traditional impact of rising electricity costs, more and more families are turning to solar energy, and the roof installation of photovoltaic (PV) systems. At current prices the PV system, the user typically 7-8 years to get return on investment. Government incentives and the life of PV systems must be able to last 20 years or more. Return on investment of solar PV systems depends on the annual generating capacity of the system, so users need the PV system must have efficient, reliable and easy maintenance features to get maximum power output.
Today, many users install solar PV systems have been partially or intermittently aware that the shelter will affect the system’s generating capacity.
Some shadowing on the solar system:
When the trees, chimneys or other objects blocking the projection of the shadow of the photovoltaic system, it will cause the system to result in a “mismatch” problem. Even if the PV system only obscured by the shadow of a little bit of generating capacity will lead to a sharp decline. Part of the shelter system due to mismatch the real impact of power generation is difficult to get through a simple formula. Generating capacity of the system because of many factors, including the interconnection between the internal battery module, the module orientation, solar batteries series-parallel connection between the problems and inverter configurations. PV modules are connected through multiple battery strings together, each battery string is called a “set of columns.” Each set of columns by a bypass diode to protect, so that one or more cells to be obscured or damaged, the entire battery string lead to damage due to overheating. The battery packs in series or in parallel columns can make solar panels generate relatively high voltage or current.
Together by the solar array of photovoltaic modules in series by parallel composition. PV modules per string must be less than the maximum voltage of the inverter maximum input voltage rating.
When the PV system was partially obscured when the battery is not covered in the masked part of the current flowing through the bypass diode.
When the PV array be obscured and the above situation, we will produce a peak of VP has multiple electrical curve. Figure 1 shows the maximum power point with a centralized tracking system (MPPT) feature standards and network configuration, one set of columns of the two panels to be obscured. Centralized MPPT DC voltage can not be set, so could not make out the two groups have reached the maximum output power. High DC voltage points (M1), MPPT set of columns that are not covered for maximum output power. In the low DC voltage point (M2), MPPT group would shadowing the maximum power output of the column: bypass diode bypass shelter panels, the columns are not covered in this group will provide the full amount of the battery plate current. MPP may result in multiple arrays maximum power point tracking focus (MPPT) configure additional losses, because the maximum power point tracker may get an error message to stop in the local maximum point, and stability characteristics of the times that have advantages of VP.
Figure 1. MPPT function has focused on standards and network configuration, one set of columns of the two panels to be obscured.
Different case studies and field tests show that part of the shelter of the photovoltaic power generation system has a serious impact. MPPT control through the use of a distributed system can reduce the adverse effects of shelter.
Minimize the use of distributed MPPT system mismatch problem:
For each solar array power output of PV panels have reached the maximum, National Semiconductor has developed a SolarMagic ™ technology. Through this technology, even if the other panels in the array mismatch problem occurs, each cell board is still the maximum output power. SolarMagic technology using advanced algorithms and advanced mixed-signal technology to monitor and optimize the solar PV panels each capacity, so it can compensate up to 50% of the problems that arise due to mismatch loss of generating capacity. SolarMagic power optimizer can quickly and easily installed on conventional solar PV systems.
Figure 2 shows the typical use of SolarMagic ™ technology, photovoltaic systems:
The system has n modules in parallel by the two groups formed by the column, for ease of presentation, the figure listed for each group displays only three photovoltaic modules, but the set of columns is usually 5 to 12 modules in parallel form to get the 500-800V The set of columns voltage.
A group out of all modules without radiation imbalance, each module has the same characteristics, and uniform illumination.
Group B, all the modules listed as shelter, orientation more inclined or gathered dust exposure with different characteristics or disorders. The output of each module in the SolarMagic ™ Optimizer (SMO) module connected to the input point. The output of each SMO A module used with the same set of columns in series.
Figure 2. Optimizer using SolarMagic power simplified solar photovoltaic system wiring diagram.
SolarMagic ™ optimization module has a high power integrated circuits, the use of photovoltaic modules to maximize the power output of the maximum power point algorithm. Thus, the entire set of columns with the same output current, which greatly reduces the hot spot issues and with internal bypass mode. Each SMO module will adjust its output voltage to fit the bus voltage.
The result is the photovoltaic system will show the maximum power point with a single IV curve, simplifying the operation of the central inverter, and minimize the mismatch loss caused by power generation.
The following table summarizes some of the solar PV systems are covered after the field test results, the last column shows the SolarMagic ™ technology to supplement the percentage of energy loss.