What is power limitation throttling
Feed-in management, curtailment & power limitation of photovoltaic systems
In private households with a PV system output less than 30 kWp Alternatively, there is also the option of using the system to 70 percent of their maximum rated power to reduce and thus to bypass the regulation completely.
For a limit the nominal power to 70 percent should be decided when operating a photovoltaic system, which are already due to the design cannot provide full performance. This is e.g. B. the case when the solar moduleson the east and west sides of the roof are attached or because the PV system unfavorably shaded becomes. Therefore, in these cases, the 70 percent curtailment is usually chosen not to additional loss of income.
Speaks for feed-in managementthat in practice not to be expected is that the solar system more often regulated will, as network operators first all other large (EEG) plants switch off to stabilize the grid. In addition, there is a limitation of small systemsvery laborious, since z. For example, the grid operator must inform the PV operator about the curtailment of his PV system.
Therefore, in feed-in management, the Loss of income due to electricity not fed in keep it limited. Network operators assume one Reduction in yield in the lower single-digit percentage range out.
Further points to be considered in the Decision between a power limitation or a feed-in management should note:
- If you decide for a cap the system performance, you should perhaps think about increasing your own consumption through intelligent control technology and power storage, otherwise the PV system not fully used can be. This is possible because the EEG is only one Reduction of the power at the grid connection point and no reduction in module or inverter output.
- The EEG 2014 provides for the possibility that owners of the photovoltaic system also at a later time switch to feed-in management and limit the system performance first. This may be useful if up to date very high equipment and retrofitting costs, especially for remote shutdown incurred, which could later be cheaper.
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