Decentralized renewable energy systems can be low-carbon power sources, and promoters of local economies. It is often argued that decentralized generation also helps reducing transmission costs, as generation is closer to the load, thus utilizing the transmission system less. The research presented here addresses the question whether or not, or under what circumstances this effect of avoided transmission can actually be seen for a community-operated cluster of photovoltaic (PV) power plants in two sample locations, one in Germany and one in Japan. For the analysis, the newly developed instrument of MPI-MPE diagrams is used, which plot the maximum power import (MPI) and maximum power export (MPE) in relation to the reference case of no local generation. Results reveal that for moderately sized PV systems without battery storage, avoided transmission can be seen in the Japanese model location, but not in Germany. It was also found that additional battery storage can lead to avoided transmission in both locations, even for large sizes of installed PV capacity.

中文翻译：

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分析通过分散式光伏和电池存储系统避免的传输

分散式可再生能源系统可以成为低碳能源，并可以促进当地经济发展。人们通常认为，分散发电还有助于降低传输成本，因为发电更接近负荷，因此减少了对传输系统的利用。此处提出的研究解决了以下问题：在两个样本位置（一个在德国，一个在日本）中，由社区运营的光伏（PV）电厂集群是否真正看到了这种避免传输的效果，或者在什么情况下可以看到这种效果。为了进行分析，使用了新开发的MPI-MPE图仪器，该仪器绘制了与无本地发电的参考案例相关的最大功率输入（MPI）和最大功率输出（MPE）。结果表明，对于没有电池存储的中型光伏系统，在日本模型位置可以看到避免了传播，但在德国却看不到。还发现，即使对于已安装的大容量光伏电池，额外的电池存储也可以避免两个位置的传输。