According to the German Federal Network Office (BNetzA), the average power outage time per user in Germany has decreased from 21.53 minutes in 2006 to 13.9 points in 2018. BNetzA said: “The share of energy transformation and decentralized power generation is increasing and there is no negative impact on supply quality.” BNetzA's analysis records all power outages lasting more than three minutes, with a total of 167,400 power outages in 2018, which is self-recording The second lowest value since.

Therefore, despite the progress in the development of wind and solar power, Germany's power supply is one of the most reliable power sources in the world, and the average power outage time has continued to decline in recent years. Factors affecting grid operation In addition to extreme weather events, price speculation in the electricity market can also put pressure on the grid. Germany has recently introduced a new generation capacity management system in the market that can prevent future fluctuations caused by such price speculation.

The proportion of photovoltaic power generation in Germany is 8.5%, which is much higher than the level of 2~3% in China. Why is there no power constraint?

The main reason lies in the following three points:

(1) The German power grid is not an independent power grid, but is located in the European power grid. The photovoltaic and wind power installed capacity in a large number of countries around Germany is much lower than that in Germany. Therefore, Germany can improve power constraints through export power at noon and night. problem.

(2) The technical level of the German thermal power unit is better than that of China, and the peaking depth is better than that of China.

(3) Since 2010, Germany has continued to subsidize energy storage, so that the installed capacity of energy storage in Germany has reached a high level, which can alleviate the scheduling problem.