When the PV “meets” the total solar eclipse

Polaris solar PV net news: March 20, 2015, a large range of a total solar eclipse will occur in the northern hemisphere, including Iceland, Europe, North Africa, Northern Asia. Germany marks the area of occurrence of a total solar eclipse occurs at around 10 o’clock in the morning. Although the total eclipse only lasts 2 minutes and 46 seconds, but the consequences can be very serious.

Total solar eclipse of Germany effects of electric power system

When at the time of the total solar eclipse occurred, within a few minutes the light will reach the Earth’s surface from strongest to disappear, corresponding also by the biggest PV output rapidly to zero; rapid recovery and total solar eclipse when the Sun will shine, PV power will instantly rise from zero to maximum.

When a solar power system for a small time, total solar eclipse is not a big problem, because the system can handle small-scale photovoltaic output decreased rapidly and increase can dispatch personnel through technological means to deal with this kind of volatility. However, the next year Germany PV installed capacity will reach nearly 40 million-kilowatt, equivalent to 22% of the country’s total power generation capacity. PV output will reach more than 25 million-kilowatt, Germany the maximum load was only 600.08 billion.

Imagine if on March 20 next year, the Sun is shining, PV output reached 25 million-kilowatt or higher, the sudden appearance of total solar eclipse, PV output drops to zero within a few minutes. And because the light dimmed, many families will open the lighting, electrical load to increase. But the story is not over, when a total solar eclipse after the PV output will rise from zero to 2000duowanqianwa in just a few minutes, it means that you must reduce the size of power supply load in order to maintain the balance of power system real-time. Clearly, Germany power dispatching Center will be faced with this very difficult problem.

This is equivalent to a short period over more than 20 large-scale nuclear power unit tripping and reclosing, could make Germany and even Europe’s power grids fail.

Germany power dispatching Center do?

In order to solve such a large-scale power source output fluctuations, optional measures “do not let it wave” and “cooperate with its volatility” in two ways:

If it is not let solar fluctuations, dispatch Center can be made a day ahead demand Germany all PV series in advance, leaving only the conventional power supply. So that we can avoid the next total solar eclipse happen PV output to move violently. But this is difficult to do, not to mention a violation of the law on renewable energy, is to realize the series is also very difficult. Germany 80% PV above is user-side roof project, although a new law requires the distributed solar will also be equipped with a remote control device, but actually rarely configured, so the dispatcher cannot be uniform removal of these distributed PV, least qianwanqianwa. Of course, you can also call people that stop PV, such as PV panels covered with quilts.

If it is in line with the solar fluctuations, can work on power supply side and demand side two.

In terms of conventional power, finding a power supply, you can instant roof PV power loss, while in total solar eclipse over the moment to quit running. Although Germany has some pumped-storage capacity, also has a very strong interconnection with neighboring countries, but within minutes you want the system 2000duowanqianwa with power supply overload, it is almost impossible. Mainly responsible for base load coal and electricity, and to sharply regulate coal and electricity output, at least several hours.

On the load side, can promote family equipped with distributed PV configuration user-side energy storage unit, ahead lay up extra electricity, power supply load during a total solar eclipse to quickly fill the gap. But the problem is that qianwanqianwa energy storage device installed within a year, it’s an astronomical expense, and then only in response to two minutes. When a can of course during a total solar eclipse, instantly cut off 2000duowanqianwa loads. Companies do not produce, residents without lights, we all watch the solar eclipse. But which cut the 20 million-kilowatt load is not only a technical issue, it is also a matter of economic and legal issues.

Several approaches from the point of view, it is very difficult. Small series best March 20 Germany, heavy snow, covered with photovoltaic panels, solar eclipse will not cause sharp fluctuations of output of photovoltaic power generation.

Of course, in reality the Germans would ultimately be in what kind of State of mind, what kind of preparation to deal with the upcoming total solar eclipse on March 20, 2015, we’ll see.

Original title: when the PV “meets” the total solar eclipse

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