Japan Building Giant Battery Systems to Store Solar Power
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Re: Japan Building Giant Battery Systems to Store Solar Power
#2[deleted]
Re: Japan Building Giant Battery Systems to Store Solar Power
#350000 kilowatt, for how many milliseconds? The phone in my pocket has a 500 _giga_watt battery. What a pity it's only 700mAh...
Re: Japan Building Giant Battery Systems to Store Solar Power
#450000 kilowatt, for how many milliseconds? The phone in my pocket has a 500 _giga_watt battery. What a pity it's only 700mAh...
Not really true, I believe lithium batteries have a discharge rate limit, but still good point.
Re: Japan Building Giant Battery Systems to Store Solar Power
#550000 kilowatt, for how many milliseconds? The phone in my pocket has a 500 _giga_watt battery. What a pity it's only 700mAh...
I know you probably already realise this, but they obviously mean kWh.
I normally wouldn't comment, but to most people a kW is a kWh and, in context, it's obvious they're talking about kWh.
Re: Japan Building Giant Battery Systems to Store Solar Power
#6"the lack of compatibility between regional power utility grids."
For folks outside the country, the grids here are actually like 19th century European railroad gauges in different countries. Meaning, after the tsunami in the north, when the nuclear power plants were shut down, they literally could not move electricity from one part of the country to another where it was needed (or could, but it was crazily difficult).
Re: Japan Building Giant Battery Systems to Store Solar Power
#750000 kilowatt, for how many milliseconds? The phone in my pocket has a 500 _giga_watt battery. What a pity it's only 700mAh...
I know you probably already realise this, but they obviously mean kWh. I normally wouldn't comment, but to most people a kW is a kWh and, in context, it's obvious they're talking about kWh.
It's possible that they accidentally quoted the maximum power rather than the energy stored, which would make the figure correct but not what most would expect.
Re: Japan Building Giant Battery Systems to Store Solar Power
#850000 kilowatt, for how many milliseconds? The phone in my pocket has a 500 _giga_watt battery. What a pity it's only 700mAh...
I know you probably already realise this, but they obviously mean kWh. I normally wouldn't comment, but to most people a kW is a kWh and, in context, it's obvious they're talking about kWh.
The linked document mentions 50,000 kW and 300,000 kWh.
Re: Japan Building Giant Battery Systems to Store Solar Power
#9"the lack of compatibility between regional power utility grids." For folks outside the country, the grids here are actually like 19th century European railroad gauges in different countries. Meaning, after the tsunami in the north, when the nuclear power plants were shut down, they literally could not move electricity from one part of the country to another where it was needed (or could, but it was crazily difficult…
I'll just note that, since you need AC-DC conversion for a battery anyway, you could build one with two converters connected to two grids ...
(Good illustration of sunk costs though. Presumably it's prohibitively expensive to merge the grids.)
Re: Japan Building Giant Battery Systems to Store Solar Power
#10"the lack of compatibility between regional power utility grids." For folks outside the country, the grids here are actually like 19th century European railroad gauges in different countries. Meaning, after the tsunami in the north, when the nuclear power plants were shut down, they literally could not move electricity from one part of the country to another where it was needed (or could, but it was crazily difficult…
Yes, japan is split into a 60 Hz (west) and a 50 Hz (east) power distribution systems. They do have four main frequency converter stations that can move power between the two networks, three of them are shown on this power distribution map:
https://en.wikipedia.org/wiki/Shin_Shinano#/media/File:Power...
Taken together they have a capacity of around one Gigawatt. Here is some more information on the used technology:
https://en.wikipedia.org/wiki/Higashi-Shimizu_Frequency_Conv...
https://en.wikipedia.org/wiki/Sakuma_Dam#HVDC_frequency_conv...