An Apple TV costs twice as much as a Roku Streaming Stick+, no the stupid "horespower" blah blah blah blah shit doesn't matter. It's a streaming thing, you stream, it works or it doesn't, your not mining bitcoin or curing cancer with it.
I agree. That's why I went with the Roku. They are so cheap!
Even in place like the space center where I know for a fact you can leave a brand-new Alienware laptop unattended for weeks at a time in full view in a not actually public but still accessible to many area with nothing holding it down but a power and Ethernet cable.
I guess at NASA you can't really count on gravity holding stuff down...
...your car would go faster too if you took out all the windows, airbags, seatbelts, the doors and panels, stripped out the seats, air con, reduced fuel tank size to 10% of current capacity, not many people though would say that the car was better and today's cars are shit because of everything they come with.
Yes, white noise is Gaussian. But if you copy a white noise track created by someone else then that copy is no longer Gaussian relative to the original track - it's instead identical.
Yes! We first have to determine if these are two independently generated sets of random data. If so, then the algorithm is setting a false positive. However, a randomly generated set of data will be extremely unique. If it's copied, you should be able to tell.
It is likely a linear power response to frequency with a small dead band.
I figure there has to be some sort of dead band, otherwise the other power sources on the grid wouldn't have an input to respond to, and the battery would be constantly active.
I find it interesting that you mention it's a linear response to frequency. That would make it proportional control only. Makes sense for a system that's designed only for rapid response. Let the battery correct large errors rapidly, and let the traditional power sources close the smaller errors (integral control).
Read up on generators and how demand influences frequency.
When you're done, go read some man pages.
It astounds me that someone will take the time to write a post, but not take the time to actually answer the question that was asked. How that is that insightful?
Unfortunately, what it might mean though is that Tesla's response is too quick, so the normal mechanisms in place to adjust other generator output aren't ramping up fast enough. Hope we get details at some point...
I was thinking the same thing. If the Tesla battery responds too rapidly, the rest of the grid will be unaware that more generation is needed. However, I think that could be mitigated with a dead-band on Tesla's side. (It may already be) Basically, the Tesla battery would only intervene if there is a large enough error in grid frequency. And it should purposely leave some droop in the grid frequency to signal other generators that more supply is needed.
I'm curious about what kind of control logic the massive battery must use to decide when to intervene. There must be some sort of dead-band, otherwise the battery would drain itself quickly, and the rest of the grid wouldn't have any signal that additional supply was needed.
It also has to decide when to recharge itself, which I assume would use a similar logic, except looking for excess frequency conditions.
Your right, it didn't stop an outage. The newsworthy part is how rapidly it responded.
Even with a battery 5 times larger, it could only keep running for a finite amount of time. Another generator would eventually need to be added to the system.
It's very difficult for one generator to go out of phase with the others. It's more likely the other generators will turn the failed generator into a motor to keep it in phase.
So if I interpret right, the extra supply (from the battery) meant that the generating station didn't bog-down and the grid was able to ramp-up to 50Hz again.
Reading TFA, it seems the other generating stations didn't bog down as much as they could have. The grid was short ~500MW, and the Tesla battery can only make up ~100MW. It just stabilized the grid a bit until another generator could be brought online.
If a power source goes offline, wouldn't you see a slump in voltage? Why the decrease in frequency?
In DC, yes. AC is a different animal. The AC frequency is determined by the speed of the generators. When demand outstrips the supply, the generators slow down. Therefore, the frequency drops.
You would likely see a drop in voltage too. However, AC voltage is difficult to measure. Frequency is a much more precise way to measure the status of the grid.
For those that don't know. The frequency of AC power is an indicator of the supply and demand status of the grid. The frequency is determined by the speed of the generators at the power station. If there is too much load on the generators, they slow down, and the grid frequency drops.
The Australian grid is targeting 50Hz, and had dropped to 49.8Hz.
10k miles on a new car, and not a single oil change. What a way to ruin an engine during the critical break-in period (pun not intended) yeah, the car is forever fucked
If it had synthetic oil, then the car is probably ok. Some synthetic oil can take you 15k miles before needing a change.
Even with conventional oil it's probably fine. Newer cars are much better at keeping oil in the right conditions so it doesn't break down. My wife's Ford has an algorithm that tells her when to change the oil. It goes over 10k miles between oil changes on a regular basis.
Sure, it was in the break in period. I believe Honda is one of the few manufacturers that still do that. However, any metal from the break in process is likely caught in the filter.
The diesel oil I work with usually needs to be changed because it starts to become too acidic. Even if the oil was past it's change interval, it would take quite a while for the acids to dissolve a significant amount of material.
Some car audio systems are extremely integrated into the vehicle. They may be stuck with a nonfunctional radio for years.
I know people who are still complaining about the digital TV transition here in the US, because they used to be able to get a weak signal with analog, and now they get nothing. Sounds like Norway is having the same problem.
They should have transitioned this over ten years like digital TV in the US.
My Brother-in-law bought a Huawei to use with AT&T. He loves it. I decided to get one for myself. However, using Verizon, I couldn't. The choice of phones for Verizon are now very limited. Hopefully this news changes that.
Slashdot Mirror
The money to be made isn't in the coins themselves, but the transaction fees.
Even if the coins are worthless, enough trading volume will generate some sizeable revenue.
but the technology is still useful. Which currency will dominate?
An Apple TV costs twice as much as a Roku Streaming Stick+, no the stupid "horespower" blah blah blah blah shit doesn't matter. It's a streaming thing, you stream, it works or it doesn't, your not mining bitcoin or curing cancer with it.
I agree. That's why I went with the Roku. They are so cheap!
Thanks!
I ordered a Roku. Should arrive today!
Even in place like the space center where I know for a fact you can leave a brand-new Alienware laptop unattended for weeks at a time in full view in a not actually public but still accessible to many area with nothing holding it down but a power and Ethernet cable.
I guess at NASA you can't really count on gravity holding stuff down...
Disrespect for rule of law isn't what's concerning. Many laws are unfair and harmful.
What's disheartening about this story is the lack of human decency. Especially the guy hoarding bikes in his garage.
I'm thinking that creating bumper stickers in a common license plate font would be enough. It would be fun to try.
...your car would go faster too if you took out all the windows, airbags, seatbelts, the doors and panels, stripped out the seats, air con, reduced fuel tank size to 10% of current capacity, not many people though would say that the car was better and today's cars are shit because of everything they come with.
So the PC equivalent of this?
Yes, white noise is Gaussian. But if you copy a white noise track created by someone else then that copy is no longer Gaussian relative to the original track - it's instead identical.
Yes! We first have to determine if these are two independently generated sets of random data. If so, then the algorithm is setting a false positive. However, a randomly generated set of data will be extremely unique. If it's copied, you should be able to tell.
Since the battery only needed to supply 7MW to correct the frequency, the grid was only short 7MW.
The battery never brought the grid to the nominal 50Hz.
It didn't respond too rapidly. The frequency was below the absolute minimum of 49.85Hz for normal operation.
Just putting out a wild idea: they configured the battery to kick in at 49.80Hz on purpose.
Yes, If you look at the graph in TFA, it looks like it turned on 100% at 49.80Hz and decreased power linearly until the frequency reached 49.85Hz.
It is likely a linear power response to frequency with a small dead band.
I figure there has to be some sort of dead band, otherwise the other power sources on the grid wouldn't have an input to respond to, and the battery would be constantly active.
I find it interesting that you mention it's a linear response to frequency. That would make it proportional control only. Makes sense for a system that's designed only for rapid response. Let the battery correct large errors rapidly, and let the traditional power sources close the smaller errors (integral control).
Read up on generators and how demand influences frequency.
When you're done, go read some man pages.
It astounds me that someone will take the time to write a post, but not take the time to actually answer the question that was asked. How that is that insightful?
Unfortunately, what it might mean though is that Tesla's response is too quick, so the normal mechanisms in place to adjust other generator output aren't ramping up fast enough. Hope we get details at some point...
I was thinking the same thing. If the Tesla battery responds too rapidly, the rest of the grid will be unaware that more generation is needed. However, I think that could be mitigated with a dead-band on Tesla's side. (It may already be) Basically, the Tesla battery would only intervene if there is a large enough error in grid frequency. And it should purposely leave some droop in the grid frequency to signal other generators that more supply is needed.
I'm curious about what kind of control logic the massive battery must use to decide when to intervene. There must be some sort of dead-band, otherwise the battery would drain itself quickly, and the rest of the grid wouldn't have any signal that additional supply was needed.
It also has to decide when to recharge itself, which I assume would use a similar logic, except looking for excess frequency conditions.
Your right, it didn't stop an outage. The newsworthy part is how rapidly it responded.
Even with a battery 5 times larger, it could only keep running for a finite amount of time. Another generator would eventually need to be added to the system.
It's very difficult for one generator to go out of phase with the others. It's more likely the other generators will turn the failed generator into a motor to keep it in phase.
So if I interpret right, the extra supply (from the battery) meant that the generating station didn't bog-down and the grid was able to ramp-up to 50Hz again.
Reading TFA, it seems the other generating stations didn't bog down as much as they could have. The grid was short ~500MW, and the Tesla battery can only make up ~100MW. It just stabilized the grid a bit until another generator could be brought online.
...with more current draw they are slowed down similar to how putting more load on a gas engine will slow it's RPM down.
That is literally what is happening. The engines at the power plants are slowing down due to the additional load.
Just like a Tesla car, the battery can go from no load to full load in milliseconds, where a mechanical engine takes significantly longer.
If a power source goes offline, wouldn't you see a slump in voltage? Why the decrease in frequency?
In DC, yes. AC is a different animal. The AC frequency is determined by the speed of the generators. When demand outstrips the supply, the generators slow down. Therefore, the frequency drops.
You would likely see a drop in voltage too. However, AC voltage is difficult to measure. Frequency is a much more precise way to measure the status of the grid.
For those that don't know. The frequency of AC power is an indicator of the supply and demand status of the grid. The frequency is determined by the speed of the generators at the power station. If there is too much load on the generators, they slow down, and the grid frequency drops.
The Australian grid is targeting 50Hz, and had dropped to 49.8Hz.
10k miles on a new car, and not a single oil change. What a way to ruin an engine during the critical break-in period (pun not intended) yeah, the car is forever fucked
If it had synthetic oil, then the car is probably ok. Some synthetic oil can take you 15k miles before needing a change.
Even with conventional oil it's probably fine. Newer cars are much better at keeping oil in the right conditions so it doesn't break down. My wife's Ford has an algorithm that tells her when to change the oil. It goes over 10k miles between oil changes on a regular basis.
Sure, it was in the break in period. I believe Honda is one of the few manufacturers that still do that. However, any metal from the break in process is likely caught in the filter.
The diesel oil I work with usually needs to be changed because it starts to become too acidic. Even if the oil was past it's change interval, it would take quite a while for the acids to dissolve a significant amount of material.
My Dad likes to listen to AM talk radio. Whenever we drive under power lines he complains about the buzz in the signal.
"Why can't they come up with some technology to get rid of that?" he says.
"It's called FM radio, Dad."
Some car audio systems are extremely integrated into the vehicle. They may be stuck with a nonfunctional radio for years.
I know people who are still complaining about the digital TV transition here in the US, because they used to be able to get a weak signal with analog, and now they get nothing. Sounds like Norway is having the same problem.
They should have transitioned this over ten years like digital TV in the US.
My Brother-in-law bought a Huawei to use with AT&T. He loves it. I decided to get one for myself. However, using Verizon, I couldn't. The choice of phones for Verizon are now very limited. Hopefully this news changes that.