Vestas Withholds Collapse Data, Nordex Iowa and Tariffs

Vestas hasn't shared SCADA data after a South Korea turbine collapse, citing an expired warranty. Plus workers at Nordex in Iowa are concerned about tariffs. Sign up now for Uptime Tech News, our weekly newsletter on all things wind technology. This episode is sponsored by Weather Guard Lightning Tech. Learn more about Weather Guard's StrikeTape Wind Turbine LPS retrofit. Follow the show on YouTube, Linkedin and visit Weather Guard on the web. And subscribe to Rosemary's "Engineering with Rosie" YouTube channel here. Have a question we can answer on the show? Email us! TranscriptThe Uptime Wind Energy Podcast brought to you by StrikeTape, protecting thousands of wind turbines from lightning damage worldwide. Visit strikeTape.com. And now your hosts. Allen Hall Welcome to the Uptime Wind Energy Podcast. I'm Allen Hall and I'm here with Rosemary Barnes. And Fergus is here. Hi. Welcome to our top story. This week is a wind turbine collapse that happened in South Korea at the Changpo Wind Power Complex in Yeongdeok, and the turbine lost a blade. There's some video here that was recorded when the turbine collapsed, so it happened a couple of months ago, and investigators have been trying to determine the cause of that failure. They're having a little bit of difficulty because they would like to access the SCADA system of that turbine because that would have a lot of more information about [00:01:00] how the tower was operating at that particular moment. And they're having trouble in that it is a Vestas turbine and Vestas has not released the SCADA data and it's citing an expired warranty. Now, Rosemary, this leads to a lot of problems because obviously there's a ton of sensors in wind turbines today, and they can help determine causes of failures pretty rapidly. But without it, you're just really looking at video in this particular collapse. Rosemary Barnes It's amazing that you can look at video. The video is far more useful than the SCADA data is, probably. Um, yeah, it's, well, I've never actually, like, I've worked on a lot of RCAs and I've never actually got to see video footage of the incident, so that's actually really cool that they've got this dash cam footage. Looking at it now, you can, um, see the lower, probably two thirds of the turbine tower, so you can see the blades coming past. I wish the video would start just like 10 seconds earlier. [00:02:00] Um, because maybe you can see a bit of wobble in the tower. You can see that one of the blades is already missing a tip, or the tip kind of flies off anyway, so maybe it was bent. So definitely looks to me like the root cause was that there was a blade failure. The, um, part of the blade broke off, caused a rotor imbalance, which then meant that one of the blades hit the tower and then it's really easy for a tower to buckle once it's got some damage in it. So that, that in itself, like, that's not an uncommon scenario. Um, and yeah, for sure, like you would ask for the SCADA data, but, uh, I don't think it's accurate that they're saying. There must have been a faulty sensor or something because when there's a rotor imbalance, it should stop, um, stop the turbine. But I do know from experience, it does not always stop the turbine quickly enough to stop this happening. So, um, I'm not, I'm not sure that the SCADA data would tell you anything [00:03:00] groundbreaking. However, I think it is very interesting Vestas are very publicly not sharing because it's out of warranty because to me, access to the SCADA data is a key part of being able to operate your turbine safely. And you don't sell a turbine — like you might sell a turbine with a two year warranty, sure, but that doesn't mean that you are selling a turbine that can only be operated safely for two years. That's just like absolutely insane and contrary to — at least a lot of the world's laws, there's laws around, you know, how safely you can operate equipment, and especially energy generation assets have specific laws about that. You have to be able to operate them safely and yeah, from what we can see here, like you can't get access to the SCADA data. So in, in this case, I don't know if there was a problem with the turbine controller that contributed to this problem. I, I mean, I'm, I'm always a bit surprised that a turbine can shake itself apart and it's not, you know, there isn't a sensor in there that can stop it in time to stop the collapse because if you take just the population of turbines that have collapsed, which is, you know, [00:04:00] very, very few from considering the whole global population, but looking at those ones that have collapsed, it's pretty common way that it happens is from, um, part of a blade falling off and then a rotor imbalance causing the tower to, um, start wobbling and the blades to hit the tower. Allen Hall So would it be in the control laws, Rosemary, where the shutdown would happen in terms of detecting vibration or motion? Maybe swing of the tower? Would that would then drive a safety circuit? Rosemary Barnes At a certain, at a certain level? Um, 'cause all of those, like the rotor does get in a bit of imbalance. The tower does accelerate in, you know, four and a half side to side, that all happens and can happen like quite, quite a lot as well. Like if you're inside a wind turbine and when they stop it, um, then it makes like a very noticeable shudder right as that stops. And if you do an emergency stop, um, hopefully not while, you know, hopefully you're not inside the tower when it goes from full, um, operation [00:05:00] to stopping as soon as, as quickly as possible. But that does make a big, um, jump. So, you know, like it's not shutting down every time that there's some kind of imbalance or, um, tower acceleration. But yeah, it just, the thing is, it's, you just, they're big and heavy, right? And there's just so much inertia in the system that things can't happen that fast. Like even if the control system can respond really quickly, it doesn't mean that it can respond — like it can actually physically stop things before it's had, you know, even one rotation to hit the tower, um, can be enough. What's really interesting is that it could be a control system problem, right? That would — that they have now learned. There's some faulty logic they need to replace it across the wind farm. But Vestas is saying, we're not gonna tell you if that's the case or not, because you can't access this data. And I think that that is really interesting because like I'm constantly frustrated by how little, um, cooperation you can get for root cause analysis and like you can [00:06:00] understand it, no one wants to share their data, but it is in theory covered by laws, at least in, uh, Australian states. You, you know, that you, you're required to provide information to operate the assets safely for its lifetime. And I, it just, to me is really highlighting that that's not the case. It's, it's not an unusual situation, is kind of what I'm saying. Um, it's very common that they don't wanna cooperate, and I'm surprised that they're happy to say that so, so publicly. Allen Hall Well, the threshold needs to be set somewhere when investigators are looking into an accident like this. I always think you try to help the investigators as much as you can. In the airplane world when there's an accident, that's one of the first things that happens is they go pull all the data from the aircraft and then go search through it and see what happened. In the wind turbine world, that's not necessarily the case, but there is a lot of data at all the OEMs, and it's not necessarily locked into the turbine. It's usually remote access, so it would be very easy to give access to [00:07:00] investigators. So it's, it's curious to me as to why there's any hesitation at all if the Korean investigators wanna see the data, just give it to 'em. Rosemary Barnes Yeah. Especially because like from just the brief look that I've had, it doesn't look like it's gonna turn out that there's some problem with the turbine controller. If Vestas aren't to blame, it would be much easier for them to just privately release the data under an NDA and say, look, hey, it's nothing. It's not here. But I will say that, um, in the RCAs that I've worked on, safety regulators can compel data from the owner and the operator, but it's not so clear that they have the right to get data from the manufacturer. When you've got full service agreements, you can get that because the manufacturer is the operator. But in this case, if Vestas had nothing to do with the operation, then like, I don't know what the laws are in South Korea, but it is possible at least that they don't have any right to compel Vestas for the data. Um, for the data. And I think that [00:08:00] is wrong. And, um, this, you know, will hopefully highlight to people, safety regulators around the world — hey, you know, do we need to be changing this regulation a little bit to make sure that when you sell a wind turbine, or you know, any, anything else, any other big bit of industrial equipment, when you sell it, you have to — you have to provide enough information for the life of the wind turbine to operate it safely. Doesn't mean you need to give away all your trade secrets, but it needs to be safe. And part of that is when you have a catastrophic failure, you do need to make sure that this is not gonna repeat itself across the whole wind farm or across, you know, every turbine of this type in the world. That's why you do a root cause analysis after the fact. Like you're not saving this turbine. It's in like absolute pieces on the ground, right? Like the most value you'll ever get out of this turbine again is probably recycling the steel. Um, that'll be the most value. So you don't do the root cause analysis for the lost asset. You do it to make sure that you understand what's happened and you are [00:09:00] able to, um,...