Discover and read the best of Twitter Threads about #hvdc
Most recents (8)
Back in 2019, we finished an UG project creating a timeline of #HVDC projects 🌎🌍🌏 and also added the what was then the newly proposed 🇦🇺🇸🇬 #suncable project.
This just looked at one aspect (the most technically challenging of all ⁉️) the undersea cable.
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This just looked at one aspect (the most technically challenging of all ⁉️) the undersea cable.
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I also wrote a (very short) article for the #VSC #HVDC newsletter that @OfficialUoM Prof. Mike Barnes was editing on the news coming out of Australia
Here are some figures that might help put the #suncable project in context.
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Here are some figures that might help put the #suncable project in context.
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*These are from 2020 when the project was the Australia - Singapore Power Link (ASPL) and part of Yihong Li's UG thesis @eetunsw
1. Cable Length vs Capacity. The 2 🟢at ~1400MW are the ~700km, 515kV & 525 kV 🇬🇧🇩🇰& 🇬🇧🇳🇴projects commonly used as comparison
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1. Cable Length vs Capacity. The 2 🟢at ~1400MW are the ~700km, 515kV & 525 kV 🇬🇧🇩🇰& 🇬🇧🇳🇴projects commonly used as comparison
3/x
ZBF release finally draws closer (zero2050usa.com). We have been working to get the data/report out & understandable. Here is a short thread with some interesting observations that we made. First, here is a cheat sheet for our scenarios (a wide spread of possibilities)
First, we find that scenarios have huge amounts of #wind & #solar. We also find that deployment rates for these (& #storage) must dramatically increase to reach our goals (with and without novel generation).
This becomes increasingly important for limited technology cases & huge for #storage in terms of energy capacity.
@NREL just dropped a new draft of its missing grid modernization study.
- Seams returns >2 years after Trump appointees squelched it
- 2 months after @INVW exposed their meddling
- And 1 month after @HouseScience told @SecBrouillette to #FreeSeams.
THREAD
theatlantic.com/politics/archi…
- Seams returns >2 years after Trump appointees squelched it
- 2 months after @INVW exposed their meddling
- And 1 month after @HouseScience told @SecBrouillette to #FreeSeams.
THREAD
theatlantic.com/politics/archi…
The #FreeSeams study projected that building a national power grid would cut costs + carbon by killing off coal and boosting wind & solar. The new @NREL Seams ordered by @Energy Dept politicos adds scenarios that "dilute" those findings. 2/7
nrel.gov/analysis/seams…
nrel.gov/analysis/seams…
@NREL Seams' new DOE-approved scenarios assume:
- higher costs for power line construction
- lower fossil fuel prices, or
- limited retirement of coal generating stations
Each of those factors make long-distance power transmission look less cost-effective. 3/7
- higher costs for power line construction
- lower fossil fuel prices, or
- limited retirement of coal generating stations
Each of those factors make long-distance power transmission look less cost-effective. 3/7
OK, most of the following is textbook stuff on #HVDC but just a quick reference for what a "low-voltage metallic return" - the faulty part of #Basslink - is used.
Basslink is a monopolar HVDC system and the original design was based on an earth return. This is quite typical of monopolar #HVDC systems as it reduces cost (requires only one cable) and losses (again because of one cable)
ptd.siemens.de/IEE_HVDC_0306.…
ptd.siemens.de/IEE_HVDC_0306.…
The reasons #Basslink was eventually designed with a metallic return were mostly environmental (see link above) to avoid
"- Corrosion of long metallic structures
- Electrolysis effects of sea electrodes
- Electric and magnetic field effects"
"- Corrosion of long metallic structures
- Electrolysis effects of sea electrodes
- Electric and magnetic field effects"
Reminder: While U.S. is arresting adults and abusing kids from Central America, China is pledging to invest $38 Billion to rebuild SA power grid, incl new #solar, #wind generation - goo.gl/uTx2VV #climatechange
Money quote: "We can install a (transmission line) that can send (#solar and #wind power) where it needs to go. We could even send it all the way to the U.S." goo.gl/uTx2VV - #renewables
Ironically, this was precisely the strategy of "Connect the Americas 2022" program launched by Secy State @HillaryClinton under @BarackObama in 2012 - goo.gl/A9htzY - #climatechange #RenewableEnergy
To extend your analogy, the key difference between retail goods and electricity is that electricity can move at the speed of light as long as there is a wire to move it on. 1/
What Euro (and now Chinese) power mkts are doing is using UHV #transmission lines to move surplus power to mkts with excess demand. This benefits #renewables which are not dispatchable also uses more capacity of baseload plants. /2
As @ABBgroupnews and @Siemens will tell you, the power loss w/ HVDC #transmission > 2,000 mi is very low and can easily tranverse water boundaries, which is why it's being used for offshore wind and across North Sea. /3
China's Bold Vision: A Global Energy Interconnection (GEIDCO) to Connect #Renewables goo.gl/sLPaao #solar #wind #supergrid #HVDC
ICYMI - @JeffDSachs presenting with @CarlPope and others at @SLU_Official's "Saint Louis Climate Summit, Apr 22-24" - @earthinstitute @MikeBloomberg @SierraClub @geidco @GCAS2018 @PeterGleick -
ICYMI - @JeffDSachs served on panel at @geidco Conference in Beijing, Mar 28, 2018. Complete video here, presentation at 3:14:40 mark - goo.gl/TMzHtE @earthinstitute @GCAS2018 @BloombergDotOrg @GENINews
Saudi Arabia and SoftBank Plan World's Largest #Solar Project goo.gl/EDZLzM #supergrid #HVDC #MENA #NEOM #OBOR @geidco
Saudi Arabia and Egypt are also planning a$1.6 billion, 3000 MW transmission line to link the two countries and the GCC Gulf State grid - goo.gl/w88NzM
.@Softbank CEO Masayoshi Son is also driving force behind Asia #SuperGrid project, linking power grids + renewables in 4 countries: China, S. Korea, Russia & Japan - goo.gl/7VchDS #solar #wind #HVDC #climatechange
