Solar power plants
Solar power plants
(OP)
Dear Colleagues.
I'm locking for some fundamental documentation about utility size of solar power plants.
Point is not inverters or strings, issue is connection to MV level and auxiliary supply of inverters, optional configuration: ring, star, option of outdoor solutions, protection and automation.
Could you please recommended some good sites or books.
Thanks in advance.
I'm locking for some fundamental documentation about utility size of solar power plants.
Point is not inverters or strings, issue is connection to MV level and auxiliary supply of inverters, optional configuration: ring, star, option of outdoor solutions, protection and automation.
Could you please recommended some good sites or books.
Thanks in advance.






RE: Solar power plants
RE: Solar power plants
G.F.
www.engineering-services.gr
RE: Solar power plants
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SatCon and Advanced Energy are big in North America. Usually the inverter manufacturer will want to brag about where they've supplied units. They also show the major configurations.
It's a starting point, but it's not as neat a package as what you asked for. Hope it helps anyway.
RE: Solar power plants
I have a lot of documentation from vendors of inverters ( ABB and Siemens).
GEORGE2311, btw, I not have experience with wind farm too :).
I also finished design of some solar farm 1250kVA before few month.
Now is some big farm, about 10MVA, from technical point of view is not problem, my problem is more economical evaluation.
RE: Solar power plants
A question in return: How do you evaluate the benefits of static vs rotary grid tie inverters?
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Solar power plants
There is an IEC for Transformers for windturbine applications IEC 60076-16ed1.0( 2011-06),most of it will be applicable for transformers used with solar power plants.
RE: Solar power plants
1) 1999_ M R Patel_Wind and Solar power Systems_CRC Press
2) 2007_John D McDonald_Substation Engineering _Crc Press
RE: Solar power plants
1) Chose at least 7x1250kva kiosks assuming 13,5% losses(or external inverter packs)
2) Place each kiosk or external pack at the middle of each own pv panels field territory (after a lot of studies this configuration has less power losses)
3) Make a MV loop and use two incoming bays at the collective MV substation in order to reassure the production export to grid. 10MWp is quite big number to afford power discrepancies. In each kiosk MV distribution use one incomer and one outgoing feeder just to reassure that you can disconnect a faulty or under maintenance kiosk. The incomer and the outgoing feeder don't need to have protection (a lot of money) just install protection to the transformer feeder and of course at the two mv panels at the collective S/S. My personal opinion is not to bother about direction protections and discrimination between the kiosks.
Don't forget to foreseen at least one spare mv cable core. Normal feeding is done through one mv incomer at MV collective S/S.
That is exactly the design i followed in a 50MWp project.
Hope that helps.
PS: alternatively, you can use instead of two incoming cable feeders at the MV S/S just one with double cable box. In any case go for a loop.
G.F.
www.engineering-services.gr
RE: Solar power plants
This is a classical solution, I'm used loops with RMU..
I see, you use protection only in the main breakers too.
I think about some fault indicators..
Gunnar, sorry, I don't understand your question.
RE: Solar power plants
The configuration is a PV field, a DC motor and a synchronous generator. The generator is connectoed to the grid and the DC motor excitation is controlled in such a way as to run at a voltage close to the sweet spot - usually the knee in the U/I characteristic of the PV field.
I have worked with quite a few such units, often several 1 - 1,2 MW units are connected together to form 6 - 10 MW plants.
Advantages are: No EMI problems (DC and synch generator - no PWM). Robust (tolerates a lot more lightning than a PWM inverter does). Simple (no expensive and hard-to-find experts needed).
I don't know about costs. But they are being used. So, it cant be too bad.
I was asking for your opinion when comparing solid state inverters and rotary inverters.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Solar power plants
G.F.
www.engineering-services.gr