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Author Topic: How awkward are DNOs with 50kW PV installations - any experience?  (Read 3228 times)
Ivan
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« on: March 22, 2011, 12:41:37 AM »

I'm just wondering, as I've had very little experience ie

1)Navitron HQ - no problem, just go ahead under G83

2)Herefordshire - requrires a 3month feasibility study before they would indicate how much power could be fed into 11kV lines (you'd think they could cope with at least a few kW without the need for a feasibility study, but apparently not).

Anyone else have experiences of larger installations, and know how long it takes to get past the DNO?
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renewablejohn
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« Reply #1 on: March 22, 2011, 08:49:10 AM »

On first name terms with my local DNO officer who will normally give me an indication within 1 week of maximum export available from a particular site. I got fed up with the official route requesting how much I was wanting to export only to be rejected and then have to keep requesting lower amounts until you got to the grid capacity.
As for 11kv lines you should be good for 250kv but will require a new transformer budget for at least 75k to cover cost of transformer and connection. If 11kv poles are not on your land then forget it.
« Last Edit: March 22, 2011, 08:55:06 AM by renewablejohn » Logged
Kombi
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« Reply #2 on: March 22, 2011, 06:56:57 PM »

What about if you have both a transformer and 11kV line on your land? Any chance of an easy connection?
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Ted
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« Reply #3 on: March 22, 2011, 09:40:03 PM »

Each DNO are required to publish their Long Term Development Statement (LTDS).  This is usually available in summary form on their website and will contain a section on distributed generation. They may provide an electronic copy of the full report free of charge on request but they can charge for paper copies.

This won't give you a definitive answer for a specific connection issue but may prove useful reference.

SP Manweb's is a pretty good example - http://www.scottishpower.com/uploads/SPM2010LTDS.pdf

They can also contain a lot of other interesting info, such as daily load profiles.


* spmanweb.png (110.74 KB, 350x343 - viewed 541 times.)
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renewablejohn
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« Reply #4 on: March 22, 2011, 09:56:02 PM »

What about if you have both a transformer and 11kV line on your land? Any chance of an easy connection?

Connection will be easy but they will probably want to charge you for an upgraded transformer and you still cant get away from the connection charge
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Kombi
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« Reply #5 on: March 24, 2011, 07:36:48 AM »

Thanks John.
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