meingott : Herr raldinho 27.02.12 08:55 Lesen sie eigentlich ihre Berichte, die sie einstellen? Ich lese ja aus ihrem Link, dass die Chinesen genug Strom erzeugen mit ihren Turbinen, aber den nicht zur genüge ins Netz bringen http://www.power-eng.com/news/2012/02/26/...er-grid-media-report.html nicht nur das...im Gegensatz zu Ihnen, scheine ich diese auch zu verstehen bzw. denke eine Ahnung zu haben, womit dies Zusammenhängen könnte...in o.g. link findet sich "Some wind-farm power generation units failed to win access to the power grid due to the inferior quality of their operation, which did not meet the technical specifications for grid connection, Yuan said." was genau sind wohl die da angesprochenen "technical specifications for grid connection"...könnte da evtl. die hier so oht angesprochene lvrt-capability auch mit gemeint sein?.) August 15, 2011 • China China plans stricter grid code for turbines in bid to curb outages... The new code demands that projects use only turbines with low-voltage ride-through (LVRT) capability. This technology, which keeps turbines operating even after a large drop in voltage, has become increasingly vital following a series of major outages at wind farms this year.
On 17 April, 702 turbines tripped off the grid at a wind farm in Jiuquan, Gansu province, after two box transformers broke down, causing a dip in voltage. On the same day, 644 turbines had to be disconnected in Zhangjiakou, Hebei province, for the same reason. Two similar incidents occurred in Gansu in February.
Experts say none of the turbines installed in China before 2010 is LVRT-capable, yet wind power accounts for a fifth of total electricity generation in parts of Inner Mongolia and Gansu....
About ten models have completed LVRT testing so far, says Wang Weisheng at the institute’s renewable-energy department. They include 1.5MW models made by Nordex and Ming Yang. But with 50 or 60 suppliers in China, the institute is under pressure, says Olsen. The tests can take more than two months, depending on the wind. http://www.wind-watch.org/news/2011/08/15/...-in-bid-to-curb-outages/ eine Nordex 2,5 MW Anlage steht ebenfalls in The testing centre at Zhangbei...seit 2010... 2011-10-22... Jens Olsen stressed that" we have today the 2.5MW fan launched in 2010, actually had in Zhangbei successful hoisting. this-Taiwan N90/2500kW fans as EPRI pilot project, to enable Nordex to install the fan stand-alone power in China's largest foreign brands. and this section fan, low voltage across the test is also at the same time, 2.5MW fan of the localization of production is already in full swing... http://hg5.new0546.com/news/554.html |