LVRT technology to become mandatory in wind turbines
June 23, 2011 Category Alternative energy, Environment
China is planning to issue stringent national standards for wind turbine manufacturers, requiring that all installed wind turbines are equipped with low-voltage ride-through (LVRT) capability to ensure stability to the power grid. “This will put considerable pressure on wind turbine makers and wind farm operators to upgrade China’s 34,000 wind turbines,” said Li Yinghua, Deputy Director of the Security Regulatory Bureau under the State Electricity Regulatory Commission (SERC). Compulsory national standards for wind-generated electricity are needed to regulate grid compliance and build a strong smart grid in the country, industry experts said. The current standards were not enforced nationally. It costs between CNY10,000 and CNY500,000 to upgrade a single wind turbine by installing LVRT, depending on the turbine model, said experts from Denmark-based Vestas Wind Systems. “Some turbine models
merely need software upgrading, while others require much more than that,” said Shi Haifeng, an expert with the Finland-based The Switch, a leading supplier of wind turbine components. The current standards also suggest wind farm operators to install the Static Var Compensator, which costs at least hundreds of thousands of yuan and can maintain steady voltage and stabilize the power system. Thousands of wind turbines were disconnected from the grid in the past months because they were unstable. China increased its total wind power capacity to 41.8 GW in 2010, up 62% from the previous year. However, for the first time since 2005, growth in wind power is slowing down, the China Daily reports.
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