Load Test and Analysis of a Wind Farm Before and After Technical Reform
[Purposes]Before the technical transformation of a wind power plant,the abnormal noise and vibration of the wind turbine often occur.In order to effectively support the technical transformation and solve the abnormal problem of the fan,the load test work was carried out.[Methods]Before and after the technical reform,the load test of the fan was carried out,the load quantity under different wind speeds,the comparison of limit load,the time series spectrum,the equivalent fatigue load of 1Hz and the natural frequency of tower are analyzed.[Findings]The change trend of the equivalent load of the fan before and after the technical reform is the same,and the value is similar under the wind speed 9 m/s,but as the wind speed exceeds 9 m/s,the equivalent load of the fan after the technical reform is 1 935.30 kN·m,which is much larger than 1 590.18 kN·m before the technical reform.The test results show that the power generation capacity and pitch ability of the fan are weakened after the technical transformation,so that the blade pitch is small and the wind load is large in the case of strong wind.In addition,the weight of the new bearing increases,which makes the equivalent load of the fan increase obviously.[Conclu-sions]After the technical reform,the abnormal problem of the fan is basically solved,which has certain reference significance for the engineering reform of the same type of units in the industry.
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