Wind turbine’s Low Voltage Ride Through(LVRT) ability must be verified by site-test, safety design was key factor of wind turbine’s mobile LVRT test device design and development. Based on research of protection scope, design principal of safety design, this paper realized five aspects of safety design: switchgear selection, relay configuration and setting value, routine operation, self-check failure lock, operation regulations. Safety design realized by this paper did not affect normal test process, colud provided perfect protection to operator, wind farm facilities and test device. Test device complied with this design had been used in wind turbine site-test and perfected well.
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