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In this paper, a new control method of ESS for smoothing wind farm output is proposed, in which a PWM based DC-DC converter is not used and ESS is connected directly to the DC bus circuit of wind farm. This system can simplify overall control scheme and improve the efficiency of the wind farm considerably.
ldquoResidual charge methodrdquo, which has been developed for detection of non-bridged water tree, is well known as a high reliability water tree deterioration diagnosis technique for XLPE cable, and it has been applied for on-site cable system diagnosis. Traditional residual charge method measures the amount of electrical charge, and the information of cable length is required to evaluate the result...
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