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For grid-connection control strategy, current reference values are given in dq0 coordinate in order to achieve active and reactive power decoupling: d-axis current reference value is given by DC voltage controller, feeding grid; meanwhile q-axis current reference value is given by the reactive power controller, generating capacitive or inductive active power.
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According to California grid operator CAISO, the amount of utility-scale solar feeding the grid has soared fifteenfold in the past five years.
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Using this MPPT method the generated power by the turbine is considered to be, in terms of power control, an auxiliary source feeding a grid.
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The feed-in tariff law in Germany (EEG) guarantees payments for the electricity fed into grid for 20 years.
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