Voltage Regulation of Distribution Networks Through Reactive Power Control

Application of a control algorithm for wind speed prediction and active power generation

“…1 must be tracked. Several algorithms have been developed to ensure this tracking [1,2,11] and interesting results have been recorded. Special algorithms have been developed to follow a variable reference in order to get the P opt value in every case and consequently, important economic benefits.…”

“…Application of the PI control algorithms both for the active and reactive power control loops in order to obtain the references Q i ref and P i ref, [2,3,[11][12][13] which will be less than the maximum obtainable for the predicted wind speed.…”

“…), utilities can buy energy from different sources. Under these conditions wind energy can contribute to the grid in several ways: voltage level maintenance for the grid (through reactive power control [11]), active power production, etc. But the main problem is related to the non-predictable characteristic of wind energy, because in the electric market the energy selling process must be completed one hour before the energy is produced.…”

“…Taking into account the P max (P s ref value, calculation of the obtainable reactive power, Q s ref [2,3,[11][12][13] b. Calculation of the power factor, cos f ref for the farm c. Send the power factor reference to each generator/turbine at the farm d. Measurement of the rotor angular speed, u r in the generator/turbine e. Calculation of P i max , Fig.…”

“…11. As the reactive power control has been widely analysed [1][2][3][11][12][13] and its validity has been already proved, the algorithm described in Ref. [11] will be used to regulate the reactive power generated at a farm.…”