A wind farm configuration for load-following control and its application to primary frequency support
As penetration of wind energy goes high, many relevant issues have been dealt with. Among them, a novel active power control strategy named load-following has been investigated recently. While the conventional way is to extract energy from wind as much as possible, the load-following mode allows wind-turbine generator (WTG) to work away from the maximum power extraction. Although part of wind energy is sacrificed, it is meaningful in some islanded micro-grid case where the energy should be limited to meet the local load demand. This paper continues to investigate a possible method to realize a better load-following feature of WTG. The problems it encounters with WTG inertia are analyzed and solved with the Speed-Up/Down Averaging (SUDA) method. A configuration for wind farm with improved load-following is then proposed. Based on this improved feature, an important application in terms of primary frequency support is investigated.