Impact of voltage dip induced delayed active power recovery on wind integrated power systems

Z.H. Rather, D. Flynn
2017 Control Engineering Practice  
Publication information Control Engineering Practice, 61 : 124-133 Publisher Elsevier Item record/more information Publisher's statement þÿ T h i s i s t h e a u t h o r s v e r s i o n o f a w o r k t h a t Abstract: Installed wind power capacity is increasing rapidly in many power systems around the world, with challenging penetration targets set at national, and/or regional level. Wind power, particularly at higher penetration levels, introduces various grid
more » ... ssues, with frequency and voltage stability being particularly critical concerns. Voltage dip induced frequency stability following a network fault in such systems is one potential risk that has so far received limited attention by the research community. With state of the art modelling, the potential impact of a delayed active power recovery from wind generation following a network fault induced voltage dip is investigated. The subsequent voltage oscillations introduced by wind turbines, exacerbating frequency stability, are also examined. Analysis is carried out for a wide range of wind penetration levels and system scenarios, with the results demonstrated on the New England benchmark system. NOMENCLATURE CHP Combined heat and power plant PCC Point of common coupling RoCoF Rate of change of frequency TSO Transmission system operator LVRT Low voltage ride-through WF Wind farm WT Wind turbine WTT WT terminal Under voltage ride-through flag Voltage measurement filter time constant Power measurement filter time constant Reactive power PI controller proportional gain Reactive power PI controller integrator gain Voltage PI controller proportional gain Voltage PI controller integrator gain Voltage deadband lower limit Voltage deadband upper limit Voltage scaling factor for LVRT current Maximum voltage for voltage PI controller integral term Minimum voltage for voltage PI controller integral term User defined bias in voltage reference Voltage threshold for LVRT detection in q control Time constant for reactive power order lag Time duration when post-fault reactive power is injected Maximum active current injection Maximum reactive current injection Minimum reactive current injection Maximum reactive current injection during dip Post-fault reactive current injection ! Active current command to generator system ! Reactive current command to generator system " # WTT active power generation $ # WTT reactive power generation $ # Maximum WTT reactive power $ # Minimum WTT reactive power # WTT voltage % # WTT reactive power reference, or delta voltage reference, depending on WT control mode
doi:10.1016/j.conengprac.2017.01.003 fatcat:m3hxnzc4ovftfbemuxlhhaog4q