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Enabling Utility-Scale Solar PV Plants for Electromechanical Oscillation Damping

机译:为机电振荡阻尼启用公用事业尺度太阳能光伏设备

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摘要

This paper presents a new control method to enable large-scale solar photovoltaic (PV) plants to damp electromechanical oscillations. The proposed step-down modulation (SDM) control method is based on active power modulation, and it does not require curtailment as in other approaches. After an oscillation event is detected, the PV panel voltage is controlled to transiently deviate the power from its maximum power point (MPP), this power margin is used to modulate active power until the oscillation event is mitigated. Then, the SDM control restores the PV power to its MPP, and it is reset to operate for the next event. The control design, panel voltage strategy, and implementation is tested in a two-area system. A comparison of the SDM control with a curtailment-based PV damping control is also presented, using a test case of the 179-bus WECC system with six large-scale PV plants, showing the improved damping capability of the proposed method.
机译:本文介绍了一种新的控制方法,使大规模太阳能光伏(PV)植物能够抑制机电振荡。所提出的降压调制(SDM)控制方法基于有功功率调制,并且它不需要缩减,如其他方法。在检测到振荡事件之后,控制PV面板电压瞬时偏离功率从其最大功率点(MPP),该功率裕度用于调制有功功率,直到减轻振荡事件。然后,SDM控制将PV电源恢复到其MPP,并且重置为下一个事件运行。在两区域系统中测试了控制设计,面板电压策略和实现。使用具有六个大型光伏工厂的179公交线WECC系统的测试用例,还介绍了通过基于缩减的基于PV阻尼控制的SDM控制的比较,示出了所提出的方法的提高阻尼能力。

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