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风光储联合发电系统的建模及并网控制策略

, PP. 196-204

Keywords: 风光储联合,系统建模,平抑功率波动,低电压穿越

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Abstract:

针对间歇性能源并网出力波动以及不具备故障暂态电压支持能力特征,提出一种有效抑制功率波动且改善低电压穿越能力的风光储联合发电系统模型及其控制策略。风电和光伏系统均采用基于最大功率控制的双环控制策略,其外环采用功率控制内环应用电流控制;储能系统利用电压和频率设定值同母线测量值比较获得功率控制的参考值,经功率、电流环控制实现了抑制功率波动及支撑故障暂态电压。通过包含风光单独、风光互补以及风光储联合运行电力系统仿真计算说明了模型对电网的功率波动和暂态电压稳定性的贡献。仿真结果表明,本文提出的风光储联合发电系统模型及控制策略可有效平抑风光系统功率波动,保证了其低电压穿越的实现及电网安全稳定。

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