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首页> 外文期刊>International Journal of Adaptive Control and Signal Processing >Power sharing adaptive control strategy for a microgrid with multiple storage and renewable energy sources
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Power sharing adaptive control strategy for a microgrid with multiple storage and renewable energy sources

机译：具有多个存储和可再生能源的微电网的功率共享自适应控制策略

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With the rapid growth of single-phase renewable energy source units within three-phase microgrids, the accuracy of the power sharing per phase among distributed generation (DG) units is necessary. This paper proposes an adaptive power control strategy based on new sliding mode control for islanding operation of a microgrid with multiple three-phase and single-phase DGs. The studied microgrid consists of two three-phase photovoltaic (PV) arrays and three single-phase DG units, which include PV, fuel cell, and battery systems. In order to control the three-phase DGs properly, an observer is used to estimate the uncertain system parameters. Then, according to the estimated values, a controller is adapted to the new system conditions. In this control strategy, one of the three-phase PV arrays is responsible for adjusting the voltage and frequency, and the other is responsible for controlling the load current to manage the power of three-phase inverters. To control the single-phase DGs, their power and voltage references are assigned based on the corresponding phase of the three-phase DGs responsible for power and voltage control. Subsequently, the power and voltage control operation is performed in a per-unit system. The proposed control strategy is strongly stable against variation of conditions, disturbances, and microgrid parameter uncertainties, and it regulates the active and reactive powers injected by DGs. The feasibility of the proposed control strategy is validated using simulation studies on a multibus islanded microgrid with balanced and unbalanced loading conditions via MATLAB/Simulink software. The results indicate that the proposed approach is able to provide faster response and lower steady-state error compared with the conventional proportional integral controller.
机译：随着三相微电网中单相可再生能源单元的快速增长，分布式发电（DG）单元中每相功率共享的准确性是必要的。针对具有多个三相和单相DG的微电网的孤岛运行，本文提出了一种基于新型滑模控制的自适应功率控制策略。所研究的微电网由两个三相光伏（PV）阵列和三个单相DG单元组成，其中包括PV，燃料电池和电池系统。为了适当地控制三相DG，使用观测器来估计不确定的系统参数。然后，根据估计值，使控制器适应新的系统条件。在这种控制策略中，三相PV阵列之一负责调节电压和频率，另一个负责控制负载电流以管理三相逆变器的功率。为了控制单相DG，根据负责功率和电压控制的三相DG的相应相位来分配其功率和电压参考。随后，在每单位系统中执行电源和电压控制操作。所提出的控制策略对条件，干扰和微电网参数不确定性的变化具有很强的稳定性，并且可以调节由DG注入的有功功率和无功功率。通过MATLAB / Simulink软件在负载平衡和不平衡的多总线孤岛微电网上进行仿真研究，验证了所提出控制策略的可行性。结果表明，与常规比例积分控制器相比，该方法能够提供更快的响应和更低的稳态误差。

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