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首页> 外文期刊>Energies >An Energy-Based Control Strategy for Battery Energy Storage Systems: A Case Study on Microgrid Applications
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An Energy-Based Control Strategy for Battery Energy Storage Systems: A Case Study on Microgrid Applications

机译：电池储能系统基于能量的控制策略：微电网应用案例研究

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Battery energy storage systems (BESSs) with proportional-integral (PI) control methods have been widely studied in microgrids (MGs). However, the performance of PI control methods might be unsatisfactory for BESSs due to the nonlinear characteristics of the system. To overcome this problem, an energy-based (EB) control method is applied to control the converter of a BESS in this study. The EB method is a robust nonlinear control method based on passivity theory with good performance in both transient and steady states. The detailed design process of the EB method in the BESS by adopting an interconnection and damping assignment (IDA) strategy is described. The design process comprises three steps: the construction of the port-controlled Hamiltonian model, the determination of the equilibrium point and the solution of the undetermined matrix. In addition, integral action is combined to eliminate the steady state error generated by the model mismatch. To establish the correctness and validity of the proposed method, we implement several case simulation studies based on a test MG system and compare the control performance of the EB and PI methods carefully. The case simulation results demonstrate that the EB method has better tracking and anti-disturbance performance compared with the classic PI method. Moreover, the proposed EB method shows stronger robustness to the uncertainty of system parameters.
机译：具有比例积分（PI）控制方法的电池储能系统（BESS）已在微电网（MG）中得到了广泛的研究。但是，由于系统的非线性特性，对于BESS，PI控制方法的性能可能不尽人意。为了克服这个问题，本研究采用基于能量的（EB）控制方法来控制BESS的转换器。 EB方法是一种基于无源性理论的鲁棒非线性控制方法，在瞬态和稳态下均具有良好的性能。描述了在BESS中采用互连和阻尼分配（IDA）策略的EB方法的详细设计过程。设计过程包括三个步骤：端口控制的汉密尔顿模型的构造，平衡点的确定以及矩阵的待定解。另外，积分作用被组合以消除由模型失配产生的稳态误差。为了确定该方法的正确性和有效性，我们基于一个测试MG系统进行了一些案例模拟研究，并仔细比较了EB和PI方法的控制性能。案例仿真结果表明，与经典的PI方法相比，EB方法具有更好的跟踪和抗干扰性能。此外，所提出的EB方法对系统参数的不确定性表现出更强的鲁棒性。

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