DC microgrid systems (DCMGs) feed power to constant power loads (CPLs) via transmission lines. Although these systems are commonly used worldwide, CPLs have negative impedance effects. These loads can significantly degrade the system stability. Therefore, stability study is very important to avoid inefficient operations. The model proposed in this article can be derived using a combination of the direct quadrature (DQ) method and the generalized state-space averaging (GSSA) method. This model is suitable for analyzing the system stability using the eigenvalue theorem. For stability analysis, the proposed (DCMGs) will be unstable before reaching the rated power when the irradiance is equal to 0 W/m 2 . Consequently, the loop-cancellation technique is applied to mitigate the unstable operation until the operation at the rated power can be achieved. Experimental and simulation results were used to confirm the theoretical analysis. The system performed well, and the results proved that the system could be stabilized using the proposed technique.

中文翻译：

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使用环路消除技术稳定直流微电网系统


直流微电网系统 (DCMG) 通过输电线路向恒定功率负载 (CPL) 供电。尽管这些系统在全球范围内广泛使用，但 CPL 具有负阻抗效应。这些负载会显着降低系统稳定性。因此，稳定性研究对于避免低效运行非常重要。本文提出的模型可以使用直接求积（DQ）方法和广义状态空间平均（GSSA）方法的组合来推导。该模型适合利用特征值定理分析系统稳定性。对于稳定性分析，当辐照度等于0 W/m 2 时，所提出的（DCMG）在达到额定功率之前将不稳定。因此，采用环路消除技术来减轻不稳定的运行，直到能够实现额定功率下的运行。实验和模拟结果用于证实理论分析。该系统表现良好，结果证明使用所提出的技术可以使系统稳定。