In Part I, a method for the Harmonic Power-Flow (HPF) study of three-phase power grids with Converter-Interfaced Distributed Energy Resources (CIDERs) is proposed. The method is based on generic and modular representations of the grid and the CIDERs, and explicitly accounts for coupling between harmonics. In Part II, the HPF method is validated. First, the applicability of the modeling framework is demonstrated on typical grid-forming and grid-following CIDERs. Then, the HPF method is implemented in Matlab and compared against time-domain simulations with Simulink. The accuracy of the models and the performance of the solution algorithm are assessed for individual resources and a modified version of the CIGR\'E low-voltage benchmark microgrid (i.e., with additional unbalanced components). The observed maximum errors are 6.3E-5 p.u. w.r.t. voltage magnitude, 1.3E-3 p.u. w.r.t. current magnitude, and 0.9 deg w.r.t. phase. Moreover, the scalability of the method is assessed w.r.t. the number of CIDERs and the maximum harmonic order ($\leqslant$25). For the maximum problem size, the execution time of the HPF method is 6.52 sec, which is 5 times faster than the time-domain simulation. The convergence of the method is robust w.r.t. the choice of the initial point, and multiplicity of solutions has not been observed.

中文翻译：

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具有转换器接口分布式能源的多相电网谐波潮流研究，第二部分：模型库和验证

在第 I 部分中，提出了一种对具有转换器接口分布式能源 (CIDER) 的三相电网进行谐波潮流 (HPF) 研究的方法。该方法基于电网和 CIDER 的通用和模块化表示，并明确说明谐波之间的耦合。在第 II 部分中，验证了 HPF 方法。首先，在典型的网格形成和网格跟随 CIDER 上证明了建模框架的适用性。然后，HPF 方法在 Matlab 中实现，并与 Simulink 的时域仿真进行比较。模型的准确性和求解算法的性能针对单个资源和 CIGR\'E 低压基准微电网的修改版本（即，具有额外的不平衡组件）进行评估。观察到的最大误差为 6.3E-5 puwrt 电压幅值、1.3E-3 puwrt 电流幅值和 0.9 deg wrt 相位。此外，该方法的可扩展性是通过 CIDER 的数量和最大谐波次数 ($\leqslant$25) 来评估的。对于最大问题尺寸，HPF 方法的执行时间为 6.52 秒，比时域模拟快 5 倍。由于初始点的选择，该方法的收敛性很强，并且没有观察到解的多样性。