Abstract The increase of decentralized power generation in low voltage grids imposes new challenges on the conventional operating strategies for electrical grids, as power transmission used to predominantly pass from high voltage levels to low voltage levels. Distributed generation in low voltage grids lead to unprecedented voltage limit violations, which can efficiently be solved by implementing new control systems e.g. regulated distribution transformers (RDT) or local voltage control (e.g. Q(V)). Both correspond to closed-loop control systems and thus, are prone to stability issues and possible interactions with other control elements. Furthermore, the nonlinear characteristics of RDTs complicate the systems' stability analysis. This paper introduces the harmonic balance method as an approach to characterize the nonlinear behavior of an RDT and assess the system stability as well as possible interactions with other linear controllers in the electrical grid.

中文翻译：

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通过谐波平衡法分析调节配电变压器 (RDT) 与本地电压控制 Q(V) 之间的相互作用

摘要 低压电网中分散发电的增加对传统的电网运行策略提出了新的挑战，因为电力传输过去主要是从高电压水平传递到低电压水平。低压电网中的分布式发电导致前所未有的电压限制违规，这可以通过实施新的控制系统（例如稳压配电变压器 (RDT) 或本地电压控制（例如 Q(V)）来有效解决。两者都对应于闭环控制系统，因此容易出现稳定性问题并可能与其他控制元件发生交互。此外，RDT 的非线性特性使系统的稳定性分析变得复杂。