Distinct characteristics of transmission and distribution power grids typically necessitate different control algorithms, especially at the primary control level where quick responses are required. Accordingly, various droop control schemes have been developed due to specific types of power grid impedances. Therefore, controllers at higher levels often have to be redesigned whenever a different power grid is considered, hence, incurring higher cost and effort. As a way to overcome that problem, in this work, a unified secondary controller using distributed control theory is designed for different droop schemes associated with distributed battery storage in different grid conditions. The control design follows the consensus theory, originally designed for multi-agent systems, to control the frequency and voltage at the point of common coupling (PCC), synchronize energy levels, and proportionally share active and reactive powers of battery storage systems. A sufficient condition for the upper bound of communication delays between storage systems is derived to ensure system stability. Several scenarios are studied using a modified IEEE 118-bus benchmark to support the theoretical results of the proposed approach.

中文翻译：

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电力系统中多种主控电池存储的统一分布式控制


输配电网的独特特性通常需要不同的控制算法，特别是在需要快速响应的初级控制层面。因此，由于电网阻抗的特定类型，已经开发了各种下垂控制方案。因此，每当考虑不同的电网时，高层控制器往往必须重新设计，从而导致更高的成本和精力。作为克服该问题的一种方法，在这项工作中，采用分布式控制理论的统一次级控制器被设计用于不同电网条件下与分布式电池存储相关的不同下垂方案。控制设计遵循最初为多智能体系统设计的共识理论，控制公共耦合点（PCC）的频率和电压，同步能量水平，并按比例共享电池存储系统的有功和无功功率。推导了存储系统间通信时延上限的充分条件，保证系统稳定性。使用修改后的 IEEE 118 总线基准研究了几种场景，以支持所提出方法的理论结果。