论文标题
针对具有发电机和逆变器的网络的最佳初级和次要控制设计
Towards Optimal Primary- and Secondary-control Design for Networks with Generators and Inverters
论文作者
论文摘要
对于主要具有大同步发电机（SG）的电源网格，存在着重要的工作桥接优化和控制任务。此类努力的通用工作流程需要：表征控制算法和SG动力学的稳态状态；评估所得操作点在最佳调度任务方面的最佳性；并开处方控制参数，以确保（在合理的环境扰动下）被考虑的控制能够将系统稳态推向最佳性。上述方法的经过良好研究的实例包括设计：i）自动生成控制（AGC）参与因子确保经济最佳性，ii）conforseor-drop斜坡以确保权力共享。认识到未来的电网将以不同的控制结构的各种SG和基于逆变器的资源（IBRS）的多样化组合，因此该工作研究了此上下文中优化控制工作流的不同步骤。考虑到IBR和SGS的主动功率频率动力学的代表性模型，提出了稳态的表征（具有和不使用次级频率控制）。然后，将有活跃的下垂斜率和AGC参与因子的条件得出，以确定所需的功率共享，并确保在各种功率需求下经济上最佳的运行。
For power grids predominantly featuring large synchronous generators (SGs), there exists a significant body of work bridging optimization and control tasks. A generic workflow in such efforts entails: characterizing the steady state of control algorithms and SG dynamics; assessing the optimality of the resulting operating point with respect to an optimal dispatch task; and prescribing control parameters to ensure that (under reasonable ambient perturbations) the considered control nudges the system steady state to optimality. Well studied instances of the aforementioned approach include designing: i) automatic generation control (AGC) participation factors to ensure economic optimality, and ii) governor frequency-droop slopes to ensure power sharing. Recognizing that future power grids will feature a diverse mix of SGs and inverter-based resources (IBRs) with varying control structures, this work examines the different steps of the optimization-control workflow for this context. Considering a representative model of active power-frequency dynamics of IBRs and SGs, a characterization of steady state is put forth (with and without secondary frequency control). Conditions on active-power droop slopes and AGC participation factors are then derived to ascertain desired power sharing and ensure economically optimal operation under varying power demands.
