论文标题
电网中的分布式频率控制，惯性较低且变化
Distributed Frequency Control in Power Grids with Low and Time-Varying Inertia
论文作者
论文摘要
本文提出了一种分布式频率控制方法，用于在低和随时间变化的惯性下，由于可再生能源（RE），在低且随时间变化的惯性下，与逆变器连接的资源高渗透。我们使用分布式亚级别算法提供了分布式虚拟惯性（VI）分配方法。我们在完整和稀疏的通信体系结构下实施分布式控制策略。分布式的完整和稀疏的通信控制器达到了与集中控制器的可比性能，并在6〜s内稳定了测试系统。我们研究控制器性能对相位角度与频率偏差，梯度阶梯尺寸以及允许惯性变化速率（ROCOI）系数变化的敏感性。我们观察到，状态的定居时间以及控制器的性能和努力容易受到梯度步长的变化，并且在频率和角度偏差上的客观权重的变化。虽然角度与频率偏差的较高客观重量对他们的沉降时间产生了积极影响，但它会对控制器的性能和控制工作产生负面影响。这项工作的影响是提出分布式控制方案，作为在与主要和次要控制之前或与一级控制之前或与一致的新机制，以安全地调节未来电网中的频率。
This paper presents a distributed frequency control method for power grids with high penetration of inverter-connected resources under low and time-varying inertia due to renewable energy (RE). We provide a distributed virtual inertia (VI) allocation method using the distributed subgradient algorithm. We implement our distributed control strategy under full and sparse communication architectures. The distributed full and sparse communication controllers achieve comparable performance to a centralized controller and stabilize the test system within 6~s. We study the sensitivity of the controller performance to varying objective function weights on phase angle versus frequency deviation, gradient step sizes, and allowed rate of change of inertia (RoCoI) coefficients. We observe that the settling time of the states and the controller performance and effort are susceptible to changes in the gradient step size and objective weights on the frequency and angle deviation. While a higher objective weight on angle versus frequency deviations positively affects their settling times, it negatively impacts controller performance and control effort. The impact of this work is to propose distributed control schemes as new mechanisms that act before or in alignment with primary and secondary control to safely regulate the frequency in future power grids.
