论文标题
基于逆变器的电力网络的强大分散二级控制方案
Robust Decentralized Secondary Control Scheme for Inverter-based Power Networks
论文作者
论文摘要
以逆变器为主的微电网迅速成为未来电力系统的关键基础。他们依靠可以在极端事件中提供可靠性和弹性的集中控制器。尽管如此，由于网络物理攻击或自然灾害引起的沟通故障可能会使岛的微电网的自主操作具有挑战性。本文研究了一种统一的分散二级控制方案，该方案可与逆变器时钟同步误差稳健，并且可以无缝地应用于网格遵循或格式形成的控制架构。所提出的方案克服了众所周知的稳定问题，这是由局部积分控制器的并行操作引起的。提供了稳定性的理论保证，以及标准，以适当调整二级控制增长，以实现良好的频率调节性能，同时确保公平的能力共享。通过在具有四个网格形成逆变器的5个总线微电网上的模拟来证明我们方法消除稳态频率偏差的功效。
Inverter-dominated microgrids are quickly becoming a key building block of future power systems. They rely on centralized controllers that can provide reliability and resiliency in extreme events. Nonetheless, communication failures due to cyber-physical attacks or natural disasters can make autonomous operation of islanded microgrids challenging. This paper examines a unified decentralized secondary control scheme that is robust to inverter clock synchronization errors and can be seamlessly applied to grid-following or grid-forming control architectures. The proposed scheme overcomes the well-known stability problem that arises from parallel operation of local integral controllers. Theoretical guarantees for stability are provided along with criteria to appropriately tune the secondary control gains to achieve good frequency regulation performance while ensuring fair power sharing. The efficacy of our approach in eliminating the steady-state frequency deviation is demonstrated through simulations on a 5-bus microgrid with four grid-forming inverters.
