以激励为导向的配电网分布式电压调节

针对高渗透率可再生能源导致的配电网电压波动及越限问题，提出了基于分布式机组快速电压支撑能力的辐射状配电网分布式电压调节算法。不同于已有采用直接控制方式的分布式电压调节，利用激励信号间接控制分布式机组来实现配电网分布式电压调节。在所提的电压调节问题中，不但考虑了配电网从主网购入有功的成本，同时考虑了电压调节过程中配电网内附加无功的平衡。基于障碍函数法和对偶上升算法，将所提电压调节问题转化为一个可由配电网各节点协同求解的分布式优化问题，并提出了相应的以激励为导向的分布式电压调节框架。在该框架下，配电网运营商根据各节点反馈的出力决策，持续更新并发布节点有功及无功激励信号来协调各节点的出力，从而实现配电网电压的分布式调节。仿真研究证明了该算法在配电网电压陡降和电压突升情形下的有效性。

Incentive-oriented Distributed Voltage Regulation in Distribution Networks

We propose a distributed voltage regulation algorithm for radial distribution networks using the fast voltage support provided by distributed generation to mitigate voltage fluctuations and voltage limit violation in distribution networks due to high-penetration renewable energy. Contrary to the currently used distributed voltage regulation approaches, which control distributed generations directly, we achieve distributed voltage regulation in distribution networks by controlling distributed generations indirectly using incentives. Moreover, we also consider the costs of active power purchased from the main grid and the balance of additional reactive power due to voltage regulation in distribution networks in the proposed voltage regulation problem. Based on the barrier function method and dual-ascent algorithm, we transform the proposed voltage regulation problem into a distributed optimization problem that can be resolved cooperatively by buses of the distribution network. Furthermore, we propose a corresponding incentive-oriented distributed voltage regulation framework. Under this framework, considering the output decision feedback from buses, the distribution system operator continuously updates and broadcasts incentives for active and reactive power outputs to coordinate the outputs of buses, thereby indirectly achieving voltage regulation. The effectiveness of the proposed algorithm for voltage drop and rise in distribution networks is validated by the case studies.