基于飞轮储能单元的动态电压恢复器优化补偿方法研究

配电系统中的电能质量问题一般与电压暂降有关，而飞轮储能装置具有效率高、功率大等特性，可用来解决电能质量问题。本文用一种基于飞轮储能系统的动态电压恢复器（DVR）解决配电网电压暂降问题，建立含飞轮储能单元并联型DVR模型，重点分析并联型飞轮储能系统的工作模式及相对应的充放电控制策略。配电网中DVR模型主电路采用混合级联H桥拓扑结构，在补偿控制策略方面，提出一种优化补偿控制策略，该方法可以减少所需注入DVR的有功功率和延长系统的补偿时间。通过仿真分析与实验验证，表明了所提模型以及相关补偿控制方法可行性和有效性。

Research on Optimization of Dynamic Voltage Restorer Compensation Method Based on Flywheel Energy Storage Unit

Most power quality problems in distribution systems are related to voltage sags, Flywheel energy storage device possesses the characteristic of high-efficiency and large-power discharge, so it can be used to improve power quality.In this paper,a flywheel energy storage system for dynamic voltage restorer (DVR) based on solving distribution network voltage sags, build with flywheel energy units in parallel type model of the DVR, focusing on analysis of parallel type flywheel storage system working mode and corresponding to the charge and discharge control strategy.Distribution network model of the DVR main circuit adopts hybrid cascaded H-bridge topology and in the compensation control strategy and put forward a optimal compensation control strategy, this method can reduce the DVR injection active power and extending the system to compensate the time.Through the simulation analysis and experimental verification, the feasibility and effectiveness of the proposed model and the related compensation control method are demonstrated.