Yuan Dongmei, Lu Zhigang, Zhang Jiangfeng, Guo Xiaoqiang, Geng Lijun
Institute of Electrical Engineering, Yanshan University, Qinhuangdao 066004, PR China.
Institute of Electrical Engineering, Yanshan University, Qinhuangdao 066004, PR China.
ISA Trans. 2022 Oct;129(Pt B):345-360. doi: 10.1016/j.isatra.2022.02.052. Epub 2022 Mar 15.
To improve the stability and economic operation performance of multi-distributed energy resources in networked islanded microgrid, a distributed and integrated control strategy is designed in this study. The strategy is based on the communication network in an islanded microgrid, which is able to achieve minimal generation cost, reliable communication, and stable voltage and frequency. These targets are achieved through the following methods. Firstly, a power regulation part is combined with droop controller to constitute an improved primary control, which can take the line loss factor into account and adjust the output power of each distributed energy resource to its optimal value. Secondly, an optimal path reconstruction method and a Kalman filter estimation method with sliding mode controller are developed to address the communication interruption problem in communication channels and output channels, respectively. In the end, the secondary controller is used to regulate voltage and frequency, and a small signal model method is applied to analyze the impact on the whole system when these designs are applied. The effect of the proposed strategies has been verified by the related case studies.
为提高联网孤岛微电网中多分布式能源的稳定性和经济运行性能，本研究设计了一种分布式集成控制策略。该策略基于孤岛微电网中的通信网络，能够实现发电成本最小化、可靠通信以及稳定的电压和频率。这些目标通过以下方法实现。首先，将功率调节部分与下垂控制器相结合，构成改进的一次控制，该控制可考虑线路损耗因子，并将各分布式能源的输出功率调整到最优值。其次，分别开发了最优路径重构方法和带滑模控制器的卡尔曼滤波器估计方法，以解决通信通道和输出通道中的通信中断问题。最后，利用二次控制器调节电压和频率，并应用小信号模型方法分析这些设计应用于整个系统时的影响。相关案例研究验证了所提策略的效果。
