| 引用本文: | 刘一鸣,李彦哲,董海鹰,马喜平.计及时滞环节的孤岛微电网控制器参数优化研究[J].电力系统保护与控制,2019,47(12):22-30.[点击复制] |
| LIU Yiming,LI Yanzhe,DONG Haiying,MA Xiping.Study on parameter optimization of islanded microgrid with time delay[J].Power System Protection and Control,2019,47(12):22-30[点击复制] |
|
| 摘要: |
| 小信号模型是微电网控制器参数优化的基础。目前小信号模型是利用一个简化传递函数模型来进行研究，然而分布式电源(DG)在功率调节所建立的小信号模型中还存在时滞问题，特别是逆变器当中变流器功率响应的固有时滞即PWM时滞和数字电路采集方面的时滞问题。为此，不同于传统方法对微电网参数进行优化，而是建立含有时滞模型的小干扰信号模型，然后再进行控制器参数优化。通过对比考虑时滞的方法以及传统方法的差异，揭示参数不同对于系统稳定性的影响，从而提出含有时滞系统的微电网参数优化方法。通过建立含有2个DG的并联微电网孤网系统，比较了系统特性的差异，验证了所提方法的合理性和优越性。 |
| 关键词: 孤岛微电网 时滞系统 小信号模型 参数优化 系统稳定性 |
| DOI：10.7667/PSPC20191203 |
| 投稿时间：2018-05-03修订日期：2018-07-23 |
| 基金项目:国家自然科学基金项目资助(61663019);国网甘肃省电力公司科技项目资助(522722160021) |
|
| Study on parameter optimization of islanded microgrid with time delay |
| LIU Yiming,LI Yanzhe,DONG Haiying,MA Xiping |
| (School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730050, China) |
| Abstract: |
| The small signal model is the basis of microgrid parameter optimization, which usually employs a simplified transfer function model to conduct research. However, the small signal model of Distributed Generation (DG) based on power regulation has time delay problems, especially the inherent time delay of the inverter’s power response namely PWM delay and the acquisition delay of digital circuits. Therefore, differing from the traditional microgrid parameter optimization, a small signal model with time delay effect is established for the microgrid parameter optimization. By comparing the method with time delay considered and the traditional method, the different effects upon the system stability of different parameters are revealed, and the microgrid parameter optimization with time delay system is proposed. With simulations conducted upon the parallel islanded microgrid system with 2 DGs, the characteristic differences of systems are compared and the rationality and superiority of the proposed method is verified. This work is supported by National Natural Science Foundation of China (No. 61663019) and Science and Technology Project of State Grid Gansu Electric Power Company (No. 522722160021). |
| Key words: islanded microgrid time-delay system small signal model parameter optimization system stability |
