Influence of Control Delay on Synchronization Stability of Non-synchronous Generator Sources

被引：0
|
作者：
Zhang Y. [1 ]
Liu K. [1 ]
Cheng Y. [1 ]
Han Y. [1 ]
机构：
[1] Key Laboratory of Smart Grid (Tianjin University), Ministry of Education, Nankai District, Tianjin
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 06期
关键词：
control delay; phase-locked loop; phase-plane analysis; PI parameters; synchronization stability;
D O I：
10.13335/j.1000-3673.pst.2022.0270
中图分类号：
学科分类号：
摘要：
The new energy power generation system connected to the grid with the grid-connected inverters achieves the synchronization with the rotating power source by controllers. This is different from the synchronized mechanism of the synchronous generator sources, usually known as the non-synchronous generator sources. The increasing non-synchronous generator sources in a power system renders the synchronization stability of the power grid a new form. To reveal the influence of the control delay on the synchronization stability of the non-synchronous generator sources, this paper analyzes the mechanisms of the phase locked loop’s sampling delay, the pulse width modulation’s one-step-delay and the insulated-gate bipolar transistor’s dead-time delay. The mathematical models and transfer functions of the control links considering their time delay. Based on this, the voltage angle difference equation between the non-synchronous generator source and the grid is derived, and the phase-plane analysis is used to analyze the synchronization stability of the system. The theoretical analysis and phase-plane analysis’s results indicate that the delay control deteriorates the system synchronization stability. It is of practical significance to increase the system damping to compensate the control delay’s influence. In practical, decreasing the integral coefficient appropriately is a feasible solution to improve the system damping. © 2023 Power System Technology Press. All rights reserved.
引用
收藏
页码：2414 / 2422
页数：8
相关论文
共 20 条
  • [1] Zheng XU, Physical mechanism and research approach of generalized synchronous stability for power systems[J], Electric Power Automation Equipment, 40, 9, pp. 1-9, (2020)
  • [2] TU Chunming, XIE Weijie, XIAO Fan, Analysis of influence of control delay on stability of virtual synchronous machine[J], Power System Technology, 44, 8, pp. 3021-3028, (2020)
  • [3] WANG Qi, QIN Wenping, ZHANG Yu, Robust current control strategy for LCL-type grid-connected converter based on additional unit time-delay feedback[J], Electric Power Automation Equipment, 40, 9, pp. 203-210, (2020)
  • [4] HE Shiming, XIONG Jian, DAI Dayi, Modeling，control and stability analysis of three-phase voltage source PWM rectifier[J], Power System Technology, 43, 6, pp. 2049-2057, (2019)
  • [5] XU Dezhi, WANG Fei, MAO Hualong, Modeling and analysis of harmonic interaction between multiple grid-connected inverters and the utility grid[J], Proceedings of the CSEE, 33, 12, pp. 64-71, (2013)
  • [6] HE Shiming, XIONG Jian, Time delay compensation based on Newton interpolation for inverter-side current feedback of LCL-type grid-tied inverter[J], Power System Technology, 44, 12, pp. 4766-4772, (2020)
  • [7] ZHU Kunlong, SUN Pengju, WANG Lin, High robustness weighted average current control for LCL-type grid-connected inverter in a weak grid[J], Proceedings of the CSEE, 40, 11, pp. 3592-3601, (2020)
  • [8] GAO Benfeng, Ren LI, YANG Daye, Damping characteristics and countermeasure of DFIG sub-synchronous oscillation[J], Electric Power Automation Equipment, 35, 12, pp. 11-20, (2015)
  • [9] CHEN Yaai, LIU Jingdong, ZHOU Jinghua, Fault ride-through control strategy for solar grid-connected inverters[J], Proceedings of the CSEE, 34, 21, pp. 3405-3412, (2014)
  • [10] ZHANG Yu, CAI Xu, ZHANG Chen, Transient synchronization stability analysis of voltage source converters：a review[J], Proceedings of the CSEE, 41, 5, pp. 1687-1701, (2021)
12