Impact of PID power regulation of hydroelectric unit on frequency stability for asynchronous sending-end power grid

被引：0
|
作者：
Hu L. [1 ]
Shen J. [2 ]
Zeng Y. [3 ]
Liu B. [2 ]
Wu Y. [1 ]
Wang Z. [1 ]
机构：
[1] Huaneng Lancang River Hydropower Co., Ltd., Kunming
[2] School of Hydraulic Engineering, Dalian University of Technology, Dalian
[3] Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Asynchronous interconnection; Frequency stability; Hydroelectric units; PID regulation; Primary frequency regulation;
D O I：
10.16081/j.epae.201911016
中图分类号：
学科分类号：
摘要：
Taking Yunnan Power Grid, the first asynchronous provincial power grid in China, as the engineering background, a frequency stability analysis approach of asynchronous sending-end power grid is proposed considering the PID(Proportion-Integration-Differentiation) power regulation of hydroelectric units. This approach analyzes oscillation characteristics of output power caused by the fixed-value adjustment and primary frequency regulation because of overshoot and external incentives. As a result, the reasons and period of oscillation motivated by initial interfere are revealed. At the same time, this approach presents the mechanism of continuous oscillation and its positive/negative effects for the regulation system under external periodic excitation. The effective of proposed method is verified by a case study regarding actual frequency oscillation of Yunnan Power Grid. Moreover, an improved strategy is proposed to avoid frequency oscillation of the power grid caused by PID regulation of hydroelectric units. Simulative results demonstrate that this strategy effectively alleviates the ultra-low frequency oscillation of hydroelectric asynchronous sending-end power grid. © 2019, Electric Power Automation Equipment Press. All right reserved.
引用
收藏
页码：217 / 223
页数：6
相关论文
共 21 条
  • [1] Chen Y., Liu D., Wu J., Et al., Emergency generator tripping control method for sending end of asynchronous interconnection system, Electric Power Automation Equipment, 38, 8, pp. 131-137, (2018)
  • [2] Cheng C., Li G., Cheng X., Et al., Large-scale ultra high voltage direct current hydropower absorption and its experiences, Proceedings of the CSEE, 35, 3, pp. 549-560, (2015)
  • [3] Sun H., Tang Y., Ma S., A commentary on de-finition and classification of power system stability, Power System Technology, 30, 17, pp. 31-35, (2006)
  • [4] Villegas H.N., Electromechanical oscillations in hydro-dominant power systems: an application to the Colombian power system, (2011)
  • [5] Demello F., Concepts of synchronous machine stability as affected by excitation control, IEEE Transactions on Power Apparatus and Systems, 88, 4, pp. 316-329, (1969)
  • [6] Peng M., Mechanism analysis and optimization strategy of active power reversal caused by abnormal measurement of flexible HVDC in asynchronous interconnection project, Electric Power Automation Equipment, 38, 8, pp. 218-223, (2018)
  • [7] Rimorov D., Kamwa I., Joos G., Quasi-steady-state approach for analysis of frequency oscillations and damping controller design, IEEE Transactions on Power Systems, 31, 4, pp. 3212-3220, (2016)
  • [8] Shahrodi E.B., Morched A., Dynamic behaviour of AGC systems including the effects of nonlinearities, IEEE Transactions on Power Apparatus & Systems, 12, pp. 3409-3415, (1985)
  • [9] Huang H., Li F., Sensitivity analysis of load-damping charac-teristic in power system frequency regulation, IEEE Transactions on Power Systems, 28, 2, pp. 1324-1335, (2013)
  • [10] Jiang S., Chen Q., Cai W., Simulation optimi-zing strategy for parameters of hydro-governor, Proceedings of the CSEE, 28, 3, pp. 102-106, (2008)
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