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首页> 外文期刊>Journal of Hydroinformatics >Load rejection transient with joint closing law of ball-valve and guide vane for two units in pumped storage power station
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Load rejection transient with joint closing law of ball-valve and guide vane for two units in pumped storage power station

机译：抽水蓄能电站中两个机组的球阀和导向叶片共同关闭规律引起的甩负荷瞬变

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摘要

It is more dangerous for the units sharing the same division pipeline system than those sharing individual system during the load rejection transient for a high water head pumped storage station. A new mathematical model for the load rejection transient in these two units sharing the same division pipeline was proposed using method of internal characteristic (MIC). The transient relationship between the geometric parameters and working parameters was established based on the dynamic equations of the hydraulic machinery. Meanwhile, the calculation of the load rejection transient was accomplished and compared with field experimental data from a pumped storage power station. The relative errors of the maximum rotational speed of the two units between the predicted results and the experimental data were −5.9% and −4.44%, respectively, and the relative errors of the maximum rising of hydraulic pressure were −6.7% and −6.98%, respectively. The results met with the design specification requirements, which indicated that the proposed new MIC could completely predict the load rejection transient in these two units with joint closing law of ball-valve and guide vane, and the corresponding calculated results were acceptable and reliable. The MIC is also applicable to the transient investigation of hydraulic systems with hydraulic machinery.
机译：对于高水头抽水蓄能站，在甩负荷瞬变期间，与共用单个分配系统的单元相比，与共用单个系统的单元相比，危险更大。利用内部特性（MIC）的方法，提出了共享同一分流管线的两台机组甩负荷瞬态的新数学模型。基于液压机械动力学方程建立了几何参数与工作参数之间的瞬态关系。同时，完成了甩负荷瞬态的计算，并与抽水蓄能电站的现场实验数据进行了比较。预测结果与实验数据之间，两个单元的最大转速的相对误差分别为-5.9％和-4.44％，而液压最大上升的相对误差为-6.7％和-6.98％ ， 分别。结果符合设计规范要求，表明所提出的新型MIC能够通过球阀和导叶的联合闭合定律完全预测这两个单元的甩负荷瞬变，并且相应的计算结果是可接受的和可靠的。 MIC也适用于液压机械对液压系统的瞬态研究。

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  • 来源
    《Journal of Hydroinformatics》 |2018年第2期|301-315|共15页
  • 作者

    Xiaoqin Li; Xuelin Tang; Xiaoyan Shi; Honghao Chen; Changsheng Li;

  • 作者单位

    Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing 100083, China and College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;

    Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing 100083, China and College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;

    Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing 100083, China and College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;

    Shenzhen Pumped Storage Co., Ltd, Power Generation Company, CSG, Shenzhen 518000, China;

    Henan Tianchi Pumped Storage Co., Ltd, Nanyang 473000, China;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ball-valve; joint closing law; load rejection transient; method of internal characteristic; pumped storage power station;

    机译：球阀;联合关闭定律;甩负荷瞬变;内部特性法;抽水蓄能电站;

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