Operation Stability Analysis on No.5 Generator Unit in Liujiaxia Hydraulic Power Station

SHEN Weicheng; DONG Kaisong; HU Diangang; JIA Rong; MA Xiping; LI Zhen; ZHENG Xiangyu

doi:10.13296/j.1001-1609.hva.2015.06.008

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Operation Stability Analysis on No.5 Generator Unit in Liujiaxia Hydraulic Power Station

更新时间：2025-04-26

- Operation Stability Analysis on No.5 Generator Unit in Liujiaxia Hydraulic Power Station
- High VoltageApparatus Vol. 51, Issue 6, Pages: 42-46(2015)
- 作者机构：
  
  1. 国网甘肃省电力公司电力科学研究院
  2. 国网甘肃省电力公司
  3. 西安理工大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.06.008
  CLC： TV738
- Published：2015
- 稿件说明：
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[1]沈渭程,董开松,胡殿刚,贾嵘,马喜平,李臻,郑翔宇.刘家峡水电厂5号机组扩修后稳定性分析[J].高压电器,2015,51(06):42-46.

SHEN Weicheng, DONG Kaisong, HU Diangang, et al. Operation Stability Analysis on No.5 Generator Unit in Liujiaxia Hydraulic Power Station[J]. High voltageapparatus, 2015, 51(6): 42-46.
[1]沈渭程,董开松,胡殿刚,贾嵘,马喜平,李臻,郑翔宇.刘家峡水电厂5号机组扩修后稳定性分析[J].高压电器,2015,51(06):42-46. DOI： 10.13296/j.1001-1609.hva.2015.06.008.

SHEN Weicheng, DONG Kaisong, HU Diangang, et al. Operation Stability Analysis on No.5 Generator Unit in Liujiaxia Hydraulic Power Station[J]. High voltageapparatus, 2015, 51(6): 42-46. DOI： 10.13296/j.1001-1609.hva.2015.06.008.

摘要

目前水轮发电机组稳定性问题日益严重

相当一部分水电厂机组在某些运行区域存在振动问题。文中针对刘家峡水电厂5号机组展开试验

研究了引起水轮发电机组运行不稳定的原因

根据刘家峡水电厂机组的实际情况

确定了机组稳定性试验的主要观注测量、测试点的布置以及传感器的选择。针对刘家峡水电厂运行中存在的实际问题

对5号机组分别进行了变转速试验、变励磁试验和变负荷试验。现场试验结果表明:5号机组扩修后

发电机的电磁力平衡状态良好

且机组的振动与蜗壳、顶盖和尾水管内的压力脉动关系密切

但水轮机轴与发电机转子连接不正。

Abstract

To investigate the operation instability of hydraulic generators in Liujiaxia Hydraulic Power Station

tests were conducted on the No.5 generator unit to find the main factors influencing the instability.According to the actual condition

the main observed parameters and the layout of the measuring points were determined

and the sensors were selected. Tests with variable speed

variable excitation and variable load were conducted

respectively. Test results indicate that the electromagnetic force balance of the generator is in good condition after the overhaul of No.5 unit

and the unit’s vibration has close relationship with the pressure fluctuation in volute

roof and tailrace tube

whereas the connection of hydroturbine shaft and the rotor of the generator is not in a line.

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