Simulation of subsynchronous oscillation caused by fault in converter station of a 1 000 MW unit shafting

CUI Yahui; ZHANG Junjie; SUN Peng; GU Yujiong; JIN Tiezheng; CHEN Zhengfei; ZHAO Zongbin

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Simulation of subsynchronous oscillation caused by fault in converter station of a 1 000 MW unit shafting

Thermal Power Generation Issue 10, (2016)

更新时间：2025-09-28

- Simulation of subsynchronous oscillation caused by fault in converter station of a 1 000 MW unit shafting
- 作者机构：
  
  1. 神华国华(北京)电力研究院有限公司,北京,100025
  2. 华北电力大学能源动力与机械工程学院,北京,102206
  3. 国华绥中发电有限责任公司，辽宁绥中,125222
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK268+.1
- Published Online：15 October 2016，
  
  Published：2016
- 稿件说明：
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CUI Yahui, ZHANG Junjie, SUN Peng, et al. Simulation of subsynchronous oscillation caused by fault in converter station of a 1 000 MW unit shafting[J]. Thermal Power Generation, 2016, (10).
DOI：

CUI Yahui, ZHANG Junjie, SUN Peng, et al. Simulation of subsynchronous oscillation caused by fault in converter station of a 1 000 MW unit shafting[J]. Thermal Power Generation, 2016, (10). DOI：

摘要

因换流站的直流单元发生故障

导致某型超超临界1 000 MW机组发生持续性次同步振荡。为评估该次同步振荡事件对机组轴系安全性的影响

考虑电气和机组轴系的耦合影响

建立了超超临界1 000 MW机组发生次同步振荡的数学模型，并采用数值仿真法

通过在系统电网侧串接1个小幅值的次同步频率电压

激发轴系的次同步振荡

模拟实际次同步振荡在该机组轴系上产生的扭矩。结果表明:该超超临界1 000 MW机组机头转速偏差稳定在0.002 86 p.u.(标幺值，下同)

机尾转速偏差稳定在0.001 20 p.u.

与振型曲线基本吻合(机尾、机头振型比约0.4)；主要振荡频率23.8 Hz

为轴系的第2阶扭振固有频率；低发对轮间扭矩最大

在机组实际运行中

应密切监测低发对轮的状态和扭转振动。

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