Subsynchronous oscillation torsional vibration model and simulation for a supercritical 600MW unit with high voltage direct current transmission

CUI Yahui; ZHANG Junjie; ZHAO Zongbin; GU Yujiong; JIN Tiezheng; XUE Chengyong; QU Fulai

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Subsynchronous oscillation torsional vibration model and simulation for a supercritical 600MW unit with high voltage direct current transmission

更新时间：2025-09-28

- Subsynchronous oscillation torsional vibration model and simulation for a supercritical 600MW unit with high voltage direct current transmission
- Thermal Power Generation Vol. 45, Issue 6, Pages: 106-110(2016)
- 作者机构：
  
  1. 神华国华(北京)电力研究院有限公司
  2. 华北电力大学能源动力与机械工程学院
  3. 神华内蒙古国华呼伦贝尔发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM721.1
- Published：2016
- 稿件说明：
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CUI Yahui, ZHANG Junjie, ZHAO Zongbin, et al. Subsynchronous oscillation torsional vibration model and simulation for a supercritical 600MW unit with high voltage direct current transmission[J]. Thermal power generation, 2016, 45(6): 106-110.
DOI：

CUI Yahui, ZHANG Junjie, ZHAO Zongbin, et al. Subsynchronous oscillation torsional vibration model and simulation for a supercritical 600MW unit with high voltage direct current transmission[J]. Thermal power generation, 2016, 45(6): 106-110. DOI：

摘要

远距离、超高压输电系统引发的机组次同步振荡(SSO)问题日益突出

为深入研究SSO下机组轴系的安全性

本文针对某超临界600 MW机组频繁出现的低幅值SSO问题

综合考虑电网、发电机和汽轮机轴系的相互影响

建立机组电网耦合作用下的扭转振动模型

利用时域仿真法

模拟该机组的SSO现象

得到机组发生SSO过程中轴系承受的扭矩。该模型为分析超临界600 MW机组发生SSO时的扭转振动安全性提供计算基础。

Abstract

Subsynchronous oscillation(SSO)problem caused by remote transmission and extra high voltage transmission is increasingly outstanding.To deeply investigate the safety problem of unit shaft system under SSO condition

according to the frequent low-amplitude subsynchronous oscillation problem in a supercritical 600 MW unit

the torsional vibration model under the coupling effect of power network

generator and unit was established

comprehensively considering the interactions between power network

generator shafting and turbine shafting.Moreover

by time-domain simulation method

the above torsional vibration model was applied to simulate the SSO phenomenon occurred in this unit

and the torque the shafting bearing during the SSO process was obtained.The proposed model provides calculation basis for analyzing torsional vibration safety of supercritical 600 MW units when subsynchronous oscillation occurred.

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