发电技术 ›› 2018, Vol. 39 ›› Issue (1): 23-29.DOI: 10.12096/j.2096-4528.pgt.2018.004

• 火电及环境保护 • 上一篇    下一篇

基于温度场变化的发电机定子端部绕组振动主动控制

刘石1,2(),万文军1,2,高庆水1,2,杨毅1,2,张征平1,2,夏鲜良3,甘超齐4,杨群发5,张楚1,2,黄正1   

  1. 1 广东电网有限责任公司电力科学研究院,广东省 广州市 510080
    2 广东电科院能源技术有限责任公司,广东省 广州市 510080
    3 上海电气电站设备有限公司发电机厂,上海市 闵行区 201100
    4 广东国华粤电台山发电有限公司,广东省 台山市 529200
    5 广东珠海金湾发电有限公司,广东省 珠海市 519000
  • 收稿日期:2017-12-01 出版日期:2018-02-28 发布日期:2018-03-27
  • 作者简介:刘石(1974),男,博士,首席技术专家,研究方向为电力设备振动控制与故障诊断,13925041516@139.com
  • 基金资助:
    国家重点研发计划(2017YFB0903604)

Active Frequency Modulation Control of Turbo-Generator Winding End Vibration Based on Temperature Field Variation

Shi LIU1,2(),Wenjun WAN1,2,Qingshui GAO1,2,Yi YANG1,2,Zhengping ZHANG1,2,Xianliang XIA3,Chaoqi GAN4,Qunfa YANG5,Chu ZHANG1,2,Zheng HUANG1   

  1. 1 Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, Guangdong Province, China
    2 Guangdong Diankeyuan Energy Technology Co., Ltd., Guangzhou 510080, Guangdong Province, China
    3 Shanghai Electric Power Station Equipment Co., Ltd., Generator Factory, Minhang District, Shanghai 201100, China
    4 Guangdong Guohua Yuedian Taishan Power Generation Co., Ltd., Taishan 529200, Guangdong Province, China
    5 Guangdong Zhuhai Jinwan Power Generation Co., Ltd., Zhuhai 519000, Guangdong Province, China
  • Received:2017-12-01 Published:2018-02-28 Online:2018-03-27
  • Supported by:
    National Key Research and Development Program of China(2017YFB0903604)

摘要:

针对引进型大型发电机定子绕组端部振动超标问题,提出一种基于温度场变化的定子绕组端部振动主动调频控制方法。采用两端固定-铰支直梁,研究温度场变化对结构固有频率的影响机制。据此设计试验方案,结果表明,通过调整定子冷却水、冷氢温度,达到定子绕组端部固有频率远离电磁激振频率的目的,避开了共振区,从而有效地降低了定子绕组端部的振动。最后,开发了基于温度场热应力主动调频控制逻辑模块,为控制汽轮发电机定子绕组端部的振动提供一种新方法。

关键词: 汽轮发电机, 定子绕组端部, 温度场, 振动控制, 主动调频, 自适应控制

Abstract:

Aiming at the problem of excessive vibration of the stator end winding of the imported large turbo-generators, an active frequency modulation control method of the stator end winding vibration based on the change of temperature field was proposed. Taking the fixed-hinged straight beam as an example, the influence mechanism of temperature field on natural frequency of structure was studied, and a test plan was designed. The results show that by adjusting the temperature of the stator cooling water and cold hydrogen, the natural frequency of the stator end winding is far away from the electromagnetic excitation frequency and the resonance region is avoided, thereby effectively reducing the vibration of the stator end winding. Finally, the active frequency modulation control logic module based on temperature field thermal stress was developed, which provides a new method for controlling the vibration of the stator end winding of turbo-generator.

Key words: turbo-generators, stator end winding, temperature field, vibration control, active frequency modulation, adaptive control