文章摘要
梅勇,张俊峰,周剑,等.“7·6”思林水电厂功率振荡事件分析及改进措施[J].电力系统自动化,2018,42(16):187-191. DOI: 10.7500/AEPS20170813002.
MEI Yong,ZHANG Junfeng,ZHOU Jian, et al.Analysis and Improvement Measures on Power Oscillations in Silin Hydropower Plant on July 6, 2017[J].Automation of Electric Power Systems,2018,42(16):187-191. DOI: 10.7500/AEPS20170813002.
“7·6”思林水电厂功率振荡事件分析及改进措施
Analysis and Improvement Measures on Power Oscillations in Silin Hydropower Plant on July 6, 2017
DOI:10.7500/AEPS20170813002
关键词: 水电厂  功率振荡  电力系统稳定器  功控制模式
KeyWords: hydropower plant  power oscillation  power system stabilizer  reactive power control mode
上网日期:2018-07-18
基金项目:
作者单位E-mail
梅勇 中国南方电网电力调度控制中心, 广东省广州市 510623 meiyong@csg.cn 
张俊峰 广东电网有限责任公司电力科学研究院, 广东省广州市 510080  
周剑 中国南方电网电力调度控制中心, 广东省广州市 510623  
李鹏 中国南方电网电力调度控制中心, 广东省广州市 510623  
摘要:
      2017年7月6日,贵州铜仁地区220 kV思林电厂在2号机组升功率期间,电压持续跌落后发生功率振荡。文中结合现场录波和BPA,RTDS仿真,详细分析了功率振荡发生原因,并对该起事件中的振荡过程进行了复现。针对事件中暴露的机组功控制模式设置不当及电力系统稳定器(PSS)装置因转速测量误差引发的低频段缺陷,提出了电厂手动定功功率模式应用原则及通过优化PSS装置斜坡函数参数提升低频段阻尼的方案。经RTDS和现场试验验证后投入运行,所提出的方案能够有效改善电厂阻尼特性;同时,结合现场试验对于PSS整定标准提出了改进建议。
Abstract:
      On July 6, 2017, a power oscillation occurred in Silin Hydropower Plant during the period of No. 2 generator increasing its output power and the plant voltage dropped continuously. Based on the on-site record curve and simulation by BPA software and RTDS, the causes of power oscillation are analyzed in detail, and the scene of the power oscillation is reproduced. In response to the problems including that the generator's reactive power mode is set incorrectly and the power system stabilizer(PSS)has some defect in low frequency band because of measurement errors in rotator speed, the application principle of the plant reactive power control mode is proposed and the damping character is promoted by optimizing PSS's ramp function setting. The scheme has been put into operation in Silin Hydropower Plant after RTDS and on-site test, and it shows that the damping characteristic of the plant is improved effectively. The suggestions for improvement of PSS's setting criterion are proposed combined with the on-site test.
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