大型汽轮发电机组发生低频振荡过程分析及抑制措施

Analysis and Suppression Measures of Low-frequency Oscillation for Turbine Generator

本文以1050MW汽轮机组发生低频振荡后为例,首先从DCS历史数据和PMU数据,结合建模进行过程分析振荡发生的原因及机理,随后从汽轮发电机组角度进行优化控制逻辑、PSS管理、严格试验测试以及迅速正确操作等四个方面,给出了从发电厂侧抑制电力系统低频振荡的具体措施,最后实施基于汽轮机配汽方式、阀门流量特性、智能一次调频、变参数自适应协调控制等一系列措施最终达到预期目标。本文建议同类型机组重视网源协调工作,以提高电网安全稳定运行水平。

After the occurrence of low-frequency oscillations in the 1050MW steam turbine unit,the causes and mechanisms of the oscillation are analyzed from the DCS historical data and PMU data,combined with the modeling process.From the perspective of the turbine-generator set,optimization of control logic,PsS management,strict testing,and prompt and accurate operation are carried out.A series of measures,including adaptive coordinated control of variable parameters,are implemented to achieve the desired objectives.It is recommended that units of the same type prioritize network-source coordination to enhance the power grid's safety and stability level.