摘要
Abstract
With the rapid development of ultra-high voltage power grids and the large-scale integration of renewable energy,the issue of sub-synchronous oscillation(SSO)becomes increasingly prominent,posing a serious threat to the safe and stable operation of high-capacity thermal power units.It takes the frequent SSO events occurring in the 880 MW and 1000 MW units of Suizhong Power Plant as the research subject,conducting an in-depth analysis of key triggering factors such as abnormal grid operation,changes in steam turbine valve flow characteristics,and defects in primary frequency regulation control strategies.Based on the concept of"grid-unit"collaborative optimization,it proposes a comprehensive prevention and control solution,covering operational management,parameter tuning,and control strategy optimization.Field tests and long-term operational monitoring demonstrate that this solution can signifi-cantly reduce the risk of SSO occurrence and ensure the safe and stable operation of the units.The research findings provide a theoreti-cal foundation and practical engineering reference for the analysis and mitigation of SSO issues in similar thermal power units,offering reference for enhancing the stability of power systems with high penetration of renewable energy.关键词
次同步振荡/火电机组/一次调频/流量特性优化Key words
SSO/thermal power unit/primary frequency regulation/valve flow optimization分类
信息技术与安全科学
