1000MW机组一次调频性能优化  

Performance optimization study on primary frequency regulation of 1000 MW units

作　　者：陈小强[1] 项谨[1] 魏路平[2] 傅望安 

机构地区：[1]浙江省电力试验研究院,浙江杭州310014 [2]浙江省电力调度通信中心,浙江杭州310007 [3]华能玉环电厂,浙江玉环317604

出　　处：《中国电力》2010年第4期63-66,共4页Electric Power

摘　　要：针对超超临界直流百万机组在一次调频时响应滞后、积分电量少的问题,提出了对数字电液调节系统(DEH)、协调控制系统(CCS)中与一次调频相关的控制策略进行优化的改进方案。在现场试验中,解决了一次调频动作时百万机组功率响应滞后、实际积分电量少的问题。首次在西门子补汽阀控制技术下的超超临界直流百万机组上成功地进行了一次调频优化试验,对汽机主控指令中压力修正环节采用动态分离,确保一次调频动作时,汽机调门不会出现逆向调节。在国内超超临界直流百万机组实际运行中,采用减少低压抽汽来弥补极端工况下机组一次调频能力的不足。研究成果有效提高了百万机组的一次调频能力,有利于提高电网频率质量和安全稳定运行水平。To deal with lagging response, lower integral power in primary frequency regulation of ultra-supereritical 1000 MW unit, the optimization scheme for control strategy related with primary frequency regulation in digital electro-hydraulic control system （DEH） and coordinated control system （CCS） was proposed. The problems such as lagging response, lower integral power were solved in field experiment. For the first time, the optimization experiment was accomplished successfully in ultra-supercritical 1 000 MW unit, in which Siemens overload valve control technology was adopted. The dynamic separation was made in pressure compensation loop of turbine master control instruction to prevent backward regulation of turbine control valve. Condensate throttling was used to make up for inadequate primary frequency regulation capability while grid frequency was in extreme work condition. The study results improve the primary frequency regulation ability of 1000 MW uhra-supercritical units, and are helpful to improve the frequency quality and safety operation level of electricity grid.

关 键 词：一次调频 超超临界 直流机组 逆向调节 低压抽汽 

分 类 号：TM621.3[电气工程—电力系统及自动化]