300MW机组风机变频控制系统研究与改进  

Research and improvement of variable frequency control system for draught fans of 300 MW unit

作　　者：郑伟[1] 

机构地区：[1]天津华能杨柳青热电有限责任公司,天津300380

出　　处：《华电技术》2012年第8期54-56,59,共4页HUADIAN TECHNOLOGY

摘　　要：以天津华能杨柳青热电有限责任公司300 MW机组引风机为例,介绍了引风机变频控制系统改造后自动控制系统的相关逻辑和功能,针对变频器调节速度快、2台引风机1台工频运行1台变频运行时自动平衡及纠偏等问题,采取了更换入口挡板调节电动执行机构、调整PID调节器参数、增加2台引风机自动平衡及纠偏逻辑等措施。静、动态试验和实际运行证明,对引风机变频控制系统的优化改进达到了预期目标,机组引风机的运行更加经济、可靠。Taking the induced draught fans of the 300 MW unit in Tianjin Huaneng Yangliuqing Thermal Power Company Limited as example,the relative logic and functions of the automatic control system after reformation of variable frequency control system for the induced draught fans were introduced.Some problems were existed in the variable frequency control system,which including that the adjustment speed of the frequency converter is faster than electric actuator of the fan inlet damper adjustor,and when one of the two fans is driven by frequency converter and the other is driven by 50 Hz power source,there are not automatic balancing and deviation rectification functions in the original control system.In order to solve above problems,the electric actuator of the fan inlet damper adjustor was replaced,the parameters of the PID adjustor were adjusted,and the two fans automatic balancing function and deviation rectification logic were added into the system.The static and dynamic tests and practical operation show that the improvement of the variable frequency control system achieves expect goal,the induced draught fans operate more economically and reliably.

关 键 词：发电厂 风机变频 自动平衡 纠偏 控制系统 节能减排 

分 类 号：TM611[电气工程—电力系统及自动化]