摘要
为了更好地实现对亚临界机组辅机故障减负荷RB控制,提出了一种630 MW亚临界机组RB控制策略逻辑优化方法。以某电厂2×630 MW机组为例,介绍了空冷燃煤机组主要辅机故障快速减负荷功能的逻辑设计,从RB触发条件、制粉系统停运数量及顺序等方面优化控制逻辑。同时,优化机组给水泵RB、送/引风机RB、一次风机RB等重要辅机RB功能的控制策略。通过RB动态试验,证明了提出的RB控制策略具有显著优化特性,该方法结合了机组改造后的运行需求与运行特点,动态测试中一次风机RB机组的机前压力最高值和最低值为16.7 MPa和12.8 MPa,满足设定要求,其他设备和参数也均在合理范围。在100次试验中,该方法仅发生2次机组未安全、平稳地降至安全负荷,因此有效降低了现场技术人员的控制作业操作强度,提升了机组运行稳定性与可靠性,保证了机组运行控制过程的自动化、智能化与主动化。
In order to better realize the Runback(RB)control for auxiliary engine failure of subcritical units,a logic optimization method of RB control strategy for 630 MW subcritical unit is presented in this paper.Taking a 2×630 MW unit of a power plant as an example,the logic design of the function of rapid load reduction of the main auxiliary engine failure of the air-cooled coal-fired unit is introduced,and the control logic is optimized from the aspects of RB trigger conditions,the number and sequence of milling system shutdowns.At the same time,the control strategy of the RB function of the unit feed pump,feed/induced draft fan RB,primary fan RB and other important auxiliary machine RB functions is optimized.The RB dynamic test proves that the proposed RB control strategy has significant optimization characteristics.This method combines the operation requirements and operating characteristics of the unit after transformation,and the maximum and lowest values of the front pressure of the primary fan RB unit in the dynamic test are 16.7 MPa and 12.8 MPa,which meet the setting requirements,and other equipment and parameters are also within a reasonable range.In 100 tests,this method only occurred that the unit was not safely and smoothly reduced to the safety load in 2 times,so it effectively reduced the control operation intensity of the field technicians,improved the stability and reliability of the unit operation,and ensured the automation,intelligence and initiative of the unit operation control process.
作者
赵磊
包立军
赵太磊
庄伟
康磊
ZHAO Lei;BAO Lijun;ZHAO Tailei;ZHUANG Wei;KANG Lei(Pithead Power Generation Branch,Inner Mongolia Baiyinhua Coal&Power Co.,Ltd.,Xilinguol League 026200,China;Shanghai Power Generation Equipment Design and Research Institute Co.,Ltd.,Shanghai 200240,China)
出处
《电工技术》
2023年第1期183-186,201,共5页
Electric Engineering
基金
国家电力投资集团有限公司统筹研发经费支持项目“火电机组智能监控系统技术研究与示范应用”(编号KYTC2020HD09)。
关键词
空冷燃煤机组
RB
逻辑优化
亚临界机组
一次风机动叶
主蒸汽压力
air-cooled coal-fired unit
RB
logic optimization
subcritical engine group
primary wind motor blade
main steam pressure
