It is always quite difficult to accurately measure boiler drum water level in power plant. Though the effect of false measurement of water level can be reduced with some devices, the effect of deviation of boiler drum...It is always quite difficult to accurately measure boiler drum water level in power plant. Though the effect of false measurement of water level can be reduced with some devices, the effect of deviation of boiler drum water level to the monitoring and alarm system, even to the control of drum water level, and so on, cannot be surmounted. Because of these reasons, the accurate water level alarm signal cannot be provided and the water level control measures cannot be applied. In order to solve this problem, a water level deviation analysis method is presented for analyzing boiler drum water level. Based on the analysis of boiler drum water level related running parameters, the relational model of water level deviation under different working conditions and its parameters is constructed. By analyzing this model, the specific impacts of the main factors can be fixed. Thus the drum water level deviation can be reduced by adjusting running parameters without changing unit load. And then the measurement of drum water level can be more accurate only if power plants have accurate measuring devices. Therefore, the boiler drum water level can be more accurately monitored and controlled. So, this innovation is important in ensuring the safe running of power plant.展开更多
详细地介绍了蒸汽负荷和给水流量的突然变化对高压汽包液位的影响,对传统的单冲量和双冲量控制在克服假液面和给水干扰方面的缺点进行了深刻的剖析,进而介绍了三冲量控制方案及其对控制性能的改进,并给出了三冲量控制系统的构成及其DCS(...详细地介绍了蒸汽负荷和给水流量的突然变化对高压汽包液位的影响,对传统的单冲量和双冲量控制在克服假液面和给水干扰方面的缺点进行了深刻的剖析,进而介绍了三冲量控制方案及其对控制性能的改进,并给出了三冲量控制系统的构成及其DCS(Distributed Control System)组态,从而较好地改善了高压汽包运行状况,实现了高压汽包安全、平稳的运行。展开更多
基金supported by the State Key Program of National Natural Science Foundation of China(No.61034004)Shanghai Science and Technology Commission Key Program(Nos.14DZ2251100,15510722100 and 15111106800)Shanghai Key Laboratory of Power Station Automation Technology(No.13DZ2273800)
文摘It is always quite difficult to accurately measure boiler drum water level in power plant. Though the effect of false measurement of water level can be reduced with some devices, the effect of deviation of boiler drum water level to the monitoring and alarm system, even to the control of drum water level, and so on, cannot be surmounted. Because of these reasons, the accurate water level alarm signal cannot be provided and the water level control measures cannot be applied. In order to solve this problem, a water level deviation analysis method is presented for analyzing boiler drum water level. Based on the analysis of boiler drum water level related running parameters, the relational model of water level deviation under different working conditions and its parameters is constructed. By analyzing this model, the specific impacts of the main factors can be fixed. Thus the drum water level deviation can be reduced by adjusting running parameters without changing unit load. And then the measurement of drum water level can be more accurate only if power plants have accurate measuring devices. Therefore, the boiler drum water level can be more accurately monitored and controlled. So, this innovation is important in ensuring the safe running of power plant.
文摘详细地介绍了蒸汽负荷和给水流量的突然变化对高压汽包液位的影响,对传统的单冲量和双冲量控制在克服假液面和给水干扰方面的缺点进行了深刻的剖析,进而介绍了三冲量控制方案及其对控制性能的改进,并给出了三冲量控制系统的构成及其DCS(Distributed Control System)组态,从而较好地改善了高压汽包运行状况,实现了高压汽包安全、平稳的运行。
