200MW燃煤机组协调控制系统的改进和应用

The Enhancement and Application of the Coordinated Control System of 200MW Coal-Fired Unit

电网对电厂机组协调控制系统 (CCS)有更高的要求 ,提出了CCS的改进措施 :在锅炉主蒸汽压力控制回路上增加负荷指令的微分前馈信号 ;主汽压力变化较大时 ,通过改变负荷指令平衡压力等。这些措施的实施 ,改善了协调控制系统的调节品质 ,提高了系统对外界负荷适应能力 。

The power grid may have higher requirements on coordinated control system(CCS) of power unit, thus the measures of enhancement of CCS are stated. These include add load demand signal as feedforward signal to boiler main steam pressure control loop; and balance pressure through changing load demand when larger change of main steam pressure occurs. The implementation of these measures will improve the regulating quality of CCS, enhance the adaptive capability to external load change and eliminate the overshoot of main steam pressure. Prediction of Railway Passenger Traffic Volume$$$$ Luo Xiuyun Chen Shangyun Tan Yong [WT5BX](Emei Branch, Southwest Jiaotong University, Emei 614202, China)[WT5HZ]AbstractThe current situation of the railway passenger traffic (RPT) and the traffic marketing is analyzed. The grey model theory is adopted to establish a prediction model for the railway passenger traffic volume (RPTV).The RPTV from 2001 to 2005 is predicted with the proposed model, and a few suggestions are put forward. [WT5HZ]Key wordsrailways, passenger traffic, tansprotation, prediction