A Coordinated Control Method for Automatic Start Stop Closed Loop of Supercritical Units Under Wide Load Condition Transfer Gain
The automatic start stop situation of a wide load supercritical unit directly affects the overall econ-omy and schedulability of the unit.Therefore,a closed-loop coordinated control method for automatic start stop of supercritical units under the transmission gain of wide load conditions was studied.This method ana-lyzed the operating characteristics of the unit based on the operating model of a wide load supercritical unit;Based on the analysis results,on the basis of the automatic start stop control system(APS)of the unit,the allocation and weighting of each control level of the APS were completed through weighting criteria.After ob-taining the control increment for unit start stop,a transfer function and scaling factor were designed in the fuzzy PID controller,and the control parameters were optimized to achieve closed-loop coordinated control of automatic start stop for wide load supercritical units.The test results show that this method can obtain control increments for wide load supercritical units and quickly complete unit control under different disturbances;The maximum start-up and shutdown time of the unit is within 0.5 hours,which can reduce the heat consumption rate and coal consumption of the unit,with the highest values of 20.3%and 321.7 g/kW·h,respectively.
万方数据
维普
