CAJ | 학술논문

通过合理简化和机制分析，建立适用于直流炉机组协调控制系统控制器设计的简化非线性数学模型。建模时考虑制粉环节、减温水环节和回热加热对过程输出的影响。该模型以燃料量指令、总给水流量、汽轮机阀门开度为输入，以汽轮机功率、主蒸汽压力和汽水分离器出口焓为输出。结合某1000Mw超超临界机组运行数据辨识得到了在50％负荷到100％负荷范围内工作的机组模型参数。对模型进行了开环阶跃扰动实验和现场运行数据对比实验。仿真结果表明，模型开环动态特性与实际机组开环特性在本质上一致，且具有一定精度，可以用来设计协调控制系统控制器。
통과합리간화화궤제분석，건립괄용우직류로궤조협조공제계통공제기설계적간화비선성수학모형。건모시고필제분배절、감온수배절화회열가열대과정수출적영향。해모형이연료량지령、총급수류량、기륜궤벌문개도위수입，이기륜궤공솔、주증기압력화기수분리기출구함위수출。결합모1000Mw초초림계궤조운행수거변식득도료재50％부하도100％부하범위내공작적궤조모형삼수。대모형진행료개배계약우동실험화현장운행수거대비실험。방진결과표명，모형개배동태특성여실제궤조개배특성재본질상일치，차구유일정정도，가이용래설계협조공제계통공제기。
A simplified nonlinear model which was suitable for the controller design for coordinated control system of a oncethrough boilerturbine unit was developed with reasonable simplification and physical analysis. The direct blowing pulverizing system, the attemperations and the regeneration were taken into account in the modeling process. In this model, fuel command, total water flow and turbine governor valve position were considered as inputs and turbine power, main steam pressure and specific enthalpy at the steam-water separator outlet were considered as outputs. Parameters of the model for load variation between 1 000 MW and 500MW were identified with operation data of a 1 000 MW ultrasupercritical unit. Step forced simulation test and comparison tests with operation data were done to test the model. Simulation results show that this model has same dynamic characteristics with the actual unit and can predict output changes with certain accuracy which means that it is fit for the controller design of coordinated control system.