摘要
为了更好的的分析各种控制系统的性能和评价不同控制算法的效果,文中介绍了一种通用的锅炉非线性动态模型。通过对500 MW汽轮发电机组上的两个扰动实验的讨论分析,解决了实际锅炉蓄热系数、磨煤机动态和水冷壁动态的求取问题。该文根据燃料量扰动试验中的主蒸汽流量Dt和锅炉的蓄热系数bC~与汽包压力Pd的微分的乘积构造出热量信号Dq,替代锅炉总有效吸热量,以求取磨煤机动态和水冷壁动态模型的传递函数,有效地解决了很难通过传感器准确测量的锅炉总有效吸热量问题。将500 MW汽轮发电机组的实际参数和实验计算结果代入模型中,建立起实际500 MW汽轮发电机组的仿真模型。与实际机组的扰动试验数据进行仿真对比,所构造的锅炉模型与实际的压力输出吻合得很好,验证了模型的有效性和正确性。
In order to analyze performance of different kinds of control systems and evaluate different control algorithms, an universal boiler dynamic model is introduced. Two disturbance experiments are then made to obtain the boiler lumped storage coefficients, dynamics of mill and furnace combustion. In order to simulate the heat release from boiler combustion, a replaced variable named heat signal Dq, is constructed which is composed of steam flow Dt, the multiple of boiler lumped storage coefficient bC^and the derivative of drum pressure Pd. Trough the heat signal, the transfer functions of mill dynamics and water wall dynamics are derived, which are difficult to be inspected by sensors. The simulation model of 500 MW unit is built up by practical rated unit parameters and the calculated value of experiments. Comparing with the practical disturbance data, the output of the constructed boiler model is guite identical with the practical pressure output. The validity of the model is proved by the simulation.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2003年第5期149-152,共4页
Proceedings of the CSEE
基金
国家电力公司重大科技项目(STKJ002-16)
