基于生物质气的100 kW微型燃气轮机建模与控制研究

Research on Modeling and Control of 100 kW Micro Gas Turbine Based on Biomass Gas

为了研究扰动对微型燃气轮机运行性能的影响,搭建了以生物质气为燃料的微型燃气轮机的整体动态仿真及控制模型,分析环境温度、负荷等变化对微型燃气轮机运行状况的影响及研究控制系统的动态响应。研究结果表明,环境温度由15℃阶跃升至25℃时,机组输出功率以及热效率降低,在控制系统的调节作用下,增加了燃料流量的输入,系统调整到新的稳定状态,在新稳定状态下的热效率相对降低了3.09%;负荷阶跃升20%负荷时,转速降低,机组输出功率及热效率增大,在控制系统的作用下,燃料流量增加,转速回归,系统达到新的平衡,热效率相对增加了5%;当负荷阶跃降20%负荷时,转速升高,机组输出功率与热效率会减小,在控制系统的作用下,燃料流量减小,转速回归到稳定值,系统到达新的稳定状态,热效率相对减小了8.03%。

In order to study the influence of disturbance on the operating performance of the micro gas turbine,the overall dynamic simulation and control model of the micro gas turbine fueled by biomass gas is built to analyze the influence of changes in ambient temperature and load on the operation status of the micro gas turbine,and to study the control system dynamic response.When the ambient temperature is stepped from 15℃to 25℃,the output power and thermal efficiency of the unit decrease.Under the regulation of the control system,the input of fuel flow is increased and the system is adjusted to the new stable state.Under the new stable state,the thermal efficiency is reduced by 3.09%relatively.When the load is stepped up by 20%,the speed decreases,and the output power and thermal efficiency of the unit increase.Under the action of the control system,the fuel flow increases,the speed returns,the system reaches a new balance,and the thermal efficiency relatively increases 5%.When the load is stepped down by 20%,the speed will increase,and the output power and thermal efficiency of the unit will decrease.Under the action of the control system,the fuel flow will decrease,the speed will return to a stable value,and the system will reach a new stable state.The thermal efficiency is relatively reduced by 8.03%.