摘要
鉴于长引水系统水流惯性时间系数较大,机组减负荷时,机组输出力矩无法立即响应负荷的变化,不能很好地满足电网稳定调节需求。通过BCB软件平台对带有调压井的高水头机组复杂非线性模型的减负荷过渡过程进行仿真,提出将调压井的涌浪反馈引入至机组PID调速系统的比例环节、积分环节和微分环节,对比分析减负荷后机组出力、调压井涌浪及蜗壳水压波动情况。结果表明,引入调压井的涌浪反馈至调速系统的微分环节能够加快长引水系统机组减负荷后系统的稳定。
Due to the larger water inertia time factor of the long-distance diversion tunnel hydropower station,the output torque could not respond immediately while load shedding.Therefore,it could not meet the requirements of the grid regulator well.The simulations of complex nonlinear model of hydro turbine shedding load with surge tank were built on BCB platform.By introducing water pressure feedback of surge tank to hydraulic turbine governor＇s proportional component,integral element and differentiation element,the maximum of turbine torque,the highest surge and the most pressure in spiral case inlet were analyzed.The results show that by introducing the derivative feedback of surge tank＇s water pressure can improve power system stability effectively while load shedding.
出处
《水电能源科学》
北大核心
2016年第7期175-177,149,共4页
Water Resources and Power
关键词
调压井
涌浪反馈
长引水系统
调速系统
减负荷
surge tank
surge feedback
long-distance diversion tunnel
regulation system of hydraulic turbine
load shedding
