论文部分内容阅读
(一)由水轮机调速系统稳定性和调节品质的要求通常要求水轮发电机组惯性时间常数是该电站水流时间常数值的二倍以上,即T_a/T_w>2.0.当T_a/T_w较小时往往要求较高的缓冲强度b_t值.当T_a/T_w≤1.0时由于b_t值过大极易引起调速器自身的不稳定现象.为消除调速器自振现象最有效的措施是较大范围地增大接力器时间常数,这就使调速器死区也增大.在此条件下原文在研究第二和第三号水电站时所采用的理想调速器的假设已不适用. (二)转浆式水轮机具有二个调节机构,以使低水头机组具有较高的水力效率.这两个机构分别
(1) The requirements of turbine speed regulation system stability and adjustment quality usually require that the hydro-generator set’s inertia time constant is more than twice the value of the station time constant, that is, T_a / T_w> 2.0. When T_a / T_w is small Require a higher buffer strength b_t value when T_a / T_w ≤ 1.0 when the b_t value is too large can easily cause instability of the governor itself to eliminate the phenomenon of governor self-vibration phenomenon is the most effective measure of a wide range of Increasing the time constant of the relay increases the dead zone of the governor, and the assumptions of the ideal governor used in the study of the second and the third hydropower stations are no longer applicable under these conditions. Turbine turbines have two adjustment mechanisms to allow for low hydraulic head units with high hydraulic efficiency.