While the scientific technology developing at a tremendous speed , the level of hydro - generator manufacturing is increasing . now the f - class insulation standard for generator is adopted , and cad for hydraulic design has spread , and advanced theory in hydraulic design is applied , and insulation materials are discovered , and precise processing techniques are under research . in the hydroelectric industry it ' s necessary to increase the generating units " installed capacity to take advantage of an old power plant and to raise the utilization ratio of water power energy 随着科学技术的飞速发展，水力发电机的生产制造水平日益提高， f级绝缘在电机中的运用；计算机cad辅助水力设计的推广，先进的水力设计理论的应用，新的电气绝缘材料的发现，精密的加工工艺的研究，为了提高水能利用率，使老电站焕发青春，机组增容改造已是水电事业发展中一项不容忽视的工作。
