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一、概述水轮发电机组向电网送电时,机组转速应保持稳定,传统的调节方式是藉助调速器。孤立运行的微型机组如配正规的调速器,成本高,运行维护也复杂。以往多配简易装置,如靠电动机带动导水机械动作;也有在发电机输出端直接并联数路电阻器,这种靠人手点动开关的装置既劳累,精度也低。针对某些水机采用的能耗调速方案,水机处于空流量下运行,水阻器接发电机输出端,如图1所示,当线路有多余电能时,发电机及飞摆转速升高,水平杠杆反时针移动,水阻器插入水中更深,阻抗增加,消耗电能增加,使机组转速趋于正常。通过机械
First, an overview Hydrogenerator unit to the power grid, the unit speed should be stable, the traditional way of regulation is by governor. Miniature units that operate in isolation, such as regular governors, have high costs and are complicated to operate and maintain. In the past with more simple devices, such as the motor driven water guide mechanical action; There are also directly connected in parallel with the output of the generator resistor, which rely on manual switch device is not only tired, the accuracy is low. In view of the energy-saving speed regulation scheme adopted by some water machines, the water machine runs at an empty flow rate, and the water resistor is connected to the output end of the generator. As shown in FIG. 1, when the line has excess power, High, horizontal lever anti-clockwise movement, water resistance inserted deeper into the water, the impedance increases, power consumption increases, the unit speed tends to normal. Through the machinery