Turbine Governor
水轮机调速器
简介水轮机调速器的：
水轮机调速器是在水轮发电机组的重要辅助设备，通用术语，描述了一个或多个设备包括实现自适应的水涡轮机和响应控制机制和指标。 盘带的水轮发电机组速度偏差的检测开关控制进入汽轮机通流，水水轮机导机构调整转速和输出。 水轮机调速系统是一个闭环系统，由控制器，液压伺服系统和调节对象，通常是控制器和液压伺服系统被统称为涡轮调速的。水轮机调速器的功能：
*它可以自动调整的水轮发电机的旋转速度，使它们保持在允许偏差额定速度内运行，以满足电网频率质量的要求。*它迅速自动或手动使得水轮发电机组出发，适应电网负荷的增加和减少，与正常停机或紧急停车的需求。
*当它运行与水轮发电机在电力系统中设置为平行，省长可以自动安排在负荷分配，使每个单元，实现经济运行。
*它可以同时满足桨和冲动水涡轮机的组合的需求。
工作水轮机调速器的原理：
由转速信号（频率单元）进行比较来对电网频率（对于给定频率），是根据其差，调速给出了电动液压转换器的操作信号中继装置开或关（命令）来控制所述涡轮机 水流量，并以这种方式实现了涡轮机速度的调节。水轮机调速器的分类：
根据速度的应用单位，省长分为：影响省长，单调，双向调节。 冲击州长适用于冲击式水轮机机组; 单调的适用于混合式水轮机或轴流涡轮发电机组; 双省长适用于移动式水轮机和灯泡贯流式水轮机的叶片轮的调整。它也可以根据自己的执政成分可分为机械调速器（即ST和T），电动调速器（DST和DT），微机调速器（WST和WT）等。
Introduction of Hydro Turbine Governor:
Hydro turbine governor is one of the important auxiliary equipments in a hydroelectric generating set, a general term that describes one or more devices consist of realizing adaptive water-turbine and responsive control mechanism and indicators. Cording to the detection of hydroelectric generating set speed deviation to switch control into the turbine flow, water-turbine guide institutions adjust the rotate speed and output. Hydro-turbine governing system is a close loop system that consists of controller, hydraulic servo system and regulating object, usually controller and hydraulic servo system are collectively referred to as the turbine speed governors.Functions of Hydro Turbine Governor:
* It can automatically adjust the rotating speed of hydroelectric generating, keeping them running within the allowable deviation rated speed, so as to meet the requirements of power grid frequency quality.* It quickly makes hydroelectric generating set automatically or manually starting to adapt to the power grid load's increase and decrease, and the needs of the normal downtime or emergency stop.
* When it runs in parallel with hydroelectric generating set in the power system, the governor can be automatically scheduled for the load distribution, and make each unit to achieve economic operation.
* It can meet the combination needs of both the paddle and impulse water turbine.
Working principle of Hydro Turbine Governor:
By comparing the rotational speed signal (frequency unit) to the power grid frequency (for a given frequency) , based on its difference, the governor gives the electro-hydraulic converter an operating signal relay device on or off (command) to control the turbine water flow, and in this way achieves the regulation of turbine speed.Classification of Hydro Turbine Governor:
According to the applicable unit of speed, governors are classified into: impact governor, monotone, dual regulating. The impact governor applies to the impulse turbine unit; the drab applies to the mixed-flow turbines or axial flow turbine generator set; the dual governor applies to the movable propeller turbine and bulb tubular turbine with the adjustment of wheel blade.It also can be divided into the mechanical governor (i.e., ST and T) , electric speed governor (DST and DT) , microcomputer governor (WST and WT) , etc according to their governing components.
