PWM型位移传感器在水轮机控制中的应用研究

The Applied Research of PWM Displacement Sensor in Hydraulic Turbine Control

本文介绍了一种PWM(脉冲宽度调制)型数字式位移传感器的原理、实施方式及在水轮机调速上的应用。该传感器采用旋转变压器作为测量元件,不需A/D变换即可直接得到位移的数字量,测量精度高,是快速的数字随动系统,在水轮机调速系统中得到了广泛的应用。该传感器结合水轮机调速器双环控制系统,采用适应式、改进型的PID控制策略,使水轮机调速器性能指示优于国家标准及行业标准,对水轮发电机组安全运行起到了很重要的作用。

This article introduces the theory,implementation and applications in hydraulic turbine governor of PWM(pulse width modulation)digital displacement sensor.The sensor uses rotary transformer as measure components,It can directly get the displacement of the digital without A/D transformation,it is a high precision measurement and is a fast digital servo system.The displacement sensor get wild application of hydraulic turbine control system.The sensor combined double loop control system of hydraulic turbine governor,adopted adaptive and improved PID control strategy,makes the performance of hydraulic turbine governor better than national standards and industry standards,and plays an important role of the safety operation for hydraulic generator.