In terms of hydraulic turbine innovations, four different types of governors have been created. These are the mechanical, mechanical-hydraulic, analog and of course, the Digital governors . Understanding the progress of governor design will open up a whole new level of understanding on how they are relevant on various industrial sectors. Let us take a look at the various applications of the different types of governors arriving at Digital governors .
Mechanical governors are ideal only for very minute applications that require little force on the actuator. The mechanical governor was designed around the 1800s where the first patent was designed on 1870 by Amos Woodward. In 1911, improvements were made on the design of the governor and a mechanical-hydraulic type was created. The addition of hydraulics allowed more amplification of power. The advantage of the second type is that it can be implemented on very large turbines using the wicket gates.
Then came the analog governor. This specific type uses the electronic PID that offers control functionality and replaces many mechanical controls of the past governor designs. The analog version was created in the 60s. During the 1980s, the Digital governors were created where the PID now is being controlled by software. The use of microprocessors has made it possible to further increase functionality, improve performance and minimize the predictive maintenance requirements for the device. AC Motor Repair is also limited since there are less moving parts concerned but it still functions incredibly well.
For most industries interested in purchasing governors, it is very important to purchase units that comply with standard regulations. Performance of the governors is analyzed in different measures. First, they are checked based at the time of commissioning, the unit can be assessed based on shop reports and tests done on field. Another performance level test us on more accurate sets of performance characteristics that are determined using field testing. Finally, the performance is also based on the design. The design information is requested from the manufacturer for assessment.
In terms of dominance, the cabinet actuators are leading types but are not manufactured anymore due to high manufacturing costs. Thus, predictive maintenance is ideal to ensure that it will remain in good shape. Analog governors are more functional compared to the mechanical types but in terms of parts, this one still uses more components compared to Digital governors . The advantage of the latter type is on its cost effectiveness since it uses fewer components yet, it is capable of providing the same or even more functionality using software innovation. Nowadays, state of the art turbine motors are implemented by software based governors to ensure top quality results.
For turbine systems with existing mechanical or analog governors, a full replacement is not practical since this would involve considerable downtime. Most implementations include the retention of components while implementing digital features. This makes it easier to manage the existing governor and adapt a more effective way of monitoring the different components. Upgrades are ideal for existing systems but new turbine implementations will benefit greatly from purely Digital governors for more cost effective solutions.