mushtaq [at] shreecementltd.com

Can anybody explain about the DEH system for steam turbine? What will be the selection criteria and Vendors for the same?

what is the general opinion about Chinese make DEH?

MAK

 

Digital turbine control systems, particularly those for steam turbines, require some very high-speed processing capability. That's because steam turbines can overspeed very quickly and easily. One should choose a digital steam turbine control system with the above thought in mind.

Having said that, there are any number of vendors who can provide the hardware for the control system to meet the requirements, and from many different parts of the world.

The success of any control system retrofit is <b>entirely</b> dependent on the organization you choose to implement the hardware. If you are choosing an aftermarket turbine control system, like something from, say, Woodward (just as an example), the hardware is very capable. But, it's the control system integrator (for Woodward, it's the 'Recognized Turbine Retrofitter' or distributor) that will be applying the control system to the turbine.

In other words, it's the quality of the engineering (the wiring drawings, the configuration of the wiring, the configuration of the control system for your application) and the quality of the installation and commissioning that determines the success of the retrofit/upgrade/conversion.

So, as has been said tens of times here on control.com, you can find adequate or superior hardware for just about any automation application. But, the outcome is entirely dependent on the packager and the installation/commissioning. Choose the hardware wisely, but choose the supplier/programmer/packager/installer with more thought and deliberation than given to the hardware choice.

Ask the supplier (even if it's the original equipment manufacturer) for references on the installation. Contact those references. Ask here on control.com. Ask other plants in your area about their experiences with suppliers/vendors.

It's very difficult to send an email or make a phone call to ask for feedback and information. But, how many times have you had an experience with a supplier/vendor (good as well as bad) when you wished you could tell others about, to help them when making a decision about whether or not to buy from them?

There is a lot of very good equipment out there, but if it's not configured properly, and if it's not installed properly, and if it's not commissioned properly, is just junk.

Do your homework if you're in the market for a turbine control system. And, be most interested in the ability and past installation/commissioning history of any vendor/supplier you are considering for the job of installing the turbine control system.

Good luck and let us know what you decide!