Cogeneration Plant Web Data Interface

We are very interested in your comments and suggestions. Questions or comments about this page or about the plant should be sent to crusso@alum.mit.edu.

Note: To see the most current values from a database query, you may need to hit "reload" on your browser.

Publications

Using Real-Time and Historical Data over the Internet at MIT - Christopher Russo - IDEA Conference, 2000
Operation Experience with Alstom Power's GT10 Gas Turbine and Ultra-Low NOx Combustion Control - Christian Steinbach et al., Powergen 2000
Taking Advantage of Real-Time Pricing to Optimize Plant Operations - Christopher Russo & Richard Tabors - IDEA Conference, 2001. The PowerPoint slides that go along with it.

The database server that you will connect to in order to retrieve data collects data from the systems that control and monitor the performance of the powerplant. The control system needs to measure over 6,000 values simultaneously to do this, and every value that it measures is identified by a unique "tag." This tag is a short alphanumeric code that identifies the value being measured - think of it as the "primary key" for a giant database. While retrieving data from the page below, you will see a column with the tagname for each value. To retrieve the value, description, units, etc., for this measurement, you should use its tagname. (Tagnames are case-insensitive.) It's actually a pretty simple system once you use it a bit.

What do the different color lines mean?

The lines on the flow diagram are a simplified subset of the standard color conventions for process plants. Orange lines generally signify fuel lines, blue lines signify cold water (although the temperature of the water doesn't matter in this application), and the black lines signify airflow. Also, flows are always indicated by lines with arrows. (i.e. the indication for the stagnation pressure and temperature at the compressor discharge is not a flow, but just a "pointer.")

Some useful links

Graphical Index for Live Gas Turbine Values

tag	description	value	units
gt1ji370	Active Power Output	15.7	MW
gt1fi389	Water Injection	0.44	klb/sec
gt1fi356	Primary Gas Fuel Flow	9.4000006	kbtu/sec
gt1fi357	Main Gas Fuel Flow	42.799999	kbtu/sec
gt1fi359	Main Oil Fuel Flow	0	kbtu/sec
gt1ti324	Compressor Discharge Temp	700	F
gt1pi327	Compressor Discharge Pressure	175	psi
gt1ti330	Compressor Speed	9455	RPM
gt1ti304	Exhaust Temp Average	974	F
gt1qi380	Reactive Power Output	3.2	MVAR
gt1ti329	Power Turbine Speed	7712	RPM
WS:OutsideTemp	Ambient Temp	66.700005	F
WS:OutsideHumidity	Ambient Humidity	80	PCT
GT1EXFLO.C	Estimated Exhaust Flow	567.80597	KLB/HR

Use this link for all CURRENT gas turbine data

All Gas Turbine points

Use this form to go back in time to get all gas turbine values at a specified period in time. This form will give you the same data as the link above, but for a different moment in time. The database only goes back to July of 1997, and be aware that if you are requesting very old data, performance might be a little bit slower because of the way our database caches recent data. If you see a "-248" for the return status code and numbers that look wrong, you have requested a date too far in the past, or data from the future. Hey, even our control system can't do that...

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Last modified on by crusso@alum.mit.edu