Gas Turbine Performance Analyze System, Linux Version

GER3620K Inspection Cycle Check--Combustion Inspection

  The red lines are GE recommended inspection limits, the green curves are the accumulated calculation results, based on the factored starts and fired hours of the turbine units. Comply with the algorithm described in the GER3620K document ("Heavy-Duty Gas Turbine Operating and Maintenance Considerations"), this system can calculate the inspection cycles of combustor, hot gas path, rotor and major inspection. User can specify any time period, the green lines will change correspond to the running conditions, then one can decide if the unit need an inspection.(This picture came from our test PC, so the data is incomplete for every startup.)

Frequency analyze--Residual Pressure Popple

  In this picture, the top half was the time domain waves, the green curve was draw based on sampled data, the red curve was draw based on the interpolated data. The bottom half was the result of Fast Fourier Transform, it show the intensity of every harmonic. This function provided a quantification tool to determine if there was a wave motion in some signal, like compressor discharge pressure (CPD), residual pressure, inlet guided vane position, etc.

Exhaust temperature spread

 This function show the asymmetric spread of the exhaust temperatures among those thermal couples. It can show them animatedly by clicking the "Auto Refresh" menu item.

Efficiency Calculation

  This function employed an algorithm based on "specific power", which calculates the pure output power when 1 Kg air flow through the unit firstly. It also take account of the air flow loss caused by air bleed.

The Efficiency Curves During A Startup/Shutdown Cycle

  After the the unit is online to the power grid, a service module will calculate the efficiency every 5 seconds. In this picture one can see that the higher the load, the higher the efficiency.

Use Efficiency Calculation Results To Determine If A Water Wash is Need.

  Based on the efficiency and heat rate under BASELOAD condition, user can determine if a water wash is needed. In this picture user can see the changes before and after a water wash.

  To get this picture, a service calculated efficiency one time every 15 minutes after the unit had entered BASELOAD condition. Then it took the average value every day, and draw the curves.

Economically Load Dispatch

  This algorithm was based on the recent load/fuel characteristics of the units, and took account of the maximal/minimal power limits.

The Foundation of Economically Load Dispatch -- Load/Fuel Characteristic Curve

 A service will automatically calculate the coefficients of the load/fuel quadric curve when the turbine unit entered shutdown process.

 This Function Makes Statistics  Of The Load Change Rate During A Startup/Shutdown Cycle.

Thermal Cycle Status

  Every trapezium represented the thermal cycle status on the correspond time, it was a Pressure/Volume diagram. All of the trapeziums can be draw animatedly by clicking the "Animation" menu item.

The Startup Process Curves

  At the bottom of the top curve, it shows the first and second order speed, time, maximal vibration and its position. The bottom curve is the relationship between vibration and speed.

The Shutdown Process Curves

This picture shows the pop up menu of the right sidebar.

The Load/Exhaust Temperature Curve During A Startup/Shutdown Cycle.

The Turbine Inlet/Outlet temperature Curve During A Startup/Shutdown Cycle

The Turning Gear Speed/Exhaust Temperature Curve After A Shutdown

The Report Of Startup/Shutdown Cycles During A Specified Time Period.

 Data can be sorted by clicking the field header.

Another Way To Show Units Startup/Shutdown Status.

The dialog box shows the startup/shutdown status of every turbine during a specified month. If there are starts more than once on some day, it will be shown as "+++", click on it and a list box will show the details.

Query Function List Based On Startup/Shutdown Cycle

When user choose a startup/shutdown cycle in the last picture, this function list dialog box will pop up.

The Report Of Compressor Bleed Valve Action Speed During A Time Period.

(This picture came from our test PC, so the data is incomplete for every startup.)

The Automatic Device Monitor Check Items.

At this moment there are 12 automatic monitor tasks and 8 recording tasks in this system . They will be schedule to run or stop by a service module according to the turbine's status. The tasks can be added based on user requirements.

The Report Of Device Monitor Warnings During A startup/Shutdown Cycle

(In this picture data came from one our customer's DB so the text is in Chinese, but in fact it depends on the customer's locale)

All Of The Mark V/Mark VI Signals Used By This System

If an automatic task needed some signal which was not collected by the historian, this task will not be scheduled to run by the back service.( Data in this picture came from the test machine)

The List Of Const Parameters That Can Be Adjusted By Administrators

Once the modification was applied, it will effect immediately, there is no need to restart system.

The Routine Data Record Report

It can replace the human manually record works completely.

The  Brief Report Of A Startup/Shutdown Cycle

It included some special statistics like the vanadium inhibitor usage and power generated.

One Of The System Main Menu, It Shows All Of The Query Functions Based On A Time Period.

Another Main Menu, It Shows All Of the Query Functions Based On A Startup/Shutdown Cycle.

Another Main Menu, It Shows Some Of The System Management Functions.