Recent content by Atteya

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    Island Mode Operation

    Dear CSA, Apologies for any misunderstanding. I did not mean to upset you. My original question was asking about whether adding a load to an STG in island mode will affect the speed (freq) or the voltage. This information is helpful to me to understand/troubleshoot a blackout that occurred in...
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    Excitation System: VAR vs Power Factor Control Modes

    Controls Guy25, Thanks for your response. Our steam-turbine generator is used to provide power to our chemical plant in parallel with the grid and of course, keeps the plant running in case of grid failure. In case of parallel operation, we normally put our excitation system on the PF control...
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    Island Mode Operation

    Controls Guy25, Thanks for your response. I've attached the AVR and the protection relay settings for your reference. The generator is feeding the whole plant with a lot of different loads. Actually, at the moment of the trip, we could not identify any load disturbance from major loads...
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    Island Mode Operation

    Thanks for your quick response. I really appreciate it. I added my comments in red above.
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    Island Mode Operation

    Hello, I have a question regarding our steam turbine generator operating in island mode (Grid is disconnected) and the excitation system is controlling the terminal voltage (6.6 kV). When a sudden load is added, which of the following will be affected first? The generator frequency (speed)...
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    Excitation System: VAR vs Power Factor Control Modes

    Hello, We have a steam turbine generator (6.6 kV) that is connected in parallel with the national grid. During the parallel operation, I have the option to choose between the Power Factor Control or the VAR Control. What are the pros and cons for using both control modes? Which one should I...
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