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Power plant synchronization to transmission system

Power plant synchronization to transmission system

Power plant synchronization to transmission system

(OP)
I understand that its standard to opearate a transmission system within 5% of a rated voltage.  Can power plant be synched to transmission system at any voltage within 5% of rated as well, or should it be synched at rated voltage?

RE: Power plant synchronization to transmission system

The generator voltage is adjusted to match the line voltage. A range of +/- 5% is manageable.  In most cases the generator will be operating at a slightly higher voltage than the incoming line so that it can supply reactive power to the grid.  

 

David Castor
www.cvoes.com

RE: Power plant synchronization to transmission system

in some European countries Grid Codes it is specified to synchronize to the grid at 0 MVar unless otherwise instructed
 

May you grow up to be righteous, may you grow up to be true...

RE: Power plant synchronization to transmission system

(OP)
Thanks for your swift reply, dpc.  Can you recommend a text or reference manual that speaks to this situation?   

RE: Power plant synchronization to transmission system

IEEE Standards C50.12 and C50.13 provide specifications
for the construction of cylindrical-rotor and salient-pole
synchronous generators, respectively. They specify,
"Generators shall be designed to be fit for service without
inspection or repair after synchronizing that is within the
limits listed..." [1] [2]. The limits for both types of generators
are:
• Angle ±10 degrees.
• Voltage 0 to +5 percent.
• Slip ±0.067 Hz.
IEEE Standard 67, which also discusses synchronizing
requirements, specifically says that the standard does not
apply to the prime mover [3]. The author is unaware of any
standards that apply to the design of the prime mover, so the
generator limits are typically the ones used to design a
synchronizing system. However, in practice, wider limits are
often applied because the prime mover control is not fine
enough to reliably achieve a 0.067 Hz slip.
................H

extracted from
Fundamentals and Advancements in Generator Synchronizing Systems


 

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