Electrical and Mechanical Power
Why in dynamic analysis of machine when plotting, electrical power response is greater than the mechanical power?
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The dynamic process is caused by the difference between electrical power and mechanical power. If the electrical power and mechanical power are equal, there will no dynamic process.
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The difference is due to the convention used in dynamics simulation output (see list of output signals in Table 14-2 in PSS/E V32 Operation Manual). Mechanical power is given in pu on machine MVA base (MBASE) while electrical power is expressed on system MVA base (SYSMVA=100 MVA by default). For example, a 500 MVA machine with 0.8 pu mechanical power (i.e. 0.8x500=400 MW) will have electrical power equal to 4 pu (on 100 MVA basis), if losses are neglected.
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