Parameters of an adaptive synchronous generator model are determined by measuring parameters of its electric modes and load angle. Such model is instrumental in calculating maximum acceptable power flows and ensuring greater precision of emergency control automatics.
For mathematical modelling of operation modes of synchronous machine (SM) the mathematical models based on the Park-Gorev equations are widely used. The parameters of SM in the coordinate system "d, q ,0" rotating synchronously with the rotor are independent from rotor position angle. Parameters of the mathematical model of the SM in coordinate system "d,q,0" always are determined as a result of the design calculations of the SM and experimental tests of the SM.
The parameter values vary with the mode of operation of the machine as a consequence of variation of the magnetic state of the magnetic circuit.
Adaptive synchronous generator model
At mathematical modelling of operation modes of SM according to the task two sets of parameters can be used: parameters for the saturated state of the magnetic circuit and parameters for the unsaturated state of the magnetic circuit. The approaches to development of adaptive mathematical model of the SM has been designed by our specialists.
Instantaneous values of electrical parameters: terminal voltage (phase to phase), phase to neutral voltage and phase current phases of the stator winding, the terminal voltage and current of the field winding are measured.
Instantaneous values of mechanical parameters: rotor angular position; rotor angular velocity are measured.
To register the instantaneous values of operation mode parameters of SM the PMU has been used.
For estimation of possibility practical application of these approaches to the determination of parameters, experimental studies was performed on a physical model of non-salient pole SM.