Motor load transient process calculation method suitable for electromagnetic transient simulation
An electromagnetic transient simulation and calculation method technology, which is applied in the direction of calculation, measurement of electricity, and measurement of electrical variables, etc., can solve the problems of inability to accurately obtain all motor operation and state variables, great difficulty, and pessimistic results of voltage stability analysis
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[0081] Such as Figure 1 to Figure 3 Shown is the embodiment of the motor load transient process calculation method suitable for electromagnetic transient simulation of the present invention, the motor is an induction motor and is located in the power supply system; the calculation method includes the following steps:
[0082] S10. Establish the first-order mechanical transient model of the induction motor rotor and solve it to obtain the speed ω of the induction motor when the power supply has a symmetrical or asymmetrical fault voltage drop m and slip s changes; the first-order mechanical transient model of the induction motor rotor is expressed as the following formula:
[0083]
[0084] In formula (1), ω m is the speed of the induction motor, T e and T m are the electromagnetic torque and mechanical load torque of the induction motor, respectively, T j is the motor inertia time constant;
[0085]
[0086] In formula (2), ω s is the synchronous speed of the indu...
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