1. The dynamic mathematical model of vector-controlled asynchronous motor is a high-order, nonlinear and strongly coupled multivariable system. It was put forward by K Hasse of darmstadt in the late 1960s. In the early 1970s, the doctoral thesis published by Siemens engineer F. blaschke in TUBraunschweig proposed a three-phase motor field-oriented control method, which solved the torque control problem of AC motor through the vector control theory of asynchronous motor. The basic principle of vector control is to measure and control the stator current vector of asynchronous motor, and control the excitation current and torque current of asynchronous motor according to the principle of magnetic field orientation, so as to control the torque of asynchronous motor.
2.pq controls power generation, heating and other service functions, which can improve the reliability and safety of power supply. DG model based on PQ control mainly includes rectifier system, rectifier controller, booster system, inverter module, PQ controller and LC filter.