Full-bandwidth electric drive system operating condition simulation system and method based on voltage signal transmission

Abstract

The invention provides a full-bandwidth electric drive system working condition simulation system and system based on voltage signal transmission, adopts the three-phase DC / AC converter on the drive side, and simulates the port voltage of the motor drive at the circuit level; The AC converter simulates the current response of the motor at the circuit level; the electric drive speed controller is used to describe the electrical behavior characteristics of the drive side; through the voltage signal transmission module and the ripple suppression passive impedance network module, the drive side converter is transmitted The voltage modulation signal of the controller is sent to the electric drive working condition simulation mathematical model module to describe the electrical and mechanical behavior characteristics of the target motor; the current full bandwidth control module is used to control the current response of the target motor in the full frequency band. The invention realizes the full bandwidth simulation of the target electric drive system, completely restores the electrical and control behavior of the target electric drive system, and improves the accuracy of the simulation of the working conditions of the target electric drive system under high rotational speed.

Description

technical field [0001] The invention relates to the technical field of power electronics, and in particular, to a full-bandwidth electric drive system operating condition simulation system and method based on voltage signal transmission. Background technique [0002] With the introduction of concepts such as power interconnection and interconnection of all things, the status of electric energy conversion and its application has become particularly important. Since the birth of thyristor technology, the power electronics technology it spawned has penetrated into every corner of the history of electric power development. In the fields of wind power generation, electric traction, electric vehicles and other fields that combine power electronic technology with motor control, the reliability of power electronic devices is directly related to the stable operation of the entire system. Therefore, in the design and factory commissioning stage of the electric drive system, the syste...

AI Technical Summary

Problems solved by technology

[0004] 1) The electrical quantity passing through the mathematical model of the electric drive system is usually a pulse voltage after hardware low-pass sampling, which has a shielding effect on the high-frequency component of the voltage fundamental wave, which leads to a decrease in the bandwidth of the electric drive system working condition simulation, resulting in system The dynamic response at medium and high frequencies is slower than the actual system

[0005] 2) The traditional electric drive system working condition simulation method additionally introduces a closed-loop control for the response physical quantity of the electric drive system, which is similar to the effect of hardware low-pass sampling. The control produces disturbances, which also lead to a decrease in the bandwidth of the electric drive system simulation, resulting in a slower dynamic response of the system at medium and high frequencies than the actual system

[0006] 3) When the motor is running under high-speed motor conditions, the hardware low-pass sampling and closed-loop control links mentioned above jointly limit the maximum electrical frequency of the electric drive system working condition simulation, which may cause the electric drive system to fail under high-speed motor conditions. system instability

[0007] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

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