A rectifier control device for bidirectional flow of voltage-oriented energy

Abstract

The invention discloses a rectification control device for bidirectional flow of voltage-oriented energy, which is characterized in that it comprises: a phase detection module, a voltage detection module, a current detection module, a current coordinate transformation module, a voltage loop digital PI regulator, a current loop comparator, Voltage loop comparator, current loop digital PI regulator, calculation and adjustment module, voltage coordinate transformation module and SVPWM module; through the voltage vector orientation method, the control of the grid-side current is transformed into the control of the current vector on the d-axis and q-axis The control of the DC component makes the input current waveform sinusoidal, the phase of the input current and the phase of the voltage are in phase or reverse, and the unit power factor realizes the bidirectional flow of energy. This rectifier replaces the uncontrollable rectification part of the traditional AC-DC-AC inverter, which not only overcomes the shortcomings of the traditional power supply, but also has the advantages of sinusoidal current on the grid side, approximately 1 power factor on the grid side, fast dynamic response, and easy operation. Modularization, two-way transmission of electric energy and many other advantages.

Description

technical field [0001] The invention relates to a rectification control device, in particular to a rectification control device with bidirectional flow of voltage-oriented energy. Background technique [0002] With the development of power electronics technology, the performance of power semiconductor switching devices has been continuously improved, which has promoted the rapid development of power electronic converter technology, and various converter devices based on pulse width modulation (PWM) control have appeared, such as inverters. , inverter power supply, high-frequency switching power supply and various special converters, etc. These converter devices are widely used in various fields of the national economy. At present, a large part of these converters need a rectification link to obtain DC voltage. Since the conventional rectification link widely uses diode uncontrolled rectification circuits or thyristor phase-controlled rectification circuits, a large number of...

AI Technical Summary

Problems solved by technology

Every time the motor brakes, the motor is actually working in the state of power generation, which causes the DC voltage of the bus to rise. The usual practice is to connect a release resistor across the DC bus to release the excess energy through heat, which will inevitably cause energy loss. waste

[0003] At present, the mainstream way to control the rectifier is to use DSP and MCU technology plus software. The advantage of this method is that it is more flexible and can realize complex algorithms. The more resources occupied by the CPU, the more CPU resources are occupied, which reduces the overall performance of the system; in addition, there are also problems with the versatility of the software method, because the instruction systems of products of different manufacturers are also different, which makes the software codes developed by users generally unable to be reused.

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