Passive control system and method for improved LCL type three-phase VSR based on IDA-PBC algorithm

A passive control, three-phase technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., to achieve the effect of improving stability, reducing resonance phenomenon, and design

Inactive Publication Date: 2019-04-16
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

Aiming at the existing LCL-VSR resonance problem in the prior art, an LCL-VSR control strategy based on fixed switching frequency control is proposed

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  • Passive control system and method for improved LCL type three-phase VSR based on IDA-PBC algorithm
  • Passive control system and method for improved LCL type three-phase VSR based on IDA-PBC algorithm
  • Passive control system and method for improved LCL type three-phase VSR based on IDA-PBC algorithm

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] The system block diagram of the present invention is as figure 1 As described above, the technical solution of the system in this embodiment is a passive control system and method for an improved LCL three-phase VSR based on the IDA-PBC algorithm, which is characterized in that it includes an AC power supply module, a voltage signal acquisition sensor, a phase-locked loop , current signal acquisition sensor, controller module, rectifier bridge power swi...

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Abstract

The invention relates to a passive control system and method for an improved LCL type three-phase VSR based on an IDA-PBC algorithm. According to the method of the invention, an LCL filter is used toreplace the traditional L filter, the three-phase voltage of a grid side is collected through a voltage signal acquisition sensor, the three-phase current of a rectification side is collected througha current signal acquisition sensor, and coordinate axis voltage and current are calculated according to the coordinate transformation. A dissipative Hamiltonian mathematical model with a controlled port is constructed according to the coordinate axis voltage and current, damping injection is performed, and improved parameters are added. A controller module obtains a voltage control signal throughtransformation according to a d-axis switching function and a q-axis switching function, a rectifier bridge power switching tube is controlled according to a space vector pulse width modulation algorithm, and alternating current outputted by an alternating current power module is rectified into direct current. According to the invention, the response speed of the system is quick at a low switching frequency, the harmonic content is effectively reduced, and at the same time, the stability of the system is improved.

Description

technical field [0001] The invention belongs to the field of power electronics and nonlinear control, in particular to an improved LCL type three-phase VSR passive control system and method based on IDA-PBC algorithm. Background technique [0002] The three-phase Voltage Source Rectifier (Voltage Source Rectifier, VSR) for the traditional L filter has the disadvantages of high electronic switching frequency, large inductance value, and relatively high harmonic content. Because the LCL filter has a better filtering effect on high-order harmonics, it can effectively reduce the total harmonic distortion (Total Harmonic Distortion, THD) of the network current waveform, and can also perform energy shaping, making the controller design more flexible , so the L filter in the VSR is gradually replaced by the LCL filter. [0003] Although the LCL filter can reduce the total harmonic distortion rate of the network current waveform, the introduction of the filter capacitor increases t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02M1/12
CPCH02M1/126H02M7/219
Inventor 严运兵高维士马强龚边
Owner WUHAN UNIV OF SCI & TECH
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