LCL filtering-based RBFNN segmentation online optimization passive control system and method

A passive control and controller module technology, applied in the direction of output power conversion devices, electrical components, AC power input conversion to DC power output, etc., can solve the problem of increased high-order harmonic content on the grid side, system instability, increased problems such as resonance

Active Publication Date: 2019-11-08
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

[0003] Although the LCL filter can reduce the total harmonic distortion rate of the network current waveform, the introduction of the filter capacitor increases the resonance phenomenon, resulting

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  • LCL filtering-based RBFNN segmentation online optimization passive control system and method
  • LCL filtering-based RBFNN segmentation online optimization passive control system and method
  • LCL filtering-based RBFNN segmentation online optimization passive control system and method

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[0105] 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.

[0106] 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 based on LCL filtering based on RBFNN segmented online optimization, which is characterized in that it includes an AC power supply module, an AC voltage signal acquisition sensor, a DC voltage signal acquisition sensor, Phase-locked loop, AC current signal acquisition sensor, ...

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Abstract

The invention proposes an LCL filtering-based RBFNN segmentation online optimization passive control system and method. Grid-side three-phase voltage and current signals are acquired through three-phase voltage and current signal sensors respectively, and coordinate transformation is performed; a passive control Hamiltonian model based on an IDA-PBC algorithm is built according to coordinate axisvoltage and current, and improved d,q-axis switching function is built; particles containing parameters such as an RBFNN learning rate and a momentum factor under different load resistances are subjected to offline optimization through PSO to obtain an optimal particle set; the load resistances calculated by DC-side voltage and current sensor signals are used as segmentation triggering conditions,an RBF-PID model is built through the optimal particle, and a controller model is used to realize segmentation optimization control; the RBF-PID after parameter optimization is used for optimal solution for stably-operating Im; and according to the optimized Im and in combination of the d,q-axis switching function, control is carried out, IGBT control signals are generated by SVPWM, and rectification control is realized. The control precision is higher, and the robustness is better.

Description

technical field [0001] The invention belongs to the field of power electronics and nonlinear control, and in particular relates to an RBFNN subsection online optimization passive control system and method based on LCL filtering. Background technique [0002] With the development of power control technology, the LCL-filtered Voltage Source PWM Rectifier (Voltage Source PWM Rectifier, VSR), that is, LCL-VSR, has a better filtering effect on high-order harmonics, not only the switching frequency is low, the inductance The value is small, and at the same time, it can effectively reduce the total harmonic distortion (Total Harmonic Distortion, THD) of the grid current waveform, and more and more researchers pay attention to it. [0003] Although the LCL filter can reduce the total harmonic distortion rate of the network current waveform, the introduction of the filter capacitor increases the resonance phenomenon, resulting in system instability. If the resonance phenomenon canno...

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Application Information

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IPC IPC(8): H02M7/219H02M1/12
CPCH02M1/126H02M7/219
Inventor 高维士严运兵马强瞿红玲于俊飞
Owner WUHAN UNIV OF SCI & TECH
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