Design method of phase compensation resonance controller in grid-connected inverter

A resonant controller, phase compensation technology, applied in output power conversion devices, AC power input conversion to DC power output, high-efficiency power electronic conversion, etc., can solve threats to the safe and stable operation of distributed power generation systems, grid-connected inverter In order to ensure safe and stable operation, enhance robustness, and improve phase-frequency characteristics
CN112260569AInactive Publication Date: 2021-01-22HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2021-01-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a design method of a phase compensation resonance controller in a grid-connected inverter. The method is characterized by comprising the following steps of: neglecting the action of the resonance controller and solving a proportionality coefficient of the phase compensation resonance controller; solving each harmonic coefficient of the phase compensation resonance controller according to the steady-state tracking error requirement of the fundamental wave reference current and the response speed of each resonance controller; further acquiring the maximum phase lag angleof each resonance controller; and finally, integrating the phase lag of the grid-connected inverter system and the resonance controller, and solving the leading phase angle of the phase compensation resonance controller. According to the invention, the robustness of the grid-connected inverter to the impedance change of the power grid can be enhanced, and the safe and stable operation of the grid-connected inverter is ensured.
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Description

technical field

[0001] The invention belongs to the field of inverter control, and more specifically relates to a design method for a current controller of a grid-connected inverter. Background technique

[0002] At present, the continuous development of economy and society has led to the increasing demand for energy in countries all over the world, and the situation of energy shortage and environmental pollution is becoming more and more severe. In order to deal with environmental pollution and achieve sustainable energy development, my country's distributed power generation system based on renewable energy has achieved tremendous development in recent years. As an interface device between the distributed power generation system and the grid, the grid-connected inverter Its function is to invert the direct current generated by the previous stage of renewable energy into high-quality power frequency alternating current to be sent to the grid. However, with the continuous dev...

Claims

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