Bus voltage stabilization control method for photovoltaic power generation system
A photovoltaic power generation system, voltage stabilization control technology, applied in the direction of photovoltaic power generation, electrical components, circuit devices, etc., can solve the problem of large fluctuations in the DC bus voltage affected by disturbances, to improve transient response, transient state process, small The effect of volatility
Inactive Publication Date: 2022-01-14
STATE GRID JIANGSU ELECTRIC POWER CO LTD SUQIAN POWER SUPPLY BRANCH
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Problems solved by technology
[0003] The technical problem to be solved in the present invention is: taking the three-phase full-bridge inverter as an example, by proposing a grid voltage directional vector control method using active disturbance rejection technology, the problem of large fluctuations in the DC bus voltage affected by disturbances can be solved
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention:
[0021] The invention relates to a photovoltaic power generation system bus voltage stabilization control method, comprising the following steps:
[0022] 1) The AC voltage, AC current, DC bus voltage and phase angle are obtained according to the voltage and current sampling and phase-locked loop and sent to the DSP chip (TS28379D);
[0023] 2) Convert the AC voltage and current obtained by the sampling circuit into the corresponding amount of the d-q axis through coordinate transformation;
[0024] 3) The trigger pulse of the three-phase fully controlled bridge is obtained by the two-level space vector pulse width modulation control method; and then the energy flow from the DC bus to the power grid is realized.
[0025] The coordinate transformation is realized...
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The invention relates to a bus voltage stabilization control method for a photovoltaic power generation system. The method comprises the following steps: 1) according to voltage and current sampling and a phase-locked loop, obtaining values of AC voltage, AC current, DC bus voltage and a phase angle, and sending the values to a DSP chip (TS28379D); 2) converting the AC voltage and current obtained by a sampling circuit into quantities corresponding to a d-q axis through coordinate transformation; 3) obtaining a trigger pulse of a three-phase full-controlled bridge by a two-level space vector pulse width modulation control method, so that energy can flow from the DC bus to the power grid.
Description
technical field [0001] The invention relates to a control method for optimizing grid voltage directional vector control with active disturbance rejection technology, which is mainly used in the field of photovoltaic power generation, and can solve problems such as illumination changes, complex systems, grid voltage fluctuations, and load changes. Background technique [0002] In recent years, with the increasingly prominent problems of energy crisis and environmental pollution. Therefore, the research, development and utilization of new energy is an inevitable process to solve energy depletion and environmental pollution. Solar energy, as a kind of renewable natural energy, spreads all over the world, is environmentally friendly, reliable, and easy to use. It is currently one of the most widely used and most promising green energy sources for adjusting energy structure. However, due to the randomness of illumination and strong uncertainties such as nonlinearity and variable...
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IPC IPC(8): H02J3/38H02M7/5387H02M7/5395
CPCH02J3/381H02M7/53875H02M7/5395H02J2300/24Y02E10/56
Inventor 王秀茹韩少华代鹏邱冬刘刚许磊钱欣
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD SUQIAN POWER SUPPLY BRANCH