Suppression system and method based on model inverse structure and multi-loop frequency division disturbance observer

A disturbance observer and disturbance suppression technology, applied in the direction of converting irreversible DC power input into AC power output, AC network voltage adjustment, reducing/preventing power oscillation, etc. performance, improve stability, and improve anti-disturbance performance

Active Publication Date: 2022-06-07
HUBEI UNIV OF TECH
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Problems solved by technology

However, its disturbance is still suppressed by feedback, and a larger feedback coefficient is likely to affect the stability of the system

Method used

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  • Suppression system and method based on model inverse structure and multi-loop frequency division disturbance observer
  • Suppression system and method based on model inverse structure and multi-loop frequency division disturbance observer

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Embodiment Construction

[0029] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030]The specific scheme of the present invention to solve the technical problem is as follows: adopting the method of combining model inverse and disturbance observer, enhancing the tracking performance of the control system through the model inverse structure based on internal model control, and simultaneously using multi-loop frequency division disturbance observers respectively at intermediate frequency and The low frequency is divided into frequency disturbance compensation.

[0031] like figure 1 Shown is the control strategy block diagram of the main inverter. The distributed power source is connected to the main grid through the voltage inverter, and the virtual synchronous motor control strategy is selected, so that the distributed power source can actively participate in the active power frequency regulation and reactive power reg...

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Abstract

The invention relates to a disturbance suppression system and method based on the combination of a model inverse structure and a multi-ring frequency division disturbance observer. The control system based on model inversion and disturbance observer enables the distributed power generation to actively participate in the active power frequency modulation and reactive power voltage regulation process of the power system, and at the same time obtain the reference value of voltage and current; the voltage and current controller finely adjusts the injected voltage and current. The invention can effectively enhance the reliability of the inverter control system, improve the stability, and enable the microgrid to avoid current changes and load power fluctuations caused by loop switching when the microgrid switches the operating mode through the static switch, and realizes the smooth operation mode of the microgrid switch.

Description

technical field [0001] The invention relates to the field of microgrid inverter control, in particular, the combination of a model inverse structure and a disturbance observer enables the system to have both tracking and anti-disturbance performance, thereby improving the anti-disturbance ability of each frequency band of the system. Background technique [0002] With the continuous improvement of the penetration of microgrids, whether distributed power sources can be stably integrated into the power grid has become an important aspect of current research in the field of microgrids. Whether it is the internal disturbance caused by the switching of the control loop, or the external disturbance caused by the imbalance of supply and demand, the stability of the system will be affected. Even in the process of mode switching, the superimposed disturbance impact of the two is greater. Therefore, it is very necessary to improve the anti-disturbance capability of the system. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/24H02J3/16H02J3/18H02J3/40H02M7/48
CPCH02J3/381H02J3/388H02J3/241H02J3/16H02J3/18H02J3/40H02M7/48H02J2203/20Y02E40/30
Inventor 常雨芳张惠雯朱禛浩胡宇博杨子潇朱自铭张凤顺王浩源潘风黄文聪
Owner HUBEI UNIV OF TECH
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