Inverter control system and method based on ACSF-MPC and PI dual-mode switching

A control system and inverter technology, which is applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc., can solve the problems of affecting the control effect, system disturbance, system collapse, etc.

Pending Publication Date: 2020-03-27
NORTHEASTERN UNIV
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  • Application Information

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Problems solved by technology

In the actual process, due to uncertain factors such as device technology, temperature, abnormal operating status, and faults, unknown deviations that are difficult to measure directly will be introd...

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  • Inverter control system and method based on ACSF-MPC and PI dual-mode switching
  • Inverter control system and method based on ACSF-MPC and PI dual-mode switching
  • Inverter control system and method based on ACSF-MPC and PI dual-mode switching

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Embodiment Construction

[0097] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0098] Such as figure 1 As shown, an inverter control system based on ACSF-MPC and PI dual-mode switching, including:

[0099] The data collection module is used to collect the voltage and current value of the AC side of the inverter and the voltage value of the DC side at the current moment;

[0100] The outer loop control module compares the sampled DC side voltage with a given voltage value to obtain a reference current value through the PI controller;

[0101] The mode switching module compares the reference current value with the AC side current value sampled by the grid side, so as to determine and select an appropriate control mode;

[0102] Data control module 1...

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Abstract

The invention discloses an inverter control system and method based on ACSF-MPC and PI dual-mode switching, belongs to the technical field of inverter current control, and the system control method employs dual-mode switching, can achieve the no-static-error adjustment of the system current in a steady state, and employs simple and effective dual-PI control. Meanwhile, a fixed-frequency model is adopted for prediction during dynamic adjustment, optimal switching sequence control is predicted for a grid-connected inverter, a traversal optimization mode is adopted for improvement, an ideal output voltage vector is compared with a module of the difference between center vectors of six sectors to obtain the minimum deviation, the calculation amount during traversal is reduced, and rapid response is achieved. Besides, in the control process, a virtual reference current error compensation value is obtained through improved fuzzy compensation and serves as the compensation amount of the current reference value output by the outer ring PI, and the problems of periodic disturbance and current ripples are solved.

Description

technical field [0001] The invention relates to the technical field of inverter current control, in particular to an inverter control system and method based on ACSF-MPC and PI dual-mode switching. Background technique [0002] As new energy power generation systems and flexible direct current transmission (FACTS) devices are connected to the power grid in large numbers, grid-connected inverters, as bridge devices, have gained a lot of attention in AC drive, active filter, static var compensator, and grid interconnection. Wide range of applications. The grid-connected inverter is an important medium for transmitting distributed electric energy to the grid. It realizes the function of converting direct current to alternating current and is the basis for realizing the effective utilization of renewable energy. Its performance directly affects the reliability and stability of the distributed power generation system. [0003] Commonly used control methods for inverters include ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02M7/5387H02M1/14
CPCH02J3/38H02M7/53871H02M1/14H02M1/0025
Inventor 王安娜张佳豪林森程科
Owner NORTHEASTERN UNIV
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