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Finite control set model predictive voltage control method containing delay compensation

A voltage control method and finite set model technology, applied to load forecasting, electrical components, circuit devices, etc. in the AC network, can solve problems such as lack of delay, and achieve improved performance, good robustness and reliability, good control effect

Active Publication Date: 2017-06-30
FUZHOU UNIV
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Problems solved by technology

At present, research at home and abroad is more focused on the control of the inverter output current, while the research on the output voltage control is relatively less, and the attention to the delay problem caused by the calculation is also lacking. In the completeness of the control algorithm There is room for further improvement in terms of accuracy and

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  • Finite control set model predictive voltage control method containing delay compensation
  • Finite control set model predictive voltage control method containing delay compensation
  • Finite control set model predictive voltage control method containing delay compensation

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Embodiment Construction

[0035] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0036] The present invention provides a finite set model predictive voltage control method with delay compensation, such as figure 1 shown, including the following steps:

[0037] Step S1: Collect the current time t k Next, the voltage and current state of the system, including: the load side voltage v at the current moment l (k); load current i l (k); Inverter output current i o (k);

[0038] Step S2: before applying t k-2 The switch state at the current moment is predicted and calculated at the sampling moment;

[0039] Step S3: Calculate t k+2 The reference value of the load voltage at all times;

[0040] Further, in this embodiment, the reference voltage is a power frequency sinusoidal voltage, which can be expressed as:

[0041]

[0042] Where: V l * is the reference voltage amplitude; θ(k) is the vector angle of the re...

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Abstract

The invention relates to a finite control set model predictive voltage control method containing delay compensation. NPC inverter load side voltage is controlled through finite control set model predictive control, and delay compensation is performed on a control algorithm at a new sampling moment by directly applying the switch state predicted in advance and then predicting the new switch state so that inverter output control can be realized. The finite control set model predictive voltage control method containing delay compensation has great control effect and better robustness and reliability.

Description

technical field [0001] The invention relates to the technical field of new energy conversion, in particular to a finite set model predictive voltage control method including delay compensation. Background technique [0002] The energy problem has always been a hot issue facing the world. In recent years, renewable energy has attracted more and more attention. Various new energy sources such as wind energy, solar energy, and biomass have been widely used and promoted in power systems. The inverter part is the bridge connecting the new energy power generation system with the load and the grid, and is the core link of the system. With the development of new energy technologies, higher requirements are put forward for the quality of power output by inverters, and new challenges are also posed for the control of inverters. [0003] Traditional inverter control methods include hysteresis control, double-loop control, fuzzy control, etc. In recent years, the application of Finite ...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/003H02J3/382H02J2203/20
Inventor 金涛苏泰新刘思议宗戈
Owner FUZHOU UNIV
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