Inverter control method based on fractional order PID discrete sliding mode variable structure

A technology of sliding mode variable structure and control method, which is applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc., to achieve the effect of improving control accuracy, strong robustness, and improving chattering problems

Active Publication Date: 2017-10-13
上海劭能新能源科技有限公司
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Problems solved by technology

At present, there is no publication on the control design method of the inverter circuit system that combines the respective advantages of fractional-order technology and discrete-time sliding mode control.

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  • Inverter control method based on fractional order PID discrete sliding mode variable structure
  • Inverter control method based on fractional order PID discrete sliding mode variable structure
  • Inverter control method based on fractional order PID discrete sliding mode variable structure

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Embodiment Construction

[0048] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0049] The purpose of the present invention is to propose a novel inverter control strategy, which combines fractional-order PID and discrete-time sliding mode variable structure control to ensure the dynamic performance and steady-state performance of the system. Taking a single-phase four-stage voltage inverter as an example, the specific steps are as follows:

[0050] 1. Establish a high-order voltage source inverter system model

[0051] Such as figure 1 As shown, it is a single-phase four-stage voltage inverter circuit, and an LC network is set at the load end. v DC is the DC bus voltage, v C2 is the output voltage.

[0052] Let the state space equation of the...

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Abstract

The invention discloses an inverter control method based on a fractional order PID discrete sliding mode variable structure, applied to a high-order voltage type inverter system for providing a novel efficient control strategy. In the high-order voltage type inverter system, a fractional order PID control and sliding mode variable structure control method is combined to improve an inherent buffeting problem of sliding mode control; meanwhile, a firefly algorithm is used for optimally setting a control parameter, so that excellent effect of the control method is ensure to a certain extent, and the system has the characteristic of intelligence. The control method provided by the invention has the advantages of being high in control accuracy, fast in tracking speed, good in robustness and insensitive to external interference, and can ensure dynamic performance and steady-state performance of the inverter system.

Description

technical field [0001] The invention relates to an inverter control method based on a fractional-order PID discrete sliding mode variable structure, which is applied to a high-order voltage type inverter system and belongs to the technical field of nonlinear control. Background technique [0002] In the new energy era, inverter technology, as the core representative of power electronics technology, has a wide range of applications in actual production and life, such as: uninterruptible power supply, AC motor drive, car adapter and so on. With the popularization of these inverter applications, people's requirements for its performance are also getting higher and higher. [0003] The traditional inverter control strategy usually uses the output for feedback, and then combined with the linear control method for control, the result is often obvious waveform distortion and poor dynamic performance. At present, the widely used inverter control strategies mainly include deadbeat c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387
CPCH02M7/5387H02M1/0003
Inventor 郭伟魏妙李涛周成杰王心
Owner 上海劭能新能源科技有限公司
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