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Inverter control method based on fractional order PI forecasting function

A technology of prediction function and control method, which is applied in the direction of converting irreversible DC power input to AC power output, wind power generation, etc.

Active Publication Date: 2013-08-28
南京市嘉隆电气科技股份有限公司
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Problems solved by technology

The power system is also difficult to establish an accurate mathematical model, but at the same time it is a fast system. The traditional predictive control has a large amount of online calculation and poor real-time performance, so it is not suitable for the excitation control of the power system.
However, there is no literature or report on the application of the method of combining fractional PI (Proportional Integral, proportional integral) and predictive function control to the control of synchronous generator excitation system.

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  • Inverter control method based on fractional order PI forecasting function
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Embodiment Construction

[0031] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0032] The purpose of the present invention is to introduce the method of combining fractional PI and predictive function control into the single-phase inverter control system to replace the traditional PI control and provide a new control strategy.

[0033] 1. Select basis function and reference trajectory

[0034] Predictive functional control regards the control input structure as the key to affect the system performance. In predictive function control, when the input signal spectrum is limited, the control input only belongs to a set of specific basis function families related to the reference trajectory and object properties, so the importance of the selection of basis functions can be imagined. In particular, for linearity, the output of the system will be a weighted combination of the above basis functions applied to the response of the obje...

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Abstract

The invention discloses an inverter control method based on a fractional order PI forecasting function and belongs to the technical field of inverter control. According to the control method, an optimized control value is obtained by optimization computing, the control value is used as an input signal of an inverting driving circuit, the purpose that inverter output currents are controlled so that output voltages of the inverter can be affected is achieved, steady-state characteristics are good, response time is short, loading adaptability is strong, anti-jamming capability is strong, and the inverter control method is suitable for a grid-connected inverter in a wind generating system.

Description

technical field [0001] The invention discloses an inverter control method based on a fractional order PI prediction function, belonging to the technical field of inverter control. Background technique [0002] In the actual power system, sometimes it is necessary to convert DC power into AC power for the load. This process of converting DC power into AC power is called inverter. Many existing power sources, such as batteries and solar cells, are DC power sources. When these power sources are required to supply power to AC loads, inverters are required. It is generally believed that the development of inverter technology can be divided into the following three stages. [0003] The period from 1956 to 1980 was the traditional development stage. The characteristics of this stage are that the switching devices are mainly low-speed devices, the switching frequency of the inverter is low, the improvement of the output voltage waveform is mainly based on the multiple superposition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
CPCY02E10/76
Inventor 郭伟徐金成钱承山陈一帆程远
Owner 南京市嘉隆电气科技股份有限公司
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