Rotor position estimation and correction method for permanent magnet synchronous generator

A generator rotor, permanent magnet synchronous technology, applied in the direction of controlling generators, electrical components, control systems, etc., can solve the problems affecting the reliability of the system, limiting the scope of use of the system, and the accuracy of the sensor is difficult to meet the requirements, and achieves good application prospects, Strong anti-interference ability, achieve simple effect

Active Publication Date: 2009-08-12
NARI TECH CO LTD +1
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Problems solved by technology

However, this type of sensor has problems such as installation, cable connection, failure, etc., and affects the reliability of the system and limits the scope of use of the system. It

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  • Rotor position estimation and correction method for permanent magnet synchronous generator
  • Rotor position estimation and correction method for permanent magnet synchronous generator
  • Rotor position estimation and correction method for permanent magnet synchronous generator

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[0020] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. However, the present invention is not limited to the examples given.

[0021] The present invention is a method for estimating and correcting the rotor position of a permanent magnet synchronous generator. The method divides the motor rotor 360° electrical angle into 12 electrical angle intervals in sequence with the motor terminal phase voltage and line voltage zero crossing point as the boundary (Such as figure 1 ), the 12 electrical angle intervals are sequentially recorded as the first to the twelfth electrical angle intervals, and the starting point of the first electrical angle interval is the 0° electrical angle of the motor, and each electrical angle interval backward The angle corresponding to the starting point of the angle interval is increased by 30° electrical angle in turn. The specific steps of this method are as follows, se...

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Abstract

The invention provides a method for estimating and correcting the position of a permanent-magnetic synchronous generator rotor. The method comprises the following steps that: by taking zero crossing points of the pole-tip phase/line voltage of a motor as boundaries, a 360-degree electrical angle of a motor rotor is divided into twelve electrical-angle intervals; by taking the relative relation between the phase/line voltage of three phase and zero as a general judgment method of a current angle interval and taking a special judgment process of the current electrical-angle interval provided as a basis, the current electrical-angle interval is judged; according to the electrical rotational speed of the generator rotor, an electrical-angle increment of the motor rotor is obtained through calculation; the sum of the increments of an angle corresponding to an initial point and the electrical angle relative to the initial point in each electrical-angle interval is a position signal of the motor rotor; by taking the quantity of the position signal as the quantity of a basic position signal, the deviation quantity of the position information of the motor rotor is estimated through specific control algorithm; and by taking the deviation quantity as the feedback quantity of a position-correcting link, the quantity of the basic position signal is compensated with an output result through the regulation of a regulator, so that an accurate position signal of the motor rotor can be obtained.

Description

technical field [0001] The invention relates to a method for estimating and correcting the rotor position of a permanent magnet synchronous generator. Background technique [0002] The human demand for energy continues to increase, but the conventional energy available on the earth is limited, and with the massive consumption of non-renewable fuels, the greenhouse effect is generated, and the natural ecological environment continues to deteriorate. The development of renewable, clean and non-polluting new energy has attracted the attention of all walks of life. Among them, wind energy is one of the power generation methods with the most mature technology, the most large-scale development conditions and commercial development prospects in new energy. In recent years, wind energy has made great progress. . In order for wind energy to compete with other energy sources, power generation efficiency, reliability, and cost must be considered. Based on these requirements, wind pow...

Claims

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Application Information

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IPC IPC(8): H02P9/00
Inventor 石磊宋飞朱晓东
Owner NARI TECH CO LTD
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