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Improved model predictive direct torque control method for permanent magnet synchronous generator

A technology of direct torque control and generator model, which is applied in motor generator control, electronically commutated motor control, generator control, etc., and can solve problems such as multi-CPU resources, a large number of coordinate transformation calculations, and occupancy

Inactive Publication Date: 2018-01-02
HEFEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0003] 1) The existing permanent magnet synchronous motor model prediction direct torque control technology is implemented on the synchronous rotating coordinate system, which requires a large number of coordinate transformation operations and occupies more CPU resources;
[0004] 2) The existing permanent magnet synchronous motor model predictive direct torque control technology needs to use four electrical parameters of the permanent magnet synchronous motor for predictive control, which has strong parameter dependence and poor robustness

Method used

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  • Improved model predictive direct torque control method for permanent magnet synchronous generator
  • Improved model predictive direct torque control method for permanent magnet synchronous generator
  • Improved model predictive direct torque control method for permanent magnet synchronous generator

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Embodiment Construction

[0070] The invention is an improved model-predicted direct torque control method of a permanent magnet synchronous generator. The method realizes the model-predicted direct torque control on a stationary αβ coordinate system, thereby simplifying calculation and improving parameter robustness.

[0071] figure 1 The overall block diagram of the algorithm proposed by the present invention is given. Depend on figure 1 As can be seen, the present invention is realized through the following steps:

[0072] Step 1, the sampled permanent magnet synchronous generator voltage u at time k ab , u bc and current i a i b i c , get the voltage u on the stationary coordinate system α (k), u β (k) and current i α (k), i β (k), such as figure 1 shown; where, k increases continuously with the operation of the controller, k=1, 2, 3...;

[0073] Step 2, the voltage u of the permanent magnet synchronous generator at time k obtained in step 1 α (k), u β (k) and current i α (k), i β (...

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Abstract

The invention discloses an improved direct torque control method for model prediction of a permanent magnet synchronous generator, and belongs to the field of motor speed regulation. The improved direct torque control method is characterized in that a direct torque control for the model prediction of the permanent magnet synchronous generator is achieved on a static coordinate system on the basis of a full-order sliding-mode observer, so that use of a d-axis inductance parameter of the generator in the prediction process is avoided; and the robustness of a control system on a q-axis inductance parameter change of the generator is improved. Meanwhile, according to the method, coordinate transformation operation from the static coordinate system to a synchronous rotating coordinate system is avoided, so that the algorithm is simplified. In addition, a new target function is built on the basis of a virtual torque, so that a weight factor is eliminated and the system design is simplified.

Description

technical field [0001] The invention relates to the application of model predictive control in the drive control field of permanent magnet synchronous generators, such as the application of permanent magnet synchronous generators in the field of direct drive wind power generation. Background technique [0002] With the depletion of non-renewable energy sources such as oil and natural gas, new energy technologies have been vigorously developed. Wind power technology efficiently converts renewable wind energy resources into electrical energy, providing new energy for the sustainable development of mankind. The direct-drive wind power generation system based on the permanent magnet synchronous generator has been widely used due to its advantages of no gearbox and strong grid adaptability. With the gradual development of wind power generation system to medium voltage and high power, the switching frequency is getting lower and lower, and the control performance of conventional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/30H02P21/13
CPCH02P21/0007H02P21/13
Inventor 张兴郭磊磊杨淑英谢震曹朋朋李浩源
Owner HEFEI UNIV OF TECH
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