A low-cost control method for electric power generation system

Abstract

The invention discloses a low-cost power generation system control method. According to the low-cost power generation system control method, a high-frequency signal is injected into Park inverse transformation to obtain a q-axis high-frequency current response value with rotor position signal information, after processing the signal, an estimated value of the generator rotor position signal can be easily obtained without a position sensor, and accordingly the cost is lowered, and the volume is reduced; a fuzzy PI regulator replaces a traditional voltage PI regulator in the voltage regulation, the self-adapting ability and disturbance rejection ability of the generator are improved, and the emitted voltage is more stable; a predicting controller replaces a traditional current PI controller in the current regulation, the hysteresis characteristic of the traditional current PI controller is solved, and the band width and dynamic performance of the power generation system are improved; an SVM is combined with a four-legged converter to improve the system reliability, and the power generation system still can generate power normally when the generator breaks down.

Description

technical field [0001] The invention relates to the field of electric power generation system control technology, in particular to a low-cost electric power generation system control method. Background technique [0002] With the development of power electronics technology and power transmission technology, power generation systems have been widely used. However, in recent years, with the continuous development of new energy and technology, many power generation occasions have put forward higher requirements on the cost, dynamic performance and reliability of the generator power generation system. [0003] At present, there are still some deficiencies or improvements in the generator power generation control method: the current generators all need position sensors, which will increase the cost and volume of the system, and it is inconvenient to use position sensors in some harsh environments; In addition, in the process of power generation, the traditional voltage PI regula...

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Problems solved by technology

[0003] At present, there are still some deficiencies or improvements in the generator power generation control method: the current generators all need position sensors, which will increase the cost and volume of the system, and it is inconvenient to use position sensors in some harsh environments; In addition, in the process of power generation, the traditional voltage PI regulator has relatively poor self-adaption and anti-disturbance capabilities, and the output voltage is not stable enough; at the same time, the current PI controller it uses has inherent hysteresis characteristics, which will affect The dynamic performance of the system and the limitation increase the bandwidth of the system, and the response speed is limited; the reliability of the control of the power generation system is poor. When the generator encounters a winding open circuit or short circuit fault, it cannot perform stable and normal power generation, which seriously affects the power generation performance of the generator.

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