Control system and control method for double-frequency stator double-winding five-phase induction generation system

A technology of stator double winding and power generation system, which is applied in asynchronous generator control and control of generators through magnetic field changes, can solve problems such as suboptimal system efficiency and underutilization of generator current capacity.

Active Publication Date: 2015-12-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The traditional control methods are based on the sinusoidal signal power generation operation idea, which theoretic

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  • Control system and control method for double-frequency stator double-winding five-phase induction generation system
  • Control system and control method for double-frequency stator double-winding five-phase induction generation system
  • Control system and control method for double-frequency stator double-winding five-phase induction generation system

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Embodiment Construction

[0059] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] based on figure 1 A dual-frequency stator dual-winding five-phase asynchronous power generation system is shown. The present invention provides a control system. The control system includes a voltage and current signal acquisition unit, a first coordinate transformation unit, a first frequency and phase calculation unit, and a first The given frequency and current calculation unit, the second frequency and current calculation unit, the second coordinate transformation unit, the current loop control unit and the pulse width modulation unit, wherein the voltage and current signal acquisition unit is used to receive the line voltage u of the five-phase asynchronous motor cab ,u cbc ,u ccd ,u cde , phase current i ca ,i cb ,i cc ,i cd ,i ce , the DC voltage u on the control winding side cDC (the first DC voltage) and the DC volt...

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Abstract

The invention discloses a control method for a double-frequency stator double-winding five-phase induction generation system. The method comprises the following steps: collecting line voltage and phase current of a dual stator winding five-phase induction motor, first direct current voltage of a control winding side and second direct current voltage of a power winding side; respectively converting the line voltage and the phase current into a two-phase static coordinate system; calculating given current of a first frequency and the given current of a second frequency; calculating a phase signal of the first frequency, and converting the given current of the first frequency and the given current of the second frequency into a four-phase static coordinate system from a four-phase rotating coordinate system; and calculating given voltage in the static coordinate system and outputting a pulse width modulation voltage signal. According to the control method, control on optimal output of double-frequency signals and energy of the generation system under double frequencies can be achieved from the perspective of a control strategy on the basis of not changing generator hardware. The invention further discloses a control system for the double-frequency stator double-winding five-phase induction generation system.

Description

technical field [0001] The invention belongs to the technical field of DC power generation, and in particular relates to a control system and a control method applied to a dual-frequency stator double-winding five-phase asynchronous power generation system. Background technique [0002] According to statistics, due to the increase in investment in developing countries, nearly half of the global investment in new power generation technologies is used in renewable energy. The United Nations Environment Programme's Global Trends in Renewable Energy Investment report shows that in 2014 9.1% of the world's electricity was generated using renewable energy sources, up from 8.5% the previous year. This increase reduced carbon dioxide emissions by around 1.3 billion tonnes, the report said. A key factor behind the green power boom is the continued price reduction of renewable energy technologies. As a developing country, our country's investment increased by 37% to 83 billion US do...

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Application Information

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IPC IPC(8): H02P9/14H02P103/10
Inventor 许海军卜飞飞黄文新刘皓喆赵勇朱琳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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