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Space vector pulse width modulation method of three-phase three-level VIENNA type rectifier

A space vector pulse width, three-level rectification technology, applied in electrical components, output power conversion devices, AC power input into DC power output, etc. The effect of simplifying the calculation and reducing the amount of calculation

Inactive Publication Date: 2011-06-15
易事特电力系统技术有限公司
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Problems solved by technology

However, the calculation of the three-level space vector pulse width modulation method of this three-phase three-level rectifier circuit is still relatively complicated, and the calculation load of the processor is relatively large.

Method used

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  • Space vector pulse width modulation method of three-phase three-level VIENNA type rectifier
  • Space vector pulse width modulation method of three-phase three-level VIENNA type rectifier
  • Space vector pulse width modulation method of three-phase three-level VIENNA type rectifier

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] like figure 1 as shown, figure 1 It is a topological structure diagram of a three-phase three-level six-switch rectifier circuit. Its circuit connection structure is the same as that of a general three-phase three-level rectifier circuit structure. p and n are DC output terminals, and point o is two capacitors C1 on the DC side and the midpoint of C2, six insulated gate bipolar transistors (IGBT) s a1 , S b1 , S c1 , S a2 , S b2 , S c2 These switch tubes are used for power factor correction, three inductors L are used for energy storage and filtering, R l for the load. According to Kirchhoff's voltage-current law and PARK transformation (AC / DC conversion), the state equation of the three-phase three-level six-switch rectifier can be obtained as:

[0025]

[0026] Among them, i d i q are active current and reactive current components respectively, u...

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Abstract

The invention relates to the technology of an uninterruptible power supply, and in particular to a space vector pulse width modulation method of a three-phase three-level VIENNA type rectifier. The method comprises the step of converting the computation under a three-level space vector coordinate system into the computation under a two-level space vector coordinate system by the means of coordinate translation to greatly simplify the computation of the action time for the resultant vector of the voltage vector ualpha and ubeta so as to reduce the computation quantity of a processor of the three-phase three-level rectifier. The space vector pulse width modulation method of the three-phase three-level VIENNA type rectifier is distinct in physical meaning, the decoupling control of active current and reactive current can be realized, the system is better in static and dynamic performances, an input side can be guaranteed to have an unit power factor, and the constant of voltage at a direct current side is realized.

Description

technical field [0001] The invention relates to a three-phase three-level rectifier technology of an uninterruptible power supply (UPS), in particular to a space vector pulse width modulation method of a three-phase three-level VIENNA rectifier. Background technique [0002] As the power level of uninterruptible power supply is getting higher and higher, the traditional two-level converter of uninterruptible power supply, due to its low withstand voltage value, large du / dt (change rate of voltage to time), EMI (electromagnetic interference ) and low inverter efficiency, the two-level converter is not suitable for high-voltage and high-power uninterruptible power supplies. The multi-level converter, because of its large power capacity, low switching frequency, and low output harmonic content, has opened up a new idea for the design and development of high-voltage high-power converters. For example, the three-phase three-level VIENNA rectifier circuit is used as the rectifier...

Claims

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Application Information

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IPC IPC(8): H02M7/217
Inventor 张志张博殷正炎何思模徐海波
Owner 易事特电力系统技术有限公司
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