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Power regulator and method based on dq0 conversion method, SVPWM and hysteresis control

A technology of hysteresis control and adjustment method, applied in the field of electric energy regulators based on dq0 conversion method, SVPWM and hysteresis control, can solve the problems of phase error, inability to detect voltage, etc., achieve small switching loss, fast response speed, hardware Simple circuit effect

Inactive Publication Date: 2018-05-15
FUZHOU UNIVERSITY
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Problems solved by technology

But the disadvantage is that this method cannot detect the voltage, and it will also bring a certain phase error

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  • Power regulator and method based on dq0 conversion method, SVPWM and hysteresis control
  • Power regulator and method based on dq0 conversion method, SVPWM and hysteresis control
  • Power regulator and method based on dq0 conversion method, SVPWM and hysteresis control

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[0026] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0027] The present invention provides a power quality conditioner (UPQC) based on dq0 conversion method, SVPWM and hysteresis control, which includes a parallel active filter PAF connected in parallel with the load side, a series active filter PAF connected in series with the load and power supply Source filter SAF, a DC power supply, and a control system; the control system is connected to the parallel active filter PAF and the series active filter SAF respectively; one end of the DC power supply is respectively connected to the parallel active filter PAF The input end is connected to the output end of the series active filter SAF; the other end of the DC power supply is respectively connected to the other input end of the parallel active filter PAF and the other output end of the series active filter SAF; the control system The dq0 conversion...

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Abstract

The invention provides a power regulator and method based on a dq0 conversion method, SVPWM and hysteresis control. The power regulator combines a series active filter and a parallel active filter, sothat the advantages of serial and parallel active filters can be fully used in power system applications. The power regulator has an integrated power quality regulation function. The dq0 conversion method is used to detect harmonic current. Compensation current is compared with actual compensation current, and the comparison result of compensation current and actual compensation current is used as the input of a hysteresis comparator. The input generates a PWM signal which turns a switch on and off, and then compensation current is adjusted. The dq0 conversion method is used to detect harmonic voltage. The PWM signal is generated and comes into the series active filter to control on-off of the inverter switch, and a compensation voltage signal is output and injected into a power grid to compensate for distortion voltage. UPQC uses the dq0 conversion method, an SVPWM algorithm and hysteresis control, and makes full use of the advantages of series and parallel active filters.

Description

technical field [0001] The invention belongs to the field of electric energy quality control, and in particular relates to an electric energy conditioner and method based on dq0 conversion method, SVPWM and hysteresis control. Background technique [0002] The source of harmonics comes from a large number of power electronic devices, because the application of power electronic devices in power systems is becoming more and more important, and the most common one is the rectifier device that is often encountered. In the rectifier circuit, the most common structure is the circuit structure based on the diode and thyristor rectifier circuit. We know that, in addition to the large amount of harmonics generated by the load circuit with resistive sense, there are also more harmonics generated by the circuit using capacitor filtering, which is enough to attract our attention. Therefore, it is extremely urgent to improve the operating environment of the entire power system. At pres...

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Application Information

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IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 金涛陈越灵郭锦涛苏文聪李泽文
Owner FUZHOU UNIVERSITY
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