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A harmonic suppression method for output voltage of cascaded power management device

A technology for suppressing output voltage and harmonics, applied to circuit devices, output power conversion devices, electrical components, etc., can solve the problem of high harmonic content of output voltage, achieve reduction of harmonic content, simple control method, and suppression of voltage harmonics wave effect

Active Publication Date: 2021-08-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

[0005] Write directly here that the present invention solves the technical problem of high harmonic content in the output voltage of the connected power quality control device in the prior art, and proposes a harmonic suppression method for the output voltage of the cascaded power control device

Method used

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  • A harmonic suppression method for output voltage of cascaded power management device
  • A harmonic suppression method for output voltage of cascaded power management device
  • A harmonic suppression method for output voltage of cascaded power management device

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Embodiment Construction

[0019] The method for suppressing output voltage harmonics of cascaded electric energy management devices based on dynamic PIR control proposed by the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 2 As shown, the cascaded power management device proposed by the present invention is mainly composed of a phase-shifting transformer, a plurality of cascaded H-bridge inverter units and an energy storage battery pack. The device can solve power quality problems such as three-phase unbalance, current harmonics and voltage fluctuations.

[0021] The present invention as figure 1 As shown, the proposed cascaded power management device output voltage harmonic suppression method based on dynamic PIR control is to introduce a resonant regulator on the basis of the conventional waveform modulation method.

[0022] Three-phase current i a i b i c The i of the 5th and 7th harmonics contained in the Park transfor...

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Abstract

The invention proposes a harmonic suppression method for the output voltage of a cascaded electric energy management device, which belongs to the technical field of power electronic device control and is applied to a cascaded electric energy management device. After the outlet of the cascaded power management device is stepped down, it directly supplies power to the load; in order to suppress the harmonics of the output voltage of the cascaded power management device, especially the harmonics under nonlinear loads, a resonance regulator is connected in parallel with the traditional PI regulator. regulator, in which the resonant regulator is dynamically changed according to the harmonic content of the output current monitored in real time. The method can effectively suppress the harmonic content of the output voltage, and the control method is simple, without changing the topology of the existing circuit, only needing to add a corresponding circuit, which is easy for engineering implementation.

Description

technical field [0001] The invention belongs to the technical field of control of power electronic devices, and in particular relates to a method for suppressing output voltage harmonics of cascaded electric energy management devices based on dynamic PIR control. Background technique [0002] With the development of the economy, a number of high-tech industries represented by precision machining, chip electronics manufacturing, and data centers have developed rapidly. The requirements for power quality are high, which makes the problem of power quality more and more prominent. The cascaded power quality control device developed based on semiconductor devices and modern control theory can solve common power quality problems such as three-phase unbalance, current harmonics and voltage fluctuations. [0003] The cascaded power quality control device consists of a phase-shifting transformer, multiple rectifiers, multiple cascaded H-bridge inverter units, and an energy storage b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02M1/12
CPCH02J3/00H02M1/12H02M1/007
Inventor 万承宽汤浩吴迪方明
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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