Electric energy quality regulator for direct current power system

A power system, power quality technology, applied in the direction of DC circuit to reduce harmonics/ripple, load balance in DC network, etc., can solve few DC power systems, power quality regulator research and invention, power quality regulation The technology and device cannot adapt to the requirements of the DC power system, etc., to achieve the effect of smoothing the DC bus voltage and current waveforms, reducing the loss of open-circuit faults, and smoothing the transfer.

Inactive Publication Date: 2016-06-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current power quality control devices are all designed for AC power systems, and there are few researches and inventions on power quality conditioners for DC power systems.
Once the DC power system is put into use, similar power quality problems will inevitably be encountered, and the existing power quality regulation technologies and devices will basically not be able to meet the requirements of the DC power system

Method used

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  • Electric energy quality regulator for direct current power system
  • Electric energy quality regulator for direct current power system
  • Electric energy quality regulator for direct current power system

Examples

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Embodiment 1

[0040] A DC power system power quality conditioner provided by the present invention has a schematic diagram of its circuit structure as shown in figure 1 shown, including: a parallel compensator, a series compensator, an energy storage unit, a voltage and current signal acquisition unit and a controller; the voltage and current signal acquisition unit is connected to the controller, and the controller is respectively connected to the first DC / DC of the parallel compensator The bidirectional converter 1, the second DC / DC bidirectional converter 2 and the energy storage unit of the series compensator, and the first DC / DC bidirectional converter 1 of the parallel compensator are respectively connected to the first filter unit 3 and the energy storage unit, The second DC / DC bidirectional converter 2 of the series compensator is respectively connected to the second filter unit 4 and the energy storage unit. More specifically, the first DC / DC bidirectional converter 1 of the parallel...

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Abstract

The invention provides a DC power system power quality regulator. When harmonic currents appear on the DC bus of the DC power system, the hybrid DC power system power quality regulator can filter out the harmonic current in the DC bus. Or when harmonic voltage appears on the DC bus of the DC power system, the hybrid DC system power quality conditioner can filter out the DC bus harmonic voltage, smooth the DC bus voltage and current waveform, and realize the balance between the power supply side and the load side. Harmonic isolation, preventing harmonics from flowing in both directions between the two.

Description

technical field [0001] The invention relates to the field of electric power quality regulation in electric power systems, and more specifically relates to a power quality regulator for direct current electric power systems. Background technique [0002] With the development of the power system, the shortcomings and limitations of the AC power system have become increasingly prominent. In the AC transmission line, in addition to the resistance loss of the wire, there is also the loss of the AC inductance, the line loss is large, and the long-distance transmission efficiency is low. In the AC transmission line, if any phase has a permanent fault, the whole line must be cut off, and the loss of the fault will be large. AC power transmission must run synchronously, and phase consistency must also be considered for grid-connected AC systems, which complicates control. In the AC distribution network, the AC transmission capacity is limited by the stability of the power angle bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/14H02J1/02
CPCH02J1/14H02J1/02
Inventor 黎德良张淼苏协飞袁梓锋
Owner GUANGDONG UNIV OF TECH
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