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Parallel-type DC power system power quality conditioner

A power system and power quality technology, applied in parallel operation of DC power supplies, DC network circuit devices, DC circuits can reduce harmonics/ripples, etc., can solve the research and invention of power quality regulators, power quality adjustment technology and devices Unable to adapt to the requirements of the DC power system, few DC power systems and other problems, to achieve the effect of reducing the loss of open circuit faults, stabilizing the voltage, and realizing smooth transfer

Inactive Publication Date: 2016-08-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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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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  • Parallel-type DC power system power quality conditioner
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  • Parallel-type DC power system power quality conditioner

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Embodiment 1

[0036] A parallel DC power system power quality regulator provided by the present invention has a schematic diagram of its circuit structure as shown in figure 1 As shown, it includes: DC / DC bidirectional converter, DC energy storage unit, filter unit, voltage and current signal acquisition unit and controller; the voltage and current signal acquisition unit is connected to the controller, and the controller is respectively connected to the DC / DC bidirectional converter and storage The energy unit, and the DC / DC bidirectional converter are respectively connected to the filter unit and the energy storage unit. More specifically, the DC / DC bidirectional converter is connected to the filter unit through two DC ports c and d, and the DC / DC bidirectional converter is connected to the energy storage unit through the other two DC ports e and f.

[0037] The voltage and current signal acquisition unit is used to acquire the bus voltage and current signals of the DC power system, and t...

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Abstract

The invention provides a parallel-type DC power system power quality conditioner. When voltage drop or rise happens to bus voltage of the DC power system, the parallel-type DC power system power quality conditioner can inject direct current or absorb direct current within a millisecond time, and thus, the bus voltage of the DC power system remains constant or in a certain allowable range, and the purpose of stabilizing the voltage of the DC power system is achieved.

Description

technical field [0001] The invention relates to the field of power system power quality regulation, and more specifically, relates to a parallel DC power system power quality regulator. 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 between the synchronous generators, and w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/02H02J1/10
CPCH02J1/02H02J1/102
Inventor 黎德良张淼袁梓锋苏协飞
Owner GUANGDONG UNIV OF TECH
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