A new power quality control device and method for distribution network

A power quality and control device technology, applied in the electric power field, can solve the problems of large installation and maintenance workload, low cost performance, incomplete theory, etc., and achieve the effect of improving safety and flexibility, facilitating remote automatic management, and expanding the scope of application

Active Publication Date: 2016-02-17
LIAONING LIDE ELECTRICAL POWER ENG DESIGN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, it is not perfect, but in practice, it often happens that one loses sight of the other, and even brings adverse effects on each other.
Since compensation is performed independently with different devices, it is difficult to achieve the purpose of complete compensation
Large installation and maintenance workload, low cost performance

Method used

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  • A new power quality control device and method for distribution network
  • A new power quality control device and method for distribution network
  • A new power quality control device and method for distribution network

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Embodiment Construction

[0031] The technical solution of the present invention will be described in detail below with reference to the specific embodiments of the drawings.

[0032] Reference figure 1 , A new power quality control device for distribution network, the device includes a harmonic current detection unit, a current and voltage control unit, a drive unit, an inverter bridge, a protection unit, a connected reactance, an output filter unit, a harmonic current detection unit and a non- The linear load is connected and connected in series with the current and voltage control unit, the drive unit, the inverter bridge, and the connecting reactance. The output end of the inverter bridge is connected with the output filter unit and then connected to the public connection point of the power grid. The inverter bridge is connected with a protection unit; the current and voltage control unit and the harmonic current detection unit adopt a DSP signal processor.

[0033] Among them, the harmonic current dete...

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PUM

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Abstract

The invention discloses a novel device and method for controlling the electric energy quality of a power distribution network. The device comprises a harmonic current detection unit, a current and voltage control unit, a driving unit and an inverter bridge, which are connected in series, wherein an output end of the inverter bridge is connected with a grid common connecting point; the output end of the inverter bridge is connected with a high-pass filter, and then is connected with the grid common connecting point; the inverter bridge is connected with a protection unit; and the current and voltage control unit and the harmonic current detection unit adopt digital signal processors (DSP). The invention also provides the novel method for controlling the electric energy quality of the power distribution network. According to the device and the method, the electric energy quality can be improved, and the safe and economic operation level of a power system is improved.

Description

Technical field [0001] The invention belongs to the field of electric power technology, and relates to a novel power quality control device and method for a distribution network. Background technique [0002] With the development of global high technology, electronic technology has been more widely used. High-power converter and frequency conversion equipment have been widely used in industrial systems, especially in power systems, as well as our daily use of televisions and inverter air conditioners. These high-tech equipments bring us convenience and also generate a large number of high-order harmonics, such as the 3rd, 5th, 7th, etc. When the content of these harmonics exceeds a certain value, it will seriously affect the normal operation of electronic equipment. Damage to electronic equipment. When most non-linear power electronic equipment is running, the fundamental current lags behind the grid voltage, consuming a lot of reactive power and generating a lot of harmonic cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18G06Q50/06
CPCY02E40/30Y02E40/40
Inventor 张玉良柳杨关微郭洪月徐维东陈明非张三勇李檀赵波张津铭
Owner LIAONING LIDE ELECTRICAL POWER ENG DESIGN CO LTD
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