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Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system

A power filtering and hybrid system technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, harmonic reduction devices, etc., can solve the problem of large additional loss of main equipment, low system power factor, low system operating efficiency, etc. problem, to achieve the effect of realizing the nearest dynamic compensation, the content of harmonic current is small, and the circulation path is shortened

Active Publication Date: 2012-01-25
HUNAN UNIV
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Problems solved by technology

[0003] In order to eliminate the restrictive effect of system impedance on power filter performance, solve the impact of frequency fluctuations on the grid side and nonlinear load side on power filter performance; A series of problems such as serious harmonic pollution, large additional loss of main equipment, large vibration and noise, low system power factor, and low system operating efficiency brought by power to the industrial power distribution system itself, the present invention proposes an automatic Hybrid system of resonant power filter and continuous reactive power compensation

Method used

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  • Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system
  • Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system
  • Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system

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[0020] see figure 1 , the low-voltage winding of the rectifier transformer 1 adopts the same-phase and anti-parallel delta connection mode, and a rectifier 16 is externally connected to meet the low-voltage and high-current power supply requirements of the variable DC load 17 . The medium-voltage winding adopts a delta connection mode and is externally connected to a dynamic hybrid filter and continuous reactive power compensation system 2; the high-voltage winding adopts a star-type connection mode and is connected to an equivalent AC power source 18 (industrial power distribution system or external power grid) on the grid side.

[0021] The dynamic hybrid filter and continuous reactive power compensation system 2 includes a dynamic hybrid filter system 4 , a thyristor controlled reactor 5 and a shunt capacitor 6 . Among them, the dynamic hybrid filter system 4 is composed of 5th harmonic automatic resonance filter branch 7, 7th harmonic automatic resonance filter branch 8, 1...

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Abstract

The invention discloses an implementation method of automatic resonance type electric power filtering and continuous reactive power compensation. When a resistant of an automatic resonance type electric power filtering and continuous reactive power compensation mixing system is designed, a medium voltage side winding equivalent impedance of a rectification transformer is equal to or approximately equal to 0, meanwhile the equivalent impedance under h harmonic frequency is equal to or approximately equal to 0 under the control of a multiple target mixture controller. By using the method, the restriction to an electric power filtering function by system impedance is eliminated, the influence caused by frequency fluctuations at an electric network side and a nonlinear load side to the electric power filtering performance can be avoided, and the high-efficiency operation of a power supply system is realized.

Description

technical field [0001] The invention belongs to the technical field of harmonic control and reactive power compensation of power systems and industrial power distribution systems, and specifically relates to a hybrid system of automatic resonance power filtering and continuous reactive power compensation. Background technique [0002] Due to the inherent nonlinear effects of power electronic devices, when they are used in power systems and industrial power distribution systems, they will inevitably cause power quality problems such as serious harmonic pollution, low power factor, voltage flicker and imbalance. At present, the main filtering technologies in improving power quality include passive filtering, active filtering and hybrid active filtering. Among them, passive filtering has been widely used in power systems and industrial power distribution systems due to its relatively simple device structure, easy design and manufacture, and low initial investment costs. Howeve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/30Y02E40/40
Inventor 李勇罗隆福许加柱克里斯蒂安·黑汉斯
Owner HUNAN UNIV
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