Magnetic balanced harmonic elimination reactive compensation device and method

A compensation device and magnetic balance technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, harmonic reduction device, etc., can solve the problem of increased power loss of phase line and neutral line of power supply and distribution network, and damage to users , shortened life of lighting lamps, etc., to achieve the effect of no-load loss, energy saving, power supply improvement, and power supply reliability

CN105048464AActive Publication Date: 2015-11-11山东计保电气有限公司
6 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-11-11

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the field of an intelligent power device and a control device, in particular relates to a magnetic balanced harmonic elimination reactive compensation device and a method. According to the device and the method, three-phase unbalanced data of a circuit is acquired by a detector and is also stored and processed, the state of a load diverter switch on a load circuit is controlled so as to control access states of two branches connected with the detector, wherein one branch is provided with a magnetic balanced harmonic elimination device, the detector controls the load diverter switch to have access to the magnetic balanced harmonic elimination device according to power quality on a detection circuit of the detector when an exception occurs, and the original branch is cut off so as to perform magnetic balanced harmonic elimination. The method and the device have the following advantages that: 1, power supply quality is timely and accurately detected to reach economic operation, and operation loss of the original electromagnetic balanced power saver is effectively reduced; 2, switching in and switching out are convenient so as to guarantee power supply; 3, no-load loss can be effectively reduced; and 4, the device and the method are applicable for a place where a load condition is complicated and harmonic wave of a power grid is high, and power supply reliability is increased.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention provides a magnetic balance harmonic elimination reactive power compensation device and method, belonging to the field of intelligent power equipment and control equipment. Background technique

[0002] Power system loads, especially living quarters, hospitals, schools, office buildings, and discontinuously operating factories and mines, undergo repeated peak-valley-peak changes every day, and a large amount of electricity is wasted during holidays.

[0003] Severe power grid pollution and unbalanced three-phase voltage power supply aggravate the loss of electric energy and make users suffer. The main reasons for the above problems are: grid pollution mainly based on harmonics, part of the high-order harmonics in the power supply is generated by the mains, and the other part is caused by low-voltage electrical and electronic equipment, such as the use of inverter power-saving technology, Effective power saving is only performed on a sing...

Examples

Embodiment 1

[0038] Such as figure 1 As shown, the magnetic balance harmonic elimination reactive power compensation device includes a transformer, the secondary side of the transformer is connected to the load, and the switching switches and detectors in series are arranged on the line between the secondary side of the transformer and the load, and the load line There are two parallel branches, one branch is a load switching switch, and the other branch is a magnetic balance harmonic elimination device. The output terminals of the detector are respectively connected to the load switching switch and the magnetic balance harmonic elimination device. One of the two branches connects the load. The magnetic balance elimination device includes a triangular iron core composed of three columns, and each column is wound with a magnetic balance coil and a resonance elimination coil. The first of the two resonance elimination coils is optional. The resonance elimination impedance 7 is connected in s...

Embodiment 2

[0045] This embodiment provides a reactive power compensation method for magnetic balance elimination using Embodiment 1, including the following steps:

[0046] (1) On the line between the output terminal of the transformer and the load, a switching switch and a detector are set in series in series. After the switching switch is closed, the detector starts to collect the three-phase data of the transformer output line, and the collected data is analyzed. storage and processing;

[0047] (2) Set up two parallel branches on the load line, one branch is a load switching switch, and the other branch is a magnetic balance harmonic elimination device. The detector controls the switching of the load switching switch to connect the two branches. One of the roads connects the load;

[0048] (3) Detect the power quality on the line according to the data collected by the detector. When the three-phase is balanced, the detector controls the load switching switch to close, and the transf...

Embodiment 3

[0052] Such as image 3 As shown, this embodiment changes the connection mode of the compensation switching switch 12 and the compensation capacitor 11 on the basis of Embodiment 1, and changes the original delta structure into a star structure, which is suitable for three-phase four-wire lines. Example other structures are identical with embodiment 1.