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On-line dynamic harmonic treatment device

A harmonic control and dynamic technology, applied to harmonic reduction devices, AC networks to reduce harmonics/ripples, reactive power compensation, etc., can solve problems such as electrical equipment overload, automatic device malfunction, interference, etc., to achieve The effect of reducing harmonic current, increasing service life and reducing aging speed

Inactive Publication Date: 2011-03-23
国网南自控股(杭州)有限公司
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AI Technical Summary

Problems solved by technology

However, when these devices work, they will inevitably inject harmonic current into the grid, which will distort the voltage waveform at the common connection point, pose a potential threat to the safe, high-quality, and economical operation of the power system, and bring great harm to the surrounding electrical environment. Pollution
Specifically, harmonics will reduce the production, transmission and utilization efficiency of electric energy, cause electrical equipment to overload, heat up or even burn out, cause local parallel resonance or series resonance in the power system, cause relay protection and automatic device malfunction, and make electric energy Measurement errors, etc., seriously interfere with and endanger the performance and normal operation of electronic equipment and protection and control equipment
[0003] In the existing technology, the adjustment speed of the harmonic removal device is mostly around 20ms, and generally it takes a certain time to start, so that the harmonic control device has a certain empty section. Therefore, how to effectively and efficiently Continuous and uninterrupted removal of harmonics is the purpose of the present invention

Method used

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0016] The online dynamic harmonic control device includes a busbar 1, a harmonic detection circuit 4, a power conversion circuit 5, an IGBT inverter 3, and a main circuit 2. The power conversion circuit 5 includes a DC bus capacitor 51 and a power conversion module 52 , the DC bus capacitor 51 is connected to the IGBT inverter 3 , and the power conversion module 52 is connected to the harmonic detection circuit 4 . The harmonic detection circuit 4 includes a harmonic detection module 41, an adjustment monitoring module 42, and a drive circuit 43. The busbar 1 is connected in series with the harmonic detection module 41, the adjustment monitoring module 42, and a drive circuit 43 in sequence, and the drive circuit 43 is connected to the power conversion module. 52 and IGBT inverter 3 . The main circuit 2 includes a circuit breaker 21, a fuse 22...

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Abstract

The invention relates to an electronic device, in particular to an on-line dynamic harmonic treatment device which comprises a bus, a harmonic detection loop, a power supply transformation loop, an IGBT (Insulated Gate Bipolar Translator) inverter and a main loop. When current passes through the bus, the harmonic detection loop detects the power factor and the harmonic current of a power grid, and the IGBT inverter can generate a capacitive current having the same magnitude and a different direction compared with the current of the bus for the power grid to eliminate electronics. In the invention, the electronic detection loop only works when current passes through the bus, thus lagging conditions cannot occur, and the whole regulating speed is lower than 10ms.

Description

technical field [0001] The invention relates to an electronic device, in particular to an online dynamic harmonic control device. Background technique [0002] Since the 1980s, various power electronic devices have been widely used. However, when these devices work, they will inevitably inject harmonic current into the grid, which will distort the voltage waveform at the common connection point, pose a potential threat to the safe, high-quality, and economical operation of the power system, and bring great harm to the surrounding electrical environment. pollute. Specifically, harmonics will reduce the production, transmission and utilization efficiency of electric energy, cause electrical equipment to overload, heat up or even burn out, cause local parallel resonance or series resonance in the power system, cause relay protection and automatic device malfunction, and make electric energy Measurement errors, etc., seriously interfere with and endanger the performance and no...

Claims

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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 童淮安杜小毛李飞龙
Owner 国网南自控股(杭州)有限公司
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