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
CN101989746AInactive Publication Date: 2011-03-23国网南自控股(杭州)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
国网南自控股(杭州)有限公司
Publication Date
2011-03-23
Estimated Expiration
Not applicable · inactive patent

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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.
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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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