Shunt active power filter

A power filter, filter technology, applied in active power filter, AC network to reduce harmonics/ripples and other directions, can solve the problem of zero-sequence potential imbalance, electromagnetic interference, etc., to prevent interference, high anti-interference sexual effect
CN103346567AActive Publication Date: 2013-10-09YANGZHOU HUADIAN ELECTRICAL CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
YANGZHOU HUADIAN ELECTRICAL CO LTD
Publication Date
2013-10-09

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Abstract

The invention discloses a shunt active power filter belonging to the technical field of an active power filter technology. The filter comprises three level inverters, a filter body, a switch tube, a clamp diode, a voltage-dividing capacitor, and six IGBT (insulated gate bipolar translator) drive circuits with two paths of signal output. The drive circuit adopted by the shunt active power filter includes a high-speed optocoupler inside; and a pulse control signal is isolated with inside of the drive circuit, so that electric isolation is achieved by a digital control circuit and the drive circuit; interference caused by electrical coupling can be prevented; gate drive adopts bipolar control voltage; and high anti-interference performance can be obtained by using negative grid voltage.
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Description

technical field

[0001] The invention belongs to the technical field of active power filtering, and in particular relates to a parallel active power filter. Background technique

[0002] Electric energy is an indispensable and important energy in the production of modern society and people's life. With the development of society and the advancement of science and technology, especially the wide application of power electronic devices, on the one hand, the harmonic pollution in the power system increases with the number of nonlinear loads. On the other hand, the power supply side and its power system equipment, users and their electrical appliances have higher and higher requirements for power quality. The increasingly serious harmonic pollution and the higher and higher power quality requirements have formed A pair of sharp contradictions. Due to power quality problems, the harmonics of my country's metallurgical, railway, mining and other enterprises have seriously exceeded...

Claims

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