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Harmonic treating apparatus having passive compensation

A technology for harmonic control and high-power switching, which is applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, and single-network parallel feeding arrangements, which can solve problems such as reducing reliability and increasing system complexity. , to achieve the effect of reducing complexity, reducing electromagnetic interference, and reducing DC side voltage

Active Publication Date: 2011-03-02
SHANGHAI ELECTRIC POWER COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the load current contains multiple harmonic components, corresponding resonant circuits must be set up for the harmonics of different frequencies, which will increase the complexity of the system and reduce the reliability

Method used

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  • Harmonic treating apparatus having passive compensation
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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] Such as figure 1 As shown, the harmonic control device with reactive power compensation of the present invention includes a three-phase independent harmonic control single-phase main circuit, and the harmonic control single-phase main circuit includes sequentially connected single-phase inverter full-bridge DC side voltage Support capacitor bank 1, single-phase inverter full-bridge circuit 2, high-frequency filter circuit 3, passive low-pass filter 4 and harmonic control grid-connected circuit 5, of which:

[0021] Single-phase inverter full-bridge DC side voltage support capacitor bank 1, including the first large-capacity, high-voltage electrolytic capacitor Cd1, the second large-capacity, high-voltage electrolytic capacitor Cd2, and the third large-capacity, high-voltage electrolytic capacitor Cd3 connected in parallel , the fourth large-capacity, high-voltage el...

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Abstract

The invention relates to a harmonic wave control device with reactive power compensation. The device comprises a three-phase independent harmonic wave control single-phase main circuit, wherein, the harmonic wave control single-phase main circuit comprises a single-phase contravariance full-bridge DC side voltage support capacitor bank, a single-phase contravariance full-bridge circuit, a high-frequency filter circuit, a passive low pass filter and a harmonic wave control grid-connected circuit which are connected with each other in sequence. Compared with the prior art, the invention has theadvantages that the harmonic wave control device with reactive power compensation reduces the complexity of control by a novel structure by the three-phase independent harmonic wave control single-phase main circuit; the current of a neutral wire can be completely compensated; electric energy conversion efficiency is larger than 95 percent; C and L in three single-phase contravariance full-bridgecircuits generate resonance vibration to reduce DC side voltage, and simultaneously reduce electromagnetic interference of the device.

Description

technical field [0001] The invention relates to power system equipment, in particular to a harmonic control device with reactive power compensation. technical background [0002] At present, the generation of reactive current loads is mainly through connecting capacitors of a certain capacity in parallel at both ends of the load or series reactors; for changing loads, the current scheme of group switching of capacitors and reactors is mainly used, such as belonging to static reactive power Thyristor Controlled Capacitor (TSC), Thyristor Controlled Reactor (TCR) of Compensator (SVC), etc. [0003] The above schemes generally have undercompensation and overcompensation problems and oscillation problems in the switching process, and may also generate resonance phenomena in the system. For the problem of harmonic pollution caused by nonlinear loads, passive filters of corresponding frequencies composed of inductors and capacitors are mainly used to eliminate the influence of ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/38
CPCY02E40/40
Inventor 关宏周呖昕孙列王媚顾临峰王康张小越仲隽伟
Owner SHANGHAI ELECTRIC POWER COMM