A parallel quasi-proportional resonant active power filter and its control method

A quasi-proportional resonance, power filter technology, applied in active power filtering, AC network to reduce harmonics/ripples and other directions, can solve the problem that AC volume cannot achieve no static error tracking, etc., to ensure the control effect, guarantee correctness effect

Active Publication Date: 2016-02-17
盛隆电气(北京)有限公司
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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention proposes a parallel quasi-proportional resonant active power filter and a control method to achieve more accurate tracking of the grid frequency and solve the problem that PI tracking cannot achieve static-difference tracking of AC volume , to improve the filtering performance of the active power filter

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  • A parallel quasi-proportional resonant active power filter and its control method
  • A parallel quasi-proportional resonant active power filter and its control method
  • A parallel quasi-proportional resonant active power filter and its control method

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Embodiment Construction

[0032] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings

[0033] figure 1 It is a structural schematic diagram of the quasi-proportional resonance control module of the parallel active power filter of the present invention. Such as figure 1 As shown, a parallel quasi-proportional resonant active power filter includes a quasi-proportional resonant control module. The quasi-proportional resonant control module includes an analog signal conditioning circuit connected in sequence, a FGPA chip, a DSP chip, and an IGBT driver connected to the FGPA chip. Module, the analog signal conditioning circuit performs analog signal conditioning on the grid voltage signal obtained, and inputs the conditioned analog signal to FGPA, converts the analog quantity into digital quantity through AD sampling, and sends it to DSP, which monitors in real time through the software phase-locked loop According to the frequency of grid volt...

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Abstract

The invention provides a parallel type quasi-proportional resonance active power filter and a control method thereof, for tracking a line frequency more accurately, solving the problem that floating track to alternating quantity by PI track cannot be achieved, and thus improving the filter performance of the active power filter. The control method of the parallel type quasi-proportional resonance active power filter comprises the following steps: 1, enabling obtained power grid voltage signals to be subjected to software phase-locked loop to real-time monitor the frequency of the power grid, and thus obtaining a phase angle of A phase positive sequence voltage; 2, real-time modifying resonance angular frequency being subjected to the control of quasi-proportional resonance, so as to enable the resonance angular frequency of the quasi-proportional resonance to always keep fixed proportional relation with the power grid frequency; 3, according to a real-time modified resonance angular frequency and an obtained load current signal, performing quasi-proportional resonance control to take out the reference current of a selected filtering frequency; 4, performing quasi-proportional resonance control to difference of the output reference current and actual output current of the active power filter, outputting a drive signal to drive the connection of IGBT (Insulated Gate Bipolar Transistor).

Description

technical field [0001] The invention relates to the technical field of active power filters, in particular to a parallel quasi-proportional resonant active power filter and a control method. Background technique [0002] Since the 1970s, the power electronic equipment with a large number of nonlinear loads in the power grid has been increasing, resulting in serious harmonic pollution of the power grid. This is mainly due to the non-linear, impact and unbalanced power consumption characteristics of these loads. Therefore, the active power filter technology for harmonic suppression has become one of the research hotspots in the field of power electronics and electrotechnical. Active power filter (APF: Activepowerfilter) is a new type of power electronic device used to dynamically suppress harmonics and compensate reactive power. It can quickly track and compensate harmonics of different sizes and frequencies, so it is called active power filter. , compared to the passive LC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCY02E40/20
Inventor 胡利龙谢洪潮
Owner 盛隆电气(北京)有限公司
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