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Integrated device of efficient light voltage parallel network and mixed active power filter

A power filter and filter capacitor technology, applied in photovoltaic power generation, output power conversion devices, electrical components, etc., can solve the problem of low utilization rate, heavy reactive power and harmonic load, and low output power of hybrid active power filter. and other issues to achieve the effect of improving utilization and improving efficiency

Inactive Publication Date: 2008-08-06
SUN YAT SEN UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the time-varying characteristics of the nonlinear load of the power grid, sometimes the reactive power and harmonic load are heavy, and the load current distortion is very severe. At this time, the hybrid active power filter outputs high-power reactive power and harmonic current to compensate it. The capacity has been well utilized, but in some cases the reactive power and harmonic loads of the power grid are relatively light, the output power of the hybrid active power filter is very small, and its utilization rate is very low or even idle

Method used

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  • Integrated device of efficient light voltage parallel network and mixed active power filter
  • Integrated device of efficient light voltage parallel network and mixed active power filter
  • Integrated device of efficient light voltage parallel network and mixed active power filter

Examples

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Embodiment 1

[0026] Fig. 2 is a schematic diagram of an embodiment of the present invention, the solar cell array [1] adopts a plurality of Sanyo high-performance HIT batteries connected in series and in parallel, and it converts solar energy into direct current energy; in order to prevent current from flowing into the photovoltaic array, in the photovoltaic array The anti-reverse diode [2] is connected in series on the output side, the capacitor [3] adopts an electrolytic capacitor, the inverter [4] adopts a full-bridge inverter structure, and the power electronic device adopts a Mitsubishi intelligent power module (IPM). Non-inductive capacitors and fast recovery diodes constitute the buffer circuit of the inverter, and the output of the inverter is connected to a low-pass filter composed of inductance [5] and capacitor [6]. The passive power filter [7] is formed by parallel connection of 5th single-tuned filter and 7th single-tuned filter. The system controller uses DSP as the core to m...

Embodiment 2

[0028] Compared with Embodiment 1, the difference lies in that a transformer is connected in parallel to the filter capacitor [6] for electrical isolation and voltage and current parameter matching.

Embodiment 3

[0030] Compared with Embodiment 1, the difference is that the filter capacitor [6] is omitted, and only a reactor is used for filtering.

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Abstract

The invention discloses an integrated device of high efficiency photovoltaic grid-connection and hybrid active power filter, belonging to the technical fields of the electrical engineering and the solar photovoltaic utilization. The integrated device is basically characterized in that: through utilizing solar battery array, the device absorbs sunshine energy and converts the sunshine energy into electric energy, then changes the electric energy into alternating current through a power converter, and the alternating current is transferred to a power network through a passive power filter formed by inductance and capacitance after filtered by a low pass filter. The passive power filter and a photovoltaic grid-connection inverter are connected in series, the passive power filter bears primary fundamental voltage, the voltage of the direct current side of the photovoltaic grid-connection inverter is very low, thus a photovoltaic array can be directly connected with the photovoltaic grid-connection inverter without a boosted circuit, the generating efficiency of the photovoltaic grid-connection is improved. In addition, the integrated device of high efficiency photovoltaic grid-connection and hybrid active power filter also has the functions of an active power filter at the same time, makes the power network carry out reactive power compensation and controls the harmonic of the power network, reduces the power network loss and improves the quality of power supply. The integrated device of high efficiency photovoltaic grid-connection and hybrid active power filter has the advantages of simple structure, high efficiency and multi-function.

Description

technical field [0001] The invention integrates high-efficiency photovoltaic grid connection and hybrid active power filter, and belongs to the fields of electrical engineering and solar photovoltaic utilization. Background technique [0002] Energy is an important material basis for developing the national economy and improving people's living standards. Due to the depletion of traditional petrochemical energy sources in the world, ensuring the sustainable development of energy and the environment, especially the supply of primary energy is a major strategic issue facing our country. Renewable energy will gradually replace fossil energy and become the energy source for sustainable development of mankind. Among the renewable energy sources, the one with the greatest potential is solar energy. Solar photovoltaic power generation is an important way to utilize solar energy. It has the advantages of non-polluting, renewable, and not subject to regional restrictions. It is als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02M1/12
CPCY02E10/563Y02A30/60Y02E10/56
Inventor 付青
Owner SUN YAT SEN UNIV
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