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Novel device and method for controlling electric energy quality of power distribution network

A technology of power quality and control devices, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, data processing applications, etc., can solve problems such as heavy installation and maintenance workload, low cost performance, and incomplete theory. To achieve the effect of convenient remote automatic management, improve security and flexibility, and expand the scope of application

Active Publication Date: 2013-08-07
LIAONING LIDE ELECTRICAL POWER ENG DESIGN CO LTD
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AI Technical Summary

Problems solved by technology

Theoretically, it is not perfect, but in practice, it often happens that one loses sight of the other, and even brings adverse effects on each other.
Since compensation is performed independently with different devices, it is difficult to achieve the purpose of complete compensation
Large installation and maintenance workload, low cost performance

Method used

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  • Novel device and method for controlling electric energy quality of power distribution network
  • Novel device and method for controlling electric energy quality of power distribution network
  • Novel device and method for controlling electric energy quality of power distribution network

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Embodiment Construction

[0031] The technical solution of the present invention will be described in detail below in conjunction with specific embodiments of the accompanying drawings.

[0032] refer to figure 1 , a new power quality control device for distribution network, the device includes a harmonic current detection unit, a current and voltage control unit, a drive unit, an inverter bridge, a protection unit, a connection reactance, an output filter unit, a harmonic current detection unit and a non- The linear load is connected, and connected in series with the current and voltage control unit, the drive unit, the inverter bridge, and the connecting reactance in sequence, and the output terminal of the inverter bridge is connected to the output filter unit and then connected to the common connection point of the power grid. The inverter bridge is connected with a protection unit; the current and voltage control unit and the harmonic current detection unit adopt DSP signal processor.

[0033] Am...

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Abstract

The invention discloses a novel device and method for controlling the electric energy quality of a power distribution network. The device comprises a harmonic current detection unit, a current and voltage control unit, a driving unit and an inverter bridge, which are connected in series, wherein an output end of the inverter bridge is connected with a grid common connecting point; the output end of the inverter bridge is connected with a high-pass filter, and then is connected with the grid common connecting point; the inverter bridge is connected with a protection unit; and the current and voltage control unit and the harmonic current detection unit adopt digital signal processors (DSP). The invention also provides the novel method for controlling the electric energy quality of the power distribution network. According to the device and the method, the electric energy quality can be improved, and the safe and economic operation level of a power system is improved.

Description

technical field [0001] The invention belongs to the field of electric power technology, and relates to a novel power quality control device and method for a power distribution network. Background technique [0002] With the development of global high-tech, electronic technology has been more widely used. High-power converters and frequency conversion equipment have been widely used in industrial systems, especially in power systems, as well as TV sets and frequency conversion air conditioners in our daily applications. While these high-tech devices bring us convenience, they also generate a large number of high-order harmonics, such as 3rd, 5th, 7th, etc. When these harmonic content exceeds a certain value, it will seriously affect the normal operation of electronic equipment, and seriously damage electronic equipment. When most nonlinear power electronic equipment is running, the fundamental current lags behind the grid voltage, consumes a lot of reactive power and genera...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18G06Q50/06
CPCY02E40/30Y02E40/40
Inventor 柳杨李檀张三勇关微徐维东邓雯雯
Owner LIAONING LIDE ELECTRICAL POWER ENG DESIGN CO LTD
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