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Electric energy adjustment device for active and reactive power adjustment of high-voltage system

A technology of active power and regulating devices, which is applied in the direction of reactive power adjustment/elimination/compensation, circuit devices, reactive power compensation, etc., can solve the problem of no suppression, and achieve the effect of easy operation, simple structure and good regulation effect

Inactive Publication Date: 2010-05-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of system does not have the function of suppressing the fluctuation of the active power output by the wind farm

Method used

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  • Electric energy adjustment device for active and reactive power adjustment of high-voltage system
  • Electric energy adjustment device for active and reactive power adjustment of high-voltage system
  • Electric energy adjustment device for active and reactive power adjustment of high-voltage system

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Embodiment Construction

[0022] The electric energy adjustment device for the active power and reactive power adjustment of the high-voltage system proposed by the present invention has a structure such as figure 1 shown, including:

[0023] U-phase cascaded unit, V-phase cascaded unit and W-phase cascaded unit, the three-phase cascaded units are connected in star form; each phase cascaded unit consists of n full-bridge inverter units and n large capacitor banks ( C u1 、C u2 ...C un ), n automatic switches (K 1 、K 2 ...K n ) and n battery pack units, the n full-bridge inverter units are connected in series, the first end of the first full-bridge inverter unit in each cascaded unit is connected to the corresponding reactor, and each stage The end of the nth full-bridge inverter unit in the cascade unit is connected to the end of the nth full-bridge inverter unit in the other two cascaded units; the DC bus in each full-bridge inverter unit is connected to the The large capacitor banks are connect...

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Abstract

The invention relates to an electric energy adjustment device for active and reactive power adjustment of a high-voltage system, which belongs to the field of electric and electronic technology. The device realizes high-voltage synchronization by adopting a mode of cascading a plurality of shingle-phase full-bridge inversion units, adjusts reactive power and instantaneous active power output by the device, or compensates for phenomena, such as low voltage and three-phase unbalance at a synchronization position, by controlling the charge and discharge of a big capacitor on the direct-current bus of each inversion unit, and adjusts the stable active power output or stored by the device by using an assembled battery unit on the direct-current bus of each inversion unit. The adjustment device of the invention integrates functions of active power adjustment and reactive power adjustment, has strong dynamic adjustment capability, needs no transformers, occupies a small area, has no harmonic wave of output, is simple in maintenance and has relatively comprehensive functions and outstanding cost performance.

Description

technical field [0001] The invention relates to an electric energy regulating device for regulating active power and reactive power of a high-voltage system, and belongs to the technical field of power electronics. Background technique [0002] As a clean energy, wind power has developed rapidly in recent years. Since wind energy is variable in nature, the active power generated by the wind power generation system is also fluctuating. With the increasing capacity of wind farms connected to the grid, this fluctuation will cause serious power quality problems and endanger the stable operation of the grid. Therefore, a wind power generation system needs to be equipped with a power device capable of regulating active power and suppressing fluctuations in electric energy. [0003] In addition, when a disturbance or fault occurs in the grid, the wind farm generally needs to have sufficient dynamic reactive power support capability for the grid, that is, to send reactive power to...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/18H02J3/26H02J3/12H02J3/28
CPCY02E40/50Y02E40/30
Inventor 杨耕万承宽郑伟
Owner TSINGHUA UNIV
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