Wind-powder-based electric power quality cascade compensation method and device

A series compensation and power quality technology, applied in the direction of AC network voltage adjustment, etc., can solve problems that plague dynamic voltage compensators, affect promotion and development, and achieve the effects of reducing losses, protecting grid loads, and ensuring rapid response

Inactive Publication Date: 2013-12-11
国网山东省电力公司聊城供电公司 +1
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Problems solved by technology

Compared with UPS, dynamic voltage compensator can effectively solve the problem of voltage sag. However, the energy storage problem has always plagued the research of dynamic voltage compensator. Although some advanced methods such as minimum energy injection method have been proposed, the additional energy storage Always affect its further promotion and development

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  • Wind-powder-based electric power quality cascade compensation method and device
  • Wind-powder-based electric power quality cascade compensation method and device
  • Wind-powder-based electric power quality cascade compensation method and device

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Embodiment Construction

[0036] The following will further explain and describe the wind power-based power quality series compensation method and device of the present invention in conjunction with the drawings and specific embodiments of the specification.

[0037] figure 1 Shows the structural block diagram of the wind power-based power quality series compensation device according to the present invention in one embodiment. Such as figure 1 As shown, the wind power-based power quality series compensation device in this embodiment includes: a wind power generator 8, which converts wind energy into alternating current output; and a rectifier module 1, which is connected to the wind power generator 8 to output power from the wind power generator 8. AC power is converted into stable DC power output; H-bridge inverter unit 2, its DC bus is connected to the output terminal of rectifier module 1, and converts the DC power output by rectifier module 1 into AC power output; transformer 4, its primary coil is opp...

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Abstract

The invention discloses a wind-powder-based electric power quality cascade compensation method. The method comprises the following steps of: converting wind energy into alternating current and outputting the alternating current by a wind driven generator; converting the alternating current output by the wind driven generator into stable direct current by adopting a rectifier module, and performing tracking control at the highest power on the rectifier module to ensure that the active power of the direct current output by the rectifier module is maximum; converting the direct current output by the rectifier module into alternating current; and detecting the voltage of an electric network, and if the voltage of the electric network is reduced, controlling an H-bridge inversion unit to output alternating current to compensate the voltage drop of the electric network. Correspondingly, the invention also discloses a wind-powder-based electric power quality cascade compensation device, and the device comprises the wind driven generator, the rectifier module, the H-bridge inversion unit, a grid-connected inverter, a controller and the like.

Description

Technical field [0001] The invention relates to a method and device for power grid voltage compensation, in particular to a method and device for power quality series compensation based on wind power. Background technique [0002] Developed countries have very high requirements for power quality. Power quality problems will not only bring great economic losses to the industry, such as stoppages and restarts will increase production costs, damage sensitive equipment, scrap semi-finished products, reduce product quality, and cause Marketing difficulties will damage the company’s image and good business relationships with users, etc., and will also bring harm to the equipment of important power-using departments such as medical care, causing serious production and operation accidents. A study by the American Electric Power Research Institute (EPRI) shows that power quality problems cause US industries to lose up to 30 billion US dollars in data, materials, and productivity every yea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12
Inventor 孙岳李永旭吴传涛卢之男邵光磊马进
Owner 国网山东省电力公司聊城供电公司
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