Feedforward voltage drop and surge compensation device based on wind and photoelectric complementation, and method

A voltage drop and compensation device technology, applied in wind power generation, AC network voltage adjustment, single network parallel feeding arrangement, etc., can solve problems such as subsidence, influence promotion, development, and trouble dynamic voltage compensators, and achieve low cost, Small size, the effect of protecting the load

Inactive Publication Date: 2014-10-15
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

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  • Feedforward voltage drop and surge compensation device based on wind and photoelectric complementation, and method
  • Feedforward voltage drop and surge compensation device based on wind and photoelectric complementation, and method
  • Feedforward voltage drop and surge compensation device based on wind and photoelectric complementation, and method

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Embodiment Construction

[0049] The following will further describe the feedforward voltage drop surge compensation device and method based on wind-power complementation according to the specific embodiments and the accompanying drawings, but this description does not constitute an improper limitation of the present invention.

[0050] figure 1 It shows an embodiment of the feed-forward voltage drop surge compensation device based on wind and electricity complementarity described in the present invention. figure 2 and image 3 The topological diagrams of the H-bridge inverter unit 3 and the grid-connected inverter 8 in this embodiment are shown respectively.

[0051] Such as figure 1 As shown, the device includes: a controller 1, a rectification unit 21, a DC boost unit 22, an H-bridge inverter unit 3, a bypass switch 4, a wind power DC voltage sensor 51, a wind power DC current sensor 61, and a photoelectric DC voltage sensor 52 , photoelectric DC current sensor 62, AC voltage sensor 7, grid-conn...

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Abstract

The invention discloses a feedforward voltage drop and surge compensation device based on wind and photoelectric complementation. The compensation device comprises a wind power generator, a rectification unit, a solar photovoltaic cell panel, a direct current voltage boosting unit, an H bridge inversion unit, a bypass switch, a grid-connected inverter, a direct current chopper unit, a direct current detection device, a direct current voltage detection device, an alternating current voltage detection device and a controller, wherein the controller is connected with the direct current detection device, the direct current voltage detection device, the rectification unit, the wind power generator and the direct current voltage boosting unit respectively, judges a working state of a grid according to a voltage value transmitted by the alternating current voltage detection device to control the H bridge inversion unit to output alternating current voltage to compensate voltage drop or surge of the grid, controls the grid-connected inverter to inject electric energy into the grid, and controls the direct current chopper unit to release the electric energy. The invention further discloses a method for compensating the voltage drop and the surge based on the compensation device.

Description

technical field [0001] The invention relates to a voltage compensation device and method, in particular to a wind power-based voltage compensation device and method. Background technique [0002] Developed countries have very high requirements on power quality. Power quality problems will not only bring great economic losses to the industry, such as shutdown and restart, which will increase production costs, damage responsive equipment, scrap semi-finished products, and reduce product quality. Marketing difficulties will damage the company's image and good business relations with users, and it will also bring harm to equipment in important power-consuming departments such as medical care, causing serious production and operation accidents. Research by the Electric Power Research Institute (EPRI) of the United States shows that power quality problems cause US industry to lose $30 billion in data, materials and productivity every year (Electric Power Research Institute, 1999);...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12H02J3/38
CPCY02E10/76
Inventor 王坤高峻赵艳萍戴明明赵辉
Owner STATE GRID CORP OF CHINA
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