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Feedforward voltage drop or surge compensation device based on solar photovoltaic power generation, and method

A solar photovoltaic and voltage drop technology, applied in the direction of AC network voltage adjustment, single network parallel feeding arrangement, etc., can solve problems that plague dynamic voltage compensators, affect promotion, development, collapse, etc., achieve low cost, protect load, The effect of small size of the device

Inactive Publication Date: 2014-10-15
STATE GRID CORP OF CHINA +1
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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 or surge compensation device based on solar photovoltaic power generation, and method
  • Feedforward voltage drop or surge compensation device based on solar photovoltaic power generation, and method
  • Feedforward voltage drop or surge compensation device based on solar photovoltaic power generation, and method

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Embodiment Construction

[0043] The feed-forward voltage drop surge compensation device and method based on solar photovoltaic power generation according to the present invention will be further described according to specific embodiments and accompanying drawings, but this description does not constitute an improper limitation of the present invention.

[0044] figure 1 An embodiment of the feed-forward voltage drop surge compensation device based on solar photovoltaic power generation according to the present invention is shown. figure 2 with image 3 The topological diagrams of the H-bridge inverter unit 3 and the grid-connected inverter 8 in this embodiment are shown respectively.

[0045] Such as figure 1 As shown, the device includes: a controller 1, a DC boost unit 2, an H-bridge inverter unit 3, a bypass switch 4, a DC voltage sensor 5, a DC current sensor 6, an AC voltage sensor 7, and a grid-connected inverter 8 , DC Chopper unit 9 and solar photovoltaic panel 10; wherein, the controller...

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Abstract

The invention discloses a feedforward voltage drop or surge compensation device based on solar photovoltaic power generation. The compensation device comprises 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 and the direct current voltage boosting unit respectively, judges a working state of a grid according to an alternating current 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 or the surge based on the compensation device.

Description

technical field [0001] The present invention relates to a voltage compensation device and method, in particular to a voltage compensation device and method based on photovoltaic power generation. 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 Po...

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Application Information

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