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A high and low voltage ride through test system based on a series dynamic voltage recovery device

A high-low voltage ride-through, dynamic voltage recovery technology, applied in the field of test systems, can solve the problems of lack of high-voltage ride-through capability, test equipment and solutions, and achieve the effect of fast response, simple and easy implementation

Active Publication Date: 2016-08-10
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high voltage ride through has not yet attracted enough attention, and related research has just started, and there is no equipment and scheme specifically for testing high voltage ride through capability.

Method used

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  • A high and low voltage ride through test system based on a series dynamic voltage recovery device
  • A high and low voltage ride through test system based on a series dynamic voltage recovery device
  • A high and low voltage ride through test system based on a series dynamic voltage recovery device

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Embodiment

[0054] According to the high-low voltage ride-through test system based on the series dynamic voltage recovery device proposed by the present invention, the process of voltage sag alone, the process of voltage swell alone, and the mixed process of voltage sag first and then voltage swell are simulated. . Figure 7 , Figure 8 , Figure 9 Shown are the grid-connected point voltages of the three tests respectively. It can be seen from the figure that this implementation scheme can complete these three functions.

[0055] The invention adopts a series combination of a low-voltage generating device and a high-voltage generating device, which is connected between the wind turbine / photovoltaic power generation system and the power grid, and simulates the voltage sag and voltage swell phenomenon after the grid fault occurs, and the measured wind turbine / photovoltaic power generation system The photovoltaic power generation system is tested for low-voltage ride-through capability a...

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Abstract

The invention relates to new energy power generation and a test system in the field of new energy power generation testing, in particular to a high-low voltage ride-through test system based on a series dynamic voltage recovery device. A structure in which a high-voltage generator and a low-voltage generator are connected in series, the system is connected between the wind turbine and the power grid or between the photovoltaic power generation system and the power grid, to simulate the process of voltage sag and voltage swell, and the switching sequence can be used Carry out separate high-voltage ride-through test, separate low-voltage ride-through test, and mixed test of high-voltage ride-through for wind turbines and photovoltaic power generation systems; the switching sequence logic is simple and easy to implement.

Description

technical field [0001] The invention relates to new energy power generation and a test system in the field of new energy power generation testing, in particular to a high-low voltage ride-through test system based on a series dynamic voltage recovery device. Background technique [0002] In recent years, the installed capacity of wind power and photovoltaic power generation in China has developed rapidly, and the proportion of wind power and photovoltaic power generation in the power grid has increased year by year. Large-scale wind power and photovoltaic power generation have had a non-negligible impact on the safe and stable operation of the power system. Especially since 2010, there have been many large-scale wind turbine off-grid accidents in the "Three North" region, which have seriously affected the safe and stable operation of the power grid. In previous large-scale wind power off-grid accidents, most of the voltage dips occurred due to grid disturbances, some units w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
Inventor 邵文昌李庆樊熠贺敬张元栋张利张梅王莹莹
Owner STATE GRID CORP OF CHINA