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Voltage drop suppression device of start process of flexible direct current power transmission project

A technology of flexible DC transmission and start-up process, which is applied in the field of power transmission and transformation, and can solve problems such as wind turbine off-grid, 110kV AC grid voltage fluctuations, affecting the safe and stable operation of wind turbines, etc., achieving good control effects and reducing workload

Pending Publication Date: 2018-09-11
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0006] We need to know that the Nan'ao multi-terminal flexible direct current transmission project is to transmit the wind energy on Nan'ao Island to the mainland for use by the load center. Now, the start-up process not only causes voltage fluctuations of the relevant 110kV AC grid, but also causes wind turbines to go off-grid, affecting the safety and stability of the wind turbines. run

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  • Voltage drop suppression device of start process of flexible direct current power transmission project

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[0025] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

[0026] like figure 1 As shown, a voltage drop suppression device during the start-up process of a flexible direct current transmission project includes a main control system and a wave recording storage system. The circuit of the main control system includes a sampling circuit, a switching value detection circuit, a processor, a gate board, Opening and closing device, three-phase lin...

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Abstract

The invention relates to the technical field of power transmission and transformation, and more specifically relates to a voltage drop suppression device of a start process of a flexible direct current power transmission project. The device comprises a main control system and a recording storage system, circuits of the main system comprise a sampling circuit, a switch quantity detection circuit, aprocessor, a gating plate, a switch-on and switch-off device, a three-phase linkage operation breaker and a host computer, the sampling circuit and the switch quantity detection circuit are separately connected with the processor, the processor, the gating plate and the switch-on and switch-off device are separately connected with the recording storage system, the three-phase linkage operation breaker is connected with the switch-on and switch-off device, and the host computer is connected with the recording storage system. According to the device, motion and alarm of a control protection device of a flexible direct current power transmission system are prevented in a voltage fluctuation suppression process.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation, and more specifically, to a voltage drop suppression device during the start-up process of a flexible DC power transmission project. Background technique [0002] The Nan'ao multi-terminal flexible DC transmission project, which was put into operation on December 25, 2013, is the first multi-terminal flexible DC transmission system in China. Nan'ao multi-terminal flexible DC transmission project consists of three converter stations: ±160kV Plastic City Converter Station, ±160kV Jinniu Converter Station and ±160kV Qing'ao Converter Station, of which ±160kV Jinniu Converter Station and ±160kV Qing'ao Converter Station The flow station is located on Nan'ao Island (Nan'ao Island has clean energy - wind energy), and the ±160kV plastic city converter station is located on the mainland of Shantou. The project is to rectify the AC power from the wind power energy on Nan'ao ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12H02J3/36
CPCH02J3/12H02J3/36H02J2003/365Y02E60/60
Inventor 李洁吴建武黄凯漩吴子帆金晶赵嘉关永勋林冬伟佘佳林林嘉洪陈佳郑植榕郑翔崔畅胡景桐王彦人
Owner GUANGDONG POWER GRID CO LTD
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