Flexible DC starting loop differential protection test method based on phase compensation

A start-up circuit and differential protection technology, which is applied in the direction of electronic protection circuit testing, electronic circuit test, etc., can solve the problem that the start-up circuit differential protection cannot be carried out on-site in the converter station, and achieve the effect of improving safety and reliability

Active Publication Date: 2018-10-12
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
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Problems solved by technology

At present, the domestic research on this technology and equipment is still in a blank stage. Therefore, the logical maintenance work of the differential protect

Method used

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  • Flexible DC starting loop differential protection test method based on phase compensation
  • Flexible DC starting loop differential protection test method based on phase compensation
  • Flexible DC starting loop differential protection test method based on phase compensation

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a flexible DC starting loop differential protection test method based on phase compensation. According to the method, when transmission of an AC analog voltage and current signal and a digital FT3 message voltage and current signal is synchronously controlled through the upper computer software, the actual transmission time difference T of the two signals is calculated every second and synchronization of the two signals is realized by using the method of phase compensation on the analog control signal so that synchronous output of the AC analog voltage and current signal and the high-speed digital FT3 voltage and current signal can be realized, and a new method can be provided for the timing maintenance work of the starting loop differential protection logic scene of the flexible DC control protection device.

Description

technical field [0001] The invention relates to the field of testing control and protection devices of flexible DC converter stations, in particular to a testing method for differential protection of flexible DC start-up circuits based on phase compensation. Background technique [0002] With the development of power electronic device technology, flexible direct current transmission has entered the practical application stage from the theoretical stage. In China, power grid companies represented by China Southern Power Grid Corporation built the world's first multi-terminal flexible DC transmission demonstration project in 2013 - Nan'ao ±160kV multi-terminal flexible DC transmission project. The most important link technology of flexible DC power transmission is the construction of AC-DC conversion, that is, the converter station, and the control core of the converter station is the flexible DC control and protection device. The flexible DC control and protection device mai...

Claims

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Application Information

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IPC IPC(8): G01R31/28
CPCG01R31/2827
Inventor 董华梁王东鹏樊道庆陈涛林坚林峰张板王之纯郭俊波陈文旭郜学思蔡思雨陈培炜吴亮曾建兴邱栋罗滨许树楷陈锐王红星王文芳郑绍鸿李盛鸿黄斌林捷赵小宾邱理平向前陈罗飞
Owner GUANGDONG POWER GRID CO LTD
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