Method and device for eliminating influence of compensator on line distance protection

A technology of distance protection and line protection, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as the influence of the protection function of line protection equipment

Active Publication Date: 2017-08-18
NR ELECTRIC CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the embodiment of the present invention expects to provide a method and device for eliminating the influence of the compensator on the line distance protection, which solves the problem that the prior art h

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  • Method and device for eliminating influence of compensator on line distance protection
  • Method and device for eliminating influence of compensator on line distance protection
  • Method and device for eliminating influence of compensator on line distance protection

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Embodiment Construction

[0090] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0091] The embodiment of the present invention provides a method for eliminating the influence of the compensator on line distance protection, refer to figure 1 As shown, the method includes the following steps:

[0092] Step 101. Obtain the current of the line connected to the compensator or the current of the series converter in the compensator.

[0093] Among them, the compensator is used to control the current of the line connected to the compensator, and the compensator includes a static synchronous series compensator, a unified power flow controller, an inter-line power flow controller and a convertible static compensator.

[0094] Specifically, step 101 of obtaining the current of the line connected to the compensator or the series converter in the compensator can be i...

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Abstract

The embodiment of the invention discloses a method for eliminating influence of a compensator on line distance protection. The method comprises the steps of obtaining a current of a series converter in the compensator or a line accessed by the compensator, and when the current is greater than a preset current threshold value and first duration time is greater than a first preset time threshold value, carrying out logout by the serial converter or a series transformer; or when the current does not satisfies the above-mentioned demand, obtaining a voltage of a busbar accessed by the compensator or the line accessed by the compensator, and when the voltage is smaller than or equal to a preset voltage threshold value and second duration time is greater than a second preset time threshold value, carrying out logout by the series converter and the series transformer. The embodiment of the invention also discloses a device for eliminating the influence of the compensator on the line distance protection.

Description

technical field [0001] The invention relates to a technology for eliminating the influence of power electronic equipment on distance protection lines in the field of power systems, in particular to a method and device for eliminating the influence of compensators on line distance protection. Background technique [0002] With the rapid development of the interconnection technology of the power system, the power system for long-distance transmission has been widely used. During the operation of a long-distance power system, it is easily affected by factors such as the environment and load demand, and system oscillations occur, resulting in problems such as system stability control performance, AC-DC hybrid grid coordination, and power flow control capabilities. In the prior art, static synchronous series compensator (Static Synchronous Series Compensator, SSSC), unified power flow controller (Unified Power Flow Controller, UPFC) and interline power flow controller (InterlineP...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/262H02H7/263
Inventor 潘磊田杰董云龙卢宇黄如海姜崇学鲁江张宝顺邱德锋谢华
Owner NR ELECTRIC CO LTD
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