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In-loop inter-tripping related function test method and system of one-tower two-loop DC engineering

A technology of DC engineering and related functions, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve problems such as the influence of oil and gas pipelines and AC transformers, endanger the safe operation of oil and gas pipelines and AC transformers, etc., and achieve the effect of reducing the current into the ground.

Active Publication Date: 2016-05-25
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term high current into the ground will affect the oil and gas pipelines and AC transformers near the DC system, endangering the safe operation of oil and gas pipelines and AC transformers

Method used

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  • In-loop inter-tripping related function test method and system of one-tower two-loop DC engineering
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  • In-loop inter-tripping related function test method and system of one-tower two-loop DC engineering

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] Although the steps in the present invention are arranged with labels, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted.

[0022] In one embodiment, the method for testing and researching related functions of the double-circuit DC project on the same tower, such as figure 1 shown, including the following steps:

[0023] Step S101: According to the received command of abnormal blocking and tripping of one pole and returning to the other pole, add the function of abnormal blocking and tripping of one pole to the other pole in the DC pole control system, and according to the received optimized gro...

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Abstract

The invention discloses an in-loop inter-tripping related function test method and system of one-tower two-loop DC engineering. The method comprises that according to a command that the other pole in the loop is inter-tripped to when one pole is closed abnormally, a function of inter-tripping to the other pole in the loop during abnormal closing of one pole is added to a DC pole control system, and according to a grounding pole overcurrent protection optimizing command, a grounding pole overcurrent protection optimizing function is added to a DC protection system; whether the inter-tripping function is used is tested; if the inter-tripping function is used, motion condition of the inter-tripping function is tested, and otherwise, motion condition of the grounding pole overcurrent protection optimizing function is tested; and if motion of the inter-tripping function or the grounding pole overcurrent protection optimizing function is correct, test is ended, and otherwise the step in which the inter-tripping function and the grounding pole overcurrent protection optimizing function are added is returned to. When the DC transmission engineering operates in the single-pole ground loop manner, the method and system of the invention can be used to rapidly reduce the grounding current of the grounding pole, and prevents heavy grounding current from influencing safe operation of oil and gas pipelines, AC transformers and the like in the surrounding of the DC system.

Description

technical field [0001] The invention relates to the technical field of direct current transmission, and in particular to a method and system for testing and researching related functions of double circuit direct current projects on the same tower. Background technique [0002] The ground electrode is an important part of the DC transmission project. Under normal working conditions, the DC system operates with a double-pole return line, and the earth is used as the current return path through the ground electrode. If a single-pole blockage occurs in the DC system, the remaining pole will operate in the form of a single-pole ground return line, and at this time, a strong DC current will be injected into the ground through the grounding pole. For the double-circuit DC power transmission project on the same tower, if the bipolar blockage of the same-named pole occurs, the current flowing into the ground will double. The long-term large current into the ground will affect the oi...

Claims

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Application Information

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IPC IPC(8): G01R31/00H02H7/26
Inventor 朱益华郭琦李书勇关红兵梅勇朱韬析
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD