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Test method for eliminating effluence of DC engineering grounding electrode electric current on alternating-current system

A DC system, DC current technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc.

Active Publication Date: 2008-12-31
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ingenious in the experimental research on the complex technical problem of the influence of ground electrodes on AC systems in DC transmission projects

Method used

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  • Test method for eliminating effluence of DC engineering grounding electrode electric current on alternating-current system
  • Test method for eliminating effluence of DC engineering grounding electrode electric current on alternating-current system
  • Test method for eliminating effluence of DC engineering grounding electrode electric current on alternating-current system

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1: Sanguang DC pole I single pole ground loop heavy load test

[0033] During the system commissioning of the Three Gorges to Guangdong DC transmission project, according to the arrangement of the system commissioning plan, a large load test under the pole I single pole ground circuit was carried out. Considering the impact of the grounding current on the operation of the AC transformer near the receiving end under the operation mode of the single pole ground return line, especially the impact on the operation of the main transformers of the Daya Bay Nuclear Power Station and Ling'ao Nuclear Power Station, it was decided to use the Tianguang DC bipolar unbalanced method Operation to compensate for the impact of the grounding current of the Sanguang DC single-pole grounding pole on the operation of the nuclear power main transformer. The specific test plan is formulated as follows:

[0034] 1. Before the test, Tianguang DC was operated according to the load leve...

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Abstract

The invention relates to a method for eliminating the impacts of the current of a direct current engineering grounding pole on an alternating current system, which utilizes another direct current engineering bipolar imbalance operation mode to generate the grounding current of the reverse grounding pole, thereby compensating the impacts of the grounding current of the grounding pole with the direct current single polar ground operation mode on the operation of the alternating current system. The method has originality in the pilot research aspect of a complicated technical problem of the impacts of the direct current power transmission engineering grounding pole on the alternating system, the obtained test result and the test data can be used as the important basis for compiling the dispatching operation mode of a power network.

Description

technical field [0001] The invention relates to a test method for eliminating the influence of a DC engineering grounding electrode current on an AC system, and belongs to the field of high-voltage DC transmission (HVDC). Background technique [0002] Generally speaking, there are three operation modes of HVDC transmission system, bipolar operation mode, unipolar earth return line operation mode and unipolar metal return line operation mode. When the single-pole ground return line of the DC transmission system is running, there is a DC potential near the ground electrode of the converter station of the transmission system, which is determined by the magnitude of the injected current and the soil resistivity there. When the DC system operates in the ground return mode, the injection current is the DC transmission current, and the higher the soil resistivity, the higher the potential and the wider the range of influence. The high potential of the DC grounding electrode also a...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 印永华刘泽洪杨万开王明新曾南超余军蒋卫平朱艺颖
Owner CHINA ELECTRIC POWER RES INST
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