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Method for configuration protection of extra-high voltage DC power transmission system

A technology of ultra-high voltage direct current and power transmission system, which is applied in the direction of direct current network circuit device, emergency protection circuit device, circuit device, etc., can solve the problems of inconvenient maintenance or operation of a single valve group, unable to meet the requirements of UHV power transmission reliability, etc. To achieve the effect of convenient maintenance or operation, and meet the requirements of reliability and safety

Active Publication Date: 2010-07-28
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the high-voltage valve group or the low-voltage valve group in the UHV DC transmission project can operate independently, the configuration method of conventional DC engineering protection will bring inconvenience to the maintenance or operation of the individual valve group, and cannot meet the reliability requirements of UHV transmission.

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  • Method for configuration protection of extra-high voltage DC power transmission system
  • Method for configuration protection of extra-high voltage DC power transmission system

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Embodiment Construction

[0015] The present invention can be realized by the protection cooperation of multiple microcomputers. UHV DC transmission protection layered configuration configures an independent protection host for each valve group to complete all protection functions of the valve group; another independent protection host is configured to protect the remaining poles and bipolar parts to complete the protection Function; IO unit is configured according to the valve group.

[0016] When a valve group is out of operation, you only need to operate the corresponding protection host and IO equipment to the maintenance state, and you can do any operation on the valve group without any impact on the system operation. Bipolar protection is set on the pole level without independent settings. The protection host is divided into valve groups, and the IO units are configured according to the valve groups. There are few cable connections, and the inter-station communication is at the pole layer, which...

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Abstract

The invention relates to a method for protecting configuration of an ultra high voltage direct-current power transmission system, which is used for carrying out the tiering of a serial structure of a double-twelfth pulsating valve block: namely, each double-twelfth pulsating valve block adopts a single protecting device to ensure the protective independence of a valve block layer; an electrode layer and a double electrode layer shares the same protecting device for protecting; each valve block is provided with an independent protecting host computer which can finish all protection functions of the valve block, other electrodes or double-electrode parts have independent protection host computers to finish the protection functions; an IO unit is configured according to the valve block; the double-electrode protection is arranged on the electrode layer. The invention provides the protection configuration which is suitable for the ultra high voltage direct current on the basis of the routine direct-current power transmission, and the protection is independently configured aiming at the layer protection and the electrode-layer protection, and the protection configuration of the double electrode layer is realized on the electrode layer.

Description

technical field [0001] The invention relates to a method for protection configuration of an UHV DC transmission system. More specifically, the invention combines the UHV DC double-twelve pulsation valve group series connection form, and relates to the protection of the UHV DC transmission system, which is reliable for UHV DC transmission projects. The configuration scheme of sexual requirements. Background technique [0002] At present, there are three ±800KV UHV DC transmission lines in China, namely Yunguang, Shangshang and Jinsu, which are under construction and will soon be constructed. There will be more UHV DC transmission lines included in the construction plan. The bipolar transmission capacity of these UHV DC transmission systems is 5000-7200MW. Such large-capacity power transmission places extremely high requirements on the reliability of the DC transmission system. [0003] The UHV DC transmission system is characterized by UHV DC providing 800KV DC voltage, adop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02J1/00
Inventor 卢宇张建峰李岩傅闯黎小林赵曼勇
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD