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Method for making high-voltage side group valve put into operation and go out of operation

A technology that is put into operation, high-voltage side, applied in the direction of DC network circuit devices, electrical components, circuit devices, etc., can solve the problems of low safety, fluctuation of DC operating parameters, low stability, etc., to improve reliability and availability, Ease of engineering

Inactive Publication Date: 2013-12-11
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for putting in and out of operation of the high-voltage side valve group, so as to solve the problem that in the existing UHV DC transmission system, the input / exit mode of the high-voltage side valve group of the 12-pulse converter is likely to cause large fluctuations in DC operating parameters. Volatility, low security, and low stability

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  • Method for making high-voltage side group valve put into operation and go out of operation
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  • Method for making high-voltage side group valve put into operation and go out of operation

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[0030] In order to make the object, 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 and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] In the case of bad weather or reduced insulation level of equipment, conventional EHV can realize step-down operation mode by reducing the voltage setting value. As for the connection mode of UHV two 12-pulse valve groups connected in series, it is possible to realize step-down and safe operation by withdrawing from the corresponding high-voltage side valve groups on the rectification side and inverter side, that is, the 3 / 4 operation mode. Such as figure 1 As shown, the 3 / 4 operation mode can improve the reliability and availability of UHV, and the 3 / 4 operation mode must involve the input...

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Abstract

The invention relates to a direct current transmission system, in particular to a method for making a high-voltage side group valve put into operation and go out of operation, wherein the method meets the requirements for transmission reliability and availability rate of an ultra high voltage direct current transmission project. The method for making the high-voltage side group valve put into operation includes the following steps that after an ultra high voltage direct current transmission system receives an instruction of putting into operation, a rectifying side is unlocked in advance of an inverting side; after receiving the unlocking instruction, a pole control system of the rectifying side immediately sends out an instruction for separating a high-speed bypass switch; next, the contact separating process of the high-speed bypass switch and the like are performed. The method the control sequence logistic of achieving operation of a low-voltage side group valve in series-connection group valves of the ultra high voltage direct current transmission project and making the high-voltage side group valve put into operation / go out of operation, the sequential control logistic is clear and facilitates project achievement, the actual requirements of the ultra high voltage direct current transmission project are met, and meanwhile the reliability and the availability rate of the ultra high voltage direct current transmission system can be improved.

Description

technical field [0001] The invention relates to a direct current transmission system, in particular to a method for putting a high-voltage side valve group into and out of operation that satisfies the transmission reliability and availability requirements of an ultra-high voltage direct current transmission project. Background technique [0002] Compared with traditional high-voltage DC transmission, UHV DC transmission has higher voltage level, longer transmission distance, larger transmission capacity, smaller line loss, less land occupation and improved operation economy. Due to the increase of the voltage level, new requirements are put forward for the related electrical equipment manufacturing process and the external insulation characteristics of the equipment. In order to meet the new requirements, two 12-pulse valve groups are connected in series for each pole of the UHV DC system, and a bypass circuit breaker and an isolation switch are added. Therefore, the operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02J3/36
CPCY02E60/60
Inventor 魏巍汤凡史华勃丁理杰滕予非张华
Owner STATE GRID CORP OF CHINA
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