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Insulation coordination rapid optimizing algorithm for extra-high voltage DC transmission system

A technology of UHV DC and insulation coordination, which is applied in the direction of DC network circuit devices, measuring electricity, electrical components, etc., and can solve problems such as large amount of calculation

Inactive Publication Date: 2009-07-01
国网直流工程建设有限公司
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  • Description
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Problems solved by technology

Although this method is accurate in calculation, it must be calculated for different projects. There are many types of faults to be calculated, and the amount of calculation is very large.

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  • Insulation coordination rapid optimizing algorithm for extra-high voltage DC transmission system

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Embodiment Construction

[0007] Based on the characteristic curve look-up table method, it is divided into the following steps:

[0008] (1) According to the configuration scheme and position of the arrester, and referring to the previous design experience, determine the design matching current and maximum passing energy of each arrester.

[0009] (2) Determine the nominal voltage and reference voltage of the single-column arrester according to the parameters related to the system voltage.

[0010] (3) According to the maximum passing energy of the arrester, refer to the energy parameters of the single-post arrester to determine the total number of arresters.

[0011] (4) Utilize the coordination current 3 and the total number of columns of the arrester to obtain the actual maximum passing current of each arrester; find the characteristic curve of the arrester, as shown in Figure 1, and obtain the per-unit value 4 of the corresponding protection voltage; use the nominal voltage, Converted to the real...

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Abstract

An insulation matching fast optimization algorithm of an ultra-high voltage DC transmission system utilizes the matching current and the total energy of an arrester, which are obtained through over-voltage calculation or empirical data, looks up a table according to a characteristic curve of the arrester correspondingly, obtains the protection level of the arrester and the insulation level of the equipment, and rapidly carries out the optimization design of the insulation matching.

Description

technical field [0001] The invention relates to a fast optimization algorithm for insulation coordination of a UHV direct current transmission system, and more specifically relates to a fast table look-up algorithm for insulation coordination of a DC converter station. Background technique [0002] The insulation coordination design of DC converter stations is one of the key technologies in the design and implementation of DC UHV transmission projects. The protection level of arresters and the insulation level of equipment are directly related to the design, manufacture, cost and other aspects of equipment. The basic principle of insulation coordination in the converter station is: the overvoltage on the AC side should be protected by the arrester installed on the AC side as much as possible; the overvoltage on the DC side should be limited by the combination of arresters installed on the DC side of the converter transformer; The key components should be directly protected ...

Claims

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Application Information

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IPC IPC(8): H02J1/00G01R31/12G01R31/20
Inventor 常浩马为民郑劲聂定珍张燕秉袁智勇
Owner 国网直流工程建设有限公司