Insulating configuration method for flexible direct-current transmission system of modularized multi-level transducer

A modular multi-level, flexible DC technology, applied in the direction of DC network circuit devices, AC power input into DC power output, output power conversion devices, etc., to reduce workload and improve work efficiency.

Inactive Publication Date: 2011-09-14
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the AC transmission system and the conventional DC transmission system, you can refer to the national electric power industry standard DL/T620-1997 "Overvoltage protection and insulation coordination of AC electrical installations" and the national standard GB/T311.3-2007 "Insulation coord

Method used

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  • Insulating configuration method for flexible direct-current transmission system of modularized multi-level transducer
  • Insulating configuration method for flexible direct-current transmission system of modularized multi-level transducer
  • Insulating configuration method for flexible direct-current transmission system of modularized multi-level transducer

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[0043] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] figure 1 It is the structure diagram of the modular multi-level flexible DC transmission system, figure 2 It is a block diagram of the overall flow of the present invention. The method includes system overvoltage analysis, arrester configuration and insulation coordination setting;

[0045] One: System overvoltage analysis:

[0046] For the modular multi-level flexible DC transmission system, the electromagnetic transient process is caused by various operations, faults or lightning strikes of the AC and DC transmission systems, which will generate various overvoltages on the AC and DC equipment of the converter station Stress (power frequency overvoltage, resonance overvoltage, operating overvoltage, lightning overvoltage, etc.) directly determines the configuration of the system protection device (surge arrester) and the ...

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Abstract

The utility model provides an over-voltage analysis method and an insulating configuration method for a modularized multi-level flexible direct-current transmission system. By the steps of analyzing the over-voltage of the system, arranging an arrester and matching the insulation, various over-voltage of the modularized multi-level flexible direct-current transmission system can be exactly analyzed and calculated; an arrester configuration and parameter selection scheme is searched so as to further complete the insulation matching of system equipment; furthermore, the safety of the modularized multi-level flexible direct-current transmission system during the normal run, the failure period and the period after failure can be ensured, the charge of the whole system is the minimum, and the scheme can be used for guiding related technicians to complete the insulation matching analysis on the modularized multi-level flexible direct-current transmission system at high efficiency.

Description

Technical field: [0001] The invention relates to an insulation coordination scheme for a flexible direct current transmission system of a modularized multilevel converter, in particular to an insulation coordination method for flexible direct current transmission based on a modularized multilevel converter. Background technique: [0002] The insulation coordination of the power system is to comprehensively consider the various acting voltages (including working voltage and overvoltage) that electrical equipment withstands under all possible working conditions in the system, the characteristics of protection devices and the withstand characteristics of equipment insulation to various working voltages. , in order to choose the optimal configuration of protection devices and the insulation level of the equipment, so that the overall equipment cost, maintenance costs and failure losses caused by equipment insulation failures can achieve the highest overall economic and safe opera...

Claims

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Application Information

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IPC IPC(8): H02J1/00H02J3/36
CPCY02E60/60H02J3/36H02M2007/4835H02M7/4835
Inventor 贺之渊马巍巍赵岩孔明王姗姗
Owner CHINA ELECTRIC POWER RES INST
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