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Detection device for fault current experiment of direct-current transmission converter valve

一种检测装置、故障电流的技术，应用在直流输电换流阀检测装置领域，能够解决故障电流持续时间可调性差、故障电流冲击、高短路容量等问题，达到实现灵活性、防止短路冲击、增大安全性的效果

Active Publication Date: 2010-05-12
CHINA ELECTRIC POWER RES INST +1
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art: (1) the impact of the fault current generated in the converter valve experiment on the power system, (2) the power system needs a high short-circuit capacity to accommodate the fault current, (3) the power system provides The current peak value and duration of the fault current are poorly adjustable and inflexible

Method used

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  • Detection device for fault current experiment of direct-current transmission converter valve
  • Detection device for fault current experiment of direct-current transmission converter valve
  • Detection device for fault current experiment of direct-current transmission converter valve

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Embodiment Construction

[0016] Such as figure 1 As shown, this solution mainly includes three parts: a high-voltage and small-current loop, a low-voltage and large-current loop, and a fault current loop. The high-voltage, low-voltage, high-current, and low-current standards in each loop are all consistent with the IEC 60700-1 standard. The fault current circuit includes multiple resonant circuits. Each resonant circuit is connected in series with the high-voltage low-current circuit and the low-voltage high-current circuit with the converter valve Vt of the test sample. The fault current is provided by the resonance circuit alone, which can reduce the capacity of the test device and convert the test sample. The voltage and current required by the valve Vt are respectively composed of a high-voltage small current loop and a low-voltage large current loop, which are smaller than the total voltage and current capacity provided by a test device. An independent fault current loop can reduce the impact on the...

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Abstract

The invention relates to a detection device for a fault current experiment of a direct-current transmission converter valve, in particular to the detection device for the fault current experiment for the fault adaptive capacity of a converter valve. The detection device comprises a high-voltage low-current loop and a low-voltage high-current loop, and further comprises a fault current loop, wherein the high-voltage low-current loop, the low-voltage high-current loop and the fault current loop are respectively connected in series with a test piece converter valve Vt. According to the detectiondevice for the fault current experiment of the direct-current transmission converter valve, the test piece converter valve is heated through a high-voltage loop and a high-current loop first to reacha stable state, a required fault current is supplied by the fault current loop and the experiment is performed after a switch is turned off, so the short-circuit impact of a power system is prevented, and the flexibility and the adjustability of a fault current peak and a duration are achieved by adjusting the voltage of an energy complementing loop.

Description

Technical field [0001] The invention relates to a DC transmission converter valve detection device, in particular to a fault current experimental detection device capable of adapting to failure of the converter valve. Background technique [0002] With the gradual promotion of the application of high-voltage direct current transmission technology in power systems, the reliability of the high-voltage direct current transmission converter valve, the core component of power transmission, has become the key to the safety of the power system. The operation test of the converter valve is an important means to verify the design and manufacturing level of the converter valve for HVDC transmission and to improve its reliability. The fault current test is an important part of the operation test. Its main purpose is to verify whether the converter valve is designed to withstand the maximum current, voltage and temperature stress caused by the short-circuit current. It mainly includes the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/327
CPCG01R31/263G01R31/42G01R31/3336
Inventor 查鲲鹏高冲温家良张新刚贺之渊
Owner CHINA ELECTRIC POWER RES INST
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