A thyristor junction temperature online monitoring device

A technology of monitoring devices and thyristors, which is applied in the direction of measuring devices, electrical devices, thermometers, etc., can solve problems such as unrealistic

Active Publication Date: 2020-04-24
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The direct measurement method is to directly measure the junction temperature of the thyristor with an infrared thermometer. However, due to the highly integrated and compact structure of the thyristor in the converter valve, the operator can only conduct remote monitoring by patrolling the corridor. Due to problems such as angles, it is impossible to achieve comprehensive 24 / 7 accurate junction temperature monitoring

Method used

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  • A thyristor junction temperature online monitoring device
  • A thyristor junction temperature online monitoring device
  • A thyristor junction temperature online monitoring device

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] The invention provides an on-line monitoring device for thyristor junction temperature, such as figure 1 As shown, the device includes a control and protection system, an on-site operating system, a background system, a water cooling system, and an intelligent monitoring and control cabinet; the control and protection system, on-site operating system, and the background system are all connected to the intelligent monitoring and control cabinet through a communication bus, The water-cooling system is connected to the intelligent monitoring and control chassis through an optical fiber;

[0037] The control and protection system provides the terminal voltage U(t) of the thyristor and the current I(t) flowing through the thyristor to the intelligent monitoring and control cabinet, and simultaneously receives the junction temperature T of the thyristor from...

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Abstract

The invention provides an online monitoring device for thyristor junction temperature which comprises a control protection system, a local operating system, a background system, a water cooling system and an intelligent monitoring and controlling machine cabin. The control protection system, the local operating system, and the background system are connected with the intelligent monitoring and controlling machine cabin through communication buses; and the water cooling system is connected with the intelligent monitoring and controlling machine cabin through optical fibers. The online monitoring device for thyristor junction temperature of the invention is capable of performing online monitoring of all thyristors inside a high voltage direct current converter valve body more accurately in real time so as to obtain the real time data for the overheat protections of the high voltage direct current converter valve and to increase the operational reliability of a high voltage direct current power transmission system.

Description

technical field [0001] The invention relates to a monitoring device, in particular to an online monitoring device for thyristor junction temperature. Background technique [0002] The thyristor junction temperature refers to the operating temperature of the PN junction in the thyristor. Whether under normal or overload conditions, the junction temperature of the thyristor cannot exceed its maximum junction temperature, otherwise the thyristor will be misconducted without a gate trigger signal, or the PN junction of the thyristor will fail due to overheating. recovery from thermal breakdown. Thyristor is the core component of high-voltage direct current transmission (HVDC) converter valve to realize its own functions. Its main electrical parameters, such as forward withstand voltage, reverse withstand voltage, and reverse recovery charge, are directly related to the junction temperature of thyristor. The quality of operation directly affects the stability and reliability of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 王华锋郝长城张海峰宋林伟张见王雅洁
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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