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Maintenance method for flexible direct current converter valve cooling system

A technology of cooling system and converter valve, which is applied in the direction of measuring devices and instruments, can solve problems such as short commissioning time, reduced utilization efficiency of converter stations, tripping and outage of converter stations, etc., and achieves the effect of saving maintenance resources

Pending Publication Date: 2022-07-12
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the cooling system of the converter valve works under the conditions of high pressure, high temperature and strong electromagnetic interference, the tripping and outage of the converter station often occurs due to the failure of the cooling system
For example, in 2009, due to the water-cooling equipment manufacturer's valve cooling system leakage protection setting inappropriate for pole I of the back-to-back converter station in Gaoling and not being discovered in time, when the change in the ambient temperature caused the liquid level of the expansion tank to change beyond the fixed value, The valve leakage protection malfunctioned, causing stage I to be blocked; in 2012, the high-end valve group of pole II in the Suidong converter station tripped due to low internal cooling water flow, and after the inspection, it was found that the malfunction was caused by the failure of the flow sensor; in 2019, the Yichang converter station There are impurity particles in the main filter that cause blockage, and the alarm is abnormal due to the high pressure of the differential pressure gauge of the main filter
[0003] Flexible DC transmission technology has only been developed for about ten years in my country. The existing flexible DC projects have been put into operation for a short period of time, lacking long-term operation data accumulation and experience summary. The existing converter valve cooling system still adopts the traditional Regular inspection and maintenance methods cannot meet the needs of the normal operation of the system. On the one hand, it will cause waste of inspection manpower and inspection resources, as well as frequent system outages; The cooling system failure cannot be detected and dealt with in time, which reduces the utilization efficiency of the converter station

Method used

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  • Maintenance method for flexible direct current converter valve cooling system
  • Maintenance method for flexible direct current converter valve cooling system
  • Maintenance method for flexible direct current converter valve cooling system

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Embodiment Construction

[0039] The following will refer to the appendix figure 1 Specific embodiments of the present disclosure are described in detail. While specific embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

[0040] It should be noted that certain terms are used in the description and claims to refer to specific components. It should be understood by those skilled in the art that the same component may be referred to by different nouns. The present specification and claims do not take the difference in terms as a way to distinguish components, but take the difference in function of the components as a criterion for distinguishing. As ref...

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Abstract

The invention discloses a maintenance method for a flexible direct current converter valve cooling system. The maintenance method comprises the following steps: acquiring actual operation state information of each device in the flexible direct current converter valve cooling system; standard state information is compared with the actual operation state information of all the devices to detect and score the operation states of all the devices of the flexible direct current converter valve cooling system, and the standard state information comprises the operation age limit, the operation state quantity value, the operation state quantity attention value, the operation state quantity early warning value and the fault outage rate of the devices; inputting the operation state score of each device and a preset weight into a state evaluation model of the flexible direct current converter valve cooling system so as to detect and score the operation state of the flexible direct current converter valve cooling system; and selecting different maintenance methods according to the score of the running state of the flexible direct current converter valve cooling system.

Description

technical field [0001] The present disclosure belongs to the field of power system equipment detection, and in particular relates to a maintenance method for a cooling system of a flexible DC converter valve. Background technique [0002] The flexible HVDC converter valve will generate a lot of heat during long-term operation. If the converter valve is overheated beyond its capacity, it will cause damage and have a serious impact on the flexible HVDC transmission system. Therefore, a cooling system is required to make the flexible HVDC converter valve Maintain the normal working temperature range to ensure the normal and stable operation of the converter valve. Since the cooling system of the converter valve works under the conditions of high pressure, high temperature and strong electromagnetic interference, the trip of the converter station due to the failure of the cooling system often occurs. For example, in 2009, the leakage protection value of the valve cooling system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02Y02E60/60
Inventor 刘轩东梁帆季一润袁茜赵媛槐青高静
Owner XI AN JIAOTONG UNIV
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