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System and method for detecting reliability of converter valve cooling control device

A technology for cooling control and converter valve, applied in the field of converter valve cooling, can solve the problems such as the measurement accuracy of triple sensor is out of tolerance, the reliability of the refusal and malfunction control device is reduced, and the response speed of the control hardware is slow.

Active Publication Date: 2015-01-21
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cooling system of the converter valve has been operating in a high-voltage environment for a long time, and gradually exposed the slow response speed of the control hardware due to the aging of the electrical components, the delay of the main equipment drive, the poor consistency of the redundant input signal, the measurement accuracy of the triple sensor is out of tolerance, and the failure to operate and misoperation occur from time to time, and the reliability of the control device decreases as a whole. Therefore, in the high-voltage direct current transmission project, it is very necessary to invent a reliability detection system applied to the pure water cooling control device of the converter valve.

Method used

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  • System and method for detecting reliability of converter valve cooling control device
  • System and method for detecting reliability of converter valve cooling control device
  • System and method for detecting reliability of converter valve cooling control device

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Embodiment

[0110] Please refer to figure 1 As shown, this embodiment discloses a reliability detection system for a converter valve cooling control device, which mainly includes a state signal monitoring device 2 of the device under test, a control response monitoring device 3 of the device under test, a sensor fault monitoring device 4 of the device under test, The key control component failure monitoring device 5 under test, the clock synchronization device 6, the central control and processing device 7, the industrial Ethernet communication device 8, and the reliability detection and analysis background 9 are composed. Among them: the state signal monitoring device 2 of the equipment under test is used to monitor the state signal of the converter valve cooling control device 1, so as to obtain the consistency detection information of the redundant signal under test, and the redundant signal at least includes the operation of the equipment under test , stop, fault, alarm and trip signa...

example 52

[0328] Based on example 5.2, after 1 CPU module, 1 main pump contactor failure PKM, 1 Fl flow sensor and other 3 control components fail, in addition to affecting the system availability, it will also affect the consistency rate, fast rate and stability rate of the system After calculation, the consistent rate Cj=0.9599, the fast rate Rk=0.9875, the stable rate Sm=0.8001, and the available rate Qn=0.93462185, then

[0329] Pi=i1×Cj+i2×Rk+i3×Sm+i4×Qn=0.9165, which is close to 0.9. According to engineering experience, the reliability of this system has dropped greatly and requires power-off maintenance.

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Abstract

The invention discloses a system for detecting the reliability of a converter valve cooling control device. The system comprises a detected device state signal monitoring device, a detected device control response monitoring device, a detected instrument sensor fault monitoring device, a detected key control element failure monitoring device, a central control and processing device, an industrial Ethernet communication device and a reliability detecting and analyzing background. Meanwhile, the invention further discloses a method for detecting the reliability through the system. The method includes the steps of collecting detection information, setting up a mathematic model, automatically calculating the concordance rate Cj, the speed rate Rk, the stability rate Sm and the availability rate Qn of detected redundant signals, and calculating the reliability Pi of the converter valve cooling control device according to the weight. The system has the advantages of being small in size and high in set-up speed, universality, reliability and the like, and safe and stable running of the converter valve cooling control device is ensured.

Description

technical field [0001] The invention relates to the technical field of converter valve cooling, in particular to a reliability detection system and method for a converter valve cooling control device. Background technique [0002] The converter valve cooling system is a necessary auxiliary system for HVDC power transmission projects, and the converter valve cooling control device is an effective guarantee for reliable control and stable operation of the converter valve cooling system. The cooling system of the converter valve has been operating in a high-voltage environment for a long time, and gradually exposed the slow response speed of the control hardware due to the aging of the electrical components, the delay of the main equipment drive, the poor consistency of the redundant input signal, the measurement accuracy of the triple sensor is out of tolerance, and the failure to operate And malfunctions occur from time to time, and the reliability of the control device decre...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0254
Inventor 崔鹏飞钱海卢志良彭德辉
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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