Converter valve base electronic equipment missing pulse protection and control methods and systems

A technology of valve-based electronic equipment and control methods, applied in the direction of DC network circuit devices, electrical components, circuit devices, etc., can solve problems such as overvoltage and overcurrent of HVDC converter valves, and achieve high safety, stable and reliable operation sex high effect

Active Publication Date: 2011-04-13
CHINA ELECTRIC POWER RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

The invention proposes a safety protection strategy for valve-based electronic equipment to trigger timing sequence lost pulses, and proposes an innovative pulse loss processing flow, which solves safety hazards such as overvoltage and overcurrent of HVDC converter valves caused by lost pulses

Method used

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  • Converter valve base electronic equipment missing pulse protection and control methods and systems
  • Converter valve base electronic equipment missing pulse protection and control methods and systems
  • Converter valve base electronic equipment missing pulse protection and control methods and systems

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Embodiment Construction

[0015] When the control and protection system (CCP) loses the trigger pulse of one or more valves, the pulse sent by the interface device between VBE and CCP to VBE is only 3 or less trigger pulse serial trigger words. This is the pulse loss phenomenon.

[0016] The VBE's original processing strategy for pulse loss is to switch systems quickly, that is, when a trigger pulse loss is detected, the VBE sends a system switching request signal to the CCP. In one cycle (20ms), the conduction angle of each thyristor stage of the 12 bridge arms is 30 degrees, and the conduction time is about 1.67ms. After VBE receives the serial trigger word with only three trigger pulses, it will immediately detect that the trigger word is incorrect, and send a channel switching request (VBE Fail) signal to CCP, and the channel switching will be completed within 6-7ms. If the system is normal, Then the switch is successful, and the VBE master channel is switched to the slave channel. If the slave s...

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Abstract

The invention belongs to the field of high-voltage direct current (HVDC) transmission and relates to converter valve base electronic equipment missing pulse protection and control methods and converter valve base electronic equipment missing pulse protection and control systems. The invention provides a triggering time sequence missing pulse safety protection policy based on valve base electronic equipment, provides a missing pulse processing flow and solves the safety hazards of HVDC converter valve overvoltage and overcurrent and the like caused by missing pulse. The methods and systems operate stably, are high in reliability and safety, and effectively avoids overvoltage, overcurrent and the like caused by missing pulse to the HVDC converter valve.

Description

technical field [0001] The invention belongs to the field of high-voltage direct current transmission (HVDC), and relates to a pulse loss protection and control method and system for valve base electronic equipment of a converter valve. Background technique [0002] In high-voltage direct current transmission, the extreme control system of the converter station, the electronic equipment of the valve base of the converter valve and the gate unit of the thyristor level constitute the entire secondary monitoring system of the converter valve. The gate unit monitors the first-level thyristor, and reports the operating status of the thyristor level of the valve-based electronic equipment in real time. The valve-based electronic equipment summarizes the information of all gate units, and reports to the pole control system after comprehensive judgment. At the same time, the valve-based electronic equipment receives the command of the pole control system and sends a control command...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00
Inventor 周亮郝长城汤广福蓝元良
Owner CHINA ELECTRIC POWER RES INST
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