Converter Valve Test Control System Dynamic Triggering
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Solution Overview
Problem
Current high voltage direct current transmission converter valve test equipment lacks flexibility in triggering timing and phase, leading to potential abnormal faults and complex protection logic, which reduces reliability and increases equipment damage during operation tests.
Innovation Solution
A control and protection system that includes human-machine interface, synchronization, signal acquisition, data aggregation, conditioning, protecting, and waveform recording elements, communicating through CAN buses to dynamically adjust converter valve triggering timing and phase, and separates abnormal conditions into three ranks for simplified protection strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed timing control is used for converter valve triggering, then the control system is simple, but the adaptability to different operation conditions is poor
Solution Approach 1:
The control system dynamically adjusts the triggering timing and phase of converter valves based on real-time operation conditions. The triggering time is no longer fixed but can be flexibly modified according to different test requirements, allowing the system to adapt to various operation conditions while maintaining a relatively simple control architecture through standardized adjustment mechanisms.
2Reliability
If complex protection logic with multiple priority levels is implemented, then comprehensive protection coverage is achieved, but system reliability decreases
Solution Approach 1:
The protection logic is segmented into three distinct ranks based on abnormal condition severity: common abnormal, hazardous abnormal, and emergency abnormal. Each rank has dedicated protection measures and response strategies, simplifying the overall protection logic while ensuring comprehensive coverage. This segmentation reduces the complexity of decision-making in protection systems and improves reliability by providing clear, unambiguous response protocols for each type of abnormal condition.
3Adaptability or versatility
If fixed triggering number and phase are used during test period, then the control logic is simple, but the flexibility for different test requirements is limited
Solution Approach 1:
The triggering parameters including triggering number and phase are changed dynamically during the test period based on specific test requirements. The control system allows modification of these parameters without requiring complex reconfiguration, maintaining ease of operation while providing the flexibility needed for different test scenarios through standardized parameter adjustment capabilities.
Data Source
AI summary
This present provides a control and protection equipment system suitable for synthesis converter operation test, relates to power system automation equipment field. This system includes human-machine interface element, synchronization element, signal acquisition element, data aggregation element, conditioning element, protecting element, wave form recording element, wave form monitor element, on-off input element, on-off output element, vale based element (VBE), high direct current supply power system controller, high voltage supply system controller, current surge circuit controller, impulse circuit controller, test converter valve water cooling controller and test equipment water cooling system controller. This system can control converter samples and auxiliary valves on set trigging timing, produce various operation tests need heat, voltage and current of the converter samples and carry through operation tests. This system can also monitor on-off condition and important analog parameters condition of main circuit immediately, when abnormal condition takes place, the suitable protective measures will be made immediately.