HVDC Breaker with Adaptive Section Segmentation
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Solution Overview
Problem
High Voltage Direct Current (HVDC) breakers face challenges in efficiently breaking HVDC currents during normal operation and line fault situations, as existing technologies struggle to balance fast breaking operations with minimal system disturbances and voltage transients.
Innovation Solution
The implementation of a sectionalized HVDC breaker system with individually controllable sections and a control apparatus that determines the number of sections to trip based on operational events, allowing for adaptive breaking capability and redundant sections to ensure efficient operation even in faulty conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all HVDC breaker sections are tripped simultaneously, then the breaking capability is maximized for fault situations, but the system disturbances and voltage transients increase unnecessarily for normal operations
Solution Approach 1:
The HVDC breaker is divided into multiple independently controllable breaker sections. The control apparatus can selectively trip individual sections or groups of sections based on the operational event type, rather than tripping all sections simultaneously. This segmentation allows the breaking capability to be adapted to the specific demands of each operational event, maximizing reliability when needed while minimizing disturbances during normal operations.
2Reliability
If the HVDC breaker is designed with fixed breaking capability for worst-case scenarios, then reliability is ensured, but the system experiences unnecessary disturbances during normal operations
Solution Approach 1:
The HVDC breaker system transitions from a static, fixed-breaking-capability design to a dynamic, adaptive design. The control apparatus dynamically determines the number of breaker sections to trip based on the type of operational event detected. This dynamic adaptation ensures reliable breaking operation for worst-case scenarios while maintaining smooth system operation during normal conditions, as only the necessary number of sections are tripped.
3Reliability
If redundant HVDC breaker sections are added, then the reliability of breaking operation is ensured under faulty conditions, but the device complexity increases
Solution Approach 1:
The HVDC breaker is segmented into multiple independently controllable sections, with at least one redundant section. The control apparatus intelligently manages these sections by selectively tripping only the necessary number based on operational events and section status. This segmentation approach ensures reliable breaking operation under faulty conditions while minimizing the overall device complexity, as the redundant sections are integrated into the existing segmented structure rather than adding entirely separate systems.
Data Source
AI summary
The invention relates to an HVDC breaker (300) comprising at least two individually controllable HVDC breaker sections (305) connected in series, wherein the HVDC breaker is arranged in a manner so that the number of HVDC breaker sections tripped upon tripping of the HVDC breaker depends on the operational event in response to which the tripping occurs. The invention further relates to a control apparatus (400) for controlling the HVDC breaker, as well as to a method of breaking an HVDC line. The method comprises receiving (500) a system status signal indicative of an operational event requiring the breaking of the HVDC line, and determining (505) the number of HVDC breaker sections required for the breaking.