Fast Bus Transfer Device for Power Supply Continuity
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Solution Overview
Problem
Users face difficulties in determining proper parameters for fast bus transfer modes due to complex residual voltage characteristics, leading to inadequate fast transfer and prolonged power interruption times, as existing methods require comprehensive analysis and frequent adjustments.
Innovation Solution
A method and device that calculate real-time residual voltage and phase angle differences to facilitate fast transfer by setting voltage difference limits, eliminating the need for in-depth knowledge of residual voltage characteristics and allowing automatic adjustments, enabling easier operation and reduced transfer time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If users manually determine parameters for fast bus transfer mode, then transfer speed can be maximized, but operation complexity and difficulty increase significantly
Solution Approach 1:
The system automatically calculates residual voltage characteristics and determines optimal transfer parameters without user intervention. The controller performs real-time analysis of voltage decay curves and autonomously selects transfer timing and mode, eliminating the need for users to manually analyze complex electrical characteristics while maintaining fast transfer performance.
Solution Approach 2:
The system dynamically adjusts transfer parameters based on real-time residual voltage measurements. By continuously monitoring voltage decay and automatically modifying transfer timing and threshold values, the system adapts to varying electrical conditions without requiring user reconfiguration, thus maintaining optimal transfer speed across different operating scenarios.
2Reliability
If users set conservative parameter values to avoid exceeding application range, then system reliability improves, but transfer time increases and fast transfer function becomes inadequate
Solution Approach 1:
The system implements real-time feedback by continuously monitoring residual voltage during the transfer process. Based on actual voltage decay measurements, the controller dynamically adjusts transfer timing and parameters, ensuring reliable operation while minimizing transfer time. This closed-loop control allows the system to safely operate at optimal performance limits rather than conservative fixed parameters.
Solution Approach 2:
The system transitions from static, pre-set transfer parameters to dynamic, real-time parameter adjustment. By continuously adapting transfer timing and thresholds based on actual residual voltage characteristics, the system maintains reliability while achieving faster transfer times that respond to instantaneous electrical conditions rather than relying on fixed conservative values.
3Measurement precision
If comprehensive analysis of residual voltage characteristics is performed to determine parameters, then transfer accuracy improves, but device complexity and user burden increase
Solution Approach 1:
The system extracts only the essential information needed for transfer decision-making from the residual voltage characteristics. By focusing on key parameters such as voltage decay rate and threshold crossing points rather than performing comprehensive analysis of all voltage characteristics, the system achieves sufficient transfer accuracy while significantly reducing computational complexity and user burden.
Solution Approach 2:
The complex residual voltage analysis is segmented into discrete, manageable measurement steps. The system divides the voltage decay process into specific time intervals and evaluates predetermined parameters at each interval, transforming a continuous complex analysis problem into a series of simple discrete measurements that are easier to process and implement.
4Productivity
If fast transfer mode is used to minimize power interruption, then operational continuity is maintained, but parameter determination becomes more critical and difficult
Solution Approach 1:
The system autonomously determines transfer parameters by self-monitoring residual voltage characteristics, eliminating the need for users to perform difficult parameter analysis. This self-determination capability enables fast transfer mode to maintain operational continuity without placing the burden of complex parameter detection and measurement on the user.
Data Source
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AI summary
Disclosed in the present invention are a fast bus transfer method and device to reduce, by transferring between a main power supply and a backup power supply, the impact on a load connected to a bus caused by a power cut. The method comprises: 1) calculating the amplitude of the voltage vector difference between the bus and the backup power supply and the phase angle difference between the bus and the backup power supply; 2) transferring the load on the bus to said backup power supply only when the amplitude is less than its limit value and the phase angle difference is less than 90°. The device comprises: a detection module; a calculation module; a comparison module; and a transfer module. By calculating the real-time residual voltage, it is unnecessary for a user to know all the details of the residual voltage characteristic, and he/she can easily achieve fast transfer simply by setting the limit of the voltage difference at the moment when a circuit breaker of the backup power supply is closed.