Power Supply Switching Using Early Bus Sampling for Fast Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing quick switching devices in electric power systems require unnecessary delays in determining the conditions for switching to a backup power supply due to waiting for the circuit breaker of the main power supply to completely disconnect before collecting power data, which hinders rapid switching in the event of a fault.
Innovation Solution
The method involves immediately sampling power data on the bus when a trigger condition is identified, such as a fault elimination in the system, without waiting for the circuit breaker to fully open, and using specific criteria to determine the condition for switching to the backup power supply based on the sampled data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the quick switching device waits for the circuit breaker to completely disconnect before collecting power data, then the switching safety is improved, but the switching time is extended
Solution Approach 1:
The patent applies preliminary action by starting to collect power data immediately when the circuit breaker begins to open, rather than waiting for complete disconnection. This allows the switching decision to be prepared in advance, reducing the overall switching time while maintaining safety through continuous monitoring of the disconnection process
Solution Approach 2:
The patent uses feedback by continuously monitoring the circuit breaker's disconnection status and power data during the opening process. This real-time feedback allows the system to determine the optimal switching moment based on actual system conditions, balancing safety requirements with time efficiency
2Measurement precision
If the circuit breaker is completely disconnected before power data collection, then the measurement accuracy is improved, but the switching speed is reduced
Solution Approach 1:
Power data collection is initiated in advance during the circuit breaker opening process, allowing sufficient data to be gathered before the switching decision is executed. This preliminary data collection maintains measurement accuracy while enabling faster switching response
Solution Approach 2:
The patent skips the traditional sequential approach by collecting power data concurrently with the circuit breaker opening process rather than waiting for completion. This rushes through the data collection phase in parallel with the mechanical opening, reducing total switching time while maintaining data quality
Data Source
AI summary
A method and a device for power supply switching in an electric power system include providing an electric power system having two power supplies, each connected to a bus through an incoming line, using the power supply currently supplying power as the main power supply, using the other power supply as a backup power supply, and respectively connecting the two power supplies to a power supply station of a higher level. Upon identifying a trigger condition, sampling of power data on the bus is started, with the trigger condition being used to decide that a fault of the electric power system is eliminated and power is lost from the main power supply. If the time period for sampling of power data reaches a preset threshold, it is determined whether the condition for circuit-closing of the backup power supply is satisfied according to each sampled power data value.