Switching Device Control System Synchronization
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Solution Overview
Problem
Existing switching devices fail to maintain synchronization between contact actuations and a reference electrical signal due to deviations in electrical and mechanical parameters from nominal values, leading to misalignment in switching operations and potential arc generation, inrush currents, and transient voltages.
Innovation Solution
A control system that dynamically adjusts the time cycles' duration based on real-time parameter measurements, using correcting factors to ensure synchronization by modifying the time intervals for contact switching operations, thereby compensating for differences in frequency and distance variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control means use fixed time cycles based on nominal parameter values, then the control system is simple and easy to operate, but the synchronization between contact actuations and reference electrical signal deteriorates when actual parameters deviate from nominal values
Solution Approach 1:
The control system dynamically adjusts the time cycle duration based on detected parameter deviations. The predetermined time duration is modified using correcting factors derived from actual measurements of electrical and mechanical parameters, allowing the system to adapt to real-time conditions while maintaining synchronization accuracy
Solution Approach 2:
The control means incorporate detection mechanisms that measure actual electrical and mechanical parameters during operation. These measurements feed back into the control algorithm, which calculates correcting factors to adjust the time cycles, ensuring continuous synchronization even when parameters deviate from nominal values
2Reliability
If the control means adjust the time cycles dynamically based on real parameter values, then the synchronization accuracy is improved, but the device complexity increases
Solution Approach 1:
The system modifies the time cycle parameters based on detected deviations in electrical and mechanical parameters. By changing the predetermined time duration using calculating means that apply correcting factors, the system achieves accurate synchronization without requiring complete redesign of the control architecture
Solution Approach 2:
Calculating means act as intermediaries between the detection means and the control execution. These calculating means process the detected parameter values, compute appropriate correcting factors, and adjust the time cycles accordingly, simplifying the overall control logic while maintaining high synchronization accuracy
3Ease of manufacture
If the predetermined time duration is used without modification, then the control system is stable and easy to implement, but the contact switching occurs at incorrect electrical angles when frequency or distance parameters vary
Solution Approach 1:
The control system performs preliminary detection of electrical and mechanical parameters before executing contact switching. Based on these preliminary measurements, the system calculates and applies correcting factors to the time cycles in advance, ensuring that contact switching occurs at the correct electrical angles even when frequency or distance parameters differ from nominal values
Data Source
AI summary
A method controls a switching device having at least one phase comprising at least one couple of contacts which can be actuated for switching between a closed condition and an open condition. The method provides control means for controlling the actuation of the at least one couple of contacts, such control means being adapted to operate using time cycles; set the time cycles with a predetermined time duration; detects a difference of a value of a parameter associated to the phase with respect a preset value.