Voltage Configuration Selector for Accurate Delta and Wye Power Metering
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Solution Overview
Problem
Power metering equipment is typically designed to calculate power consumption based on a wye configuration, but it fails to accurately measure power in delta configurations without the use of external transformers to simulate a wye configuration.
Innovation Solution
A voltage configuration selector is introduced that uses virtual grounds to produce wye voltages from input voltages and differentiators to calculate delta voltages, allowing the power meter to selectively output either wye or delta voltages, eliminating the need for transformers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If power metering equipment is designed to calculate power consumption based on wye configuration, then it can accurately measure power in wye systems, but it fails to accurately measure power consumption when the voltage configuration is delta
Solution Approach 1:
The power metering equipment is designed to handle both wye and delta voltage configurations through a voltage configuration selector that can switch between different voltage input modes. The system universally processes both configuration types by selecting appropriate voltage signals (phase-to-neutral for wye, phase-to-phase for delta) and applying corresponding calculation algorithms, eliminating the need for separate metering devices for each configuration.
Solution Approach 2:
The system changes operational parameters based on the detected voltage configuration. When delta configuration is detected, the voltage selector switches to provide phase-to-phase voltages and the power calculation component adjusts its calculation methodology accordingly. This parameter adaptation allows accurate measurement across different voltage configurations without hardware modification.
2Adaptability or versatility
If transformers are used to step the phase voltages down to simulate a wye configuration for delta systems, then the power metering equipment can process the signals, but the measurement accuracy deteriorates and equipment complexity increases
Solution Approach 1:
The invention extracts and eliminates the unnecessary transformer component from the traditional delta measurement approach. Instead of using transformers to step down voltages and simulate wye configuration, the system directly accepts phase-to-phase voltages from delta systems through the voltage configuration selector and processes them appropriately, removing the source of measurement error while maintaining compatibility.
Solution Approach 2:
The voltage configuration selector acts as an intermediary between the delta voltage source and the power calculation component. It receives phase-to-phase voltages, conditions them appropriately, and provides them to the calculation component in a format suitable for accurate power computation, eliminating the need for physical voltage transformation while maintaining signal integrity.
3Adaptability or versatility
If transformers are used to convert between phase to phase voltage and phase to neutral voltage, then the equipment can handle both configurations, but the device complexity and equipment requirements increase
Solution Approach 1:
The invention replaces the mechanical/electrical transformation system (transformers) with an electronic selection and processing system. The voltage configuration selector uses electronic switching and signal processing to adapt between wye and delta configurations, eliminating bulky transformer hardware while achieving the same functional adaptability through electronic means.
Data Source
AI summary
Apparatus and methods for providing a voltage signal indicative of the voltage being supplied by each phase of a multiphase voltage being supplied to a load. For each phase, a phase to neutral voltage is produced by providing a virtual ground. For each phase, a phase to phase voltage is produced by determining a difference between a pair of phase to neutral voltages. Either the phase to neutral voltages or the phase to phase voltages for each phase are output depending on the configuration of the multiphase voltage being supplied to the load.