Parallel Power Supply Voltage Synchronization via Sensor Data Sharing
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Solution Overview
Problem
In power supply systems with multiple apparatuses connected in parallel to the grid, inexpensive voltage sensors with low accuracy can lead to incorrect prioritization of power suppression, potentially causing grid voltage instability due to varying measured voltage values.
Innovation Solution
Implementing a communication interface and controller within each power supply apparatus to share and adjust voltage sensor measurements with other connected apparatuses, using a grading system to determine the accuracy of sensors and synchronize voltage values, thereby ensuring accurate and synchronized suppression of power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inexpensive voltage sensors are used in multiple power supply apparatuses, then the cost is reduced, but the measurement accuracy deteriorates causing varying voltage values and incorrect suppression prioritization
Solution Approach 1:
Multiple power supply apparatuses share voltage measurement information through a communication network. Each apparatus transmits its measured voltage value and sensor grade to others, and receives the same from peer apparatuses, effectively merging measurement resources to achieve accurate grid voltage detection even when individual sensors are inexpensive
Solution Approach 2:
The communication interface acts as an intermediary that enables exchange of voltage measurement data between power supply apparatuses. This mediator allows each apparatus to access accurate voltage information from others, compensating for the low accuracy of individual inexpensive sensors
2Device complexity
If voltage sensor measurements are not synchronized, then the control complexity is reduced, but the grid voltage stability deteriorates due to incorrect suppression prioritization
Solution Approach 1:
Each power supply apparatus transmits its measured voltage value and sensor grade to other apparatuses via communication interfaces. This feedback mechanism enables all apparatuses to obtain accurate voltage information and sensor characteristics from peers, allowing them to correctly determine suppression prioritization based on actual grid conditions rather than relying solely on their own potentially inaccurate measurements
Solution Approach 2:
The system compares sensor grades (a parameter) to determine which apparatus should prioritize suppression. By using sensor grade as a discrimination parameter, the system establishes a clear prioritization rule that resolves conflicts arising from measurement variations, ensuring stable grid voltage control
Data Source
AI summary
Provided is a plurality of power supply apparatuses connected in parallel with a grid that are capable of obtaining the same measured values of the same voltage.The power supply apparatus according to the present invention is connected in parallel with the grid and includes a voltage sensor 108 configured to obtain a first measured voltage value by measuring a voltage of the grid, a communication interface 114 configured to communicate with another power supply apparatus connected in parallel with the grid, and a controller 118 configured to obtain, via the communication interface 114, a second measured voltage value obtained by the another power supply apparatus by measuring the voltage of the grid and carrying out an adjustment such that the first measured voltage value and the second measured voltage value of the same voltage of the grid approximate to the same value.