Power Supply Appliance Input Power Limitation
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Solution Overview
Problem
Modern actively controlled power supply appliances do not account for power source overloading, leading to potential network voltage or generator instability and service disruptions.
Innovation Solution
A power supply appliance is introduced between the power source and load to monitor and limit input power based on the power source's status, using methods such as frequency measurement and status signal transfer to prevent overloading, which can involve reducing power supply or disconnecting the load if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If actively controlled power supply appliances load the power source according to their power requirements, then the power supply appliance can meet its power needs, but the power source may become overloaded and its operation jeopardized
Solution Approach 1:
The power supply appliance monitors the status of the power source (such as frequency deviations) and uses this feedback information to dynamically adjust its input power consumption. When the power source shows signs of overloading (frequency drops below reference frequency), the appliance reduces its power intake to prevent further destabilization, thus maintaining power source reliability while still meeting power requirements under normal conditions
Solution Approach 2:
The power supply appliance transitions from a static power consumption mode to a dynamic adaptation mode where it continuously adjusts its power intake based on real-time power source status. The appliance can operate at full power when the source is stable, but automatically reduces power consumption when overloading is detected, making the power relationship flexible and adaptive rather than fixed
2Reliability
If the power supply appliance limits its input power to prevent overloading, then the power source reliability is improved, but the power supplied to the load may be insufficient
Solution Approach 1:
The power supply appliance applies partial power limitation only when necessary - specifically when the power source frequency deviates from the reference frequency indicating overloading. Under normal operating conditions, the appliance consumes full power to meet load requirements. This selective, partial limitation ensures reliability protection is activated only when needed, avoiding unnecessary reduction in productivity during stable operation
Solution Approach 2:
The appliance takes preliminary action by detecting frequency deviations before complete power source failure occurs. By monitoring the power source status in advance and reducing power consumption proactively when early signs of overloading appear, the appliance prevents the development of severe overloading conditions that would completely disrupt power supply, thus maintaining productivity through preventive rather than reactive measures
Data Source
AI summary
The invention relates to an arrangement and a method for limiting the input power of a power supply appliance (1) fitted between a power source (2) and a load (3). The arrangement according to the invention comprises a power supply appliance (1) fitted between a power source (2) and the load to be supplied (3), which power supply appliance (1) is fitted to limit its input power on the basis of the status of the aforementioned power source (2).